karmada operator: support etcd high availability
Signed-off-by: calvin <wen.chen@daocloud.io>
This commit is contained in:
calvin
calvin0327
parent
35d6638263
commit
c3429f940f
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@ -191,6 +191,15 @@ spec:
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the built-in etcd instance Local and External are mutually
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exclusive
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properties:
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annotations:
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additionalProperties:
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type: string
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description: 'Annotations is an unstructured key value
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map stored with a resource that may be set by external
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tools to store and retrieve arbitrary metadata. They
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are not queryable and should be preserved when modifying
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objects. More info: http://kubernetes.io/docs/user-guide/annotations'
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type: object
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imageRepository:
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description: ImageRepository sets the container registry
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to pull images from. if not set, the ImageRepository
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@ -202,12 +211,77 @@ spec:
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change automatically the version of the above components
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during upgrades.
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type: string
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labels:
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additionalProperties:
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type: string
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description: 'Map of string keys and values that can be
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used to organize and categorize (scope and select) objects.
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May match selectors of replication controllers and services.
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More info: http://kubernetes.io/docs/user-guide/labels'
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type: object
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peerCertSANs:
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description: PeerCertSANs sets extra Subject Alternative
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Names for the etcd peer signing cert.
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items:
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type: string
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type: array
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replicas:
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description: Number of desired pods. This is a pointer
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to distinguish between explicit zero and not specified.
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Defaults to 1.
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format: int32
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type: integer
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resources:
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description: 'Compute Resources required by this component.
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More info: https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/'
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properties:
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claims:
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description: "Claims lists the names of resources,
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defined in spec.resourceClaims, that are used by
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this container. \n This is an alpha field and requires
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enabling the DynamicResourceAllocation feature gate.
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\n This field is immutable."
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items:
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description: ResourceClaim references one entry
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in PodSpec.ResourceClaims.
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properties:
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name:
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description: Name must match the name of one
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entry in pod.spec.resourceClaims of the Pod
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where this field is used. It makes that resource
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available inside a container.
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type: string
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required:
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- name
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type: object
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type: array
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x-kubernetes-list-map-keys:
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- name
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x-kubernetes-list-type: map
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limits:
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additionalProperties:
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anyOf:
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- type: integer
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- type: string
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pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
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x-kubernetes-int-or-string: true
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description: 'Limits describes the maximum amount
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of compute resources allowed. More info: https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/'
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type: object
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requests:
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additionalProperties:
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anyOf:
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- type: integer
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- type: string
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pattern: ^(\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))(([KMGTPE]i)|[numkMGTPE]|([eE](\+|-)?(([0-9]+(\.[0-9]*)?)|(\.[0-9]+))))?$
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x-kubernetes-int-or-string: true
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description: 'Requests describes the minimum amount
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of compute resources required. If Requests is omitted
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for a container, it defaults to Limits if that is
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explicitly specified, otherwise to an implementation-defined
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value. More info: https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/'
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type: object
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type: object
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serverCertSANs:
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description: ServerCertSANs sets extra Subject Alternative
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Names for the etcd server signing cert.
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@ -0,0 +1,33 @@
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: karmada-operator
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namespace: karmada-system
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labels:
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karmada-app: karmada-operator
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spec:
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replicas: 1
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selector:
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matchLabels:
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karmada-app: karmada-operator
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template:
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metadata:
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labels:
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karmada-app: karmada-operator
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spec:
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containers:
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- name: karmada-operator
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image: docker.io/karmada/karmada-operator:latest
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imagePullPolicy: IfNotPresent
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command:
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- /bin/karmada-operator
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- --kubeconfig=/etc/config
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- --v=4
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volumeMounts:
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- name: kubeconfig
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mountPath: /etc/config
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subPath: config
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volumes:
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- name: kubeconfig
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secret:
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secretName: my-kubeconfig
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@ -9,6 +9,7 @@ spec:
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local:
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imageRepository: registry.k8s.io/etcd
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imageTag: 3.5.3-0
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replicas: 1
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volumeData:
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emptyDir: {}
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karmadaAPIServer:
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@ -147,8 +147,8 @@ type Etcd struct {
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// LocalEtcd describes that operator should run an etcd cluster in a host cluster.
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type LocalEtcd struct {
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// ImageMeta allows to customize the container used for etcd
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Image `json:",inline"`
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// CommonSettings holds common settings to etcd.
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CommonSettings `json:",inline"`
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// VolumeData describes the settings of etcd data store.
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// We will support 3 modes: emtydir, hostPath, PVC. default by hostPath.
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@ -611,7 +611,7 @@ func (in *KubeControllerManager) DeepCopy() *KubeControllerManager {
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// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
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func (in *LocalEtcd) DeepCopyInto(out *LocalEtcd) {
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*out = *in
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out.Image = in.Image
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in.CommonSettings.DeepCopyInto(&out.CommonSettings)
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if in.VolumeData != nil {
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in, out := &in.VolumeData, &out.VolumeData
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*out = new(VolumeData)
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@ -2,13 +2,13 @@ package etcd
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import (
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"fmt"
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"strings"
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appsv1 "k8s.io/api/apps/v1"
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corev1 "k8s.io/api/core/v1"
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kuberuntime "k8s.io/apimachinery/pkg/runtime"
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clientset "k8s.io/client-go/kubernetes"
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clientsetscheme "k8s.io/client-go/kubernetes/scheme"
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"k8s.io/utils/pointer"
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operatorv1alpha1 "github.com/karmada-io/karmada/operator/pkg/apis/operator/v1alpha1"
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"github.com/karmada-io/karmada/operator/pkg/constants"
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@ -25,11 +25,29 @@ func EnsureKarmadaEtcd(client clientset.Interface, cfg *operatorv1alpha1.LocalEt
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}
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func installKarmadaEtcd(client clientset.Interface, name, namespace string, cfg *operatorv1alpha1.LocalEtcd) error {
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// if the number of etcd is greater than one, we need to concatenate the peerURL for each member cluster.
