using OpenEBS for persistent volume
Jimmy Song
parent
5ce0b97032
commit
50778c50ef
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@ -118,6 +118,8 @@
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- [在OpenShift中使用GlusterFS做持久化存储](practice/storage-for-containers-using-glusterfs-with-openshift.md)
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- [在OpenShift中使用GlusterFS做持久化存储](practice/storage-for-containers-using-glusterfs-with-openshift.md)
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- [CephFS](practice/cephfs.md)
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- [CephFS](practice/cephfs.md)
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- [使用Ceph做持久化存储](practice/using-ceph-for-persistent-storage.md)
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- [使用Ceph做持久化存储](practice/using-ceph-for-persistent-storage.md)
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- [OpenEBS](practice/openebs.md)
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- [使用OpenEBS做持久化存储](practice/using-openebs-for-persistent-storage.md)
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- [集群与应用监控](practice/monitoring.md)
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- [集群与应用监控](practice/monitoring.md)
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- [Heapster](practice//heapster.md)
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- [Heapster](practice//heapster.md)
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- [使用Heapster获取集群和对象的metric数据](practice/using-heapster-to-get-object-metrics.md)
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- [使用Heapster获取集群和对象的metric数据](practice/using-heapster-to-get-object-metrics.md)
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After Width: | Height: | Size: 18 KiB |
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kind: PersistentVolumeClaim
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apiVersion: v1
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metadata:
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name: jenkins-claim
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annotations:
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volume.beta.kubernetes.io/storage-class: openebs-standard
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spec:
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 5G
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---
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apiVersion: extensions/v1beta1
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kind: Deployment
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metadata:
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name: jenkins
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spec:
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replicas: 1
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template:
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metadata:
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labels:
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app: jenkins-app
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spec:
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securityContext:
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fsGroup: 1000
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containers:
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- name: jenkins
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imagePullPolicy: IfNotPresent
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image: sz-pg-oam-docker-hub-001.tendcloud.com/library/jenkins:lts
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ports:
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- containerPort: 8080
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volumeMounts:
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- mountPath: /var/jenkins_home
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name: jenkins-home
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volumes:
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- name: jenkins-home
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persistentVolumeClaim:
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claimName: jenkins-claim
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: jenkins-svc
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spec:
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ports:
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- port: 80
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targetPort: 8080
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selector:
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app: jenkins-app
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type: NodePort
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# Define the Service Account
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# Define the RBAC rules for the Service Account
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# Launch the maya-apiserver ( deployment )
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# Launch the maya-storagemanager ( deameon set )
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# Create Maya Service Account
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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: openebs-maya-operator
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namespace: default
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---
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# Define Role that allows operations on K8s pods/deployments
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# in "default" namespace
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# TODO : change to new namespace, for isolated data network
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# TODO : the rules should be updated with required group/resources/verb
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kind: ClusterRole
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apiVersion: rbac.authorization.k8s.io/v1beta1
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metadata:
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namespace: default
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name: openebs-maya-operator
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rules:
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- apiGroups: ["*"]
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resources: ["nodes","nodes/proxy"]
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verbs: ["get", "list", "watch"]
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- apiGroups: ["*"]
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resources: ["services","pods","deployments", "events", "endpoints"]
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verbs: ["*"]
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- apiGroups: ["*"]
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resources: ["persistentvolumes","persistentvolumeclaims"]
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verbs: ["*"]
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- apiGroups: ["storage.k8s.io"]
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resources: ["storageclasses"]
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verbs: ["*"]
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- nonResourceURLs: ["/metrics"]
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verbs: ["get"]
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---
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# Bind the Service Account with the Role Privileges.
