mirror of https://github.com/crossplane/docs.git
343 lines
17 KiB
Markdown
343 lines
17 KiB
Markdown
---
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title: Install Crossplane
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weight: 100
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---
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Crossplane installs into an existing Kubernetes cluster, creating the
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`Crossplane` pod, enabling the installation of Crossplane _Provider_ resources.
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{{< hint type="tip" >}}
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If you don't have a Kubernetes cluster create one locally with [Kind](https://kind.sigs.k8s.io/).
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{{< /hint >}}
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## Prerequisites
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* An actively [supported Kubernetes version](https://kubernetes.io/releases/patch-releases/#support-period)
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* [Helm](https://helm.sh/docs/intro/install/) version `v3.2.0` or later
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## Install Crossplane
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Install Crossplane using the Crossplane published _Helm chart_.
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### Add the Crossplane Helm repository
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Add the Crossplane repository with the `helm repo add` command.
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```shell
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helm repo add crossplane-stable https://charts.crossplane.io/stable
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```
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Update the
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local Helm chart cache with `helm repo update`.
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```shell
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helm repo update
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```
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### Install the Crossplane Helm chart
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Install the Crossplane Helm chart with `helm install`.
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{{< hint "tip" >}}
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View the changes Crossplane makes to your cluster with the
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`helm install --dry-run --debug` options. Helm shows what configurations it
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applies without making changes to the Kubernetes cluster.
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{{< /hint >}}
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Crossplane creates and installs into the `crossplane-system` namespace.
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```shell
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helm install crossplane \
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--namespace crossplane-system \
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--create-namespace crossplane-stable/crossplane
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```
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View the installed Crossplane pods with `kubectl get pods -n crossplane-system`.
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```shell {copy-lines="1"}
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kubectl get pods -n crossplane-system
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NAME READY STATUS RESTARTS AGE
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crossplane-6d67f8cd9d-g2gjw 1/1 Running 0 26m
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crossplane-rbac-manager-86d9b5cf9f-2vc4s 1/1 Running 0 26m
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```
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{{< hint "tip" >}}
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Install a specific version of Crossplane with the `--version <version>` option. For example, to install version `1.10.0`:
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```shell
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helm install crossplane \
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--namespace crossplane-system \
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--create-namespace crossplane-stable/crossplane \
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--version 1.10.0
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```
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{{< /hint >}}
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## Installed deployments
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Crossplane creates two Kubernetes _deployments_ in the `crossplane-system`
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namespace to deploy the Crossplane pods.
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```shell {copy-lines="1"}
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kubectl get deployments -n crossplane-system
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NAME READY UP-TO-DATE AVAILABLE AGE
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crossplane 1/1 1 1 8m13s
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crossplane-rbac-manager 1/1 1 1 8m13s
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```
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### Crossplane deployment
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The Crossplane deployment starts with the `crossplane-init container`. The
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`init` container installs the Crossplane _Custom Resource Definitions_ into the
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Kubernetes cluster.
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After the `init` container finishes, the `crossplane` pod manages two Kubernetes
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controllers.
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* The _Package Manager controller_ installs the
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provider, function and configuration packages.
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* The _Composition controller_ installs and manages the
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Crossplane _Composite Resource Definitions_, _Compositions_ and _Claims_.
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### Crossplane RBAC manager deployment
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The `crossplane-rbac-manager` creates and manages Kubernetes _ClusterRoles_ for
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installed Crossplane _Provider_ and their _Custom Resource Definitions_.
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The
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[Crossplane RBAC Manager design document](https://github.com/crossplane/crossplane/blob/main/design/design-doc-rbac-manager.md)
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has more information on the installed _ClusterRoles_.
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## Installation options
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### Customize the Crossplane Helm chart
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Crossplane supports customizations at install time by configuring the Helm
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chart.
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Apply customizations with the command line or with a Helm _values_ file.
