Support Helm install action

2020-06-30 01:28:22 +02:00 · 2020-06-30 01:28:22 +02:00 · 51da5f0fe2
parent 2a5c905145
commit 51da5f0fe2
48 changed files with 2098 additions and 364 deletions
--- a/201
+++ b/201
@ -0,0 +1,201 @@
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--- a/7
+++ b/7
@ -0,0 +1,7 @@
+The maintainers are generally available in Slack at
+https://cloud-native.slack.com in #flux (https://cloud-native.slack.com/messages/CLAJ40HV3)
+(obtain an invitation at https://slack.cncf.io/).
+
+In alphabetical order:
+
+Hidde Beydals, Weaveworks <hidde@weave.works> (github: @hiddeco, slack: hidde)
--- a/18
+++ b/18
@ -35,12 +35,26 @@ uninstall: manifests

 # Deploy controller in the configured Kubernetes cluster in ~/.kube/config
 deploy: manifests
-	cd config/manager && kustomize edit set image controller=${IMG}
+	cd config/manager && kustomize edit set image fluxcd/helm-controller=${IMG}
 	kustomize build config/default | kubectl apply -f -

+# Deploy controller dev image in the configured Kubernetes cluster in ~/.kube/config
+dev-deploy: manifests
+	mkdir -p config/dev && cp config/default/* config/dev
+	cd config/dev && kustomize edit set image fluxcd/helm-controller=${IMG}
+	kustomize build config/dev | kubectl apply -f -
+	rm -rf config/dev
+
+# Delete dev deployment and CRDs
+dev-cleanup: manifests
+	mkdir -p config/dev && cp config/default/* config/dev
+	cd config/dev && kustomize edit set image fluxcd/helm-controller=${IMG}
+	kustomize build config/dev | kubectl delete -f -
+	rm -rf config/dev
+
 # Generate manifests e.g. CRD, RBAC etc.
 manifests: controller-gen
-	$(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
+	$(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role paths="./..." output:crd:artifacts:config=config/crd/bases

 # Run go fmt against code
 fmt:
--- a/api/v2alpha1/condition_types.go
+++ b/api/v2alpha1/condition_types.go
@ -0,0 +1,98 @@
+/*
+Copyright 2020 The Flux CD contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v2alpha1
+
+import (
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// Condition contains condition information for a HelmRelease.
+type Condition struct {
+	// Type of the condition, currently ('Ready').
+	// +required
+	Type string `json:"type"`
+
+	// Status of the condition, one of ('True', 'False', 'Unknown').
+	// +required
+	Status corev1.ConditionStatus `json:"status"`
+
+	// LastTransitionTime is the timestamp corresponding to the last status
+	// change of this condition.
+	// +required
+	LastTransitionTime metav1.Time `json:"lastTransitionTime,omitempty"`
+
+	// Reason is a brief machine readable explanation for the condition's last
+	// transition.
+	// +required
+	Reason string `json:"reason,omitempty"`
+
+	// Message is a human readable description of the details of the last
+	// transition, complementing reason.
+	// +optional
+	Message string `json:"message,omitempty"`
+}
+
+const (
+	// ReadyCondition represents the fact that the HelmRelease has been successfully
+	// enrolled on the cluster.
+	ReadyCondition string = "Ready"
+)
+
+const (
+	// InstallSucceededReason represents the fact that the Helm install for the release succeed.
+	InstallSucceededReason string = "InstallSucceeded"
+
+	// InstallFailedReason represents the fact that the Helm install for the release failed.
+	InstallFailedReason string = "InstallFailed"
+
+	// UpgradeSucceededReason represents the fact that the Helm upgrade for the release succeed.
+	UpgradeSucceededReason string = "UpgradeSucceeded"
+
+	// UpgradeFailedReason represents the fact that the Helm upgrade for the release failed.
+	UpgradeFailedReason string = "UpgradeFailed"
+
+	// TestSucceededReason represents the fact that the Helm test for the release succeeded.
+	TestSucceededReason string = "TestSucceeded"
+
+	// TestFailedReason represents the fact that the Helm test for the release failed.
+	TestFailedReason string = "TestFailed"
+
+	// RollbackSucceededReason represents the fact that the Helm rollback for the release succeeded.
+	RollbackSucceededReason string = "RollbackSucceeded"
+
+	// RollbackFailedReason represent the fact that the Helm rollback for the release failed.
+	RollbackFailedReason string = "RollbackFailed"
+
+	// ArtifactFailedReason represents the fact that the artifact download for the release failed.
+	ArtifactFailedReason string = "ArtifactFailed"
+
+	// InitFailedReason represents the fact that the initialization of the Helm configuration failed.
+	InitFailedReason string = "InitFailed"
+
+	// DependencyNotReady represents the fact that the one of the dependencies is not ready.
+	DependencyNotReadyReason string = "DependencyNotReady"
+
+	// InitializedReason represents the fact that a given resource has been initialized.
+	InitializedReason string = "Initialized"
+
+	// ProgressingReason represents the fact that the reconciliation for the resource is underway.
+	ProgressingReason string = "Progressing"
+
+	// SuspendedReason represents the fact that the HelmRelease reconciliation is suspended.
+	SuspendedReason string = "Suspended"
+)
--- a/api/v2alpha1/groupversion_info.go
+++ b/api/v2alpha1/groupversion_info.go
@ -1,5 +1,5 @@
 /*
-Copyright 2020 Hidde Beydals <hello@hidde.co>
+Copyright 2020 The Flux CD contributors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
--- a/api/v2alpha1/helmrelease_types.go
+++ b/api/v2alpha1/helmrelease_types.go
@ -1,5 +1,5 @@
 /*
-Copyright 2020 Hidde Beydals <hello@hidde.co>
+Copyright 2020 The Flux CD contributors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@ -17,28 +17,150 @@ limitations under the License.
 package v2alpha1

 import (
+	"encoding/json"
+
+	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )

-// EDIT THIS FILE!  THIS IS SCAFFOLDING FOR YOU TO OWN!
-// NOTE: json tags are required.  Any new fields you add must have json tags for the fields to be serialized.
-
 // HelmReleaseSpec defines the desired state of HelmRelease
 type HelmReleaseSpec struct {
-	// INSERT ADDITIONAL SPEC FIELDS - desired state of cluster
-	// Important: Run "make" to regenerate code after modifying this file
+	// SourceRef of the HelmChart source.
+	// +required
+	SourceRef corev1.TypedLocalObjectReference `json:"sourceRef"`

-	// Foo is an example field of HelmRelease. Edit HelmRelease_types.go to remove/update
-	Foo string `json:"foo,omitempty"`
+	// Interval at which to reconcile the Helm release.
+	// +required
+	Interval metav1.Duration `json:"interval"`
+
+	// Wait tells the reconciler to wait with marking a Helm action as
+	// successful until all resources are in a ready state. When set, it will
+	// wait for as long as 'Timeout'.
+	// +optional
+	Wait bool `json:"wait,omitempty"`
+
+	// MaxHistory is the number of revisions saved by Helm for this release.
+	// Use '0' for an unlimited number of revisions; defaults to '10'.
+	// +optional
+	MaxHistory *int `json:"maxHistory,omitempty"`
+
+	// Values holds the values for this Helm release.
+	// +optional
+	Values Values `json:"values,omitempty"`
+}
+
+type Values struct {
+	// Data holds the configuration keys and values.
+	// Work around for https://github.com/kubernetes-sigs/kubebuilder/issues/528
+	Data map[string]interface{} `json:"-"`
+}
+
+// MarshalJSON marshals the Values data to a JSON blob.
+func (in Values) MarshalJSON() ([]byte, error) {
+	return json.Marshal(in.Data)
+}
+
+// UnmarshalJSON sets the Values to a copy of data.
+func (in *Values) UnmarshalJSON(data []byte) error {
+	var out map[string]interface{}
+	err := json.Unmarshal(data, &out)
+	if err != nil {
+		return err
+	}
+	in.Data = out
+	return nil
+}
+
+// DeepCopyInto is an deepcopy function, copying the receiver, writing
+// into out. In must be non-nil. Declaring this here prevents it from
+// being generated in zz_generated.deepcopy.go.
+//
+// This is defined here to work around https://github.com/kubernetes/code-generator/issues/50,
+// and partially around https://github.com/kubernetes-sigs/controller-tools/pull/126
+// and https://github.com/kubernetes-sigs/controller-tools/issues/294.
+func (in *Values) DeepCopyInto(out *Values) {
+	b, err := json.Marshal(in.Data)
+	if err != nil {
+		// The marshal should have been performed cleanly as otherwise
+		// the resource would not have been created by the API server.
+		panic(err)
+	}
+	var c map[string]interface{}
+	err = json.Unmarshal(b, &c)
+	if err != nil {
+		panic(err)
+	}
+	out.Data = c
+	return
 }

