Documentation

    PLEASE NOTE: This document applies to v1.0 version and not to the latest stable release v1.1

    Documentation for other releases can be found by using the version selector in the left bottom of any doc page.

    Ceph Operator Helm Chart

    Installs rook to create, configure, and manage Ceph clusters on Kubernetes.

    Introduction

    This chart bootstraps a rook-ceph-operator deployment on a Kubernetes cluster using the Helm package manager.

    Prerequisites

    • Kubernetes 1.10+

    RBAC

    If role-based access control (RBAC) is enabled in your cluster, you may need to give Tiller (the server-side component of Helm) additional permissions. If RBAC is not enabled, be sure to set rbacEnable to false when installing the chart.

    # Create a ServiceAccount for Tiller in the `kube-system` namespace
    kubectl --namespace kube-system create sa tiller
    
    # Create a ClusterRoleBinding for Tiller
    kubectl create clusterrolebinding tiller --clusterrole cluster-admin --serviceaccount=kube-system:tiller
    
    # Patch Tiller's Deployment to use the new ServiceAccount
    kubectl --namespace kube-system patch deploy/tiller-deploy -p '{"spec": {"template": {"spec": {"serviceAccountName": "tiller"}}}}'
    

    Installing

    The Ceph Operator helm chart will install the basic components necessary to create a storage platform for your Kubernetes cluster. After the helm chart is installed, you will need to create a Rook cluster.

    The helm install command deploys rook on the Kubernetes cluster in the default configuration. The configuration section lists the parameters that can be configured during installation. It is recommended that the rook operator be installed into the rook-ceph namespace (you will install your clusters into separate namespaces).

    Rook currently publishes builds of the Ceph operator to the release and master channels.

    Release

    The release channel is the most recent release of Rook that is considered stable for the community.

    helm repo add rook-release https://charts.rook.io/release
    helm install --namespace rook-ceph rook-release/rook-ceph
    

    Master

    The master channel includes the latest commits, with all automated tests green. Historically it has been very stable, though it is only recommended for testing. The critical point to consider is that upgrades are not supported to or from master builds.

    To install the helm chart from master, you will need to pass the specific version returned by the search command.

    helm repo add rook-master https://charts.rook.io/master
    helm search rook-ceph
    helm install --namespace rook-ceph rook-master/rook-ceph --version <version>
    

    For example:

    helm install --namespace rook-ceph rook-master/rook-ceph --version v0.9.0-563.g242e032
    

    Development Build

    To deploy from a local build from your development environment:

    1. Build the Rook docker image: make
    2. Copy the image to your K8s cluster, such as with the docker save then the docker load commands
    3. Install the helm chart
      cd cluster/charts/rook-ceph
      helm install --namespace rook-ceph --name rook-ceph .
      

    Uninstalling the Chart

    To uninstall/delete the rook-ceph deployment:

    $ helm delete --purge rook-ceph
    

    The command removes all the Kubernetes components associated with the chart and deletes the release.

    Configuration

    The following tables lists the configurable parameters of the rook-operator chart and their default values.

    Parameter Description Default
    image.repository Image rook/ceph
    image.tag Image tag master
    image.pullPolicy Image pull policy IfNotPresent
    rbacEnable If true, create & use RBAC resources true
    pspEnable If true, create & use PSP resources true
    resources Pod resource requests & limits {}
    annotations Pod annotations {}
    logLevel Global log level INFO
    nodeSelector Kubernetes nodeSelector to add to the Deployment.
    tolerations List of Kubernetes tolerations to add to the Deployment. []
    hostpathRequiresPrivileged Runs Ceph Pods as privileged to be able to write to hostPaths in OpenShift with SELinux restrictions. false
    agent.flexVolumeDirPath Path where the Rook agent discovers the flex volume plugins (*) /usr/libexec/kubernetes/kubelet-plugins/volume/exec/
    agent.libModulesDirPath Path where the Rook agent should look for kernel modules (*) /lib/modules
    agent.mounts Additional paths to be mounted in the agent container
    agent.mountSecurityMode Mount Security Mode for the agent. Any
    agent.toleration Toleration for the agent pods
    agent.tolerationKey The specific key of the taint to tolerate
    discover.toleration Toleration for the discover pods
    discover.tolerationKey The specific key of the taint to tolerate
    mon.healthCheckInterval The frequency for the operator to check the mon health 45s
    mon.monOutTimeout The time to wait before failing over an unhealthy mon 600s

    &ast; For information on what to set agent.flexVolumeDirPath to, please refer to the Rook flexvolume documentation &ast; agent.mounts should have this format mountname1=/host/path:/container/path,mountname2=/host/path2:/container/path2

    Command Line

    You can pass the settings with helm command line parameters. Specify each parameter using the --set key=value[,key=value] argument to helm install. For example, the following command will install rook where RBAC is not enabled.

    $ helm install --namespace rook-ceph --name rook-ceph rook-release/rook-ceph --set rbacEnable=false
    

    Settings File

    Alternatively, a yaml file that specifies the values for the above parameters (values.yaml) can be provided while installing the chart.

    $ helm install --namespace rook-ceph --name rook-ceph rook-release/rook-ceph -f values.yaml
    

    Here are the sample settings to get you started.

    image:
      prefix: rook
      repository: rook/ceph
      tag: v1.0.0
      pullPolicy: IfNotPresent
    
    resources:
      limits:
        cpu: 100m
        memory: 128Mi
      requests:
        cpu: 100m
        memory: 128Mi
    
    rbacEnable: true
    pspEnable: true