Kubernetes——part8-2 k8s集群存储解决方案 GlusterFS
一、存储解决方案介绍
1.1 GlusterFS
- GlusterFS是一个开源的分布式文件系统
- 具有强大的横向扩展能力
- 通过扩展能够支持数PB存储容量和处理数千客户端
- GlusterFS借助TCP/IP或InfiniBandRDMA网络将物理分布的存储资源聚集在一起，使用单一全局命名空间来管理数据。
1.2 Heketi
-
Heketi（https://github.com/heketi/heketi），是一个基于RESTful API的GlusterFS卷管理框架。
-
Heketi可以方便地和云平台整合，提供RESTful API供Kubernetes调用，实现多GlusterFS集群的卷管理
-
Heketi还有保证bricks和它对应的副本均匀分布在集群中的不同可用区的优点。
二、环境说明
2.1 k8s集群
| kubeadm | kubelet | kubectl | docker | 节点数 |
|---|---|---|---|---|
| v1.21.10 | v1.21.10 | v1.21.10 | 20.10-17 | 3;1master2slave |
| 主机 | IP地址 | Heketi |
|---|---|---|
| master01 | 192.168.10.11 | heketi heketi-client |
| worker01 | 192.168.10.12 | heketi-client |
| worker02 | 192.168.10.13 | heketi-client |
2.2 GlusterFS集群
| 主机 | IP地址 | 硬盘 | 硬盘容量 |
|---|---|---|---|
| g1 | 192.168.10.60 | /dev/sdb | 100G |
| g2 | 192.168.10.61 | /dev/sdb | 100G |
| g3 | 192.168.10.62 | /dev/sdb | 100G |
三、GlusterFS集群部署
3.1 主机准备
3.1.1 主机名配置
[root@localhost ~]# hostnamectl set-hostname gX
X为1，2，3
3.1.2 IP配置
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.10.6X
NETMASK=255.255.255.0
GATEWAY=192.168.10.2
DNS1=119.29.29.29
X为0，1，2
3.1.3 主机名解析设置
[root@localhost ~]# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.60 g1
192.168.10.61 g2
192.168.10.62 g3
3.1.4 主机间免密登录设置
在g1主机操作，然后copy到其它主机即可。
[root@g1 ~]# ssh-keygen -t rsa -f /root/.ssh/id_rsa -N ''
Generating public/private rsa key pair.
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:FuKHUe57eCqUjIwH9q9zXNsQt/6BHDNZcSOixGBHXs0 root@g1
The key's randomart image is:
+---[RSA 2048]----+
| o+= ooo o |
| . *.o .E+ . |
| o = . |
| o . =...o |
| . = oo.So=. |
| . = +oo+.= |
| . + .o== . |
| . = .+o . |
| .+ .. .. |
+----[SHA256]-----+
[root@g1 ~]# cd /root/.ssh
[root@g1 .ssh]# ls
id_rsa id_rsa.pub
[root@g1 .ssh]# cp id_rsa.pub authorized_keys
[root@g1 .ssh]# ls
authorized_keys id_rsa id_rsa.pub
[root@g1 .ssh]# cd ..
[root@g1 ~]# scp -r /root/.ssh g2:/root
[root@g1 ~]# scp -r /root/.ssh g3:/root
3.1.5 硬盘准备
3.1.5.1 查看硬盘
所有GlusterFS集群节点全部操作，仅在g1主机演示操作方法。
[root@gX ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 252:0 0 20G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 252:16 0 100G 0 disk
3.1.5.2 格式化硬盘
[root@gX ~]# mkfs.xfs /dev/sdb
meta-data=/dev/sdb isize=512 agcount=4, agsize=6553600 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=26214400, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=12800, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
3.1.6 硬盘自动挂载准备
3.1.6.1 准备挂载目录
[root@g1 ~]# mkdir /glustersdb
[root@g2 ~]# mkdir /glustersdb
[root@g3~]# mkdir /glustersdb
3.1.6.2 修改/etc/fstab文件实现自动挂载
[root@gX ~]# cat /etc/fstab
......
