28.5.4. 使用存储

此时，您创建了一个动态创建的 GlusterFS 卷，它绑定到 PVC。现在，您可以在 pod 中使用这个 PVC。

创建 pod 对象定义：

apiVersion: v1
kind: Pod
metadata:
  name: hello-openshift-pod
  labels:
    name: hello-openshift-pod
spec:
  containers:
  - name: hello-openshift-pod
    image: openshift/hello-openshift
    ports:
    - name: web
      containerPort: 80
    volumeMounts:
    - name: gluster-vol1
      mountPath: /usr/share/nginx/html
      readOnly: false
  volumes:
  - name: gluster-vol1
    persistentVolumeClaim:
      claimName: gluster1

apiVersion: v1
kind: Pod
metadata:
  name: hello-openshift-pod
  labels:
    name: hello-openshift-pod
spec:
  containers:
  - name: hello-openshift-pod
    image: openshift/hello-openshift
    ports:
    - name: web
      containerPort: 80
    volumeMounts:
    - name: gluster-vol1
      mountPath: /usr/share/nginx/html
      readOnly: false
  volumes:
  - name: gluster-vol1
    persistentVolumeClaim:
      claimName: gluster1

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1: 上一步中创建的 PVC 名称。

在 OpenShift Container Platform master 主机上创建 pod：
```
oc create -f hello-openshift-pod.yaml
```
```
# oc create -f hello-openshift-pod.yaml
pod "hello-openshift-pod" created
```
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查看 pod。花几分钟时间，因为镜像（如果尚不存在）可能需要下载它：

oc get pods -o wide

# oc get pods -o wide
NAME                               READY     STATUS    RESTARTS   AGE       IP               NODE
hello-openshift-pod                          1/1       Running   0          9m        10.38.0.0        node1

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oc exec 进入容器并在 pod 的 mountPath 定义中创建 index.html 文件：

oc exec -ti hello-openshift-pod /bin/sh
cd /usr/share/nginx/html
echo 'Hello OpenShift!!!' > index.html
ls
exit

$ oc exec -ti hello-openshift-pod /bin/sh
$ cd /usr/share/nginx/html
$ echo 'Hello OpenShift!!!' > index.html
$ ls
index.html
$ exit

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现在，curl pod 的 URL:
```
curl http://10.38.0.0
```
```
# curl http://10.38.0.0
Hello OpenShift!!!
```
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删除 pod，重新创建它并等待它出现：

oc delete pod hello-openshift-pod
oc create -f hello-openshift-pod.yaml
oc get pods -o wide

# oc delete pod hello-openshift-pod
pod "hello-openshift-pod" deleted
# oc create -f hello-openshift-pod.yaml
pod "hello-openshift-pod" created
# oc get pods -o wide
NAME                               READY     STATUS    RESTARTS   AGE       IP               NODE
hello-openshift-pod                          1/1       Running   0          9m        10.37.0.0        node1

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现在再次 curl pod，它应该仍然具有与以前相同的数据。请注意，其 IP 地址可能已更改：
```
curl http://10.37.0.0
```
```
# curl http://10.37.0.0
Hello OpenShift!!!
```
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通过在任何节点上执行以下操作，检查 index.html 文件是否已写入 GlusterFS 存储：

mount | grep heketi
cd /var/lib/heketi/mounts/vg_f92e09091f6b20ab12b02a2513e4ed90/brick_d8c06e606ff4cc29ccb9d018c73ee292/brick
ls
cat index.html

$ mount | grep heketi
/dev/mapper/VolGroup00-LogVol00 on /var/lib/heketi type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
/dev/mapper/vg_f92e09091f6b20ab12b02a2513e4ed90-brick_1e730a5462c352835055018e1874e578 on /var/lib/heketi/mounts/vg_f92e09091f6b20ab12b02a2513e4ed90/brick_1e730a5462c352835055018e1874e578 type xfs (rw,noatime,seclabel,nouuid,attr2,inode64,logbsize=256k,sunit=512,swidth=512,noquota)
/dev/mapper/vg_f92e09091f6b20ab12b02a2513e4ed90-brick_d8c06e606ff4cc29ccb9d018c73ee292 on /var/lib/heketi/mounts/vg_f92e09091f6b20ab12b02a2513e4ed90/brick_d8c06e606ff4cc29ccb9d018c73ee292 type xfs (rw,noatime,seclabel,nouuid,attr2,inode64,logbsize=256k,sunit=512,swidth=512,noquota)

$ cd /var/lib/heketi/mounts/vg_f92e09091f6b20ab12b02a2513e4ed90/brick_d8c06e606ff4cc29ccb9d018c73ee292/brick
$ ls
index.html
$ cat index.html
Hello OpenShift!!!

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28.5.4. 使用存储

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