k8s使用Glusterfs動態生成pv
阿新 • • 發佈：2019-01-11
目前 username main ack system rfs cto space output
一、環境介紹
[root@k8s-m ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
172.31.250.152 k8s-m
172.31.250.153 node1
172.31.250.154 node2
[root@k8s-m ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s-m Ready master 41m v1.13.1
node1 Ready <none> 27m v1.13.1
node2 Ready <none> 28m v1.13.1
#刪除k8s集群master的汙點（我這邊就三臺服務器，需要使用master，生產環境千萬別這麽幹）
[root@k8s-m ~]# kubectl taint node k8s-m node-role.kubernetes.io/master-
node/k8s-m untainted
所有存儲服務器下載
yum install centos-release-gluster -y
yum install glusterfs-server -y
二、Heketi安裝
所有版本：https://github.com/heketi/heketi/releases
#下載安裝 wget https://github.com/heketi/heketi/releases/download/v8.0.0/heketi-v8.0.0.linux.amd64.tar.gztar xf heketi-v8.0.0.linux.amd64.tar.gz mkdir -p /data/heketi/{bin,conf,data} cp heketi/heketi.json /data/heketi/conf/ cp heketi/{heketi,heketi-cli} /data/heketi/bin/ #我們glusterFS部署在k8s集群外，所以heketi通過ssh管理glusterFS。需要創建免秘鑰登陸到所有glusterFS節點。 ssh-keygen -f /data/heketi/conf/heketi_key -t rsa -N ‘‘ #將公鑰放到所有GlusterFS節點ssh-copy-id -i /data/heketi/conf/heketi_key.pub root@k8s-m ssh-copy-id -i /data/heketi/conf/heketi_key.pub root@node1 ssh-copy-id -i /data/heketi/conf/heketi_key.pub root@node2
2、heketi.json配置文件
[root@k8s-m ~]# cat /data/heketi/conf/heketi.json
{
"_port_comment": "Heketi Server Port Number",
"port": "18080",
"_enable_tls_comment": "Enable TLS in Heketi Server",
"enable_tls": false,
"_cert_file_comment": "Path to a valid certificate file",
"cert_file": "",
"_key_file_comment": "Path to a valid private key file",
"key_file": "",
"_use_auth": "Enable JWT authorization. Please enable for deployment",
"use_auth": true,
"_jwt": "Private keys for access",
"jwt": {
"_admin": "Admin has access to all APIs",
"admin": {
"key": "adminkey"
},
"_user": "User only has access to /volumes endpoint",
"user": {
"key": "userkey"
}
},
"_backup_db_to_kube_secret": "Backup the heketi database to a Kubernetes secret when running in Kubernetes. Default is off.",
"backup_db_to_kube_secret": false,
"_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": "ssh",
"_sshexec_comment": "SSH username and private key file information",
"sshexec": {
"keyfile": "/data/heketi/conf/heketi_key",
"user": "root",
"port": "22",
"fstab": "/etc/fstab",
"backup_lvm_metadata": false
},
"_kubeexec_comment": "Kubernetes configuration",
"kubeexec": {
"host" :"https://kubernetes.host: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",
"backup_lvm_metadata": false
},
"_db_comment": "Database file name",
"db": "/data/heketi/data/heketi.db",
"_refresh_time_monitor_gluster_nodes": "Refresh time in seconds to monitor Gluster nodes",
"refresh_time_monitor_gluster_nodes": 120,
"_start_time_monitor_gluster_nodes": "Start time in seconds to monitor Gluster nodes when the heketi comes up",
"start_time_monitor_gluster_nodes": 10,
"_loglevel_comment": [
"Set log level. Choices are:",
" none, critical, error, warning, info, debug",
"Default is warning"
],
"loglevel" : "debug",
"_auto_create_block_hosting_volume": "Creates Block Hosting volumes automatically if not found or exsisting volume exhausted",
"auto_create_block_hosting_volume": true,
"_block_hosting_volume_size": "New block hosting volume will be created in size mentioned, This is considered only if auto-create is enabled.",
"block_hosting_volume_size": 500,
"_block_hosting_volume_options": "New block hosting volume will be created with the following set of options. Removing the group gluster-block option is NOT recommended. Additional options can be added next to it separated by a comma.",
"block_hosting_volume_options": "group gluster-block"
}
}
3、創建heketi啟動腳本
[root@k8s-m ~]# cat /usr/lib/systemd/system/heketi.service [Unit] Description=RESTful based volume management framework for GlusterFS Before=network-online.target After=network-online.target Documentation=https://github.com/heketi/heketi [Service] Type=simple LimitNOFILE=65536 ExecStart=/data/heketi/bin/heketi --config=/data/heketi/conf/heketi.json KillMode=process Restart=on-failure RestartSec=5 SuccessExitStatus=15 StandardOutput=syslog StandardError=syslog [Install] WantedBy=multi-user.target #啟動heketi systemctl start heketi systemctl enable heketi systemctl status heketi
4、Heketi添加cluster
[root@k8s-m ~]# /data/heketi/bin/heketi-cli --user admin --server http://k8s-m:18080 --secret adminkey --json cluster create {"id":"aa378f94299c29bbd0224fc902c0cbd8","nodes":[],"volumes":[],"block":true,"file":true,"blockvolumes":[]}
5、#將3個glusterfs節點作為node添加到cluster
