附013.Kubernetes永久存储Rook部署

2019/04/10 10:10
阅读数 53

一 Rook概述

1.1 Ceph简介

Ceph是一种高度可扩展的分布式存储解决方案,提供对象、文件和块存储。在每个存储节点上,将找到Ceph存储对象的文件系统和Ceph OSD(对象存储守护程序)进程。在Ceph集群上,还存在Ceph MON(监控)守护程序,它们确保Ceph集群保持高可用性。
更多Ceph介绍参考:https://www.cnblogs.com/itzgr/category/1382602.html

1.2 Rook简介

Rook 是一个开源的cloud-native storage编排, 提供平台和框架;为各种存储解决方案提供平台、框架和支持,以便与云原生环境本地集成。目前主要专用于Cloud-Native环境的文件、块、对象存储服务。它实现了一个自我管理的、自我扩容的、自我修复的分布式存储服务。
Rook支持自动部署、启动、配置、分配(provisioning)、扩容/缩容、升级、迁移、灾难恢复、监控,以及资源管理。为了实现所有这些功能,Rook依赖底层的容器编排平台,例如 kubernetes、CoreOS 等。。
Rook 目前支持Ceph、NFS、Minio Object Store、Edegefs、Cassandra、CockroachDB 存储的搭建。
Rook机制:
  • Rook 提供了卷插件,来扩展了 K8S 的存储系统,使用 Kubelet 代理程序 Pod 可以挂载 Rook 管理的块设备和文件系统。
  • Rook Operator 负责启动并监控整个底层存储系统,例如 Ceph Pod、Ceph OSD 等,同时它还管理 CRD、对象存储、文件系统。
  • Rook Agent 代理部署在 K8S 每个节点上以 Pod 容器运行,每个代理 Pod 都配置一个 Flexvolume 驱动,该驱动主要用来跟 K8S 的卷控制框架集成起来,每个节点上的相关的操作,例如添加存储设备、挂载、格式化、删除存储等操作,都有该代理来完成。
更多参考如下官网:
https://rook.io
https://ceph.com/

1.3 Rook架构

Rook架构如下:
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Kubernetes集成Rook架构如下:
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二 Rook部署

2.1 前期规划

提示:本实验不涉及Kubernetes部署,Kubernetes部署参考《附012.Kubeadm部署高可用Kubernetes》。
主机
IP
磁盘
备注
k8smaster01
172.24.8.71
Kubernetes master节点
k8smaster02
172.24.8.72
Kubernetes master节点
k8smaster03
172.24.8.73
Kubernetes master节点
k8snode01
172.24.8.74
sdb
Kubernetes node节点
Ceph节点
k8snode02
172.24.8.75
sdb
Kubernetes node节点
Ceph节点
k8snode03
172.24.8.76
sdb
Kubernetes node节点
Ceph节点
裸磁盘规划
k8snode01
k8snode02
k8snode03
Disk
sdb
sdb
sdb

2.2 获取YAML

[root@k8smaster01 ~]# git clone https://github.com/rook/rook.git

2.3 部署Rook Operator

本实验使用k8snode01——k8snode03三个节点,因此需要如下修改:
[root@k8smaster01 ceph]# kubectl taint node k8smaster01 node-role.kubernetes.io/master="":NoSchedule
[root@k8smaster01 ceph]# kubectl taint node k8smaster02 node-role.kubernetes.io/master="":NoSchedule
[root@k8smaster01 ceph]# kubectl taint node k8smaster03 node-role.kubernetes.io/master="":NoSchedule
[root@k8smaster01 ceph]# kubectl label nodes {k8snode01,k8snode02,k8snode03} ceph-osd=enabled
[root@k8smaster01 ceph]# kubectl label nodes {k8snode01,k8snode02,k8snode03} ceph-mon=enabled
[root@k8smaster01 ceph]# kubectl label nodes k8snode01 ceph-mgr=enabled
提示:当前版本rook中mgr只能支持一个节点运行。