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<!-- Generated from Helm README at https://github.com/crossplane/crossplane/blob/main/cluster/charts/crossplane/README.md -->
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<!-- vale gitlab.Substitutions = NO -->
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<!-- allow lowercase yaml -->
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{{<expand "All Crossplane customization options" >}}
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{{< table "table table-hover table-striped table-sm">}}
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| Parameter | Description | Default |
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| --- | --- | --- |
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| `affinity` | Add `affinities` to the Crossplane pod deployment. | `{}` |
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| `args` | Add custom arguments to the Crossplane pod. | `[]` |
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| `configuration.packages` | A list of Configuration packages to install. | `[]` |
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| `customAnnotations` | Add custom `annotations` to the Crossplane pod deployment. | `{}` |
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| `customLabels` | Add custom `labels` to the Crossplane pod deployment. | `{}` |
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| `deploymentStrategy` | The deployment strategy for the Crossplane and RBAC Manager pods. | `"RollingUpdate"` |
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| `dnsPolicy` | Specify the `dnsPolicy` to be used by the Crossplane pod. | `""` |
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| `extraEnvVarsCrossplane` | Add custom environmental variables to the Crossplane pod deployment. Replaces any `.` in a variable name with `_`. For example, `SAMPLE.KEY=value1` becomes `SAMPLE_KEY=value1`. | `{}` |
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| `extraEnvVarsRBACManager` | Add custom environmental variables to the RBAC Manager pod deployment. Replaces any `.` in a variable name with `_`. For example, `SAMPLE.KEY=value1` becomes `SAMPLE_KEY=value1`. | `{}` |
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| `extraObjects` | To add arbitrary Kubernetes Objects during a Helm Install | `[]` |
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| `extraVolumeMountsCrossplane` | Add custom `volumeMounts` to the Crossplane pod. | `{}` |
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| `extraVolumesCrossplane` | Add custom `volumes` to the Crossplane pod. | `{}` |
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| `function.packages` | A list of Function packages to install | `[]` |
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| `functionCache.medium` | Set to `Memory` to hold the function cache in a RAM backed file system. Useful for Crossplane development. | `""` |
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| `functionCache.pvc` | The name of a PersistentVolumeClaim to use as the function cache. Disables the default function cache `emptyDir` Volume. | `""` |
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| `functionCache.sizeLimit` | The size limit for the function cache. If medium is `Memory` the `sizeLimit` can't exceed Node memory. | `"512Mi"` |
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| `hostNetwork` | Enable `hostNetwork` for the Crossplane deployment. Caution: enabling `hostNetwork` grants the Crossplane Pod access to the host network namespace. Consider setting `dnsPolicy` to `ClusterFirstWithHostNet`. | `false` |
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| `image.pullPolicy` | The image pull policy used for Crossplane and RBAC Manager pods. | `"IfNotPresent"` |
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| `image.repository` | Repository for the Crossplane pod image. | `"xpkg.crossplane.io/crossplane/crossplane"` |
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| `image.tag` | The Crossplane image tag. Defaults to the value of `appVersion` in `Chart.yaml`. | `""` |
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| `imagePullSecrets` | The imagePullSecret names to add to the Crossplane ServiceAccount. | `[]` |
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| `leaderElection` | Enable [leader election](https://docs.crossplane.io/latest/concepts/pods/#leader-election) for the Crossplane pod. | `true` |
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| `metrics.enabled` | Enable Prometheus path, port and scrape annotations and expose port 8080 for both the Crossplane and RBAC Manager pods. | `false` |
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| `metrics.port` | The port the metrics server listens on. | `""` |
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| `nodeSelector` | Add `nodeSelectors` to the Crossplane pod deployment. | `{}` |
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| `packageCache.configMap` | The name of a ConfigMap to use as the package cache. Disables the default package cache `emptyDir` Volume. | `""` |
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| `packageCache.medium` | Set to `Memory` to hold the package cache in a RAM backed file system. Useful for Crossplane development. | `""` |
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| `packageCache.pvc` | The name of a PersistentVolumeClaim to use as the package cache. Disables the default package cache `emptyDir` Volume. | `""` |
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| `packageCache.sizeLimit` | The size limit for the package cache. If medium is `Memory` the `sizeLimit` can't exceed Node memory. | `"20Mi"` |
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| `podSecurityContextCrossplane` | Add a custom `securityContext` to the Crossplane pod. | `{}` |
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| `podSecurityContextRBACManager` | Add a custom `securityContext` to the RBAC Manager pod. | `{}` |
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| `priorityClassName` | The PriorityClass name to apply to the Crossplane and RBAC Manager pods. | `""` |
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| `provider.packages` | A list of Provider packages to install. | `[]` |
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| `rbacManager.affinity` | Add `affinities` to the RBAC Manager pod deployment. | `{}` |
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| `rbacManager.args` | Add custom arguments to the RBAC Manager pod. | `[]` |