 // HelmReleaseStatus defines the observed state of HelmRelease
 type HelmReleaseStatus struct {
-	// INSERT ADDITIONAL STATUS FIELD - define observed state of cluster
-	// Important: Run "make" to regenerate code after modifying this file
+	// +optional
+	Conditions []Condition `json:"conditions,omitempty"`
+
+	// LastAppliedRevision is the revision of the last successfully applied source.
+	// +optional
+	LastAppliedRevision string `json:"lastAppliedRevision,omitempty"`
+
+	// LastReleaseRevision is the revision of the last successfully Helm release.
+	// +optional
+	LastReleaseRevision int `json:"lastReleaseRevision,omitempty"`
 }

+func HelmReleaseProgressing(hr HelmRelease) HelmRelease {
+	hr.Status.Conditions = []Condition{
+		{
+			Type:               ReadyCondition,
+			Status:             corev1.ConditionUnknown,
+			LastTransitionTime: metav1.Now(),
+			Reason:             ProgressingReason,
+			Message:            "reconciliation in progress",
+		},
+	}
+	return hr
+}
+
+func HelmReleaseNotReady(hr HelmRelease, reason, message string) HelmRelease {
+	hr.Status.Conditions = []Condition{
+		{
+			Type:               ReadyCondition,
+			Status:             corev1.ConditionFalse,
+			LastTransitionTime: metav1.Now(),
+			Reason:             reason,
+			Message:            message,
+		},
+	}
+	return hr
+}
+
+func HelmReleaseReady(hr HelmRelease, revision string, releaseRevision int, reason, message string) HelmRelease {
+	hr.Status.Conditions = []Condition{
+		{
+			Type:               ReadyCondition,
+			Status:             corev1.ConditionTrue,
+			LastTransitionTime: metav1.Now(),
+			Reason:             reason,
+			Message:            message,
+		},
+	}
+	hr.Status.LastAppliedRevision = revision
+	hr.Status.LastReleaseRevision = releaseRevision
+	return hr
+}
+
+const (
+	// ReconcileAtAnnotation is the annotation used for triggering a
+	// reconciliation outside of the defined schedule.
+	ReconcileAtAnnotation string = "helm.fluxcd.io/reconcileAt"
+
+	// SourceIndexKey is the key used for indexing HelmReleases based on
+	// their sources.
+	SourceIndexKey string = ".metadata.source"
+)
+
 // +kubebuilder:object:root=true
+// +kubebuilder:subresource:status

 // HelmRelease is the Schema for the helmreleases API
 type HelmRelease struct {
--- a/api/v2alpha1/zz_generated.deepcopy.go
+++ b/api/v2alpha1/zz_generated.deepcopy.go
@ -1,7 +1,7 @@
 // +build !ignore_autogenerated

 /*
-Copyright 2020 Hidde Beydals <hello@hidde.co>
+Copyright 2020 The Flux CD contributors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@ -24,13 +24,29 @@ import (
 	runtime "k8s.io/apimachinery/pkg/runtime"
 )

+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Condition) DeepCopyInto(out *Condition) {
+	*out = *in
+	in.LastTransitionTime.DeepCopyInto(&out.LastTransitionTime)
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Condition.
+func (in *Condition) DeepCopy() *Condition {
+	if in == nil {
+		return nil
+	}
+	out := new(Condition)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *HelmRelease) DeepCopyInto(out *HelmRelease) {
 	*out = *in
 	out.TypeMeta = in.TypeMeta
 	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
-	out.Spec = in.Spec
-	out.Status = in.Status
+	in.Spec.DeepCopyInto(&out.Spec)
+	in.Status.DeepCopyInto(&out.Status)
 }

 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new HelmRelease.
@ -86,6 +102,14 @@ func (in *HelmReleaseList) DeepCopyObject() runtime.Object {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *HelmReleaseSpec) DeepCopyInto(out *HelmReleaseSpec) {
 	*out = *in
+	in.SourceRef.DeepCopyInto(&out.SourceRef)
+	out.Interval = in.Interval
+	if in.MaxHistory != nil {
+		in, out := &in.MaxHistory, &out.MaxHistory
+		*out = new(int)
+		**out = **in
+	}
+	in.Values.DeepCopyInto(&out.Values)
 }

 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new HelmReleaseSpec.
@ -101,6 +125,13 @@ func (in *HelmReleaseSpec) DeepCopy() *HelmReleaseSpec {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *HelmReleaseStatus) DeepCopyInto(out *HelmReleaseStatus) {
 	*out = *in
+	if in.Conditions != nil {
+		in, out := &in.Conditions, &out.Conditions
+		*out = make([]Condition, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
 }