[root@k8smaster01 ~]# cd /root/rook/cluster/examples/kubernetes/ceph/
[root@k8smaster01 ceph]# kubectl create -f common.yaml
[root@k8smaster01 ceph]# kubectl create -f operator.yaml
解读:如上创建了相应的基础服务(如serviceaccounts),同时rook-ceph-operator会在每个节点创建 rook-ceph-agent 和 rook-discover。

2.4 配置cluster

[root@k8smaster01 ceph]# vi cluster.yaml
  1 apiVersion: ceph.rook.io/v1
  2 kind: CephCluster
  3 metadata:
  4   name: rook-ceph
  5   namespace: rook-ceph
  6 spec:
  7   cephVersion:
  8     image: ceph/ceph:v14.2.4-20190917
  9     allowUnsupported: false
 10   dataDirHostPath: /var/lib/rook
 11   skipUpgradeChecks: false
 12   mon:
 13     count: 3
 14     allowMultiplePerNode: false
 15   dashboard:
 16     enabled: true
 17     ssl: true
 18   monitoring:
 19     enabled: false
 20     rulesNamespace: rook-ceph
 21   network:
 22     hostNetwork: false
 23   rbdMirroring:
 24     workers: 0
 25   placement:				#配置特定节点亲和力保证Node作为存储节点
 26 #    all:
 27 #      nodeAffinity:
 28 #        requiredDuringSchedulingIgnoredDuringExecution:
 29 #          nodeSelectorTerms:
 30 #          - matchExpressions:
 31 #            - key: role
 32 #              operator: In
 33 #              values:
 34 #              - storage-node
 35 #      tolerations:
 36 #      - key: storage-node
 37 #        operator: Exists
 38     mon:
 39       nodeAffinity:
 40         requiredDuringSchedulingIgnoredDuringExecution:
 41           nodeSelectorTerms:
 42           - matchExpressions:
 43             - key: ceph-mon
 44               operator: In
 45               values:
 46               - enabled
 47       tolerations:
 48       - key: ceph-mon
 49         operator: Exists
 50     ods:
 51       nodeAffinity:
 52         requiredDuringSchedulingIgnoredDuringExecution:
 53           nodeSelectorTerms:
 54           - matchExpressions:
 55             - key: ceph-osd
 56               operator: In
 57               values:
 58               - enabled
 59       tolerations:
 60       - key: ceph-osd
 61         operator: Exists
 62     mgr:
 63       nodeAffinity:
 64         requiredDuringSchedulingIgnoredDuringExecution:
 65           nodeSelectorTerms:
 66           - matchExpressions:
 67             - key: ceph-mgr
 68               operator: In
 69               values:
 70               - enabled
 71       tolerations:
 72       - key: ceph-mgr
 73         operator: Exists
 74   annotations:
 75   resources:
 76   removeOSDsIfOutAndSafeToRemove: false
 77   storage:
 78     useAllNodes: false			#关闭使用所有Node
 79     useAllDevices: false		#关闭使用所有设备
 80     deviceFilter: sdb
 81     config:
 82         metadataDevice:
 83         databaseSizeMB: "1024"
 84         journalSizeMB: "1024"
 85     nodes:
 86     - name: "k8snode01"			#指定存储节点主机
 87       config:
 88         storeType: bluestore	#指定类型为裸磁盘
 89       devices:
 90       - name: "sdb"			    #指定磁盘为sdb
 91     - name: "k8snode02"
 92       config:
 93         storeType: bluestore
 94       devices:
 95       - name: "sdb"
 96     - name: "k8snode03"
 97       config:
 98         storeType: bluestore
 99       devices:
100       - name: "sdb"
101   disruptionManagement:
102     managePodBudgets: false
103     osdMaintenanceTimeout: 30
104     manageMachineDisruptionBudgets: false
105     machineDisruptionBudgetNamespace: openshift-machine-api
提示:更多cluster的CRD配置参考:https://github.com/rook/rook/blob/master/Documentation/ceph-cluster-crd.md。
https://blog.gmem.cc/rook-based-k8s-storage-solution

