环境准备

modprobe dm_thin_pool
modprobe dm-snapshot

cat >/etc/modules-load.d/glusterfs.conf<<EOF
dm-snapshot
dm_thin_pool
EOF

#yum install -y glusterfs-fuse lvm2
yum -y localinstall --disablerepo=* env_package/*.rpm

#如需开启防火墙。需开放端口
iptables -N heketi
iptables -A heketi -p tcp -m state --state NEW -m tcp --dport 24007 -j ACCEPT
iptables -A heketi -p tcp -m state --state NEW -m tcp --dport 24008 -j ACCEPT
iptables -A heketi -p tcp -m state --state NEW -m tcp --dport 2222 -j ACCEPT
iptables -A heketi -p tcp -m state --state NEW -m multiport --dports 49152:49251 -j ACCEPT
service iptables save

安装

• 下载heketi

wget https://github.com/heketi/heketi/releases/download/v8.0.0/heketi-client-v8.0.0.linux.amd64.tar.gz
tar xf heketi-client-v8.0.0.linux.amd64.tar.gz
cp heketi-client/bin/heketi-cli /usr/local/bin
heketi-cli -v

• 在k8s中部署glusterfs

cd heketi-client/share/heketi/kubernetes
#如果本地下载了镜像，修改镜像拉取策略Always
kubectl create -f glusterfs-daemonset.json

部署

• 给node节点打label部署daemonset

kubectl get nodes
kubectl label node master node-1 node-2 storagenode=glusterfs
kubectl get pods -o wide

• 部署heketi server并配置权限

kubectl create -f heketi-service-account.json
kubectl create clusterrolebinding heketi-gluster-admin --clusterrole=edit --serviceaccount=default:heketi-service-account

• 创建 cofig secret

kubectl create secret generic heketi-config-secret --from-file=./heketi.json

• 初始化部署

kubectl create -f heketi-bootstrap.json
kubectl get pods -o wide
kubectl get svc

• 测试访问

HEKETI_BOOTSTRAP_POD=$(kubectl get pods | grep deploy-heketi | awk '{print $1}')
kubectl port-forward $HEKETI_BOOTSTRAP_POD 30080:8080
#另起终端访问
curl http://localhost:30080/hello

• 配置glusterfs

cat >topology.json<<EOF
{
  "clusters": [
    {
      "nodes": [
        {
          "node": {
            "hostnames": {
              "manage": [
                "master"
              ],
              "storage": [
                "192.168.214.101"
              ]
            },
            "zone": 1
          },
          "devices": [
            {
              "name": "/dev/sdb",
              "destroydata": false
            }
          ]
        },
        {
          "node": {
            "hostnames": {
              "manage": [
                "node-1"
              ],
              "storage": [
                "192.168.214.102"
              ]
            },
            "zone": 1
          },
          "devices": [
            {
              "name": "/dev/sdb",
              "destroydata": false
            }
          ]
        },
        {
          "node": {
            "hostnames": {
              "manage": [
                "node-2"
              ],
              "storage": [
                "192.168.214.103"
              ]
            },
            "zone": 1
          },
          "devices": [
            {
              "name": "/dev/sdb",
              "destroydata": false
            }
          ]
        }
      ]
    }
  ]
}
EOF

#设置heketi访问地址
export HEKETI_CLI_SERVER=http://localhost:30080
#或者设置svc nodePort方式，-s指定服务端地址
#heketi-cli -s http://10.16.2.95:30080 topology load --json=topology.json
heketi-cli topology load --json=topology.json

如果出现错误，需初始化磁盘

dd if=/dev/zero of=/dev/sdb bs=1k count=1
blockdev --rereadpt /dev/sdb

Can’t open /dev/sdb exclusively. Mounted filesystem?

dmsetup ls
ll /dev/mapper/
dmsetup remove xxx

• 使用 Heketi 创建一个用于存储 Heketi 数据库的 volume

heketi-cli setup-openshift-heketi-storage
kubectl create -f heketi-storage.json
kubectl get pods
kubectl get job

• 删除部署时产生的相关资源

kubectl delete all,service,jobs,deployment,secret --selector="deploy-heketi"

• 部署 heketi server

kubectl create -f heketi-deployment.json
kubectl get pods -o wide
kubectl get svc

• 查看 heketi 状态信息, 配置端口转发 heketi server

HEKETI_BOOTSTRAP_POD=$(kubectl get pods | grep heketi | awk '{print $1}')
kubectl port-forward $HEKETI_BOOTSTRAP_POD 30080:8080
export HEKETI_CLI_SERVER=http://localhost:30080

#export HEKETI_CLI_SERVER=http://localhost:30080
heketi-cli cluster list
heketi-cli volume list