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| `rbacManager.deploy` | Deploy the RBAC Manager pod and its required roles. | `true` |
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| `rbacManager.leaderElection` | Enable [leader election](https://docs.crossplane.io/latest/concepts/pods/#leader-election) for the RBAC Manager pod. | `true` |
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| `rbacManager.nodeSelector` | Add `nodeSelectors` to the RBAC Manager pod deployment. | `{}` |
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| `rbacManager.replicas` | The number of RBAC Manager pod `replicas` to deploy. | `1` |
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| `rbacManager.revisionHistoryLimit` | The number of RBAC Manager ReplicaSets to retain. | `nil` |
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| `rbacManager.skipAggregatedClusterRoles` | Don't install aggregated Crossplane ClusterRoles. | `false` |
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| `rbacManager.tolerations` | Add `tolerations` to the RBAC Manager pod deployment. | `[]` |
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| `rbacManager.topologySpreadConstraints` | Add `topologySpreadConstraints` to the RBAC Manager pod deployment. | `[]` |
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| `readiness.port` | The port the readyz server listens on. | `""` |
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| `registryCaBundleConfig.key` | The ConfigMap key containing a custom CA bundle to enable fetching packages from registries with unknown or untrusted certificates. | `""` |
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| `registryCaBundleConfig.name` | The ConfigMap name containing a custom CA bundle to enable fetching packages from registries with unknown or untrusted certificates. | `""` |
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| `replicas` | The number of Crossplane pod `replicas` to deploy. | `1` |
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| `resourcesCrossplane.limits.cpu` | CPU resource limits for the Crossplane pod. | `"500m"` |
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| `resourcesCrossplane.limits.memory` | Memory resource limits for the Crossplane pod. | `"1024Mi"` |
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| `resourcesCrossplane.requests.cpu` | CPU resource requests for the Crossplane pod. | `"100m"` |
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| `resourcesCrossplane.requests.memory` | Memory resource requests for the Crossplane pod. | `"256Mi"` |
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| `resourcesRBACManager.limits.cpu` | CPU resource limits for the RBAC Manager pod. | `"100m"` |
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| `resourcesRBACManager.limits.memory` | Memory resource limits for the RBAC Manager pod. | `"512Mi"` |
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| `resourcesRBACManager.requests.cpu` | CPU resource requests for the RBAC Manager pod. | `"100m"` |
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| `resourcesRBACManager.requests.memory` | Memory resource requests for the RBAC Manager pod. | `"256Mi"` |
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| `revisionHistoryLimit` | The number of Crossplane ReplicaSets to retain. | `nil` |
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| `runtimeClassName` | The runtimeClassName name to apply to the Crossplane and RBAC Manager pods. | `""` |
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| `securityContextCrossplane.allowPrivilegeEscalation` | Enable `allowPrivilegeEscalation` for the Crossplane pod. | `false` |
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| `securityContextCrossplane.readOnlyRootFilesystem` | Set the Crossplane pod root file system as read-only. | `true` |
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| `securityContextCrossplane.runAsGroup` | The group ID used by the Crossplane pod. | `65532` |
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| `securityContextCrossplane.runAsUser` | The user ID used by the Crossplane pod. | `65532` |
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| `securityContextRBACManager.allowPrivilegeEscalation` | Enable `allowPrivilegeEscalation` for the RBAC Manager pod. | `false` |
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| `securityContextRBACManager.readOnlyRootFilesystem` | Set the RBAC Manager pod root file system as read-only. | `true` |
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| `securityContextRBACManager.runAsGroup` | The group ID used by the RBAC Manager pod. | `65532` |
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| `securityContextRBACManager.runAsUser` | The user ID used by the RBAC Manager pod. | `65532` |
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| `service.customAnnotations` | Configure annotations on the service object. Only enabled when webhooks.enabled = true | `{}` |
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| `serviceAccount.create` | Specifies whether Crossplane ServiceAccount should be created | `true` |
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| `serviceAccount.customAnnotations` | Add custom `annotations` to the Crossplane ServiceAccount. | `{}` |
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| `serviceAccount.name` | Provide the name of an already created Crossplane ServiceAccount. Required when `serviceAccount.create` is `false` | `""` |
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| `tolerations` | Add `tolerations` to the Crossplane pod deployment. | `[]` |
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| `topologySpreadConstraints` | Add `topologySpreadConstraints` to the Crossplane pod deployment. | `[]` |
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| `webhooks.enabled` | Enable webhooks for Crossplane and installed Provider packages. | `true` |
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| `webhooks.port` | The port the webhook server listens on. | `""` |
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{{< /table >}}
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{{< /expand >}}
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<!-- vale gitlab.Substitutions = YES -->
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#### Command line customization
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Apply custom settings at the command line with
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`helm install crossplane --set <setting>=<value>`.
