k8s整合glusterfs做后端存储

1. 安装glusterfs和heketi

```code

#所有存储服务器下载安装glusterfs

yum install centos-release-gluster -y

yum install glusterfs-server -y

#启动

systemctl start glusterd

#安装heketi

yum install -y heketi heketi-client

```

2. 部署gluster集群

```code

gluster peer probe node0

gluster peer probe node1

gluster peer probe node2

gluster peer status

mkdir /data/gluster/data -p

gluster volume create glusterfs_volume replica 3 node0:/data/gluster/data node1:/data/gluster/data node2:/data/gluster/data force

gluster volume info

gluster volume start glusterfs_volume

yum install -y glusterfs glusterfs-fuse

```

3. 配置heketi

```code

[root@node0 ~]# cat /etc/heketi/heketi.json

{

“_port_comment”: “Heketi Server Port Number”,

“port”: “8080”,

“_use_auth”: “Enable JWT authorization. Please enable for deployment”,

“use_auth”: false,

“_jwt”: “Private keys for access”,

“jwt”: {

_admin”: “Admin has access to all APIs”,

“admin”: {

“key”: “My Secret”

},

“_user”: “User only has access to /volumes endpoint”,

“user”: {

“key”: “My Secret”

}

},

“_glusterfs_comment”: “GlusterFS Configuration”,

“glusterfs”: {

“_executor_comment”: [

“Execute plugin. Possible choices: mock, ssh”,

“mock: This setting is used for testing and development.”,

“ It will not send commands to any node.”,

“ssh: This setting will notify Heketi to ssh to the nodes.”,

“ It will need the values in sshexec to be configured.”,

“kubernetes: Communicate with GlusterFS containers over”,

“ Kubernetes exec api.”

],

“executor”: “mock”,

“_sshexec_comment”: “SSH username and private key file information”,

“sshexec”: {

“keyfile”: “/etc/heketi/heketi_key”,

“user”: “root”,

“port”: “22”,

“fstab”: “/etc/fstab”

},

“_kubeexec_comment”: “Kubernetes configuration”,

“kubeexec”: {

“host” :”https://127.0.0.1:8443",

“cert” : “/path/to/crt.file”,

“insecure”: false,

“user”: “kubernetes username”,

“password”: “password for kubernetes user”,

“namespace”: “OpenShift project or Kubernetes namespace”,

“fstab”: “Optional: Specify fstab file on node. Default is /etc/fstab”

},

“_db_comment”: “Database file name”,

“db”: “/var/lib/heketi/heketi.db”,

“_loglevel_comment”: [

“Set log level. Choices are:”,

“ none, critical, error, warning, info, debug”,

“Default is warning”

],

“loglevel” : “debug”

}

}

```

3. 配置免密登陆

```code

#设置heketi免密访问GlusterFS

[root@master heketi]# ssh-keygen -t rsa -q -f /etc/heketi/heketi_key -N “”

[root@master heketi]# chown heketi:heketi /etc/heketi/heketi_key

#分发公钥

[root@master heketi]# ssh-copy-id -i /etc/heketi/heketi_key.pub root@master

[root@master heketi]# ssh-copy-id -i /etc/heketi/heketi_key.pub root@node1

#将秘钥充master服务器复制到node1服务器上

[root@master heketi]# rsync -avz /etc/heketi/heketi_key root@node1:/etc/heketi/

```

4. 启动heketi

```code

systemctl enable heketi

systemctl restart heketi

systemctl status heketi

[root@master ~]# curl http://localhost:8080/hello

Hello from Heketi

```

5. 设置集群

```code

[root@node0 ~]# cat /etc/heketi/topology.json

{

“clusters”: [

{

“nodes”: [

{

“node”: {

“hostnames”: {

“manage”: [

“192.168.90.219”

],

“storage”: [

“192.168.90.219”

]

},

“zone”: 1

},

“devices”: [

“/dev/vdb”

]

},

{

“node”: {

“hostnames”: {

“manage”: [

“192.168.90.217”

],

“storage”: [

“192.168.90.217”

]

},

“zone”: 2

},

“devices”: [

“/dev/vdb”

]

},

{

“node”: {

"hostnames": {

"manage": [

"192.168.90.216"

],

"storage": [

"192.168.90.216"

]

},

"zone": 3

},

"devices": [

"/dev/vdb"

]

}

]

}

]

}

```

6. 通过topology.json组建GlusterFS集群

```code

[root@master ~]# heketi-cli --server http://localhost:8080 --user admin --secret admin@key topology load --json=/etc/heketi/topology.json

Creating cluster ... ID: 2865ef5ac77aae777bbfaf3f27e456ef

Allowing file volumes on cluster.

Allowing block volumes on cluster.

Creating node 172.16.208.210 ... ID: 474894862effef22952e7c0d4542605b

Adding device /dev/vdb ... OK

Creating node 172.16.208.211 ... ID: 156c6b793ef761f68b317d0cfe8e7ec1

Adding device /dev/vdb ... OK

[root@master ~]# heketi-cli --server http://localhost:8080 --user admin --secret admin@key topology info

```

7. 配置StorageClass

```code

[root@master ~]# cat gluster-heketi-secret.yaml

apiVersion: v1

kind: Secret

metadata:

name: heketi-secret

namespace: default

data:

# base64 encoded password. E.g.: echo -n "mypassword" | base64

key: *

type: kubernetes.io/glusterfs

[root@master ~]# kubectl apply -f gluster-heketi-secret.yaml

secret/heketi-secret created

[root@master ~]# cat gluster-heketi-storageclass.yaml

apiVersion: storage.k8s.io/v1

kind: StorageClass

metadata:

name: gluster-heketi-storageclass

provisioner: kubernetes.io/glusterfs

reclaimPolicy: Delete

parameters:

resturl: "http://192.168.*.*:8080"

restauthenabled: "true"

restuser: "admin"

secretNamespace: "default"

secretName: "heketi-secret"

volumetype: "replicate:2"

[root@master ~]# kubectl apply -f gluster-heketi-storageclass.yaml

storageclass.storage.k8s.io/gluster-heketi-storageclass created

```

8. 测试

```code

[root@master ~]# cat test-pvc.yaml

kind: PersistentVolumeClaim

apiVersion: v1

metadata:

name: test-claim

annotations:

volume.beta.kubernetes.io/storage-class: "gluster-heketi-storageclass"

spec:

accessModes:

- ReadWriteMany

resources:

requests:

storage: 1Gi

```