 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new HelmReleaseStatus.
@ -112,3 +143,13 @@ func (in *HelmReleaseStatus) DeepCopy() *HelmReleaseStatus {
 	in.DeepCopyInto(out)
 	return out
 }
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Values.
+func (in *Values) DeepCopy() *Values {
+	if in == nil {
+		return nil
+	}
+	out := new(Values)
+	in.DeepCopyInto(out)
+	return out
+}
--- a/config/certmanager/certificate.yaml
+++ b/config/certmanager/certificate.yaml
@ -1,26 +0,0 @@
-# The following manifests contain a self-signed issuer CR and a certificate CR.
-# More document can be found at https://docs.cert-manager.io
-# WARNING: Targets CertManager 0.11 check https://docs.cert-manager.io/en/latest/tasks/upgrading/index.html for 
-# breaking changes
-apiVersion: cert-manager.io/v1alpha2
-kind: Issuer
-metadata:
-  name: selfsigned-issuer
-  namespace: system
-spec:
-  selfSigned: {}
---
-apiVersion: cert-manager.io/v1alpha2
-kind: Certificate
-metadata:
-  name: serving-cert  # this name should match the one appeared in kustomizeconfig.yaml
-  namespace: system
-spec:
-  # $(SERVICE_NAME) and $(SERVICE_NAMESPACE) will be substituted by kustomize
-  dnsNames:
-  - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc
-  - $(SERVICE_NAME).$(SERVICE_NAMESPACE).svc.cluster.local
-  issuerRef:
-    kind: Issuer
-    name: selfsigned-issuer
-  secretName: webhook-server-cert # this secret will not be prefixed, since it's not managed by kustomize
--- a/config/certmanager/kustomization.yaml
+++ b/config/certmanager/kustomization.yaml
@ -1,5 +0,0 @@
-resources:
- certificate.yaml
-
-configurations:
- kustomizeconfig.yaml
--- a/config/certmanager/kustomizeconfig.yaml
+++ b/config/certmanager/kustomizeconfig.yaml
@ -1,16 +0,0 @@
-# This configuration is for teaching kustomize how to update name ref and var substitution 
-nameReference:
- kind: Issuer
-  group: cert-manager.io
-  fieldSpecs:
-  - kind: Certificate
-    group: cert-manager.io
-    path: spec/issuerRef/name
-
-varReference:
- kind: Certificate
-  group: cert-manager.io
-  path: spec/commonName
- kind: Certificate
-  group: cert-manager.io
-  path: spec/dnsNames
--- a/config/crd/bases/helm.fluxcd.io_helmreleases.yaml
+++ b/config/crd/bases/helm.fluxcd.io_helmreleases.yaml
@ -15,6 +15,8 @@ spec:
    plural: helmreleases
    singular: helmrelease
  scope: Namespaced
+  subresources:
+    status: {}
  validation:
    openAPIV3Schema:
      description: HelmRelease is the Schema for the helmreleases API
@ -34,13 +36,84 @@ spec:
        spec:
          description: HelmReleaseSpec defines the desired state of HelmRelease
          properties:
-            foo:
-              description: Foo is an example field of HelmRelease. Edit HelmRelease_types.go
-                to remove/update
+            interval:
+              description: Interval at which to reconcile the Helm release.
              type: string
+            maxHistory:
+              description: MaxHistory is the number of revisions saved by Helm for
+                this release. Use '0' for an unlimited number of revisions; defaults
+                to '10'.
+              type: integer
+            sourceRef:
+              description: SourceRef of the HelmChart source.
+              properties:
+                apiGroup:
+                  description: APIGroup is the group for the resource being referenced.
+                    If APIGroup is not specified, the specified Kind must be in the
+                    core API group. For any other third-party types, APIGroup is required.
+                  type: string
+                kind:
+                  description: Kind is the type of resource being referenced
+                  type: string
+                name:
+                  description: Name is the name of resource being referenced
+                  type: string
+              required:
+              - kind
+              - name
+              type: object
+            values:
+              description: Values holds the values for this Helm release.
+              type: object
+            wait:
+              description: Wait tells the reconciler to wait with marking a Helm action
+                as successful until all resources are in a ready state. When set,
+                it will wait for as long as 'Timeout'.
+              type: boolean
+          required:
+          - interval
+          - sourceRef
          type: object
        status:
          description: HelmReleaseStatus defines the observed state of HelmRelease
+          properties:
+            conditions:
+              items:
+                description: Condition contains condition information for a HelmRelease.
+                properties:
+                  lastTransitionTime:
+                    description: LastTransitionTime is the timestamp corresponding
+                      to the last status change of this condition.
+                    format: date-time
+                    type: string
+                  message:
+                    description: Message is a human readable description of the details
+                      of the last transition, complementing reason.
+                    type: string
+                  reason:
+                    description: Reason is a brief machine readable explanation for
+                      the condition's last transition.
+                    type: string
+                  status:
+                    description: Status of the condition, one of ('True', 'False',
+                      'Unknown').
+                    type: string
+                  type:
+                    description: Type of the condition, currently ('Ready').
+                    type: string
+                required:
+                - status
+                - type
+                type: object
+              type: array
+            lastAppliedRevision:
+              description: LastAppliedRevision is the revision of the last successfully
+                applied source.
+              type: string
+            lastReleaseRevision:
+              description: LastReleaseRevision is the revision of the last successfully
+                Helm release.
+              type: integer
          type: object
      type: object
  version: v2alpha1
--- a/config/default/kustomization.yaml
+++ b/config/default/kustomization.yaml
@ -1,70 +1,10 @@
-# Adds namespace to all resources.
-namespace: helm-controller-system
-
-# Value of this field is prepended to the
-# names of all resources, e.g. a deployment named
-# "wordpress" becomes "alices-wordpress".
-# Note that it should also match with the prefix (text before '-') of the namespace
-# field above.
-namePrefix: helm-controller-
-
-# Labels to add to all resources and selectors.
-#commonLabels:
-#  someName: someValue
-
-bases:
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: helm-system
+resources:
 - ../crd
 - ../rbac
 - ../manager
-# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in 
-# crd/kustomization.yaml
-#- ../webhook
-# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. 'WEBHOOK' components are required.
-#- ../certmanager
-# [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'. 
-#- ../prometheus
-
-patchesStrategicMerge:
-  # Protect the /metrics endpoint by putting it behind auth.
-  # If you want your controller-manager to expose the /metrics
-  # endpoint w/o any authn/z, please comment the following line.
- manager_auth_proxy_patch.yaml
-
-# [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in 
-# crd/kustomization.yaml
-#- manager_webhook_patch.yaml
-
-# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'.
-# Uncomment 'CERTMANAGER' sections in crd/kustomization.yaml to enable the CA injection in the admission webhooks.
-# 'CERTMANAGER' needs to be enabled to use ca injection
-#- webhookcainjection_patch.yaml
-
-# the following config is for teaching kustomize how to do var substitution
-vars:
-# [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER' prefix.
-#- name: CERTIFICATE_NAMESPACE # namespace of the certificate CR
-#  objref:
-#    kind: Certificate
-#    group: cert-manager.io
-#    version: v1alpha2
-#    name: serving-cert # this name should match the one in certificate.yaml
-#  fieldref:
-#    fieldpath: metadata.namespace
-#- name: CERTIFICATE_NAME
-#  objref:
-#    kind: Certificate
-#    group: cert-manager.io
-#    version: v1alpha2
-#    name: serving-cert # this name should match the one in certificate.yaml
-#- name: SERVICE_NAMESPACE # namespace of the service
-#  objref:
-#    kind: Service
-#    version: v1
-#    name: webhook-service
-#  fieldref:
-#    fieldpath: metadata.namespace
-#- name: SERVICE_NAME
-#  objref:
-#    kind: Service
-#    version: v1
-#    name: webhook-service
+- github.com/fluxcd/source-controller/config//crd?ref=v0.0.1
+- github.com/fluxcd/source-controller/config//manager?ref=v0.0.1
+- namespace.yaml
--- a/config/default/manager_auth_proxy_patch.yaml
+++ b/config/default/manager_auth_proxy_patch.yaml
@ -1,25 +0,0 @@
-# This patch inject a sidecar container which is a HTTP proxy for the 
-# controller manager, it performs RBAC authorization against the Kubernetes API using SubjectAccessReviews.
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: controller-manager
-  namespace: system
-spec:
-  template:
-    spec:
-      containers:
-      - name: kube-rbac-proxy
-        image: gcr.io/kubebuilder/kube-rbac-proxy:v0.5.0
-        args:
-        - "--secure-listen-address=0.0.0.0:8443"
-        - "--upstream=http://127.0.0.1:8080/"
-        - "--logtostderr=true"
-        - "--v=10"
-        ports:
-        - containerPort: 8443
-          name: https
-      - name: manager
-        args:
-        - "--metrics-addr=127.0.0.1:8080"
-        - "--enable-leader-election"
--- a/config/default/manager_webhook_patch.yaml
+++ b/config/default/manager_webhook_patch.yaml
@ -1,23 +0,0 @@
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: controller-manager
-  namespace: system
-spec:
-  template:
-    spec:
-      containers:
-      - name: manager
-        ports:
-        - containerPort: 9443
-          name: webhook-server
-          protocol: TCP
-        volumeMounts:
-        - mountPath: /tmp/k8s-webhook-server/serving-certs
-          name: cert
-          readOnly: true
-      volumes:
-      - name: cert
-        secret:
-          defaultMode: 420
-          secretName: webhook-server-cert
--- a/config/default/namespace.yaml
+++ b/config/default/namespace.yaml
@ -0,0 +1,6 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  labels:
+    control-plane: controller
+  name: helm-system
--- a/config/default/webhookcainjection_patch.yaml
+++ b/config/default/webhookcainjection_patch.yaml
@ -1,15 +0,0 @@
-# This patch add annotation to admission webhook config and
-# the variables $(CERTIFICATE_NAMESPACE) and $(CERTIFICATE_NAME) will be substituted by kustomize.
-apiVersion: admissionregistration.k8s.io/v1beta1
-kind: MutatingWebhookConfiguration
-metadata:
-  name: mutating-webhook-configuration
-  annotations:
-    cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME)
---
-apiVersion: admissionregistration.k8s.io/v1beta1
-kind: ValidatingWebhookConfiguration
-metadata:
-  name: validating-webhook-configuration
-  annotations:
-    cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME)
--- a/config/manager/deployment.yaml
+++ b/config/manager/deployment.yaml
@ -0,0 +1,52 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: helm-controller
+  labels:
+    control-plane: controller
+spec:
+  selector:
+    matchLabels:
+      app: helm-controller
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: helm-controller
+    spec:
+      terminationGracePeriodSeconds: 10
+      containers:
+      - name: manager
+        image: fluxcd/helm-controller
+        imagePullPolicy: IfNotPresent
+        securityContext:
+          allowPrivilegeEscalation: false
+          readOnlyRootFilesystem: true
+        ports:
+          - containerPort: 8282
+            name: http-prom
+        env:
+          - name: RUNTIME_NAMESPACE
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace
+        livenessProbe:
+          httpGet:
+            port: http-prom
+            path: /metrics