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// memberName is podName generated by etcd statefuleset: ${statefulsetName}-index
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// memberPeerURL uses the etcd peer headless service name: ${podName}.${serviceName}.${namespace}.svc.cluster.local:2380
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initialClusters := make([]string, *cfg.Replicas)
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for index := range initialClusters {
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memberName := fmt.Sprintf("%s-%d", util.KarmadaEtcdName(name), index)
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// build etcd member cluster peer url
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memberPeerURL := fmt.Sprintf("http://%s.%s.%s.svc.cluster.local:%v",
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memberName,
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util.KarmadaEtcdName(name),
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namespace,
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constants.EtcdListenPeerPort,
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)
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initialClusters[index] = fmt.Sprintf("%s=%s", memberName, memberPeerURL)
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}
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etcdStatefuleSetBytes, err := util.ParseTemplate(KarmadaEtcdStatefulSet, struct {
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StatefulSetName, Namespace, Image string
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EtcdClientService, CertsSecretName, EtcdPeerServiceName string
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Replicas *int32
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EtcdListenClientPort, EtcdListenPeerPort int32
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EtcdClientService, CertsSecretName string
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EtcdPeerServiceName, InitialCluster string
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Replicas, EtcdListenClientPort, EtcdListenPeerPort int32
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}{
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StatefulSetName: util.KarmadaEtcdName(name),
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Namespace: namespace,
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@ -37,7 +55,8 @@ func installKarmadaEtcd(client clientset.Interface, name, namespace string, cfg
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EtcdClientService: util.KarmadaEtcdClientName(name),
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CertsSecretName: util.EtcdCertSecretName(name),
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EtcdPeerServiceName: util.KarmadaEtcdName(name),
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Replicas: pointer.Int32(1),
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InitialCluster: strings.Join(initialClusters, ","),
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Replicas: *cfg.Replicas,
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EtcdListenClientPort: constants.EtcdListenClientPort,
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EtcdListenPeerPort: constants.EtcdListenPeerPort,
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})
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@ -32,11 +32,11 @@ spec:
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imagePullPolicy: IfNotPresent
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command:
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- /usr/local/bin/etcd
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- --name={{ .StatefulSetName }}0
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- --name=$(KARMADA_ETCD_NAME)
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- --listen-client-urls= https://0.0.0.0:{{ .EtcdListenClientPort }}
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- --listen-peer-urls=http://0.0.0.0:{{ .EtcdListenPeerPort }}
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- --advertise-client-urls=https://{{ .EtcdClientService }}.{{ .Namespace }}.svc.cluster.local:{{ .EtcdListenClientPort }}
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- --initial-cluster={{ .StatefulSetName }}0=http://{{ .StatefulSetName }}-0.{{ .EtcdPeerServiceName }}.{{ .Namespace }}.svc.cluster.local:{{ .EtcdListenPeerPort }}
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- --initial-cluster={{ .InitialCluster }}
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- --initial-cluster-state=new
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- --client-cert-auth=true
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- --trusted-ca-file=/etc/karmada/pki/etcd/etcd-ca.crt
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@ -45,6 +45,12 @@ spec:
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- --data-dir=/var/lib/etcd
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- --snapshot-count=10000
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- --log-level=debug
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env:
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- name: KARMADA_ETCD_NAME
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valueFrom:
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fieldRef:
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apiVersion: v1
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fieldPath: metadata.name
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livenessProbe:
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exec:
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command:
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@ -118,6 +124,8 @@ spec:
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port: {{ .EtcdListenPeerPort }}
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protocol: TCP
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targetPort: {{ .EtcdListenPeerPort }}
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selector:
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karmada-app: etcd
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type: ClusterIP
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`
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)
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@ -108,6 +108,13 @@ func NewInitJob(opt *InitOptions) *workflow.Job {
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}
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}
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if opt.Components.Etcd.Local != nil && opt.Components.Etcd.Local.CommonSettings.Replicas != nil {
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replicas := *opt.Components.Etcd.Local.CommonSettings.Replicas
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if (replicas % 2) == 0 {
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klog.Warningf("invalid etcd replicas %d, expected an odd number", replicas)
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}
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}
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// TODO: Verify whether important values of initData is valid
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return &initData{
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@ -213,10 +220,14 @@ func defaultComponents() *operatorv1alpha1.KarmadaComponents {
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return &operatorv1alpha1.KarmadaComponents{
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Etcd: &operatorv1alpha1.Etcd{
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Local: &operatorv1alpha1.LocalEtcd{
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CommonSettings: operatorv1alpha1.CommonSettings{
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Image: operatorv1alpha1.Image{
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ImageRepository: fmt.Sprintf("%s/%s", constants.KubeDefaultRepository, constants.Etcd),
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ImageTag: constants.EtcdDefaultVersion,
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},
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Replicas: pointer.Int32(1),
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},
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VolumeData: &operatorv1alpha1.VolumeData{
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EmptyDir: &corev1.EmptyDirVolumeSource{},
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},
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