1. 准备存储(NFS)
$ sudo yum install nfs-utils
设置 NFS 服务开机启动
$ sudo systemctl enable rpcbind
$ sudo systemctl enable nfs
启动 NFS 服务
$ sudo systemctl start rpcbind
$ sudo systemctl start nfs
服务启动之后，我们在服务端配置一个共享目录
mkdir –p /data/volumes/linuxea-{1,2,3,4,5}
[root@kube-node1 volumes]# cat /etc/exports
/data/volumes/linuxea-1 10.0.0.0/8(rw,no_root_squash)
/data/volumes/linuxea-2 10.0.0.0/8(rw,no_root_squash)
/data/volumes/linuxea-3 10.0.0.0/8(rw,no_root_squash)
/data/volumes/linuxea-4 10.0.0.0/8(rw,no_root_squash)
/data/volumes/linuxea-5 10.0.0.0/8(rw,no_root_squash)
[root@kube-node1 volumes]# exportfs -arv
exporting 10.0.0.0/8:/data/volumes/linuxea-5
exporting 10.0.0.0/8:/data/volumes/linuxea-4
exporting 10.0.0.0/8:/data/volumes/linuxea-3
exporting 10.0.0.0/8:/data/volumes/linuxea-2
exporting 10.0.0.0/8:/data/volumes/linuxea-1
[root@kube-node1 volumes]# showmount -e
Export list for kube-node1:
/data/volumes/linuxea-5 10.0.0.0/8
/data/volumes/linuxea-4 10.0.0.0/8
/data/volumes/linuxea-3 10.0.0.0/8
/data/volumes/linuxea-2 10.0.0.0/8
/data/volumes/linuxea-1 10.0.0.0/8
2. 创建pv
[k8s@kube-node1 ~]$ cat pv-demo.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: linuxea-1
labels:
name: v1
spec:
nfs:
path: /data/volumes/linuxea-1
server: 10.0.19.152
accessModes: ["ReadWriteMany","ReadWriteOnce"]
capacity:
storage: 1Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: linuxea-2
labels:
name: v2
spec:
nfs:
path: /data/volumes/linuxea-2
server: 10.0.19.152
accessModes: ["ReadWriteMany","ReadWriteOnce"]
capacity:
storage: 2Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: linuxea-3
labels:
name: v3
spec:
nfs:
path: /data/volumes/linuxea-3
server: 10.0.19.152
accessModes: ["ReadWriteMany","ReadWriteOnce"]
capacity:
storage: 3Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: linuxea-4
labels:
name: v4
spec:
nfs:
path: /data/volumes/linuxea-4
server: 10.0.19.152
accessModes: ["ReadWriteMany","ReadWriteOnce"]
capacity:
storage: 4Gi
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: linuxea-5
labels:
name: v5
spec:
nfs:
path: /data/volumes/linuxea-5
server: 10.0.19.152
accessModes: ["ReadWriteMany","ReadWriteOnce"]
capacity:
storage: 5Gi
定义完成后apply启动
kubectl apply -f pv-demo.yaml
persistentvolume/linuxea-1 created
persistentvolume/linuxea-2 created
persistentvolume/linuxea-3 created
persistentvolume/linuxea-4 created
persistentvolume/linuxea-5 created
3. 创建pvc
[k8s@kube-node1 ~]$ cat pvc-demo.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: linuxea-pvc
namespace: default
spec:
accessModes: ["ReadWriteMany"]
resources:
requests:
storage: 5Gi
---
apiVersion: v1
kind: Pod
metadata:
name: linuxea-pvc-pod
namespace: default
spec:
containers:
- name: linuxea-pod1-pvc
image: "marksugar/nginx:1.14.a"
ports:
- containerPort: 88
volumeMounts:
- name: linuxea-image
mountPath: /data/wwwroot/
volumes:
- name: linuxea-image
persistentVolumeClaim:
claimName: linuxea-pvc
apply创建
[root@kube-node1]# kubectl apply -f pvc-demo.yaml
persistentvolumeclaim/linuxea-pvc created
pod/linuxea-pvc-pod created
可使用kubectl get pvc查看已经创建好的pvc已经被Bound
[root@kube-node1]# kubectl get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
linuxea-pvc Bound linuxea-5 5Gi RWO,RWX 6s
以及pod
[root@kube-node1]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
linuxea-pvc-pod 1/1 Running 0 3h 172.30.1.19 kube-node2
而后创建pvc之后，可查看pv已经被绑定到linuxea-5上的pv上（大于等于5G）
[root@kube-node1]# kubectl get pv
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
linuxea-1 1Gi RWO,RWX Retain Available 2m
linuxea-2 2Gi RWO,RWX Retain Available 2m
linuxea-3 3Gi RWO,RWX Retain Available 2m
linuxea-4 4Gi RWO,RWX Retain Available 2m
linuxea-5 5Gi RWO,RWX Retain Bound default/linuxea-pvc 2m
也可以使用kubectl describe pods linuxea-pvc-pod|grep root查看信息
[root@kube-node1]# kubectl describe pods linuxea-pvc-pod|grep root
/data/wwwroot/ from linuxea-image (rw)
pv写入测试
在集群内访问
[k8s@kube-node1 ~]$ curl 172.30.1.19
linuxea-linuxea-pvc-pod.com-127.0.0.1/8 172.30.1.19/24
而后回到nfs修改
[root@kube-node1 volumes]# echo `date` >> /data/volumes/linuxea-5/index.html
在集群内第二次访问查看
[k8s@kube-node1 ~]$ curl 172.30.1.19
linuxea-linuxea-pvc-pod.com-127.0.0.1/8 172.30.1.19/24
Wed Apr 3 10:45:11 CST 2019
创建多大的pv，可能需要事先设定好，pvc才能适配