+        args:
+          - --enable-leader-election
+          - --log-json
+        resources:
+          limits:
+            cpu: 500m
+            memory: 512Mi
+          requests:
+            cpu: 100m
+            memory: 64Mi
+        volumeMounts:
+          - name: temp
+            mountPath: /tmp
+      volumes:
+        - name: temp
+          emptyDir: {}
--- a/config/manager/kustomization.yaml
+++ b/config/manager/kustomization.yaml
@ -1,2 +1,8 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
 resources:
- manager.yaml
+  - deployment.yaml
+images:
+  - name: fluxcd/helm-controller
+    newName: fluxcd/helm-controller
+    newTag: v0.0.1-alpha.1
--- a/config/manager/manager.yaml
+++ b/config/manager/manager.yaml
@ -1,39 +0,0 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  labels:
-    control-plane: controller-manager
-  name: system
---
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: controller-manager
-  namespace: system
-  labels:
-    control-plane: controller-manager
-spec:
-  selector:
-    matchLabels:
-      control-plane: controller-manager
-  replicas: 1
-  template:
-    metadata:
-      labels:
-        control-plane: controller-manager
-    spec:
-      containers:
-      - command:
-        - /manager
-        args:
-        - --enable-leader-election
-        image: controller:latest
-        name: manager
-        resources:
-          limits:
-            cpu: 100m
-            memory: 30Mi
-          requests:
-            cpu: 100m
-            memory: 20Mi
-      terminationGracePeriodSeconds: 10
--- a/config/prometheus/kustomization.yaml
+++ b/config/prometheus/kustomization.yaml
@ -1,2 +0,0 @@
-resources:
- monitor.yaml
--- a/config/prometheus/monitor.yaml
+++ b/config/prometheus/monitor.yaml
@ -1,16 +0,0 @@
-
-# Prometheus Monitor Service (Metrics)
-apiVersion: monitoring.coreos.com/v1
-kind: ServiceMonitor
-metadata:
-  labels:
-    control-plane: controller-manager
-  name: controller-manager-metrics-monitor
-  namespace: system
-spec:
-  endpoints:
-    - path: /metrics
-      port: https
-  selector:
-    matchLabels:
-      control-plane: controller-manager
--- a/config/rbac/auth_proxy_client_clusterrole.yaml
+++ b/config/rbac/auth_proxy_client_clusterrole.yaml
@ -1,7 +0,0 @@
-apiVersion: rbac.authorization.k8s.io/v1beta1
-kind: ClusterRole
-metadata:
-  name: metrics-reader
-rules:
- nonResourceURLs: ["/metrics"]
-  verbs: ["get"]
--- a/config/rbac/auth_proxy_role.yaml
+++ b/config/rbac/auth_proxy_role.yaml
@ -1,13 +0,0 @@
-apiVersion: rbac.authorization.k8s.io/v1
-kind: ClusterRole
-metadata:
-  name: proxy-role
-rules:
- apiGroups: ["authentication.k8s.io"]
-  resources:
-  - tokenreviews
-  verbs: ["create"]
- apiGroups: ["authorization.k8s.io"]
-  resources:
-  - subjectaccessreviews
-  verbs: ["create"]
--- a/config/rbac/auth_proxy_service.yaml
+++ b/config/rbac/auth_proxy_service.yaml
@ -1,14 +0,0 @@
-apiVersion: v1
-kind: Service
-metadata:
-  labels:
-    control-plane: controller-manager
-  name: controller-manager-metrics-service
-  namespace: system
-spec:
-  ports:
-  - name: https
-    port: 8443
-    targetPort: https
-  selector:
-    control-plane: controller-manager
--- a/config/rbac/cluster_role.yaml
+++ b/config/rbac/cluster_role.yaml
@ -0,0 +1,10 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: reconciler-role
+rules:
+  - apiGroups: ['*']
+    resources: ['*']
+    verbs: ['*']
+  - nonResourceURLs: ['*']
+    verbs: ['*']
--- a/config/rbac/auth_proxy_role_binding.yaml
+++ b/config/rbac/auth_proxy_role_binding.yaml
@ -1,12 +1,11 @@
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRoleBinding
 metadata:
-  name: proxy-rolebinding
+  name: reconciler-rolebinding
 roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
-  name: proxy-role
+  name: reconciler-role
 subjects:
  - kind: ServiceAccount
    name: default
-  namespace: system
--- a/config/rbac/kustomization.yaml
+++ b/config/rbac/kustomization.yaml
@ -3,10 +3,6 @@ resources:
 - role_binding.yaml
 - leader_election_role.yaml
 - leader_election_role_binding.yaml
-# Comment the following 4 lines if you want to disable
-# the auth proxy (https://github.com/brancz/kube-rbac-proxy)
-# which protects your /metrics endpoint.
- auth_proxy_service.yaml
- auth_proxy_role.yaml
- auth_proxy_role_binding.yaml
- auth_proxy_client_clusterrole.yaml
+- cluster_role.yaml
+- cluster_role_binding.yaml
+namePrefix: helm-
--- a/config/rbac/role.yaml
+++ b/config/rbac/role.yaml
@ -1,4 +1,3 @@
-
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
@ -26,3 +25,17 @@ rules:
  - get
  - patch
  - update
+- apiGroups:
+  - source.fluxcd.io
+  resources:
+  - helmcharts
+  verbs:
+  - get
+  - list
+  - watch
+- apiGroups:
+  - source.fluxcd.io
+  resources:
+  - helmcharts/status
+  verbs:
+  - get
--- a/config/samples/helm_v2alpha1_helmrelease.yaml
+++ b/config/samples/helm_v2alpha1_helmrelease.yaml
@ -1,7 +1,9 @@
 apiVersion: helm.fluxcd.io/v2alpha1
 kind: HelmRelease
 metadata:
-  name: helmrelease-sample
+  name: podinfo
 spec:
-  # Add fields here
-  foo: bar
+  interval: 5m
+  sourceRef:
+    kind: HelmChart
+    name: podinfo-v2
--- a/config/samples/source_v1alpha1_helmchart.yaml
+++ b/config/samples/source_v1alpha1_helmchart.yaml
@ -0,0 +1,18 @@
+apiVersion: source.fluxcd.io/v1alpha1
+kind: HelmRepository
+metadata:
+  name: podinfo
+spec:
+  interval: 1m
+  url: https://stefanprodan.github.io/podinfo
+---
+apiVersion: source.fluxcd.io/v1alpha1
+kind: HelmChart
+metadata:
+  name: podinfo-v2
+spec:
+  name: podinfo
+  version: '^2.0.0'
+  helmRepositoryRef:
+    name: podinfo
+  interval: 1m
--- a/config/webhook/kustomization.yaml
+++ b/config/webhook/kustomization.yaml
@ -1,6 +0,0 @@
-resources:
- manifests.yaml
- service.yaml
-
-configurations:
- kustomizeconfig.yaml
--- a/config/webhook/kustomizeconfig.yaml
+++ b/config/webhook/kustomizeconfig.yaml
@ -1,25 +0,0 @@
-# the following config is for teaching kustomize where to look at when substituting vars.
-# It requires kustomize v2.1.0 or newer to work properly.
-nameReference:
- kind: Service
-  version: v1
-  fieldSpecs:
-  - kind: MutatingWebhookConfiguration
-    group: admissionregistration.k8s.io
-    path: webhooks/clientConfig/service/name
-  - kind: ValidatingWebhookConfiguration
-    group: admissionregistration.k8s.io
-    path: webhooks/clientConfig/service/name
-
-namespace:
- kind: MutatingWebhookConfiguration
-  group: admissionregistration.k8s.io
-  path: webhooks/clientConfig/service/namespace
-  create: true
- kind: ValidatingWebhookConfiguration
-  group: admissionregistration.k8s.io
-  path: webhooks/clientConfig/service/namespace
-  create: true
-
-varReference:
- path: metadata/annotations
--- a/config/webhook/service.yaml
+++ b/config/webhook/service.yaml
@ -1,12 +0,0 @@
-
-apiVersion: v1
-kind: Service
-metadata:
-  name: webhook-service
-  namespace: system
-spec:
-  ports:
-    - port: 443
-      targetPort: 9443
-  selector:
-    control-plane: controller-manager
--- a/controllers/helmchart_predicate.go
+++ b/controllers/helmchart_predicate.go
@ -0,0 +1,63 @@
+/*
+Copyright 2020 The Flux CD contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package controllers
+
+import (
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+
+	sourcev1 "github.com/fluxcd/source-controller/api/v1alpha1"
+)
+
+type HelmChartRevisionChangePredicate struct {
+	predicate.Funcs
+}
+
+func (HelmChartRevisionChangePredicate) Update(e event.UpdateEvent) bool {
+	if e.MetaOld == nil || e.MetaNew == nil {
+		return false
+	}
+
+	oldChart, ok := e.ObjectOld.(*sourcev1.HelmChart)
+	if !ok {
+		return false
+	}
+
+	newChart, ok := e.ObjectNew.(*sourcev1.HelmChart)
+	if !ok {
+		return false
+	}
+
+	if oldChart.GetArtifact() == nil && newChart.GetArtifact() != nil {
+		return true
+	}
+
+	if oldChart.GetArtifact() != nil && newChart.GetArtifact() != nil &&
+		oldChart.GetArtifact().Revision != newChart.GetArtifact().Revision {
+		return true
+	}
+
+	return false
+}
+
+func (HelmChartRevisionChangePredicate) Create(e event.CreateEvent) bool {
+	return false
+}
+
+func (HelmChartRevisionChangePredicate) Delete(e event.DeleteEvent) bool {
+	return false
+}
--- a/controllers/helmchart_watcher.go
+++ b/controllers/helmchart_watcher.go
@ -0,0 +1,130 @@
+/*
+Copyright 2020 The Flux CD contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package controllers
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/go-logr/logr"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/util/retry"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	sourcev1 "github.com/fluxcd/source-controller/api/v1alpha1"
+
+	helmreleasev2 "github.com/fluxcd/helm-controller/api/v2alpha1"
+)
+
+// HelmChartWatcher watches HelmChart objects for revision changes and
+// triggers a sync for all the HelmReleases that reference a changed source.
+type HelmChartWatcher struct {
+	client.Client
+	Log    logr.Logger
+	Scheme *runtime.Scheme
+}
+
+// +kubebuilder:rbac:groups=source.fluxcd.io,resources=helmcharts,verbs=get;list;watch
+// +kubebuilder:rbac:groups=source.fluxcd.io,resources=helmcharts/status,verbs=get
+
+func (r *HelmChartWatcher) Reconcile(req ctrl.Request) (ctrl.Result, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+
+	var chart sourcev1.HelmChart
+	if err := r.Get(ctx, req.NamespacedName, &chart); err != nil {
+		return ctrl.Result{}, client.IgnoreNotFound(err)
+	}
+
+	log := r.Log.WithValues(strings.ToLower(chart.Kind), req.NamespacedName)
+	log.Info("new artifact detected", "revision", chart.GetArtifact().Revision)
+
+	// Get the list of HelmReleases that are using this HelmChart.
+	var list helmreleasev2.HelmReleaseList
+	if err := r.List(ctx, &list, client.InNamespace(req.Namespace),
+		client.MatchingFields{helmreleasev2.SourceIndexKey: req.Name}); err != nil {
+		log.Error(err, "unable to list HelmReleases")
+		return ctrl.Result{}, err
+	}
+
+	// TODO(hidde): dependency sort
+
+	// Trigger reconciliation for each HelmRelease using this HelmChart.
+	for _, hr := range list.Items {
+		namespacedName := types.NamespacedName{Namespace: hr.Namespace, Name: hr.Name}
+		if err := r.requestReconciliation(ctx, hr); err != nil {
+			log.Error(err, "unable to annotate HelmRelease", strings.ToLower(hr.Kind), namespacedName)
+			continue
+		}
+		log.Info("requested immediate reconciliation", strings.ToLower(hr.Kind), namespacedName)
+	}
+
+	return ctrl.Result{}, nil
+}
+
+func (r *HelmChartWatcher) SetupWithManager(mgr ctrl.Manager) error {
+	// Create a HelmRelease index based on the HelmChart name
+	err := mgr.GetFieldIndexer().IndexField(context.TODO(), &helmreleasev2.HelmRelease{}, helmreleasev2.SourceIndexKey,
+		func(rawObj runtime.Object) []string {
+			hr := rawObj.(*helmreleasev2.HelmRelease)
+			if hr.Spec.SourceRef.Kind == "HelmChart" {
+				return []string{hr.Spec.SourceRef.Name}
+			}
+			return nil
+		},
+	)
+	if err != nil {
+		return err
+	}
+
+	return ctrl.NewControllerManagedBy(mgr).
+		For(&sourcev1.HelmChart{}).
+		WithEventFilter(HelmChartRevisionChangePredicate{}).
+		Complete(r)
+}
+
+// requestReconciliation annotates the given HelmRelease to be reconciled immediately.
+func (r *HelmChartWatcher) requestReconciliation(ctx context.Context, hr helmreleasev2.HelmRelease) error {
+	firstTry := true
+	return retry.RetryOnConflict(retry.DefaultBackoff, func() (err error) {
+		if !firstTry {
+			if err := r.Get(context.TODO(),
+				types.NamespacedName{Namespace: hr.Namespace, Name: hr.Name},
+				&hr,
+			); err != nil {
+				return err
+			}
+		}
+
+		firstTry = false
+		if hr.Annotations == nil {
+			hr.Annotations = make(map[string]string)
+		}
+		hr.Annotations[helmreleasev2.ReconcileAtAnnotation] = metav1.Now().String()
+		// Prevent strings can't be nil err as API package does not mark APIGroup with omitempty.
+		if hr.Spec.SourceRef.APIGroup == nil {
+			emptyAPIGroup := ""
+			hr.Spec.SourceRef.APIGroup = &emptyAPIGroup
+		}
+		err = r.Update(ctx, &hr)
+		return
+	})
+}
--- a/controllers/helmrelease_controller.go
+++ b/controllers/helmrelease_controller.go
@ -1,5 +1,5 @@
 /*
-Copyright 2020 Hidde Beydals <hello@hidde.co>
+Copyright 2020 The Flux CD contributors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@ -18,18 +18,41 @@ package controllers