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For example, to change the image pull policy:
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```shell
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helm install crossplane \
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--namespace crossplane-system \
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--create-namespace \
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crossplane-stable/crossplane \
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--set image.pullPolicy=Always
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```
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Helm supports comma-separated arguments.
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For example, to change the image pull policy and number of replicas:
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```shell
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helm install crossplane \
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--namespace crossplane-system \
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--create-namespace \
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crossplane-stable/crossplane \
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--set image.pullPolicy=Always,replicas=2
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```
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#### Helm values file
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Apply custom settings in a Helm _values_ file with
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`helm install crossplane -f <filename>`.
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A YAML file defines the customized settings.
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For example, to change the image pull policy and number of replicas:
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Create a YAML with the customized settings.
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```yaml
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replicas: 2
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image:
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pullPolicy: Always
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```
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Apply the file with `helm install`:
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```shell
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helm install crossplane \
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--namespace crossplane-system \
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--create-namespace \
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crossplane-stable/crossplane \
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-f settings.yaml
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```
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#### Feature flags
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Crossplane introduces new features behind feature flags. By default
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alpha features are off. Crossplane enables beta features by default. To enable a
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feature flag, set the `args` value in the Helm chart. Available feature flags
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can be directly found by running `crossplane core start --help`, or by looking
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at the table below.
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{{< expand "Feature flags" >}}
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{{< table caption="Feature flags" >}}
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| Status | Flag | Description |
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| --- | --- | --- |
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| Beta | `--enable-composition-webhook-schema-validation` | Enable Composition validation using schemas. |
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| Beta | `--enable-deployment-runtime-configs` | Enable support for DeploymentRuntimeConfigs. |
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| Beta | `--enable-usages` | Enable support for Usages. |
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| Beta | `--enable-ssa-claims` | Enable support for using server-side apply to sync claims with XRs. |
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| Beta | `--enable-realtime-compositions` | Enable support for real time compositions. |
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| Alpha | `--enable-external-secret-stores` | Enable support for External Secret Stores. |
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| Alpha | `--enable-dependency-version-upgrades` | Enable automatic version upgrades of dependencies when updating packages. |
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| Alpha | `--enable-dependency-version-downgrades` | Enable automatic version downgrades of dependencies when updating packages. |
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| Alpha | `--enable-signature-verification` | Enable support for package signature verification via ImageConfig API. |
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| Alpha | `--enable-function-response-cache` | Enable support for caching composition function responses. |
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{{< /table >}}
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{{< /expand >}}
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Set these flags either in the `values.yaml` file or at install time using the
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`--set` flag, for example: `--set
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args='{"--enable-composition-functions","--enable-composition-webhook-schema-validation"}'`.
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#### Change the default package registry
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Beginning with Crossplane version 1.20.0 Crossplane uses the [crossplane-contrib](https://github.com/orgs/crossplane-contrib/packages) GitHub Container Registry at `xpkg.crossplane.io` by default for downloading and
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installing packages.
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Change the default registry location during the Crossplane install with
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`--set args='{"--registry=index.docker.io"}'`.
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### Install pre-release Crossplane versions
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Install a pre-release versions of Crossplane from the `master` Crossplane Helm channel.
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Versions in the `master` channel are under active development and may be unstable.
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{{< hint "warning" >}}
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Don't use Crossplane `master` releases in production. Only use `stable` channel.
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Only use `master` for testing and development.
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{{< /hint >}}
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#### Add the Crossplane master Helm repository
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Add the Crossplane repository with the `helm repo add` command.
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```shell
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helm repo add crossplane-master https://charts.crossplane.io/master/
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```
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Update the
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local Helm chart cache with `helm repo update`.
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```shell
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helm repo update
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```
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#### Install the Crossplane master Helm chart
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Install the Crossplane `master` Helm chart with `helm install`.
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{{< hint "tip" >}}
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View the changes Crossplane makes to your cluster with the
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`helm install --dry-run --debug` options. Helm shows what configurations it
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applies without making changes to the Kubernetes cluster.
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{{< /hint >}}
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Crossplane creates and installs into the `crossplane-system` namespace.
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```shell
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helm install crossplane \
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--namespace crossplane-system \
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--create-namespace crossplane-master/crossplane \
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--devel
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```
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## Crossplane distributions
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Third-party vendors may maintain their own Crossplane distributions. Vendor
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supported distribution may have features or tooling that isn't in the
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Community Crossplane distribution.
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The CNCF certified third-party distributions as
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"[conformant](https://github.com/cncf/crossplane-conformance)" with the
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Community Crossplane distribution.
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