2.5 获取镜像

可能由于国内环境无法Pull镜像,建议提前pull如下镜像:
docker pull rook/ceph:master
docker pull quay.azk8s.cn/cephcsi/cephcsi:v1.2.2
docker pull quay.azk8s.cn/k8scsi/csi-node-driver-registrar:v1.1.0
docker pull quay.azk8s.cn/k8scsi/csi-provisioner:v1.4.0
docker pull quay.azk8s.cn/k8scsi/csi-attacher:v1.2.0
docker pull quay.azk8s.cn/k8scsi/csi-snapshotter:v1.2.2

docker tag quay.azk8s.cn/cephcsi/cephcsi:v1.2.2 quay.io/cephcsi/cephcsi:v1.2.2
docker tag quay.azk8s.cn/k8scsi/csi-node-driver-registrar:v1.1.0 quay.io/k8scsi/csi-node-driver-registrar:v1.1.0
docker tag quay.azk8s.cn/k8scsi/csi-provisioner:v1.4.0 quay.io/k8scsi/csi-provisioner:v1.4.0
docker tag quay.azk8s.cn/k8scsi/csi-attacher:v1.2.0 quay.io/k8scsi/csi-attacher:v1.2.0
docker tag quay.azk8s.cn/k8scsi/csi-snapshotter:v1.2.2 quay.io/k8scsi/csi-snapshotter:v1.2.2


docker rmi quay.azk8s.cn/cephcsi/cephcsi:v1.2.2
docker rmi quay.azk8s.cn/k8scsi/csi-node-driver-registrar:v1.1.0
docker rmi quay.azk8s.cn/k8scsi/csi-provisioner:v1.4.0
docker rmi quay.azk8s.cn/k8scsi/csi-attacher:v1.2.0
docker rmi quay.azk8s.cn/k8scsi/csi-snapshotter:v1.2.2

2.6 部署cluster

[root@k8smaster01 ceph]# kubectl create -f cluster.yaml
[root@k8smaster01 ceph]# kubectl logs -f -n rook-ceph rook-ceph-operator-cb47c46bc-pszfh #可查看部署log
[root@k8smaster01 ceph]# kubectl get pods -n rook-ceph -o wide #需要等待一定时间,部分中间态容器可能会波动
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提示:若部署失败,master节点执行[root@k8smaster01 ceph]# kubectl delete -f ./
所有node节点执行如下清理操作:
rm -rf /var/lib/rook
/dev/mapper/ceph-*
dmsetup ls
dmsetup remove_all
dd if=/dev/zero of=/dev/sdb bs=512k count=1
wipefs -af /dev/sdb

2.7 部署Toolbox

toolbox是一个rook的工具集容器,该容器中的命令可以用来调试、测试Rook,对Ceph临时测试的操作一般在这个容器内执行。
[root@k8smaster01 ceph]# kubectl create -f toolbox.yaml
[root@k8smaster01 ceph]# kubectl -n rook-ceph get pod -l "app=rook-ceph-tools"
NAME READY STATUS RESTARTS AGE
rook-ceph-tools-59b8cccb95-9rl5l 1/1 Running 0 15s

2.8 测试Rook

[root@k8smaster01 ceph]# kubectl -n rook-ceph exec -it $(kubectl -n rook-ceph get pod -l "app=rook-ceph-tools" -o jsonpath='{.items[0].metadata.name}') bash
[root@rook-ceph-tools-59b8cccb95-9rl5l /]# ceph status #查看Ceph状态
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[root@rook-ceph-tools-59b8cccb95-9rl5l /]# ceph osd status
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[root@rook-ceph-tools-59b8cccb95-9rl5l /]# ceph df
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[root@rook-ceph-tools-59b8cccb95-9rl5l /]# rados df
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[root@rook-ceph-tools-59b8cccb95-9rl5l /]# ceph auth ls #查看Ceph所有keyring
[root@rook-ceph-tools-59b8cccb95-9rl5l /]# ceph version
ceph version 14.2.4 (75f4de193b3ea58512f204623e6c5a16e6c1e1ba) nautilus (stable)
提示:更多Ceph管理参考《008.RHCS-管理Ceph存储集群》,如上工具中也支持使用独立的ceph命令ceph osd pool create ceph-test 512创建相关pool,实际Kubernetes rook中,不建议直接操作底层Ceph,以防止上层Kubernetes而言数据不一致性。