 import (
 	"context"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+	"time"

+	sourcev1 "github.com/fluxcd/source-controller/api/v1alpha1"
 	"github.com/go-logr/logr"
+	"helm.sh/helm/v3/pkg/action"
+	"helm.sh/helm/v3/pkg/chart"
+	"helm.sh/helm/v3/pkg/chart/loader"
+	"helm.sh/helm/v3/pkg/release"
+	"helm.sh/helm/v3/pkg/storage/driver"
 	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+	"k8s.io/client-go/rest"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/controller"

-	helmv2alpha1 "github.com/fluxcd/helm-controller/api/v2alpha1"
+	_ "helm.sh/helm/v3/pkg/action"
+
+	v2 "github.com/fluxcd/helm-controller/api/v2alpha1"
+	"github.com/fluxcd/helm-controller/internal/lockedfile"
 )

 // HelmReleaseReconciler reconciles a HelmRelease object
 type HelmReleaseReconciler struct {
 	client.Client
+	Config *rest.Config
 	Log    logr.Logger
 	Scheme *runtime.Scheme
 }
@ -38,16 +61,184 @@ type HelmReleaseReconciler struct {
 // +kubebuilder:rbac:groups=helm.fluxcd.io,resources=helmreleases/status,verbs=get;update;patch

 func (r *HelmReleaseReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
-	_ = context.Background()
-	_ = r.Log.WithValues("helmrelease", req.NamespacedName)
+	ctx := context.Background()
+	start := time.Now()

-	// your logic here
+	var hr v2.HelmRelease
+	if err := r.Get(ctx, req.NamespacedName, &hr); err != nil {
+		return ctrl.Result{}, client.IgnoreNotFound(err)
+	}

+	log := r.Log.WithValues(strings.ToLower(hr.Kind), req.NamespacedName)
+
+	hr = v2.HelmReleaseProgressing(hr)
+	if err := r.Status().Update(ctx, &hr); err != nil {
+		log.Error(err, "unable to update HelmRelease status")
+		return ctrl.Result{Requeue: true}, err
+	}
+
+	var source sourcev1.Source
+	// Get artifact source from HelmChart
+	if hr.Spec.SourceRef.Kind == "HelmChart" {
+		var helmChart sourcev1.HelmChart
+		chartName := types.NamespacedName{
+			Namespace: hr.GetNamespace(),
+			Name:      hr.Spec.SourceRef.Name,
+		}
+		err := r.Client.Get(ctx, chartName, &helmChart)
+		if err != nil {
+			log.Error(err, "HelmChart not found", "helmchart", chartName)
+			return ctrl.Result{Requeue: true}, err
+		}
+		source = &helmChart
+	}
+
+	if source == nil {
+		err := fmt.Errorf("source '%s' kind '%s' not supported", hr.Spec.SourceRef.Name, hr.Spec.SourceRef.Kind)
+		return ctrl.Result{}, err
+	}
+
+	// Check source readiness
+	if source.GetArtifact() == nil {
+		msg := "Source is not ready"
+		hr = v2.HelmReleaseNotReady(hr, v2.ArtifactFailedReason, msg)
+		if err := r.Status().Update(ctx, &hr); err != nil {
+			log.Error(err, "unable to update HelmRelease status")
+			return ctrl.Result{Requeue: true}, err
+		}
+		log.Info(msg)
 		return ctrl.Result{}, nil
 	}

