GlusterFS is an open-source distributed file with strong horizontal expansion ability. It can support several petabytes of storage capacity and thousands of clients. It is interconnected into a parallel network file system through the network. It has the characteristics of expansibility, high performance and high availability.

1. Create endpoint with the file name of glusterfs_ep.yaml

$ vi glusterfs_ep.yaml
apiVersion: v1
kind: Endpoints
metadata:
  name: glusterfs
  namespace: default
subsets:
# Add the IP address of each cluster of GlusterFS
- addresses:
  - ip: 10.0.0.41
  - ip: 10.0.0.42
  ports:
  # Add GlusterFS port number
  - port: 49152
    protocol: TCP

Implementation of yaml

$ kubectl create -f  glusterfs_ep.yaml
endpoints/glusterfs created

// View the created endpoints
[root@k8s-master01 ~]# kubectl get ep
NAME                 ENDPOINTS                                    AGE
glusterfs            10.0.0.41:49152,10.0.0.42:49152       15s

2. Create svc for the endpoint
Endpoint is the cluster node of clusterfs. If you need to access these nodes, you need to create svc

$ vi glusterfs_svc.yaml
apiVersion: v1
kind: Service
metadata:
  # The name must be the same as the name in endpoint
  name: glusterfs
spec:
  ports:
  - port: 49152
    protocol: TCP
    targetPort: 49152
  sessionAffinity: None
  type: ClusterIP

Implementation of yaml

$ kubectl create -f  glusterfs_svc.yaml
service/glusterfs created

$ kubectl get svc
NAME                 TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)     AGE
glusterfs            ClusterIP   10.1.104.145   <none>        49152/TCP   20s

3. Create pv for Glusterfs

$ vi glusterfs_pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
  name: gluster
  labels:
    type: glusterfs
spec:
  capacity:
      # Specify the capacity of the pv
    storage: 50Gi
  accessModes:
    - ReadWriteMany
  glusterfs:
    # Specify the endpoint name of glusterfs
    endpoints: "glusterfs"
    # The path name is the volume created in glusterfs
    # You can log in to the glusterfs cluster and execute the "gluster volume list" command to view the created volumes
    path: "gv0"
    readOnly: false

Implementation of yaml

$ kubectl create -f  glusterfs_pv.yaml
persistentvolume/gluster created

$ kubectl get pv
NAME      CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM   STORAGECLASS   REASON   AGE
gluster   50Gi       RWX            Retain           Available                                   10s

4. Create pvc for Glusterfs

$ vi glusterfs_pvc.yaml
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  # The name must be the same as the specified pv
  name: gluster
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
          # Specify the capacity space of pvc
      storage: 20Gi

Implementation of yaml

$ kubectl  create -f glusterfs_pvc.yaml
persistentvolumeclaim/gluster created

$ kubectl get pvc
NAME      STATUS   VOLUME    CAPACITY   ACCESS MODES   STORAGECLASS   AGE
gluster   Bound    gluster   50Gi       RWX                           83s

5. Create nginx pod and mount it to the PVC nginx peng.yaml of the cluster

$ vim nginx-demo.yaml
---
# Pod
apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    app: web
    env: test
spec:
  containers:
    - name: nginx
      image: nginx:1.13
      ports:
        - containerPort: 80
      volumeMounts:
        - name: data-gv0
          mountPath: /usr/share/nginx/html
  volumes:
  - name: data-gv0
    persistentVolumeClaim:
          # Bind the specified pv
      claimName: gluster

Implementation of yaml

$ kubectl  create -f nginx-demo.yaml
pod/nginx created

[root@k8s-master01 ~]# kubectl get pods  | grep "nginx"
nginx  1/1     Running     0          2m     10.244.1.222   k8s-node01   <none>           <none>

Mount / mnt to the glusterfs directory on any client and create an index.html file

$ mount -t glusterfs k8s-store01:/gv0 /mnt/
$ cd /mnt && echo "this nginx store used gluterfs cluster" >index.html

Accessing pod through curl on the master node

$ curl  10.244.1.220/index.html
this nginx store used gluterfs cluster