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# TODO: Check if default account also needs to be there
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kind: ClusterRoleBinding
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apiVersion: rbac.authorization.k8s.io/v1beta1
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metadata:
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name: openebs-maya-operator
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namespace: default
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subjects:
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- kind: ServiceAccount
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name: openebs-maya-operator
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namespace: default
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- kind: User
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name: system:serviceaccount:default:default
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apiGroup: rbac.authorization.k8s.io
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roleRef:
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kind: ClusterRole
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name: openebs-maya-operator
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apiGroup: rbac.authorization.k8s.io
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---
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apiVersion: apps/v1beta1
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kind: Deployment
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metadata:
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name: maya-apiserver
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namespace: default
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spec:
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replicas: 1
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template:
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metadata:
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labels:
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name: maya-apiserver
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spec:
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serviceAccountName: openebs-maya-operator
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containers:
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- name: maya-apiserver
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imagePullPolicy: Always
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image: sz-pg-oam-docker-hub-001.tendcloud.com/library/openebs-m-apiserver:0.5.1-RC1
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ports:
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- containerPort: 5656
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env:
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- name: OPENEBS_IO_JIVA_CONTROLLER_IMAGE
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value: "sz-pg-oam-docker-hub-001.tendcloud.com/library/openebs-jiva:0.5.1-RC1"
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- name: OPENEBS_IO_JIVA_REPLICA_IMAGE
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value: "sz-pg-oam-docker-hub-001.tendcloud.com/library/openebs-jiva:0.5.1-RC1"
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- name: OPENEBS_IO_VOLUME_MONITOR_IMAGE
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value: "sz-pg-oam-docker-hub-001.tendcloud.com/library/openebs-m-exporter:0.5.0"
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- name: OPENEBS_IO_JIVA_REPLICA_COUNT
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value: "2"
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: maya-apiserver-service
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spec:
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ports:
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- name: api
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port: 5656
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protocol: TCP
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targetPort: 5656
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selector:
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name: maya-apiserver
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sessionAffinity: None
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---
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apiVersion: apps/v1beta1
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kind: Deployment
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metadata:
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name: openebs-provisioner
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namespace: default
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spec:
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replicas: 1
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template:
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metadata:
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labels:
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name: openebs-provisioner
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spec:
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serviceAccountName: openebs-maya-operator
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containers:
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- name: openebs-provisioner
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imagePullPolicy: Always
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image: sz-pg-oam-docker-hub-001.tendcloud.com/library/openebs-k8s-provisioner:0.5.1-RC2
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env:
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- name: NODE_NAME
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valueFrom:
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fieldRef:
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fieldPath: spec.nodeName
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- name: OPENEBS_MONITOR_URL
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value: "http://127.0.0.1:32515/dashboard/db/openebs-volume-stats?orgId=1"
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- name: OPENEBS_MONITOR_VOLKEY
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value: "&var-OpenEBS"
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- name: MAYA_PORTAL_URL
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value: "https://mayaonline.io/"
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---
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apiVersion: apiextensions.k8s.io/v1beta1
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kind: CustomResourceDefinition
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metadata:
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# name must match the spec fields below, and be in the form: <plural>.<group>
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name: storagepoolclaims.openebs.io
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spec:
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# group name to use for REST API: /apis/<group>/<version>
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group: openebs.io
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# version name to use for REST API: /apis/<group>/<version>
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version: v1alpha1
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# either Namespaced or Cluster
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scope: Cluster
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names:
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# plural name to be used in the URL: /apis/<group>/<version>/<plural>
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plural: storagepoolclaims
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# singular name to be used as an alias on the CLI and for display
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singular: storagepoolclaim
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# kind is normally the CamelCased singular type. Your resource manifests use this.
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kind: StoragePoolClaim
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# shortNames allow shorter string to match your resource on the CLI
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shortNames:
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- spc
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---
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apiVersion: apiextensions.k8s.io/v1beta1
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kind: CustomResourceDefinition
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metadata:
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# name must match the spec fields below, and be in the form: <plural>.<group>
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name: storagepools.openebs.io
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spec:
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# group name to use for REST API: /apis/<group>/<version>
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group: openebs.io
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# version name to use for REST API: /apis/<group>/<version>
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version: v1alpha1
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# either Namespaced or Cluster
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scope: Cluster
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names:
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# plural name to be used in the URL: /apis/<group>/<version>/<plural>
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plural: storagepools
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# singular name to be used as an alias on the CLI and for display
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singular: storagepool
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# kind is normally the CamelCased singular type. Your resource manifests use this.