[root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" node add --cluster "aa378f94299c29bbd0224fc902c0cbd8" --management-host-name k8s-m --storage-host-name 172.31.250.152 --zone 1 Node information: Id: 9280cde1c2640bf3fef483509a04bff2 State: online Cluster Id: aa378f94299c29bbd0224fc902c0cbd8 Zone: 1 Management Hostname k8s-m Storage Hostname 172.31.250.152 [root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" node add --cluster "aa378f94299c29bbd0224fc902c0cbd8" --management-host-name node1 --storage-host-name 172.31.250.153 --zone 1 Node information: Id: 19838aea8104aee077b0ea67cd6ea012 State: online Cluster Id: aa378f94299c29bbd0224fc902c0cbd8 Zone: 1 Management Hostname node1 Storage Hostname 172.31.250.153
[root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" node add --cluster "aa378f94299c29bbd0224fc902c0cbd8" --management-host-name node2 --storage-host-name 172.31.250.154 --zone 1 Node information: Id: 171aeb876968bf9ef1fab28e6a31e919 State: online Cluster Id: aa378f94299c29bbd0224fc902c0cbd8 Zone: 1 Management Hostname node2 Storage Hostname 172.31.250.154
6、添加device
#機器只是作為gluster的運行單元，volume是基於device創建的。同時需要特別說明的是，目前heketi僅支持使用裸分區或裸磁盤(未格式化)添加為device，不支持文件系統
[root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" --json device add --name="/dev/vdb" --node "9280cde1c2640bf3fef483509a04bff2" Device added successfully [root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" --json device add --name="/dev/vdb" --node "19838aea8104aee077b0ea67cd6ea012" Device added successfully [root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" --json device add --name="/dev/vdb" --node "171aeb876968bf9ef1fab28e6a31e919" Device added successfully ##查看 [root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" node list Id:171aeb876968bf9ef1fab28e6a31e919 Cluster:aa378f94299c29bbd0224fc902c0cbd8 Id:19838aea8104aee077b0ea67cd6ea012 Cluster:aa378f94299c29bbd0224fc902c0cbd8 Id:9280cde1c2640bf3fef483509a04bff2 Cluster:aa378f94299c29bbd0224fc902c0cbd8
7、添加volume
創建一個大小為3G，副本為3的volume [root@k8s-m ~]# /data/heketi/bin/heketi-cli --server http://k8s-m:18080 --user "admin" --secret "adminkey" volume create --size 3 --replica 3 Name: vol_2aab01a26b3a2dfc1286eed16c8fcb62 Size: 3 Volume Id: 2aab01a26b3a2dfc1286eed16c8fcb62 Cluster Id: aa378f94299c29bbd0224fc902c0cbd8 Mount: 172.31.250.154:vol_2aab01a26b3a2dfc1286eed16c8fcb62 Mount Options: backup-volfile-servers=172.31.250.153,172.31.250.152 Block: false Free Size: 0 Reserved Size: 0 Block Hosting Restriction: (none) Block Volumes: [] Durability Type: replicate Distributed+Replica: 3
8、創建storageclass
[root@k8s-m ~]# cat storageclass-glusterfs.yaml apiVersion: v1 kind: Secret metadata: name: heketi-secret namespace: default data: # base64 encoded password. E.g.: echo -n "mypassword" | base64 key: YWRtaW5rZXk= type: kubernetes.io/glusterfs --- apiVersion: storage.k8s.io/v1beta1 kind: StorageClass metadata: name: glusterfs provisioner: kubernetes.io/glusterfs allowVolumeExpansion: true parameters: resturl: "http://172.31.250.152:18080" clusterid: "aa378f94299c29bbd0224fc902c0cbd8" restauthenabled: "true" restuser: "admin" #secretNamespace: "default" #secretName: "heketi-secret" restuserkey: "adminkey" gidMin: "40000" gidMax: "50000" volumetype: "replicate:3" #導入 [root@k8s-m ~]# kubectl apply -f storageclass-glusterfs.yaml secret/heketi-secret created storageclass.storage.k8s.io/glusterfs created
9、創建一個 statefulset測試是否會自動生成pv
#查看pv和pvc [root@k8s-m ~]# kubectl get pv --all-namespaces No resources found. [root@k8s-m ~]# kubectl get pvc --all-namespaces No resources found. #statefulset文件 [root@k8s-m ~]# cat mystatefulset.yaml apiVersion: v1 kind: Service metadata: name: nginx labels: app: nginx spec: ports: - port: 80 name: web clusterIP: None selector: app: nginx --- apiVersion: apps/v1 kind: StatefulSet metadata: name: nginx spec: selector: matchLabels: app: nginx # has to match .spec.template.metadata.labels serviceName: "nginx" replicas: 3 # by default is 1 template: metadata: labels: app: nginx # has to match .spec.selector.matchLabels spec: terminationGracePeriodSeconds: 10 containers: - name: nginx image: nginx ports: - containerPort: 80 name: web volumeMounts: - name: www mountPath: /usr/share/nginx/html volumeClaimTemplates: - metadata: name: www spec: accessModes: [ "ReadWriteOnce" ] storageClassName: "glusterfs" resources: requests: storage: 2Gi #查看pv和pvc(根據pvc自動創建了pv) [root@k8s-m ~]# kubectl get pv NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE pvc-0afdc43a-1567-11e9-b8f6-00163e024454 2Gi RWO Delete Bound default/www-nginx-0 glusterfs 6s [root@k8s-m ~]# kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE www-nginx-0 Bound pvc-0afdc43a-1567-11e9-b8f6-00163e024454 2Gi RWO glusterfs 16s
k8s使用Glusterfs動態生成pv