2.10 复制key和config

为方便管理,可将Ceph的keyring和config在master节点也创建一份,从而实现在Kubernetes外部宿主机对rook Ceph集群的简单查看。
[root@k8smaster01 ~]# kubectl -n rook-ceph exec -it $(kubectl -n rook-ceph get pod -l "app=rook-ceph-tools" -o jsonpath='{.items[0].metadata.name}') cat /etc/ceph/ceph.conf > /etc/ceph/ceph.conf
[root@k8smaster01 ~]# kubectl -n rook-ceph exec -it $(kubectl -n rook-ceph get pod -l "app=rook-ceph-tools" -o jsonpath='{.items[0].metadata.name}') cat /etc/ceph/keyring > /etc/ceph/keyring

[root@k8smaster01 ceph]# tee /etc/yum.repos.d/ceph.repo <<-'EOF'
[Ceph]
name=Ceph packages for $basearch
baseurl=http://mirrors.aliyun.com/ceph/rpm-nautilus/el7/$basearch
enabled=1
gpgcheck=0
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc
priority=1

[Ceph-noarch]
name=Ceph noarch packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-nautilus/el7/noarch
enabled=1
gpgcheck=0
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc
priority=1

[ceph-source]
name=Ceph source packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-nautilus/el7/SRPMS
enabled=1
gpgcheck=0
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc
priority=1
EOF
[root@k8smaster01 ceph]# yum -y install ceph-common ceph-fuse #安装客户端
[root@k8smaster01 ~]# ceph status
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提示:rpm-nautilus版本建议和2.8所查看的版本一致。基于Kubernetes的rook Ceph集群,强烈不建议直接使用ceph命令进行管理,否则可能出现非一致性,对于rook集群的使用参考步骤三,ceph命令仅限于简单的集群查看。

三 Ceph 块存储

3.1 创建StorageClass

在提供(Provisioning)块存储之前,需要先创建StorageClass和存储池。K8S需要这两类资源,才能和Rook交互,进而分配持久卷(PV)。
[root@k8smaster01 ceph]# kubectl create -f csi/rbd/storageclass.yaml
解读:如下配置文件中会创建一个名为replicapool的存储池,和rook-ceph-block的storageClass。
  1 apiVersion: ceph.rook.io/v1
  2 kind: CephBlockPool
  3 metadata:
  4   name: replicapool
  5   namespace: rook-ceph
  6 spec:
  7   failureDomain: host
  8   replicated:
  9     size: 3
 10 ---
 11 apiVersion: storage.k8s.io/v1
 12 kind: StorageClass
 13 metadata:
 14    name: rook-ceph-block
 15 provisioner: rook-ceph.rbd.csi.ceph.com
 16 parameters:
 17     clusterID: rook-ceph
 18     pool: replicapool
 19     imageFormat: "2"
 20     imageFeatures: layering
 21     csi.storage.k8s.io/provisioner-secret-name: rook-csi-rbd-provisioner
 22     csi.storage.k8s.io/provisioner-secret-namespace: rook-ceph
 23     csi.storage.k8s.io/node-stage-secret-name: rook-csi-rbd-node
 24     csi.storage.k8s.io/node-stage-secret-namespace: rook-ceph
 25     csi.storage.k8s.io/fstype: ext4
 26 reclaimPolicy: Delete
[root@k8smaster01 ceph]# kubectl get storageclasses.storage.k8s.io
NAME PROVISIONER AGE
rook-ceph-block rook-ceph.rbd.csi.ceph.com 8m44s

3.2 创建PVC

[root@k8smaster01 ceph]# kubectl create -f csi/rbd/pvc.yaml
  1 apiVersion: v1
  2 kind: PersistentVolumeClaim
  3 metadata:
  4   name: block-pvc
  5 spec:
  6   storageClassName: rook-ceph-block
  7   accessModes:
  8   - ReadWriteOnce
  9   resources:
 10     requests:
 11       storage: 200Mi
[root@k8smaster01 ceph]# kubectl get pvc
[root@k8smaster01 ceph]# kubectl get pv
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解读:如上创建相应的PVC,storageClassName:为基于rook Ceph集群的rook-ceph-block。