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kind: StoragePool
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# shortNames allow shorter string to match your resource on the CLI
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shortNames:
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- sp
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-standard
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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# Define a storage classes supported by OpenEBS
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-standalone
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "1"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-percona
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "1"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-jupyter
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-mongodb
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-cassandra
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-redis
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-kafka
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 10G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-zk
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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apiVersion: storage.k8s.io/v1
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kind: StorageClass
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metadata:
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name: openebs-es-data-sc
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provisioner: openebs.io/provisioner-iscsi
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parameters:
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openebs.io/storage-pool: "default"
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openebs.io/jiva-replica-count: "2"
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openebs.io/volume-monitor: "true"
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openebs.io/capacity: 5G
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---
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@ -0,0 +1,5 @@
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# OpenEBS
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[OpenEBS](https://github.com/openebs/openebs)是一款使用Go语言编写的基于容器的快存储开源块存储软件。OpenEBS使得在容器中运行关键性任务和需要数据持久化的负载变得更可靠。
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我们知道AWS中提供了[EBS](https://amazonaws-china.com/cn/ebs/)（Elastic Block Storage），适用于 Amazon EC2 的持久性块存储，可以满足要求最苛刻的应用程序在功能和性能方面的要求，OpenEBS即其开源实现。
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@ -0,0 +1,106 @@
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# 使用OpenEBS做持久化存储
|
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|
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本文将指导您如何在Kubernetes集群上安装[OpenEBS](https://github.com/openebs/openebs)作为持久化存储。
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||||||
|
我们将使用[Operator](https://coreos.com/operators/)的方式来安装OpenEBS，安装之前需要先确认您的节点上已经安装了iSCSI。
|
||||||
|
|
||||||
|
## 先决条件
|
||||||
|
|
||||||
|
OpenEBS依赖与iSCSI做存储管理，因此需要先确保您的集群上已有安装OpenEBS。
|
||||||
|
|
||||||
|
**注意**：如果您使用kubeadm，容器方式安装的kublet，那么其中会自带iSCSI，不需要再手动安装，如果是直接使用二进制形式在裸机上安装的kubelet，则需要自己安装iSCSI。
|
||||||
|
|
||||||
|
iSCSI( Internet Small Computer System Interface 互联网小型计算机系统接口)是一种基于TCP/IP 的协议，用来建立和管理IP存储设备、主机和客户机等之间的相互连接，并创建存储区域网络（SAN）。SAN 使得SCSI 协议应用于高速数据传输网络成为可能，这种传输以数据块级别（block-level）在多个数据存储网络间进行。SCSI 结构基于C/S模式，其通常应用环境是：设备互相靠近，并且这些设备由SCSI 总线连接。
|
||||||
|
|
||||||
|
OpenEBS需要使用iSCSI作为存储协议，而CentOS上默认是没有安装该软件的，因此我们需要手动安装。
|
||||||
|
|
||||||
|
iSCSI中包括两种类型的角色：
|
||||||
|
|
||||||
|
- **target**：用来提供存储（server）
|
||||||
|
- **initiator**：使用存储的客户端（client）
|
||||||
|
|
||||||
|
下图在Kubernetes中使用iSCSI的架构图（图片来源：http://rootfs.github.io/iSCSI-Kubernetes/）。
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