-func (r *HelmReleaseReconciler) SetupWithManager(mgr ctrl.Manager) error {
+	reconciledHr, err := r.release(hr, source)
+	if err != nil {
+		log.Error(err, "HelmRelease reconciliation failed", "revision", source.GetArtifact().Revision)
+	}
+
+	if err := r.Status().Update(ctx, &reconciledHr); err != nil {
+		log.Error(err, "unable to update HelmRelease status after reconciliation")
+		return ctrl.Result{Requeue: true}, err
+	}
+
+	// Log reconciliation duration
+	log.Info(fmt.Sprintf("HelmRelease reconcilation finished in %s, next run in %s",
+		time.Now().Sub(start).String(),
+		hr.Spec.Interval.Duration.String(),
+	))
+
+	return ctrl.Result{RequeueAfter: hr.Spec.Interval.Duration}, nil
+}
+
+type HelmReleaseReconcilerOptions struct {
+	MaxConcurrentReconciles int
+}
+
+func (r *HelmReleaseReconciler) SetupWithManager(mgr ctrl.Manager, opts HelmReleaseReconcilerOptions) error {
 	return ctrl.NewControllerManagedBy(mgr).
-		For(&helmv2alpha1.HelmRelease{}).
+		For(&v2.HelmRelease{}).
+		WithEventFilter(HelmReleaseReconcileAtPredicate{}).
+		WithOptions(controller.Options{MaxConcurrentReconciles: opts.MaxConcurrentReconciles}).
 		Complete(r)
 }
+
+func (r *HelmReleaseReconciler) release(hr v2.HelmRelease, source sourcev1.Source) (v2.HelmRelease, error) {
+	// Acquire lock
+	unlock, err := r.lock(fmt.Sprintf("%s-%s", hr.GetName(), hr.GetNamespace()))
+	if err != nil {
+		err = fmt.Errorf("tmp dir error: %w", err)
+		return v2.HelmReleaseNotReady(hr, sourcev1.StorageOperationFailedReason, err.Error()), err
+	}
+	defer unlock()
+
+	// Create temp working dir
+	tmpDir, err := ioutil.TempDir("", hr.Name)
+	if err != nil {
+		err = fmt.Errorf("tmp dir error: %w", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Download artifact
+	artifactPath, err := r.download(source.GetArtifact().URL, tmpDir)
+	if err != nil {
+		return v2.HelmReleaseNotReady(hr, v2.ArtifactFailedReason, "artifact acquisition failed"), err
+	}
+
+	// Load chart
+	chart, err := loader.Load(artifactPath)
+	if err != nil {
+		return v2.HelmReleaseNotReady(hr, v2.ArtifactFailedReason, "failed to load chart"), err
+	}
+
+	// Initialize config
+	cfg, err := r.newActionCfg(hr)
+	if err != nil {
+		return v2.HelmReleaseNotReady(hr, v2.InitFailedReason, "failed to initialize Helm configuration"), err
+	}
+
+	rel, err := cfg.Releases.Deployed(hr.Name)
+	if err != nil && err != driver.ErrReleaseNotFound {
+		return v2.HelmReleaseNotReady(hr, v2.InitFailedReason, "failed to determine if release exists"), err
+	}
+
+	if err == driver.ErrReleaseNotFound {
+		rel, err = r.install(cfg, chart, hr)
+		if err != nil {
+			return v2.HelmReleaseNotReady(hr, v2.InstallFailedReason, err.Error()), err
+		}
+	} else {
+		// upgrade
+	}
+
+	return v2.HelmReleaseReady(hr, source.GetArtifact().Revision, rel.Version, v2.InstallSucceededReason, "installation succeeded"), nil
+}
+
+func (r *HelmReleaseReconciler) install(cfg *action.Configuration, chart *chart.Chart, hr v2.HelmRelease) (*release.Release, error) {
+	install := action.NewInstall(cfg)
+	install.ReleaseName = hr.Name
+	install.Namespace = hr.Namespace
+
+	return install.Run(chart, hr.Spec.Values.Data)
+}
+
+func (r *HelmReleaseReconciler) lock(name string) (unlock func(), err error) {
+	lockFile := path.Join(os.TempDir(), name+".lock")
+	mutex := lockedfile.MutexAt(lockFile)
+	return mutex.Lock()
+}
+
+func (r *HelmReleaseReconciler) download(url, tmpDir string) (string, error) {
+	fp := filepath.Join(tmpDir, "artifact.tar.gz")
+	out, err := os.Create(fp)
+	if err != nil {
+		return "", err
+	}
+	defer out.Close()
+
+	resp, err := http.Get(url)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return fp, fmt.Errorf("artifact '%s' download failed (status code: %s)", url, resp.Status)
+	}
+
+	if _, err = io.Copy(out, resp.Body); err != nil {
+		return "", err
+	}
+
+	return fp, nil
+}
+
+func (r *HelmReleaseReconciler) newActionCfg(hr v2.HelmRelease) (*action.Configuration, error) {
+	cfg := new(action.Configuration)
+	// TODO(hidde): write our own init
+	err := cfg.Init(&genericclioptions.ConfigFlags{
+		Namespace:   &hr.Namespace,
+		APIServer:   &r.Config.Host,
+		CAFile:      &r.Config.CAFile,
+		BearerToken: &r.Config.BearerToken,
+	}, hr.Namespace, "secret", r.Log.Info)
+	return cfg, err
+}
--- a/controllers/helmrelease_predicate.go
+++ b/controllers/helmrelease_predicate.go
@ -0,0 +1,49 @@
+/*
+Copyright 2020 The Flux CD contributors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package controllers
+
+import (
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/predicate"
+
+	"github.com/fluxcd/helm-controller/api/v2alpha1"
+)
+
+type HelmReleaseReconcileAtPredicate struct {
+	predicate.Funcs
+}
+
+func (HelmReleaseReconcileAtPredicate) Update(e event.UpdateEvent) bool {
+	// Ignore objects without metadata
+	if e.MetaOld == nil || e.MetaNew == nil {
+		return false
+	}
+
+	// Reconcile on spec changes
+	if e.MetaNew.GetGeneration() != e.MetaOld.GetGeneration() {
+		return true
+	}
+
+	// Handle ReconcileAt annotation
+	if val, ok := e.MetaNew.GetAnnotations()[v2alpha1.ReconcileAtAnnotation]; ok {
+		if valOld, okOld := e.MetaOld.GetAnnotations()[v2alpha1.ReconcileAtAnnotation]; okOld {
+			return val != valOld
+		}
+		return true
+	}
+	return false
+}
--- a/controllers/suite_test.go
+++ b/controllers/suite_test.go
@ -1,5 +1,5 @@
 /*
-Copyright 2020 Hidde Beydals <hello@hidde.co>
+Copyright 2020 The Flux CD contributors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
--- a/go.mod
+++ b/go.mod
@ -3,10 +3,14 @@ module github.com/fluxcd/helm-controller
 go 1.13