3.3 消费块设备

[root@k8smaster01 ceph]# vi rookpod01.yaml
  1 apiVersion: v1
  2 kind: Pod
  3 metadata:
  4   name: rookpod01
  5 spec:
  6   restartPolicy: OnFailure
  7   containers:
  8   - name: test-container
  9     image: busybox
 10     volumeMounts:
 11     - name: block-pvc
 12       mountPath: /var/test
 13     command: ['sh', '-c', 'echo "Hello World" > /var/test/data; exit 0']
 14   volumes:
 15   - name: block-pvc
 16     persistentVolumeClaim:
 17       claimName: block-pvc
[root@k8smaster01 ceph]# kubectl create -f rookpod01.yaml
[root@k8smaster01 ceph]# kubectl get pod
NAME READY STATUS RESTARTS AGE
rookpod01 0/1 Completed 0 5m35s
解读:创建如上Pod,并挂载3.2所创建的PVC,等待执行完毕。

3.4 测试持久性

[root@k8smaster01 ceph]# kubectl delete pods rookpod01 #删除rookpod01
[root@k8smaster01 ceph]# vi rookpod02.yaml
  1 apiVersion: v1
  2 kind: Pod
  3 metadata:
  4   name: rookpod02
  5 spec:
  6   restartPolicy: OnFailure
  7   containers:
  8   - name: test-container
  9     image: busybox
 10     volumeMounts:
 11     - name: block-pvc
 12       mountPath: /var/test
 13     command: ['sh', '-c', 'cat /var/test/data; exit 0']
 14   volumes:
 15   - name: block-pvc
 16     persistentVolumeClaim:
 17       claimName: block-pvc
[root@k8smaster01 ceph]# kubectl create -f rookpod02.yaml
[root@k8smaster01 ceph]# kubectl logs rookpod02 test-container
Hello World
解读:创建rookpod02,并使用所创建的PVC,测试持久性。
提示:更多Ceph块设备知识参考《003.RHCS-RBD块存储使用》。

四 Ceph 对象存储

4.1 创建CephObjectStore

在提供(object)对象存储之前,需要先创建相应的支持,使用如下官方提供的默认yaml可部署对象存储的CephObjectStore。
[root@k8smaster01 ceph]# kubectl create -f object.yaml
  1 apiVersion: ceph.rook.io/v1
  2 kind: CephObjectStore
  3 metadata:
  4   name: my-store
  5   namespace: rook-ceph
  6 spec:
  7   metadataPool:
  8     failureDomain: host
  9     replicated:
 10       size: 3
 11   dataPool:
 12     failureDomain: host
 13     replicated:
 14       size: 3
 15   preservePoolsOnDelete: false
 16   gateway:
 17     type: s3
 18     sslCertificateRef:
 19     port: 80
 20     securePort:
 21     instances: 1
 22     placement:
 23     annotations:
 24     resources:
[root@k8smaster01 ceph]# kubectl -n rook-ceph get pod -l app=rook-ceph-rgw #部署完成会创建rgw的Pod
NAME READY STATUS RESTARTS AGE
rook-ceph-rgw-my-store-a-6bd6c797c4-7dzjr 1/1 Running 0 19s

4.2 创建StorageClass

使用如下官方提供的默认yaml可部署对象存储的StorageClass。
[root@k8smaster01 ceph]# kubectl create -f storageclass-bucket-delete.yaml
  1 apiVersion: storage.k8s.io/v1
  2 kind: StorageClass
  3 metadata:
  4    name: rook-ceph-delete-bucket
  5 provisioner: ceph.rook.io/bucket
  6 reclaimPolicy: Delete
  7 parameters:
  8   objectStoreName: my-store
  9   objectStoreNamespace: rook-ceph
 10   region: us-east-1
[root@k8smaster01 ceph]# kubectl get sc
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4.3 创建bucket

