k8s使用Glusterfs动态生成pv
Posted zhangb8042
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一、环境介绍
[[email protected] ~]# 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
[[email protected] ~]# 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
#删除k8s集群master的污点（我这边就三台服务器，需要使用master，生产环境千万别这么干）
[[email protected] ~]# kubectl taint node k8s-m node-role.kubernetes.io/master-
node/k8s-m untainted
所有存储服务器下载
yum install centos-release-gluster -y
yum install glusterfs-server -y
二、Heketi安装
所有版本：https://github.com/heketi/heketi/releases
#下载安装 wget https://github.com/heketi/heketi/releases/download/v8.0.0/heketi-v8.0.0.linux.amd64.tar.gz tar 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/ #我们glusterFS部署在k8s集群外，所以heketi通过ssh管理glusterFS。需要创建免秘钥登陆到所有glusterFS节点。 ssh-keygen -f /data/heketi/conf/heketi_key -t rsa -N ‘‘ #将公钥放到所有GlusterFS节点 ssh-copy-id -i /data/heketi/conf/heketi_key.pub [email protected]m ssh-copy-id -i /data/heketi/conf/heketi_key.pub [email protected] ssh-copy-id -i /data/heketi/conf/heketi_key.pub [email protected]
2、heketi.json配置文件
[[email protected] ~]# 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、创建heketi启动脚本
[[email protected] ~]# 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 #启动heketi systemctl start heketi systemctl enable heketi systemctl status heketi
4、Heketi添加cluster
[[email protected] ~]# /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、#将3个glusterfs节点作为node添加到cluster
[[email protected] ~]# /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 [[email protected]-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
[[email protected]-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
#机器只是作为gluster的运行单元，volume是基于device创建的。同时需要特别说明的是，目前heketi仅支持使用裸分区或裸磁盘(未格式化)添加为device，不支持文件系统
[[email protected] ~]# /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 [[email protected]-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 [[email protected]-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 [[email protected]-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
创建一个大小为3G，副本为3的volume [[email protected] ~]# /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、创建storageclass
[[email protected] ~]# 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" #导入 [[email protected]-m ~]# kubectl apply -f storageclass-glusterfs.yaml secret/heketi-secret created storageclass.storage.k8s.io/glusterfs created
9、创建一个 statefulset测试是否会自动生成pv
#查看pv和pvc [[email protected]-m ~]# kubectl get pv --all-namespaces No resources found. [[email protected]-m ~]# kubectl get pvc --all-namespaces No resources found. #statefulset文件 [[email protected]-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(根据pvc自动创建了pv) [[email protected]-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 [[email protected]-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
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