 require (
+	github.com/fluxcd/source-controller v0.0.1
 	github.com/go-logr/logr v0.1.0
 	github.com/onsi/ginkgo v1.11.0
 	github.com/onsi/gomega v1.8.1
-	k8s.io/apimachinery v0.18.2
+	helm.sh/helm/v3 v3.2.4
+	k8s.io/api v0.18.4
+	k8s.io/apimachinery v0.18.4
+	k8s.io/cli-runtime v0.18.0
 	k8s.io/client-go v0.18.2
 	sigs.k8s.io/controller-runtime v0.6.0
 )
--- a/go.sum
+++ b/go.sum
@ -1,8 +1,12 @@
+bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898/go.mod h1:Xbm+BRKSBEpa4q4hTSxohYNQpsxXPbPry4JJWOB3LB8=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.38.0 h1:ROfEUZz+Gh5pa62DJWXSaonyu3StP6EA6lPEXPI6mCo=
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+github.com/Azure/azure-sdk-for-go v16.2.1+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
+github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
+github.com/Azure/go-autorest v10.8.1+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
 github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
 github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
 github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
@ -10,28 +14,93 @@ github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxB
 github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
 github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
 github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/DATA-DOG/go-sqlmock v1.4.1 h1:ThlnYciV1iM/V0OSF/dtkqWb6xo5qITT1TJBG1MRDJM=
+github.com/DATA-DOG/go-sqlmock v1.4.1/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
+github.com/MakeNowJust/heredoc v0.0.0-20170808103936-bb23615498cd h1:sjQovDkwrZp8u+gxLtPgKGjk5hCxuy2hrRejBTA9xFU=
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@ -87,11 +208,13 @@ github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+
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@ -105,6 +228,7 @@ github.com/go-openapi/spec v0.0.0-20160808142527-6aced65f8501/go.mod h1:J8+jY1nA
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@ -114,17 +238,38 @@ github.com/go-openapi/swag v0.0.0-20160704191624-1d0bd113de87/go.mod h1:DXUve3Dp
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@ -134,11 +279,18 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
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 go.mongodb.org/mongo-driver v1.1.1/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
 go.mongodb.org/mongo-driver v1.1.2/go.mod h1:u7ryQJ+DOzQmeO7zB6MHyr8jkEQvC8vH7qLUO4lqsUM=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
+go.opencensus.io v0.22.0 h1:C9hSCOW830chIVkdja34wa6Ky+IzWllkUinR+BtRZd4=
+go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.uber.org/atomic v1.3.2 h1:2Oa65PReHzfn29GpvgsYwloV9AVFHPDk8tYxt2c2tr4=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0 h1:cxzIVoETapQEqDhQu3QfnvXAV4AlzcvUCxkVUFw3+EU=
@ -290,20 +611,35 @@ go.uber.org/multierr v1.1.0 h1:HoEmRHQPVSqub6w2z2d2EOVs2fjyFRGyofhKuyDq0QI=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
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 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
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 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190211182817-74369b46fc67/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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@ -316,12 +652,18 @@ golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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+golang.org/x/net v0.0.0-20190522155817-f3200d17e092/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
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@ -331,8 +673,10 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@ -341,14 +685,23 @@ golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@ -364,39 +717,68 @@ golang.org/x/tools v0.0.0-20181011042414-1f849cf54d09/go.mod h1:n7NCudcB/nEzxVGm
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 k8s.io/kube-openapi v0.0.0-20200121204235-bf4fb3bd569c/go.mod h1:GRQhZsXIAJ1xR0C9bd8UpWHZ5plfAS9fzPjJuQ6JL3E=
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+k8s.io/kubectl v0.17.2 h1:QZR8Q6lWiVRjwKslekdbN5WPMp53dS/17j5e+oi5XVU=
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+k8s.io/metrics v0.18.0/go.mod h1:8aYTW18koXqjLVKL7Ds05RPMX9ipJZI3mywYvBOxXd4=
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+modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk=
+modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k=
+modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs=
+modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I=
+rsc.io/letsencrypt v0.0.3 h1:H7xDfhkaFFSYEJlKeq38RwX2jYcnTeHuDQyT+mMNMwM=
+rsc.io/letsencrypt v0.0.3/go.mod h1:buyQKZ6IXrRnB7TdkHP0RyEybLx18HHyOSoTyoOLqNY=
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+sigs.k8s.io/controller-runtime v0.5.0/go.mod h1:REiJzC7Y00U+2YkMbT8wxgrsX5USpXKGhb2sCtAXiT8=
 sigs.k8s.io/controller-runtime v0.6.0 h1:Fzna3DY7c4BIP6KwfSlrfnj20DJ+SeMBK8HSFvOk9NM=
 sigs.k8s.io/controller-runtime v0.6.0/go.mod h1:CpYf5pdNY/B352A1TFLAS2JVSlnGQ5O2cftPHndTroo=
+sigs.k8s.io/kustomize v2.0.3+incompatible h1:JUufWFNlI44MdtnjUqVnvh29rR37PQFzPbLXqhyOyX0=
+sigs.k8s.io/kustomize v2.0.3+incompatible/go.mod h1:MkjgH3RdOWrievjo6c9T245dYlB5QeXV4WCbnt/PEpU=
+sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
+sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06 h1:zD2IemQ4LmOcAumeiyDWXKUI2SO0NYDe3H6QGvPOVgU=
+sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06/go.mod h1:/ULNhyfzRopfcjskuui0cTITekDduZ7ycKN3oUT9R18=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0-20200116222232-67a7b8c61874/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0 h1:dOmIZBMfhcHS09XZkMyUgkq5trg3/jRyJYFZUiaOp8E=
 sigs.k8s.io/structured-merge-diff/v3 v3.0.0/go.mod h1:PlARxl6Hbt/+BC80dRLi1qAmnMqwqDg62YvvVkZjemw=
@ -446,3 +883,4 @@ sigs.k8s.io/yaml v1.1.0 h1:4A07+ZFc2wgJwo8YNlQpr1rVlgUDlxXHhPJciaPY5gs=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
+vbom.ml/util v0.0.0-20160121211510-db5cfe13f5cc/go.mod h1:so/NYdZXCz+E3ZpW0uAoCj6uzU2+8OWDFv/HxUSs7kI=
--- a/hack/boilerplate.go.txt
+++ b/hack/boilerplate.go.txt
@ -1,5 +1,5 @@
 /*
-Copyright 2020 Hidde Beydals <hello@hidde.co>
+Copyright 2020 The Flux CD contributors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
--- a/internal/lockedfile/LICENSE
+++ b/internal/lockedfile/LICENSE
@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/internal/lockedfile/internal/filelock/filelock.go
+++ b/internal/lockedfile/internal/filelock/filelock.go
@ -0,0 +1,98 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package filelock provides a platform-independent API for advisory file
+// locking. Calls to functions in this package on platforms that do not support
+// advisory locks will return errors for which IsNotSupported returns true.
+package filelock
+
+import (
+	"errors"
+	"os"
+)
+
+// A File provides the minimal set of methods required to lock an open file.
+// File implementations must be usable as map keys.
+// The usual implementation is *os.File.
+type File interface {
+	// Name returns the name of the file.
+	Name() string
+
+	// Fd returns a valid file descriptor.
+	// (If the File is an *os.File, it must not be closed.)
+	Fd() uintptr
+
+	// Stat returns the FileInfo structure describing file.
+	Stat() (os.FileInfo, error)
+}
+
+// Lock places an advisory write lock on the file, blocking until it can be
+// locked.
+//
+// If Lock returns nil, no other process will be able to place a read or write
+// lock on the file until this process exits, closes f, or calls Unlock on it.
+//
+// If f's descriptor is already read- or write-locked, the behavior of Lock is
+// unspecified.
+//
+// Closing the file may or may not release the lock promptly. Callers should
+// ensure that Unlock is always called when Lock succeeds.
+func Lock(f File) error {
+	return lock(f, writeLock)
+}
+
+// RLock places an advisory read lock on the file, blocking until it can be locked.
+//
+// If RLock returns nil, no other process will be able to place a write lock on
+// the file until this process exits, closes f, or calls Unlock on it.
+//
+// If f is already read- or write-locked, the behavior of RLock is unspecified.
+//
+// Closing the file may or may not release the lock promptly. Callers should
+// ensure that Unlock is always called if RLock succeeds.
+func RLock(f File) error {
+	return lock(f, readLock)
+}
+
+// Unlock removes an advisory lock placed on f by this process.
+//
+// The caller must not attempt to unlock a file that is not locked.
+func Unlock(f File) error {
+	return unlock(f)
+}
+
+// String returns the name of the function corresponding to lt
+// (Lock, RLock, or Unlock).
+func (lt lockType) String() string {
+	switch lt {
+	case readLock:
+		return "RLock"
+	case writeLock:
+		return "Lock"
+	default:
+		return "Unlock"
+	}
+}
+
+// IsNotSupported returns a boolean indicating whether the error is known to
+// report that a function is not supported (possibly for a specific input).
+// It is satisfied by ErrNotSupported as well as some syscall errors.
+func IsNotSupported(err error) bool {
+	return isNotSupported(underlyingError(err))
+}
+
+var ErrNotSupported = errors.New("operation not supported")
+
+// underlyingError returns the underlying error for known os error types.
+func underlyingError(err error) error {
+	switch err := err.(type) {
+	case *os.PathError:
+		return err.Err
+	case *os.LinkError:
+		return err.Err
+	case *os.SyscallError:
+		return err.Err
+	}
+	return err
+}
--- a/internal/lockedfile/internal/filelock/filelock_unix.go
+++ b/internal/lockedfile/internal/filelock/filelock_unix.go
@ -0,0 +1,44 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package filelock
+
+import (
+	"os"
+	"syscall"
+)
+
+type lockType int16
+
+const (
+	readLock  lockType = syscall.LOCK_SH
+	writeLock lockType = syscall.LOCK_EX
+)
+
+func lock(f File, lt lockType) (err error) {
+	for {
+		err = syscall.Flock(int(f.Fd()), int(lt))
+		if err != syscall.EINTR {
+			break
+		}
+	}
+	if err != nil {
+		return &os.PathError{
+			Op:   lt.String(),
+			Path: f.Name(),
+			Err:  err,
+		}
+	}
+	return nil
+}
+
+func unlock(f File) error {
+	return lock(f, syscall.LOCK_UN)
+}
+
+func isNotSupported(err error) bool {
+	return err == syscall.ENOSYS || err == syscall.ENOTSUP || err == syscall.EOPNOTSUPP || err == ErrNotSupported
+}
--- a/internal/lockedfile/lockedfile.go
+++ b/internal/lockedfile/lockedfile.go
@ -0,0 +1,187 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package lockedfile creates and manipulates files whose contents should only
+// change atomically.
+package lockedfile
+
+import (
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"runtime"
+)
+
+// A File is a locked *os.File.
+//
+// Closing the file releases the lock.
+//
+// If the program exits while a file is locked, the operating system releases
+// the lock but may not do so promptly: callers must ensure that all locked
+// files are closed before exiting.
+type File struct {
+	osFile
+	closed bool
+}
+
+// osFile embeds a *os.File while keeping the pointer itself unexported.
+// (When we close a File, it must be the same file descriptor that we opened!)
+type osFile struct {
+	*os.File
+}
+
+// OpenFile is like os.OpenFile, but returns a locked file.
+// If flag includes os.O_WRONLY or os.O_RDWR, the file is write-locked;
+// otherwise, it is read-locked.
+func OpenFile(name string, flag int, perm os.FileMode) (*File, error) {
+	var (
+		f   = new(File)
+		err error
+	)
+	f.osFile.File, err = openFile(name, flag, perm)
+	if err != nil {
+		return nil, err
+	}
+
+	// Although the operating system will drop locks for open files when the go
+	// command exits, we want to hold locks for as little time as possible, and we
+	// especially don't want to leave a file locked after we're done with it. Our
+	// Close method is what releases the locks, so use a finalizer to report
+	// missing Close calls on a best-effort basis.
+	runtime.SetFinalizer(f, func(f *File) {
+		panic(fmt.Sprintf("lockedfile.File %s became unreachable without a call to Close", f.Name()))
+	})
+
+	return f, nil
+}
+
+// Open is like os.Open, but returns a read-locked file.
+func Open(name string) (*File, error) {
+	return OpenFile(name, os.O_RDONLY, 0)
+}
+
+// Create is like os.Create, but returns a write-locked file.
+func Create(name string) (*File, error) {
+	return OpenFile(name, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
+}
+
+// Edit creates the named file with mode 0666 (before umask),
+// but does not truncate existing contents.
+//
+// If Edit succeeds, methods on the returned File can be used for I/O.
+// The associated file descriptor has mode O_RDWR and the file is write-locked.
+func Edit(name string) (*File, error) {
+	return OpenFile(name, os.O_RDWR|os.O_CREATE, 0666)
+}
+
+// Close unlocks and closes the underlying file.
+//
+// Close may be called multiple times; all calls after the first will return a
+// non-nil error.
+func (f *File) Close() error {
+	if f.closed {
+		return &os.PathError{
+			Op:   "close",
+			Path: f.Name(),
+			Err:  os.ErrClosed,
+		}
+	}
+	f.closed = true
+
+	err := closeFile(f.osFile.File)
+	runtime.SetFinalizer(f, nil)
+	return err
+}
+
+// Read opens the named file with a read-lock and returns its contents.
+func Read(name string) ([]byte, error) {
+	f, err := Open(name)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	return ioutil.ReadAll(f)
+}
+
+// Write opens the named file (creating it with the given permissions if needed),
+// then write-locks it and overwrites it with the given content.
+func Write(name string, content io.Reader, perm os.FileMode) (err error) {
+	f, err := OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
+	if err != nil {
+		return err
+	}
+
+	_, err = io.Copy(f, content)
+	if closeErr := f.Close(); err == nil {
+		err = closeErr
+	}
+	return err
+}
+
+// Transform invokes t with the result of reading the named file, with its lock
+// still held.
+//
+// If t returns a nil error, Transform then writes the returned contents back to
+// the file, making a best effort to preserve existing contents on error.
+//
+// t must not modify the slice passed to it.
+func Transform(name string, t func([]byte) ([]byte, error)) (err error) {
+	f, err := Edit(name)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	old, err := ioutil.ReadAll(f)
+	if err != nil {
+		return err
+	}
+
+	new, err := t(old)
+	if err != nil {
+		return err
+	}
+
+	if len(new) > len(old) {
+		// The overall file size is increasing, so write the tail first: if we're
+		// about to run out of space on the disk, we would rather detect that
+		// failure before we have overwritten the original contents.
+		if _, err := f.WriteAt(new[len(old):], int64(len(old))); err != nil {
+			// Make a best effort to remove the incomplete tail.
+			f.Truncate(int64(len(old)))
+			return err
+		}
+	}
+
+	// We're about to overwrite the old contents. In case of failure, make a best
+	// effort to roll back before we close the file.
+	defer func() {
+		if err != nil {
+			if _, err := f.WriteAt(old, 0); err == nil {
+				f.Truncate(int64(len(old)))
+			}
+		}
+	}()
+
+	if len(new) >= len(old) {
+		if _, err := f.WriteAt(new[:len(old)], 0); err != nil {
+			return err
+		}
+	} else {
+		if _, err := f.WriteAt(new, 0); err != nil {
+			return err
+		}
+		// The overall file size is decreasing, so shrink the file to its final size
+		// after writing. We do this after writing (instead of before) so that if
+		// the write fails, enough filesystem space will likely still be reserved
+		// to contain the previous contents.
+		if err := f.Truncate(int64(len(new))); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
--- a/internal/lockedfile/lockedfile_filelock.go
+++ b/internal/lockedfile/lockedfile_filelock.go
@ -0,0 +1,64 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !plan9
+
+package lockedfile
+
+import (
+	"os"
+
+	"github.com/fluxcd/helm-controller/internal/lockedfile/internal/filelock"
+)
+
+func openFile(name string, flag int, perm os.FileMode) (*os.File, error) {
+	// On BSD systems, we could add the O_SHLOCK or O_EXLOCK flag to the OpenFile
+	// call instead of locking separately, but we have to support separate locking
+	// calls for Linux and Windows anyway, so it's simpler to use that approach
+	// consistently.
+
+	f, err := os.OpenFile(name, flag&^os.O_TRUNC, perm)
+	if err != nil {
+		return nil, err
+	}
+
+	switch flag & (os.O_RDONLY | os.O_WRONLY | os.O_RDWR) {
+	case os.O_WRONLY, os.O_RDWR:
+		err = filelock.Lock(f)
+	default:
+		err = filelock.RLock(f)
+	}
+	if err != nil {
+		f.Close()
+		return nil, err
+	}
+
+	if flag&os.O_TRUNC == os.O_TRUNC {
+		if err := f.Truncate(0); err != nil {
+			// The documentation for os.O_TRUNC says “if possible, truncate file when
+			// opened”, but doesn't define “possible” (golang.org/issue/28699).
+			// We'll treat regular files (and symlinks to regular files) as “possible”
+			// and ignore errors for the rest.
+			if fi, statErr := f.Stat(); statErr != nil || fi.Mode().IsRegular() {
+				filelock.Unlock(f)
+				f.Close()
+				return nil, err
+			}
+		}
+	}
+
+	return f, nil
+}
+
+func closeFile(f *os.File) error {
+	// Since locking syscalls operate on file descriptors, we must unlock the file
+	// while the descriptor is still valid — that is, before the file is closed —
+	// and avoid unlocking files that are already closed.
+	err := filelock.Unlock(f)
+
+	if closeErr := f.Close(); err == nil {
+		err = closeErr
+	}
+	return err
+}
--- a/internal/lockedfile/mutex.go
+++ b/internal/lockedfile/mutex.go
@ -0,0 +1,67 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package lockedfile
+
+import (
+	"fmt"
+	"os"
+	"sync"
+)
+
+// A Mutex provides mutual exclusion within and across processes by locking a
+// well-known file. Such a file generally guards some other part of the
+// filesystem: for example, a Mutex file in a directory might guard access to
+// the entire tree rooted in that directory.
+//
+// Mutex does not implement sync.Locker: unlike a sync.Mutex, a lockedfile.Mutex
+// can fail to lock (e.g. if there is a permission error in the filesystem).
+//
+// Like a sync.Mutex, a Mutex may be included as a field of a larger struct but
+// must not be copied after first use. The Path field must be set before first
+// use and must not be change thereafter.
+type Mutex struct {
+	Path string     // The path to the well-known lock file. Must be non-empty.
+	mu   sync.Mutex // A redundant mutex. The race detector doesn't know about file locking, so in tests we may need to lock something that it understands.
+}
+
+// MutexAt returns a new Mutex with Path set to the given non-empty path.
+func MutexAt(path string) *Mutex {
+	if path == "" {
+		panic("lockedfile.MutexAt: path must be non-empty")
+	}
+	return &Mutex{Path: path}
+}
+
+func (mu *Mutex) String() string {
+	return fmt.Sprintf("lockedfile.Mutex(%s)", mu.Path)
+}
+
+// Lock attempts to lock the Mutex.
+//
+// If successful, Lock returns a non-nil unlock function: it is provided as a
+// return-value instead of a separate method to remind the caller to check the
+// accompanying error. (See https://golang.org/issue/20803.)
+func (mu *Mutex) Lock() (unlock func(), err error) {
+	if mu.Path == "" {
+		panic("lockedfile.Mutex: missing Path during Lock")
+	}
+
+	// We could use either O_RDWR or O_WRONLY here. If we choose O_RDWR and the
+	// file at mu.Path is write-only, the call to OpenFile will fail with a
+	// permission error. That's actually what we want: if we add an RLock method
+	// in the future, it should call OpenFile with O_RDONLY and will require the
+	// files must be readable, so we should not let the caller make any
+	// assumptions about Mutex working with write-only files.
+	f, err := OpenFile(mu.Path, os.O_RDWR|os.O_CREATE, 0666)
+	if err != nil {
+		return nil, err
+	}
+	mu.mu.Lock()
+
+	return func() {
+		mu.mu.Unlock()
+		f.Close()
+	}, nil
+}
--- a/main.go
+++ b/main.go
@ -1,5 +1,5 @@
 /*
-Copyright 2020 Hidde Beydals <hello@hidde.co>
+Copyright 2020 The Flux CD contributors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@ -20,6 +20,7 @@ import (
 	"flag"
 	"os"