使用如下官方提供的默认yaml可部署对象存储的bucket。
[root@k8smaster01 ceph]# kubectl create -f object-bucket-claim-delete.yaml
  1 apiVersion: objectbucket.io/v1alpha1
  2 kind: ObjectBucketClaim
  3 metadata:
  4   name: ceph-delete-bucket
  5 spec:
  6   generateBucketName: ceph-bkt
  7   storageClassName: rook-ceph-delete-bucket

4.4 设置对象存储访问信息

[root@k8smaster01 ceph]# kubectl -n default get cm ceph-delete-bucket -o yaml | grep BUCKET_HOST | awk '{print $2}'
rook-ceph-rgw-my-store.rook-ceph
[root@k8smaster01 ceph]# kubectl -n rook-ceph get svc rook-ceph-rgw-my-store
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
rook-ceph-rgw-my-store ClusterIP 10.102.165.187 <none> 80/TCP 7m34s
[root@k8smaster01 ceph]# export AWS_HOST=$(kubectl -n default get cm ceph-delete-bucket -o yaml | grep BUCKET_HOST | awk '{print $2}')
[root@k8smaster01 ceph]# export AWS_ACCESS_KEY_ID=$(kubectl -n default get secret ceph-delete-bucket -o yaml | grep AWS_ACCESS_KEY_ID | awk '{print $2}' | base64 --decode)
[root@k8smaster01 ceph]# export AWS_SECRET_ACCESS_KEY=$(kubectl -n default get secret ceph-delete-bucket -o yaml | grep AWS_SECRET_ACCESS_KEY | awk '{print $2}' | base64 --decode)
[root@k8smaster01 ceph]# export AWS_ENDPOINT='10.102.165.187'
[root@k8smaster01 ceph]# echo '10.102.165.187 rook-ceph-rgw-my-store.rook-ceph' >> /etc/hosts

4.5 测试访问

[root@k8smaster01 ceph]# radosgw-admin bucket list #查看bucket
[root@k8smaster01 ceph]# yum --assumeyes install s3cmd #安装S3客户端
[root@k8smaster01 ceph]# echo "Hello Rook" > /tmp/rookObj #创建测试文件
[root@k8smaster01 ceph]# s3cmd put /tmp/rookObj --no-ssl --host=${AWS_HOST} --host-bucket= s3://ceph-bkt-377bf96f-aea8-4838-82bc-2cb2c16cccfb/test.txt #测试上传至bucket
提示:更多rook 对象存储使用,如创建用户等参考:https://rook.io/docs/rook/v1.1/ceph-object.html。

五 Ceph 文件存储

5.1 创建CephFilesystem

默认Ceph未部署对CephFS的支持,使用如下官方提供的默认yaml可部署文件存储的filesystem。
[root@k8smaster01 ceph]# kubectl create -f filesystem.yaml
  1 apiVersion: ceph.rook.io/v1
  2 kind: CephFilesystem
  3 metadata:
  4   name: myfs
  5   namespace: rook-ceph
  6 spec:
  7   metadataPool:
  8     replicated:
  9       size: 3
 10   dataPools:
 11     - failureDomain: host
 12       replicated:
 13         size: 3
 14   preservePoolsOnDelete: true
 15   metadataServer:
 16     activeCount: 1
 17     activeStandby: true
 18     placement:
 19        podAntiAffinity:
 20           requiredDuringSchedulingIgnoredDuringExecution:
 21           - labelSelector:
 22               matchExpressions:
 23               - key: app
 24                 operator: In
 25                 values:
 26                 - rook-ceph-mds
 27             topologyKey: kubernetes.io/hostname
 28     annotations:
 29     resources:
[root@k8smaster01 ceph]# kubectl get cephfilesystems.ceph.rook.io -n rook-ceph
NAME ACTIVEMDS AGE
myfs 1 27s