安装iSCSI服务十分简单，不需要额外的配置，只要安装后启动服务即可。
|
||||||
|
|
||||||
|
在每个node节点上执行下面的命令：
|
||||||
|
|
||||||
|
```bash
|
||||||
|
yum -y install iscsi-initiator-utils
|
||||||
|
systemctl enable iscsid
|
||||||
|
systemctl start iscsid
|
||||||
|
```
|
||||||
|
|
||||||
|
## 快速开始
|
||||||
|
|
||||||
|
使用Operator运行OpenEBS服务：
|
||||||
|
|
||||||
|
```bash
|
||||||
|
wget https://raw.githubusercontent.com/openebs/openebs/master/k8s/openebs-operator.yaml
|
||||||
|
kubectl apply -f openebs-operator.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
使用默认或自定义的storageclass：
|
||||||
|
|
||||||
|
```bash
|
||||||
|
wget https://raw.githubusercontent.com/openebs/openebs/master/k8s/openebs-storageclasses.yaml
|
||||||
|
kubectl apply -f openebs-storageclasses.yaml
|
||||||
|
```
|
||||||
|
|
||||||
|
用到的镜像有：
|
||||||
|
|
||||||
|
- openebs/m-apiserver:0.5.1-RC1
|
||||||
|
- openebs/openebs-k8s-provisioner:0.5.1-RC2
|
||||||
|
- openebs/jiva:0.5.1-RC1
|
||||||
|
- openebs/m-exporter:0.5.0
|
||||||
|
|
||||||
|
## 测试
|
||||||
|
|
||||||
|
下面使用OpenEBS官方文档中的[示例]()，安装Jenkins测试
|
||||||
|
|
||||||
|
```bash
|
||||||
|
wget https://raw.githubusercontent.com/openebs/openebs/master/k8s/demo/jenkins/jenkins.yml
|
||||||
|
kubectl apply -f jenkins.yml
|
||||||
|
```
|
||||||
|
|
||||||
|
查看PV和PVC
|
||||||
|
|
||||||
|
```bash
|
||||||
|
$ kubectl get pv
|
||||||
|
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
|
||||||
|
pvc-8e203e86-f1e5-11e7-aa47-f4e9d49f8ed0 5G RWO Delete Bound default/jenkins-claim openebs-standard 1h
|
||||||
|
|
||||||
|
$ kubectl get pvc
|
||||||
|
kubectl get pvc
|
||||||
|
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
|
||||||
|
jenkins-claim Bound pvc-8e203e86-f1e5-11e7-aa47-f4e9d49f8ed0 5G RWO openebs-standard 1h
|
||||||
|
```
|
||||||
|
|
||||||
|
查看Jenkins pod
|
||||||
|
|
||||||
|
```bash
|
||||||
|
Events:
|
||||||
|
Type Reason Age From Message
|
||||||
|
---- ------ ---- ---- -------
|
||||||
|
Warning FailedScheduling 29m (x2 over 29m) default-scheduler PersistentVolumeClaim is not bound: "jenkins-claim" (repeated 3 times)
|
||||||
|
Normal Scheduled 29m default-scheduler Successfully assigned jenkins-668dfbd847-vhg4c to 172.20.0.115
|
||||||
|
Normal SuccessfulMountVolume 29m kubelet, 172.20.0.115 MountVolume.SetUp succeeded for volume "default-token-3l9f0"
|
||||||
|
Warning FailedMount 27m kubelet, 172.20.0.115 Unable to mount volumes for pod "jenkins-668dfbd847-vhg4c_default(8e2ad467-f1e5-11e7-aa47-f4e9d49f8ed0)": timeout expired waiting for volumes to attach/mount for pod "default"/"jenkins-668dfbd847-vhg4c". list of unattached/unmounted volumes=[jenkins-home]
|
||||||
|
Warning FailedSync 27m kubelet, 172.20.0.115 Error syncing pod
|
||||||
|
Normal SuccessfulMountVolume 26m kubelet, 172.20.0.115 MountVolume.SetUp succeeded for volume "pvc-8e203e86-f1e5-11e7-aa47-f4e9d49f8ed0"
|
||||||
|
Normal Pulling 26m kubelet, 172.20.0.115 pulling image "sz-pg-oam-docker-hub-001.tendcloud.com/library/jenkins:lts"
|
||||||
|
Normal Pulled 26m kubelet, 172.20.0.115 Successfully pulled image "sz-pg-oam-docker-hub-001.tendcloud.com/library/jenkins:lts"
|
||||||
|
Normal Created 26m kubelet, 172.20.0.115 Created container
|
||||||
|
Normal Started 26m kubelet, 172.20.0.115 Started container
|
||||||
|
```
|
||||||
|
|
||||||
|
启动成功。Jenkins配置使用的是**NodePort**方式访问，现在访问集群中任何一个节点的Jenkins service的NodePort即可。
|
||||||
|
|
||||||
|
## 参考
|
||||||
|
|
||||||
|
- [OpenEBS Documentation](http://openebs.readthedocs.io/)
|
||||||
|
- [CentOS 7.x 下配置iSCSI网络存储](http://blog.csdn.net/wh211212/article/details/52981305)
|
||||||
|
- [Configure iSCSI Initiator](https://www.server-world.info/en/note?os=CentOS_7&p=iscsi&f=2)
|
||||||
|
- [RHEL7: Configure a system as either an iSCSI target or initiator that persistently mounts an iSCSI target.](https://www.certdepot.net/rhel7-configure-iscsi-target-initiator-persistently/)
|
||||||
Loading…
Reference in New Issue