/dev/sdb /glustersdb xfs defaults 0 0
挂载所有
[root@gX ~]# mount -a
查看文件系统挂载情况
[root@gX ~]# df -h
文件系统 容量 已用 可用 已用% 挂载点
/dev/mapper/centos-root 17G 1.1G 16G 7% /
devtmpfs 988M 0 988M 0% /dev
tmpfs 1000M 0 1000M 0% /dev/shm
tmpfs 1000M 8.6M 991M 1% /run
tmpfs 1000M 0 1000M 0% /sys/fs/cgroup
/dev/vda1 1014M 133M 882M 14% /boot
tmpfs 98M 0 98M 0% /run/user/0
/dev/sdb 100G 33M 100G 1% /glustersdb
3.2 安全设置
3.2.1 firewalld设置
[root@gX ~]# systemctl disable firewalld
[root@gX ~]# systemctl stop firewalld
[root@gX ~]# firewall-cmd --state
not running
3.2.2 SELinux设置
所有主机均要修改，修改后，请重启系统让修改生效。
[root@gX ~]# sed -ri 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
3.3 时间同步设置
[root@gX ~]# crontab -l
0 */1 * * * ntpdate time1.aliyun.com
3.4 GlusterFS安装
3.4.1 YUM源准备
[root@gX ~]# yum -y install centos-release-gluster
[root@gX ~]# ls /etc/yum.repos.d/
CentOS-Gluster-7.repo CentOS-Storage-common.repo tuna.repo
3.4.2 GlusterFS安装
关于软件的依赖，待补充。
[root@gX ~]# yum -y install glusterfs glusterfs-server glusterfs-fuse glusterfs-rdma fuse
3.4.3 启动GlusterFS 服务
[root@gX ~]# systemctl enable glusterd
[root@gX ~]# systemctl start glusterd
3.5 GlusterFS集群配置
在GlusterFS集群g1主机上添加g2和g3 2台主机。
[root@g1 ~]# gluster peer probe g2
peer probe: success.
[root@g1 ~]# gluster peer probe g3
peer probe: success.
[root@g1 ~]# gluster peer status
Number of Peers: 2
Hostname: g2
Uuid: 7660736f-056b-414e-8b0c-b5272265946c
State: Peer in Cluster (Connected)
Hostname: g3
Uuid: 75b7c358-edbe-438c-ad72-2ce16ffabf9d
State: Peer in Cluster (Connected)
[root@g2 ~]# gluster peer status
Number of Peers: 2
Hostname: g1
Uuid: 920e9070-1336-4bff-8bfd-eb6161d035d3
State: Peer in Cluster (Connected)
Hostname: g3
Uuid: 75b7c358-edbe-438c-ad72-2ce16ffabf9d
State: Peer in Cluster (Connected)
[root@g3 ~]# gluster peer status
Number of Peers: 2
Hostname: g1
Uuid: 920e9070-1336-4bff-8bfd-eb6161d035d3
State: Peer in Cluster (Connected)
Hostname: g2
Uuid: 7660736f-056b-414e-8b0c-b5272265946c
State: Peer in Cluster (Connected)
3.6 添加复制卷验证GlusterFS集群可用性
如果是为K8S集群提供持久化存储，请不要再继续验证GlusterFS集群可用性或验证完成后，重新添加硬盘。
在GlusterFS集群任意节点均可完成
3.6.1 创建复制卷
[root@g1 ~]# gluster volume create k8s-test-volume replica 3 g1:/glustersdb/r1 g2:/glustersdb/r2 g3:/glustersdb/r3
volume create: k8s-test-volume: success: please start the volume to access data
[root@g1 ~]# ls /glustersdb
r1
[root@g2 ~]# ls /glustersdb
r2
[root@g3 ~]# ls /glustersdb
r3
3.6.2 启动复制卷
[root@g1 ~]# gluster volume start k8s-test-volume
volume start: k8s-test-volume: success
3.6.3 查询复制卷状态
[root@g1 ~]# gluster volume status k8s-test-volume
Status of volume: k8s-test-volume
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick g1:/glustersdb/r1 49152 0 Y 6622
Brick g2:/glustersdb/r2 49152 0 Y 6518
Brick g3:/glustersdb/r3 49152 0 Y 6518
Self-heal Daemon on localhost N/A N/A Y 6643
Self-heal Daemon on g3 N/A N/A Y 6539
Self-heal Daemon on g2 N/A N/A Y 6539
Task Status of Volume k8s-test-volume
------------------------------------------------------------------------------
There are no active volume tasks
3.6.4 查看复制卷信息
[root@g1 ~]# gluster volume info k8s-test-volume
Volume Name: k8s-test-volume
Type: Replicate
Volume ID: 0529c5f6-1ac0-40ea-a29c-6c4f85dc54cb
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 3 = 3
Transport-type: tcp
Bricks:
Brick1: g1:/glustersdb/r1
Brick2: g2:/glustersdb/r2
Brick3: g3:/glustersdb/r3
Options Reconfigured:
transport.address-family: inet
storage.fips-mode-rchecksum: on
nfs.disable: on
performance.client-io-threads: off
3.6.5 如果某一个brick不在线会影响客户端挂载(可选)
设置后，可以允许volume中的某块brick不在线的情况
[root@g1 glusterfs]# gluster volume set k8s-test-volume cluster.server-quorum-type none
volume set: success
[root@g1 glusterfs]# gluster volume set k8s-test-volume cluster.quorum-type none
volume set: success
3.6.6 限额问题(可选)
[root@g1 ~]# gluster volume quota k8s-test-volume enable
volume quota : success
[root@g1 ~]# gluster volume quota k8s-test-volume limit-usage / 10GB
volume quota : success
3.7 在k8s集群工作节点验证GlusterFS集群可用性
由于仅使用一个工作节点验证GlusterFS集群可用性，因此没有必要为所有工作节点全部安装GlusterFS客户端。
3.7.1 准备YUM源
[root@worker01 ~]# yum -y install centos-release-gluster
3.7.2 在k8s集群work1节点安装glusterfs
[root@worker01 ~]# yum -y install glusterfs glusterfs-fuse
3.7.3 创建用于挂载目录
[root@worker01 ~]# mkdir /k8s-glusterfs-test-volume
3.7.4 手动挂载GlusterFS集群中的复制卷
如果使用主机名挂载，g1,g2,g3主机名需要添加到解析。
[root@worker01 ~]# mount -t glusterfs g1:/k8s-test-volume /k8s-glusterfs-test-volume
3.7.5 验证挂载情况
[root@worker01 ~]# df -h
文件系统 容量 已用 可用 已用% 挂载点
......