5.2 创建StorageClass

[root@k8smaster01 ceph]# kubectl create -f csi/cephfs/storageclass.yaml
使用如下官方提供的默认yaml可部署文件存储的StorageClass。
[root@k8smaster01 ceph]# vi csi/cephfs/storageclass.yaml
  1 apiVersion: storage.k8s.io/v1
  2 kind: StorageClass
  3 metadata:
  4   name: csi-cephfs
  5 provisioner: rook-ceph.cephfs.csi.ceph.com
  6 parameters:
  7   clusterID: rook-ceph
  8   fsName: myfs
  9   pool: myfs-data0
 10   csi.storage.k8s.io/provisioner-secret-name: rook-csi-cephfs-provisioner
 11   csi.storage.k8s.io/provisioner-secret-namespace: rook-ceph
 12   csi.storage.k8s.io/node-stage-secret-name: rook-csi-cephfs-node
 13   csi.storage.k8s.io/node-stage-secret-namespace: rook-ceph
 14 reclaimPolicy: Delete
 15 mountOptions:
[root@k8smaster01 ceph]# kubectl get sc
NAME PROVISIONER AGE
csi-cephfs rook-ceph.cephfs.csi.ceph.com 10m

5.3 创建PVC

[root@k8smaster01 ceph]# vi rookpvc03.yaml
  1 apiVersion: v1
  2 kind: PersistentVolumeClaim
  3 metadata:
  4   name: cephfs-pvc
  5 spec:
  6   storageClassName: csi-cephfs
  7   accessModes:
  8   - ReadWriteOnce
  9   resources:
 10     requests:
 11       storage: 200Mi
[root@k8smaster01 ceph]# kubectl create -f rookpvc03.yaml
[root@k8smaster01 ceph]# kubectl get pv
[root@k8smaster01 ceph]# kubectl get pvc
clipboard

5.4 消费PVC

[root@k8smaster01 ceph]# vi rookpod03.yaml
  1 ---
  2 apiVersion: v1
  3 kind: Pod
  4 metadata:
  5   name: csicephfs-demo-pod
  6 spec:
  7   containers:
  8    - name: web-server
  9      image: nginx
 10      volumeMounts:
 11        - name: mypvc
 12          mountPath: /var/lib/www/html
 13   volumes:
 14    - name: mypvc
 15      persistentVolumeClaim:
 16        claimName: cephfs-pvc
 17        readOnly: false
[root@k8smaster01 ceph]# kubectl create -f rookpod03.yaml
[root@k8smaster01 ceph]# kubectl get pods
NAME READY STATUS RESTARTS AGE
csicephfs-demo-pod 1/1 Running 0 24s

六 设置dashboard

6.1 部署Node SVC

步骤2.4已创建dashboard,但仅使用clusterIP暴露服务,使用如下官方提供的默认yaml可部署外部nodePort方式暴露服务的dashboard。
[root@k8smaster01 ceph]# kubectl create -f dashboard-external-https.yaml
[root@k8smaster01 ceph]# vi dashboard-external-https.yaml
  1 apiVersion: v1
  2 kind: Service
  3 metadata:
  4   name: rook-ceph-mgr-dashboard-external-https
  5   namespace: rook-ceph
  6   labels:
  7     app: rook-ceph-mgr
  8     rook_cluster: rook-ceph
  9 spec:
 10   ports:
 11   - name: dashboard
 12     port: 8443
 13     protocol: TCP
 14     targetPort: 8443
 15   selector:
 16     app: rook-ceph-mgr
 17     rook_cluster: rook-ceph
 18   sessionAffinity: None
 19   type: NodePort
[root@k8smaster01 ceph]# kubectl get svc -n rook-ceph
clipboard

6.2 确认验证

kubectl -n rook-ceph get secret rook-ceph-dashboard-password -o jsonpath='{.data.password}' | base64 --decode #获取初始密码
浏览器访问:https://172.24.8.71:31097
clipboard
账号:admin,密码:如上查找即可。
clipboard

