微软OneNote客户预览版学习工具下载(暂未上线):教学好帮手
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2022-05-28
学习k8s存储架构原理后,对持久化存储和PV/PVC的工作原理有了更深入的了解。部署cephfs条件需要3个以上的node节点和每个节点都必须有3个以上的硬盘才可以。如果部署要另外添加云硬盘,增加学习成本,不划算。之前有部署过glusterfs,但是怕部署glusterfs会跟华为的MRS大数据集群在同时使用时有冲突和抢占资源(特别是存储资源),所以我部署了NFS作为共享存储,避免资源的抢占。
1.1 在mas2安装NFS软件和启动NFS:
yum -y install nfs-utils rpcbind
systemctl start nfs-server rpcbind
systemctl enable nfs-server rpcbind
查看硬盘容量:
df -h
1.2 建立NFS目录
mkdir -p /srv/BigData/k8snfs
cd /srv/BigData/k8snfs
echo wuyicom > index.html
1.3 修改配置
vi /etc/exports
/srv/BigData/k8snfs *(rw,async,no_root_squash)
1.4 重启NFS
systemctl restart nfs-server
exportfs -arv
1.5 客户端测试,所有node节点上要安装nfs客户端
yum -y install nfs-utils rpcbind
systemctl start nfs rpcbind
showmount -e 192.168.0.146
2.手动管理pv和pvc太麻烦了,建议使用StorageClass管理pv和pvc
动态生成pv需要StorageClass和nfs-client-provisioner的共同作用
2.1 创建nfs-client-provisioner
provisione直接使用nfs服务器
查看是否有nfs-client-provisioner镜像
docker search nfs-client-provisioner
docker pull jmgao1983/nfs-client-provisioner
2.2 创建deployment.yaml文件
****
vi deployment.yaml
kind: Deployment
apiVersion: apps/v1
metadata:
name: nfs-client-provisioner
spec:
replicas: 1
selector:
matchLabels:
app: nfs-client-provisioner
strategy:
type: Recreate
template:
metadata:
labels:
app: nfs-client-provisioner
spec:
serviceAccountName: nfs-client-provisioner
containers:
- name: nfs-client-provisioner
image: jmgao1983/nfs-client-provisioner:latest
volumeMounts:
- name: nfs-client-root
mountPath: /persistentvolumes
env:
- name: PROVISIONER_NAME
value: fuseim.pri/ifs
- name: NFS_SERVER
value: 192.168.0.146
- name: NFS_PATH
value: /srv/BigData/k8snfs
volumes:
- name: nfs-client-root
nfs:
server: 192.168.0.146
path: /srv/BigData/k8snfs
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: nfs-client-provisioner
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: nfs-client-provisioner-runner
rules:
- apiGroups: [""]
resources: ["persistentvolumes"]
verbs: ["get", "list", "watch", "create", "delete"]
- apiGroups: [""]
resources: ["persistentvolumeclaims"]
verbs: ["get", "list", "watch", "update"]
- apiGroups: ["storage.k8s.io"]
resources: ["storageclasses"]
verbs: ["get", "list", "watch"]
- apiGroups: [""]
resources: ["events"]
verbs: ["list", "watch", "create", "update", "patch"]
- apiGroups: [""]
resources: ["endpoints"]
verbs: ["create", "delete", "get", "list", "watch", "patch", "update"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: run-nfs-client-provisioner
subjects:
- kind: ServiceAccount
name: nfs-client-provisioner
namespace: default
roleRef:
kind: ClusterRole
name: nfs-client-provisioner-runner
apiGroup: rbac.authorization.k8s.io
*************
kubectl create -f deployment.yaml
查看POD:
kubectl get pod
2.3 创建StorageClass
vi nfsclass.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: course-nfs-storage
provisioner: fuseim.pri/ifs
**************
kubectl create -f nfsclass.yaml
查看storageclass:
kubectl get sc
2.4 在做测试:
vi test2.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: nfs-web
spec:
serviceName: "nginx"
replicas: 2
selector:
matchLabels:
app: nfs-web
template:
metadata:
labels:
app: nfs-web
spec:
terminationGracePeriodSeconds: 10
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
name: web
volumeMounts:
- name: www
mountPath: /usr/share/nginx/html
volumeClaimTemplates:
- metadata:
name: www
annotations:
volume.beta.kubernetes.io/storage-class: course-nfs-storage
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi
*********************
kubectl create -f test-pod.yaml
出现下面的问题如图所示:
出现这个问题后后续再解决吧。
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