g1:/k8s-test-volume 100G 1.1G 99G 2% /k8s-glusterfs-test-volume
3.7.6 验证完成后需要卸载
[root@worker01 ~]# umount /k8s-glusterfs-test-volume
四、Heketi安装
heketi是为glusterfs提供RESETFUL的API， 相当于给glusterfs和k8s之间架通了桥梁。k8s集群可以通过heketi提供的RESETFUL API完成对Glusterfs的PV申请和管理。
4.1 配置Heketi YUM源
k8s集群所有节点均需要
[root@master01 ~]# yum -y install centos-release-gluster
[root@worker01 ~]# yum -y install centos-release-gluster
[root@worker02 ~]# yum -y install centos-release-gluster
4.2 安装Heketi
4.2.1 k8s集群master节点安装
[root@master01 ~]# yum -y install heketi heketi-client
4.2.2 k8s集群工作节点安装
[root@worker01 ~]# yum -y install heketi-client
[root@worker02 ~]# yum -y install heketi-client
4.3 在k8s集群master节点修改Heketi配置文件
4.3.1 在k8s集群master节点查看并备份文件
[root@master01 ~]# ls /etc/heketi/
heketi.json
[root@master01 ~]# cp /etc/heketi/heketi.json{,.bak}
[root@master01 ~]# ls /etc/heketi/
heketi.json heketi.json.bak
4.3.2 在k8s集群master节点修改配置文件
[root@master01 ~]# cat /etc/heketi/heketi.json
{
"_port_comment": "Heketi Server Port Number",
"port": "18080", 修改为18080，防止与其它端口冲突
"_use_auth": "Enable JWT authorization. Please enable for deployment",
"use_auth": true, 开启用户认证
"_jwt": "Private keys for access",
"jwt": {
"_admin": "Admin has access to all APIs",
"admin": {
"key": "adminkey" 用户认证的key
},
"_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": "ssh", 访问glusterfs集群的方法
"_sshexec_comment": "SSH username and private key file information",
"sshexec": {
"keyfile": "/etc/heketi/heketi_key", 访问glusterfs集群使用的私钥，需要提前在k8s集群master节点生成并copy到glusterfs集群所有节点,需要从/root/.ssh/id_rsa复制到此处才可以使用。
"user": "root", 认证使用的用户
"port": "22", ssh连接使用的端口
"fstab": "/etc/fstab" 挂载的文件系统
},
"_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"
},
"_db_comment": "Database file name",
"db": "/var/lib/heketi/heketi.db", 数据库位置
"_loglevel_comment": [
"Set log level. Choices are:",
" none, critical, error, warning, info, debug",
"Default is warning"
],
"loglevel" : "warning" 修改日志级别
}
}
需要说明的是，heketi有三种executor，分别为mock、ssh、kubernetes，建议在测试环境使用mock，生产环境使用ssh，当glusterfs以容器的方式部署在kubernetes上时，才使用kubernetes。我们这里将glusterfs和heketi独立部署，使用ssh的方式。
4.4 配置ssh密钥
在上面我们配置heketi的时候使用了ssh的executor，那么就需要heketi服务器能通过ssh密钥的方式连接到所有glusterfs节点进行管理操作，所以需要先生成ssh密钥
4.4.1 生成密钥
[root@master01 ~]# ssh-keygen -t rsa -f /root/.ssh/id_rsa -N ''
Generating public/private rsa key pair.
