deprecated-helm-charts/stable/etcd-operator

CoreOS etcd-operator

etcd-operator Simplify etcd cluster configuration and management.

DISCLAIMER: While this chart has been well-tested, the etcd-operator is still currently in beta. Current project status is available here.

Introduction

This chart bootstraps an etcd-operator and allows the deployment of etcd-cluster(s).

Official Documentation

Official project documentation found here

Prerequisites

• Kubernetes 1.4+ with Beta APIs enabled
• Suggested: PV provisioner support in the underlying infrastructure to support backups

Installing the Chart

To install the chart with the release name my-release:

$ helm install stable/etcd-operator --name my-release

Note that by default chart installs etcd operator only. If you want to also deploy etcd cluster, enable customResources.createEtcdClusterCRD flag:

$ helm install --name my-release --set customResources.createEtcdClusterCRD=true stable/etcd-operator

Uninstalling the Chart

To uninstall/delete the my-release deployment:

$ helm delete my-release

The command removes all the Kubernetes components EXCEPT the persistent volume.

Updating

Once you have a new chart version, you can update your deployment with:

$ helm upgrade my-release stable/etcd-operator

Example resizing etcd cluster from 3 to 5 nodes during helm upgrade:

$ helm upgrade my-release --set etcdCluster.size=5 --set customResources.createEtcdClusterCRD=true stable/etcd-operator

Configuration

The following table lists the configurable parameters of the etcd-operator chart and their default values.

Parameter	Description	Default
rbac.create	Install required RBAC service account, roles and rolebindings	true
rbac.apiVersion	RBAC api version v1alpha1|v1beta1	v1beta1
serviceAccount.create	Flag to create the service account	true
serviceAccount.name	Name of the service account resource when RBAC is enabled	etcd-operator-sa
deployments.etcdOperator	Deploy the etcd cluster operator	true
deployments.backupOperator	Deploy the etcd backup operator	true
deployments.restoreOperator	Deploy the etcd restore operator	true
customResources.createEtcdClusterCRD	Create a custom resource: EtcdCluster	false
customResources.createBackupCRD	Create an a custom resource: EtcdBackup	false
customResources.createRestoreCRD	Create an a custom resource: EtcdRestore	false
etcdOperator.name	Etcd Operator name	etcd-operator
etcdOperator.replicaCount	Number of operator replicas to create (only 1 is supported)	1
etcdOperator.image.repository	etcd-operator container image	quay.io/coreos/etcd-operator
etcdOperator.image.tag	etcd-operator container image tag	v0.9.3
etcdOperator.image.pullpolicy	etcd-operator container image pull policy	Always
etcdOperator.resources.cpu	CPU limit per etcd-operator pod	100m
etcdOperator.resources.memory	Memory limit per etcd-operator pod	128Mi
etcdOperator.securityContext	SecurityContext for etcd operator	{}
etcdOperator.nodeSelector	Node labels for etcd operator pod assignment	{}
etcdOperator.podAnnotations	Annotations for the etcd operator pod	{}
etcdOperator.commandArgs	Additional command arguments	{}
backupOperator.name	Backup operator name	etcd-backup-operator
backupOperator.replicaCount	Number of operator replicas to create (only 1 is supported)	1
backupOperator.image.repository	Operator container image	quay.io/coreos/etcd-operator
backupOperator.image.tag	Operator container image tag	v0.9.3
backupOperator.image.pullpolicy	Operator container image pull policy	Always
backupOperator.resources.cpu	CPU limit per etcd-operator pod	100m
backupOperator.resources.memory	Memory limit per etcd-operator pod	128Mi
backupOperator.securityContext	SecurityContext for etcd backup operator	{}
backupOperator.spec.storageType	Storage to use for backup file, currently only S3 supported	S3
backupOperator.spec.s3.s3Bucket	Bucket in S3 to store backup file
backupOperator.spec.s3.awsSecret	Name of kubernetes secret containing aws credentials
backupOperator.nodeSelector	Node labels for etcd operator pod assignment	{}
backupOperator.commandArgs	Additional command arguments	{}
restoreOperator.name	Restore operator name	etcd-backup-operator
restoreOperator.replicaCount	Number of operator replicas to create (only 1 is supported)	1
restoreOperator.image.repository	Operator container image	quay.io/coreos/etcd-operator
restoreOperator.image.tag	Operator container image tag	v0.9.3
restoreOperator.image.pullpolicy	Operator container image pull policy	Always
restoreOperator.resources.cpu	CPU limit per etcd-operator pod	100m
restoreOperator.resources.memory	Memory limit per etcd-operator pod	128Mi
restoreOperator.securityContext	SecurityContext for etcd restore operator	{}
restoreOperator.spec.s3.path	Path in S3 bucket containing the backup file
restoreOperator.spec.s3.awsSecret	Name of kubernetes secret containing aws credentials
restoreOperator.nodeSelector	Node labels for etcd operator pod assignment	{}
restoreOperator.commandArgs	Additional command arguments	{}
etcdCluster.name	etcd cluster name	etcd-cluster
etcdCluster.size	etcd cluster size	3
etcdCluster.version	etcd cluster version	3.2.25
etcdCluster.image.repository	etcd container image	quay.io/coreos/etcd-operator
etcdCluster.image.tag	etcd container image tag	v3.2.25
etcdCluster.image.pullPolicy	etcd container image pull policy	Always
etcdCluster.enableTLS	Enable use of TLS	false
etcdCluster.tls.static.member.peerSecret	Kubernetes secret containing TLS peer certs	etcd-peer-tls
etcdCluster.tls.static.member.serverSecret	Kubernetes secret containing TLS server certs	etcd-server-tls
etcdCluster.tls.static.operatorSecret	Kubernetes secret containing TLS client certs	etcd-client-tls
etcdCluster.pod.antiAffinity	Whether etcd cluster pods should have an antiAffinity	false
etcdCluster.pod.resources.limits.cpu	CPU limit per etcd cluster pod	100m
etcdCluster.pod.resources.limits.memory	Memory limit per etcd cluster pod	128Mi
etcdCluster.pod.resources.requests.cpu	CPU request per etcd cluster pod	100m
etcdCluster.pod.resources.requests.memory	Memory request per etcd cluster pod	128Mi
etcdCluster.pod.nodeSelector	Node labels for etcd cluster pod assignment	{}

Specify each parameter using the --set key=value[,key=value] argument to helm install. For example:

$ helm install --name my-release --set image.tag=v0.2.1 stable/etcd-operator

Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example:

$ helm install --name my-release --values values.yaml stable/etcd-operator

RBAC

By default the chart will install the recommended RBAC roles and rolebindings.

To determine if your cluster supports this running the following:

$ kubectl api-versions | grep rbac

You also need to have the following parameter on the api server. See the following document for how to enable RBAC

--authorization-mode=RBAC

If the output contains "beta" or both "alpha" and "beta" you can may install rbac by default, if not, you may turn RBAC off as described below.

RBAC role/rolebinding creation

RBAC resources are enabled by default. To disable RBAC do the following:

$ helm install --name my-release stable/etcd-operator --set rbac.create=false

Changing RBAC manifest apiVersion

By default the RBAC resources are generated with the "v1beta1" apiVersion. To use "v1alpha1" do the following:

$ helm install --name my-release stable/etcd-operator --set rbac.install=true,rbac.apiVersion=v1alpha1