外链推广网站都有哪些,一站式建设网站,广州自助网站搭建建站公司,wordpress主题上传rook-ceph安装部署到位后#xff0c;就可以开始来尝试使用StorageClass来动态创建pv了。
有状态的中间件在kubernetes上落地基本上都会用到StorageClass来动态创建pv#xff08;对于云上应用没有那么多烦恼#xff0c;云硬盘很好用#xff0c;但是对于自己学习和练习来说还…rook-ceph安装部署到位后就可以开始来尝试使用StorageClass来动态创建pv了。
有状态的中间件在kubernetes上落地基本上都会用到StorageClass来动态创建pv对于云上应用没有那么多烦恼云硬盘很好用但是对于自己学习和练习来说还是Ceph更加靠谱这里小试一试动态创建pv的威力为后续用它来玩转redis、zookeeper、elasticsearch做准备。
1、创建 StorageClass和存储池
kubectl create -f rook/deploy/examples/csi/rbd/storageclass.yaml
查看创建的cephblockpool和StorageClass
kubectl get cephblockpool -n rook-ceph
kubectl get sc
结果如下 rook/deploy/examples/csi/rbd/storageclass.yaml内容如下
apiVersion: ceph.rook.io/v1
kind: CephBlockPool
metadata:name: replicapoolnamespace: rook-ceph # namespace:cluster
spec:failureDomain: hostreplicated:size: 2# Disallow setting pool with replica 1, this could lead to data loss without recovery.# Make sure youre *ABSOLUTELY CERTAIN* that is what you wantrequireSafeReplicaSize: true# gives a hint (%) to Ceph in terms of expected consumption of the total cluster capacity of a given pool# for more info: https://docs.ceph.com/docs/master/rados/operations/placement-groups/#specifying-expected-pool-size#targetSizeRatio: .5
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:name: rook-ceph-block
# Change rook-ceph provisioner prefix to match the operator namespace if needed
provisioner: rook-ceph.rbd.csi.ceph.com
parameters:# clusterID is the namespace where the rook cluster is running# If you change this namespace, also change the namespace below where the secret namespaces are definedclusterID: rook-ceph # namespace:cluster# If you want to use erasure coded pool with RBD, you need to create# two pools. one erasure coded and one replicated.# You need to specify the replicated pool here in the pool parameter, it is# used for the metadata of the images.# The erasure coded pool must be set as the dataPool parameter below.#dataPool: ec-data-poolpool: replicapool# (optional) mapOptions is a comma-separated list of map options.# For krbd options refer# https://docs.ceph.com/docs/master/man/8/rbd/#kernel-rbd-krbd-options# For nbd options refer# https://docs.ceph.com/docs/master/man/8/rbd-nbd/#options# mapOptions: lock_on_read,queue_depth1024# (optional) unmapOptions is a comma-separated list of unmap options.# For krbd options refer# https://docs.ceph.com/docs/master/man/8/rbd/#kernel-rbd-krbd-options# For nbd options refer# https://docs.ceph.com/docs/master/man/8/rbd-nbd/#options# unmapOptions: force# (optional) Set it to true to encrypt each volume with encryption keys# from a key management system (KMS)# encrypted: true# (optional) Use external key management system (KMS) for encryption key by# specifying a unique ID matching a KMS ConfigMap. The ID is only used for# correlation to configmap entry.# encryptionKMSID: kms-config-id# RBD image format. Defaults to 2.imageFormat: 2# RBD image features# Available for imageFormat: 2. Older releases of CSI RBD# support only the layering feature. The Linux kernel (KRBD) supports the# full complement of features as of 5.4# layering alone corresponds to Cephs bitfield value of 2 ;# layering fast-diff object-map deep-flatten exclusive-lock together# correspond to Cephs ORd bitfield value of 63. Here we use# a symbolic, comma-separated format:# For 5.4 or later kernels:#imageFeatures: layering,fast-diff,object-map,deep-flatten,exclusive-lock# For 5.3 or earlier kernels:imageFeatures: layering# The secrets contain Ceph admin credentials. These are generated automatically by the operator# in the same namespace as the cluster.csi.storage.k8s.io/provisioner-secret-name: rook-csi-rbd-provisionercsi.storage.k8s.io/provisioner-secret-namespace: rook-ceph # namespace:clustercsi.storage.k8s.io/controller-expand-secret-name: rook-csi-rbd-provisionercsi.storage.k8s.io/controller-expand-secret-namespace: rook-ceph # namespace:clustercsi.storage.k8s.io/node-stage-secret-name: rook-csi-rbd-nodecsi.storage.k8s.io/node-stage-secret-namespace: rook-ceph # namespace:cluster# Specify the filesystem type of the volume. If not specified, csi-provisioner# will set default as ext4. Note that xfs is not recommended due to potential deadlock# in hyperconverged settings where the volume is mounted on the same node as the osds.csi.storage.k8s.io/fstype: ext4
# uncomment the following to use rbd-nbd as mounter on supported nodes
# **IMPORTANT**: CephCSI v3.4.0 onwards a volume healer functionality is added to reattach
# the PVC to application pod if nodeplugin pod restart.
# Its still in Alpha support. Therefore, this option is not recommended for production use.
#mounter: rbd-nbd
allowVolumeExpansion: true
reclaimPolicy: Delete
2、创nginx的StatefulSet通过storageclass来动态创建pv绑定到 /usr/share/nginx/html 有状态的Pod,每个Pod都要有自己的pv。 对于redis、zookeeper、elasticsearch来说都会使用到storageClass来动态创建pv。 kubectl apply -f test_volumnClainTemplates.yaml 查看命令如下
kubectl get po -l appnginx
kubectl get pvc 结果如下 test_volumnClainTemplates.yaml的内容如下
apiVersion: v1
kind: Service
metadata:name: nginxlabels:app: nginx
spec:ports:- port: 80name: webclusterIP: Noneselector:app: nginx
---
apiVersion: apps/v1
kind: StatefulSet
metadata:name: web
spec:selector:matchLabels:app: nginxserviceName: nginxreplicas: 2 template:metadata: labels:app: nginxspec:terminationGracePeriodSeconds: 10 containers:- name: nginx image: nginx ports:- containerPort: 80 name: webvolumeMounts:- name: wwwmountPath: /usr/share/nginx/htmlvolumeClaimTemplates:- metadata:name: www spec:accessModes: [ ReadWriteOnce ] storageClassName: rook-ceph-blockresources:requests:storage: 200M