测试

• 创建 StorageClass ，由于没有开启认证，restuser restuserkey 可以随意写

HEKETI_SERVER=$(kubectl get svc | grep heketi | head -1 | awk '{print $3}')
echo $HEKETI_SERVER

cat >storageclass-glusterfs.yaml<<EOF
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: gluster-heketi
provisioner: kubernetes.io/glusterfs
#reclaimPolicy: Retain
parameters:
  resturl: "http://$HEKETI_SERVER:8080"
  restauthenabled: "false"
  gidMin: "40000"
  gidMax: "50000"
  volumetype: "replicate:3"
#允许对pvc扩容
allowVolumeExpansion: true
EOF

kubectl create -f storageclass-glusterfs.yaml
kubectl get sc

以上创建了一个含有三个副本的gluster的存储类型（storage-class）

volumetype中的relicate必须大于1，否则创建pvc的时候会报错：[heketi] ERROR 2017/11/14 21:35:20/src/github.com/heketi/heketi/apps/glusterfs/app_volume.go:154: Failed to create volume: replica count should be greater than 1

在这里创建的storageclass显示指定reclaimPolicy为Retain(默认情况下是Delete)，删除pvc后pv以及后端的volume、brick(lvm)不会被删除。

• 创建pvc

cat >gluster-pvc-test.yaml<<EOF
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
 name: gluster1
 annotations:
   volume.beta.kubernetes.io/storage-class: gluster-heketi
spec:
 accessModes:
  - ReadWriteMany
 resources:
   requests:
     storage: 1Gi
EOF

kubectl apply -f gluster-pvc-test.yaml
kubectl get pvc
kubectl get pv

• 创建pod挂载测试

cat >nginx-pod.yaml<<EOF
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-gfs
  labels:
    name: nginx-gfs
spec:
  replicas: 2
  selector:
    matchLabels:
      name: nginx-gfs
  template:
    metadata:
      labels:
        name: nginx-gfs
    spec:
      containers:
      - name: nginx-gfs
        image: nginx:1.14
        imagePullPolicy: IfNotPresent
        ports:
        - name: web
          containerPort: 80
        volumeMounts:
        - name: gfs
          mountPath: /usr/share/nginx/html
      volumes:
      - name: gfs
        persistentVolumeClaim:
          claimName: gluster1
EOF
#多pod共用pv
kubectl apply -f nginx-pod.yaml
kubectl get pods -o wide

• 修改文件内容

kubectl exec -ti nginx-pod1 -- /bin/sh -c 'echo Hello World from GlusterFS!!! > /usr/share/nginx/html/index.html'
#访问测试
POD_ID=$(kubectl get pods -o wide | grep nginx-pod1 | awk '{print $(NF-1)}')
curl http://$POD_ID

• node 节点查看文件内容

GLUSTERFS_POD=$(kubectl get pod | grep glusterfs | head -1 | awk '{print $1}')
kubectl exec -ti $GLUSTERFS_POD /bin/sh
mount | grep heketi
cat /var/lib/heketi/mounts/vg_56033aa8a9131e84faa61a6f4774d8c3/brick_1ac5f3a0730457cf3fcec6d881e132a2/brick/index.html

• pvc扩容

edit更新pvc内存

扩容glusterfs

• 使用heketi-cli查看cluster ID和所有node ID

[root@k8s-1 ~]# heketi-cli cluster info
Error: Cluster id missing
[root@k8s-1 ~]# heketi-cli cluster list
Clusters:
Id:5dec5676c731498c2bdf996e110a3e5e [file][block]
[root@k8s-1 ~]# heketi-cli cluster info 5dec5676c731498c2bdf996e110a3e5e
Cluster id: 5dec5676c731498c2bdf996e110a3e5e
Nodes:
0f00835397868d3591f45432e432ba38
d38819746cab7d567ba5f5f4fea45d91
fb181b0cef571e9af7d84d2ecf534585
Volumes:
32146a51be9f980c14bc86c34f67ebd5
56d636b452d31a9d4cb523d752ad0891
828dc2dfaa00b7213e831b91c6213ae4
b9c68075c6f20438b46db892d15ed45a
Block: true

File: true

• 找到对应node ID

[root@k8s-1 ~]# heketi-cli node info 0f00835397868d3591f45432e432ba38
Node Id: 0f00835397868d3591f45432e432ba38
State: online
Cluster Id: 5dec5676c731498c2bdf996e110a3e5e
Zone: 1
Management Hostname: k8s-node02
Storage Hostname: 192.168.186.12
Devices:
Id:82af8e5f2fb2e1396f7c9e9f7698a178   Name:/dev/sdb            State:online    Size (GiB):39      Used (GiB):25      Free (GiB):14      Bricks:4

• 添加磁盘

[root@k8s-1 ~]# heketi-cli device add --name=/dev/sdc --node=0f00835397868d3591f45432e432ba38
Device added successfully

• 查看增加结果

heketi-cli node info 0f00835397868d3591f45432e432ba38