+	sourcev1 "github.com/fluxcd/source-controller/api/v1alpha1"
 	"k8s.io/apimachinery/pkg/runtime"
 	clientgoscheme "k8s.io/client-go/kubernetes/scheme"
 	_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
@ -39,20 +40,28 @@ var (
 func init() {
 	_ = clientgoscheme.AddToScheme(scheme)

+	_ = sourcev1.AddToScheme(scheme)
 	_ = helmv2alpha1.AddToScheme(scheme)
 	// +kubebuilder:scaffold:scheme
 }

 func main() {
-	var metricsAddr string
-	var enableLeaderElection bool
+	var (
+		metricsAddr          string
+		enableLeaderElection bool
+		concurrent           int
+		logJSON              bool
+	)
+
 	flag.StringVar(&metricsAddr, "metrics-addr", ":8080", "The address the metric endpoint binds to.")
 	flag.BoolVar(&enableLeaderElection, "enable-leader-election", false,
 		"Enable leader election for controller manager. "+
 			"Enabling this will ensure there is only one active controller manager.")
+	flag.IntVar(&concurrent, "concurrent", 4, "The number of concurrent HelmRelease reconciles.")
+	flag.BoolVar(&logJSON, "log-json", false, "Set logging to JSON format.")
 	flag.Parse()

-	ctrl.SetLogger(zap.New(zap.UseDevMode(true)))
+	ctrl.SetLogger(zap.New(zap.UseDevMode(!logJSON)))

 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
 		Scheme:             scheme,
@ -66,11 +75,20 @@ func main() {
 		os.Exit(1)
 	}

-	if err = (&controllers.HelmReleaseReconciler{
+	if err = (&controllers.HelmChartWatcher{
 		Client: mgr.GetClient(),
-		Log:    ctrl.Log.WithName("controllers").WithName("HelmRelease"),
+		Log:    ctrl.Log.WithName("controllers").WithName("HelmChart"),
 		Scheme: mgr.GetScheme(),
 	}).SetupWithManager(mgr); err != nil {
+		setupLog.Error(err, "unable to create controller", "controller", "HelmChart")
+		os.Exit(1)
+	}
+	if err = (&controllers.HelmReleaseReconciler{
+		Client: mgr.GetClient(),
+		Config: mgr.GetConfig(),
+		Log:    ctrl.Log.WithName("controllers").WithName("HelmRelease"),
+		Scheme: mgr.GetScheme(),
+	}).SetupWithManager(mgr, controllers.HelmReleaseReconcilerOptions{MaxConcurrentReconciles: concurrent}); err != nil {
 		setupLog.Error(err, "unable to create controller", "controller", "HelmRelease")
 		os.Exit(1)
 	}