七 集群管理

7.1 修改配置

默认创建Ceph集群的配置参数在创建Cluster的时候生成Ceph集群的配置参数,若需要在部署完成后修改相应参数,可通过如下操作试下:
[root@k8smaster01 ceph]# kubectl -n rook-ceph get configmap rook-config-override -o yaml #获取参数
[root@k8snode02 ~]# cat /var/lib/rook/rook-ceph/rook-ceph.config #也可在任何node上查看
[root@k8smaster01 ceph]# kubectl -n rook-ceph edit configmap rook-config-override -o yaml #修改参数
  1 ……
  2 apiVersion: v1
  3 data:
  4   config: |
  5     [global]
  6     osd pool default size = 2
  7 ……
依次重启ceph组件
[root@k8smaster01 ceph]# kubectl -n rook-ceph delete pod rook-ceph-mgr-a-5699bb7984-kpxgp
[root@k8smaster01 ceph]# kubectl -n rook-ceph delete pod rook-ceph-mon-a-85698dfff9-w5l8c
[root@k8smaster01 ceph]# kubectl -n rook-ceph delete pod rook-ceph-mgr-a-d58847d5-dj62p
[root@k8smaster01 ceph]# kubectl -n rook-ceph delete pod rook-ceph-mon-b-76559bf966-652nl
[root@k8smaster01 ceph]# kubectl -n rook-ceph delete pod rook-ceph-mon-c-74dd86589d-s84cz
注意:ceph-mon, ceph-osd的delete最后是one-by-one的,等待ceph集群状态为HEALTH_OK后再delete另一个。
提示:其他更多rook配置参数参考:https://rook.io/docs/rook/v1.1/。

7.2 创建Pool

对rook Ceph集群的pool创建,建议采用Kubernetes的方式,而不建议使用toolbox中的ceph命令。
使用如下官方提供的默认yaml可部署Pool。
[root@k8smaster01 ceph]# kubectl create -f pool.yaml
  1 apiVersion: ceph.rook.io/v1
  2 kind: CephBlockPool
  3 metadata:
  4   name: replicapool2
  5   namespace: rook-ceph
  6 spec:
  7   failureDomain: host
  8   replicated:
  9     size: 3
 10   annotations:

7.3 删除Pool

[root@k8smaster01 ceph]# kubectl delete -f pool.yaml
提示:更多Pool管理,如纠删码池参考:https://rook.io/docs/rook/v1.1/ceph-pool-crd.html。

7.4 添加OSD节点

本步骤模拟将k8smaster的sdb添加为OSD。
[root@k8smaster01 ceph]# kubectl taint node k8smaster01 node-role.kubernetes.io/master- #允许调度Pod
[root@k8smaster01 ceph]# kubectl label nodes k8smaster01 ceph-osd=enabled #设置标签
[root@k8smaster01 ceph]# vi cluster.yaml #追加master01的配置
……
- name: "k8smaster01"
config:
storeType: bluestore
devices:
- name: "sdb"
……
clipboard
[root@k8smaster01 ceph]# kubectl apply -f cluster.yaml
[root@k8smaster01 ceph]# kubectl -n rook-ceph get pod -o wide -w
clipboard
ceph osd tree

7.5 删除OSD节点

[root@k8smaster01 ceph]# kubectl label nodes k8smaster01 ceph-osd- #删除标签

[root@k8smaster01 ceph]# vi cluster.yaml #删除如下master01的配置
  1 ……
  2     - name: "k8smaster01"
  3       config:
  4         storeType: bluestore
  5       devices:
  6       - name: "sdb"
  7 ……
clipboard
[root@k8smaster01 ceph]# kubectl apply -f cluster.yaml
[root@k8smaster01 ceph]# kubectl -n rook-ceph get pod -o wide -w
[root@k8smaster01 ceph]# rm -rf /var/lib/rook

7.6 删除Cluster

完整优雅删除rook集群的方式参考:https://github.com/rook/rook/blob/master/Documentation/ceph-teardown.md

7.7 升级rook

参考:http://www.yangguanjun.com/2018/12/28/rook-ceph-practice-part2/。
更多官网文档参考:https://rook.github.io/docs/rook/v1.1/
推荐博文:http://www.yangguanjun.com/archives/
https://sealyun.com/post/rook/

原文出处:https://www.cnblogs.com/itzgr/p/12516141.html

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