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:EG1ql3V+ExAqMTubL4AqSgCMGZ0mZliSsVH2n83TT28 root@master01
The key's randomart image is:
+---[RSA 2048]----+
|**+. ..o oo |
|*X+. .o+... . |
|B+ . .o+o.o . |
|. oo=o* . o |
|. ..+.S . .. . |
|. . . o o . |
|... . . . E |
|o. . . |
|. |
+----[SHA256]-----+
4.4.2 复制密钥到远程主机
[root@master01 ~]# ssh-copy-id 192.168.10.60
[root@master01 ~]# ssh-copy-id 192.168.10.61
[root@master01 ~]# ssh-copy-id 192.168.10.62
4.4.3 验证密钥的可用性
[root@master01 ~]# ssh 192.168.10.60
Last login: Wed Jan 29 20:17:39 2020 from 192.168.10.1
[root@g1 ~]# exit
登出
Connection to 192.168.10.60 closed.
[root@master01 ~]# ssh 192.168.10.61
Last login: Wed Jan 29 20:17:51 2020 from 192.168.10.1
[root@g2 ~]# exit
登出
Connection to 192.168.10.61 closed.
[root@master01 ~]# ssh 192.168.10.62
Last login: Wed Jan 29 20:18:04 2020 from 192.168.10.1
[root@g3 ~]# exit
登出
Connection to 192.168.10.62 closed.
4.4.4 复制私密到/etc/heketi目录
[root@master01 ~]# cp .ssh/id_rsa /etc/heketi/heketi_key
[root@master01 ~]# ls /etc/heketi/
heketi.json heketi.json.bak heketi_key
4.5 启动Heketi
默认yum安装后，/etc/heketi及/var/lib/heketi目录所有者是root, 但是安装提供的service文件的user又是heketi. 导致不修改权限就是启动不起来,因此需要修改权限再启动服务。
[root@master01 heketi]# chown heketi:heketi /etc/heketi/ -R || chown heketi:heketi /var/lib/heketi -R
[root@master01 ~]# systemctl enable heketi
[root@master01 ~]# systemctl start heketi
[root@master01 ~]# systemctl status heketi
● heketi.service - Heketi Server
Loaded: loaded (/usr/lib/systemd/system/heketi.service; enabled; vendor preset: disabled)
Active: active (running) since 三 2020-01-29 22:13:52 CST; 2min 31s ago
Main PID: 23664 (heketi)
Tasks: 11
Memory: 8.8M
CGroup: /system.slice/heketi.service
└─23664 /usr/bin/heketi --config=/etc/heketi/heketi.json
1月 29 22:13:52 master01 systemd[1]: Started Heketi Server.
1月 29 22:13:52 master01 heketi[23664]: Heketi 9.0.0
1月 29 22:13:52 master01 heketi[23664]: Authorization loaded
1月 29 22:13:52 master01 heketi[23664]: Listening on port 18080
4.6 验证Heketi
验证是否可以创建集群
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 --json cluster create
{"id":"1c8824939237ea79aa17a127e958fc92","nodes":[],"volumes":[],"block":true,"file":true,"blockvolumes":[]}
删除已创建的集群
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 --json cluster delete 1c8824939237ea79aa17a127e958fc92
Cluster 1c8824939237ea79aa17a127e958fc92 deleted
4.7 创建集群
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 --json cluster create
{"id":"dd456dbc15f1206e980fdb5345117085","nodes":[],"volumes":[],"block":true,"file":true,"blockvolumes":[]}
说明
192.168.10.11 为在k8s集群master节点IP
4.8 添加节点
添加g1
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 --json node add --cluster "dd456dbc15f1206e980fdb5345117085" --management-host-name 192.168.10.60 --storage-host-name 192.168.10.60 --zone 1
{"zone":1,"hostnames":{"manage":["192.168.10.60"],"storage":["192.168.10.60"]},"cluster":"dd456dbc15f1206e980fdb5345117085","id":"217899105fa01434f9f29625e7ad9cfb","state":"online","devices":[]}
添加g2
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 --json node add --cluster "dd456dbc15f1206e980fdb5345117085" --management-host-name 192.168.10.61 --storage-host-name 192.168.10.61 --zone 1
{"zone":1,"hostnames":{"manage":["192.168.10.61"],"storage":["192.168.10.61"]},"cluster":"dd456dbc15f1206e980fdb5345117085","id":"b8cb7ce3f753fea41bb170f2639a1554","state":"online","devices":[]}
添加g3
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 --json node add --cluster "dd456dbc15f1206e980fdb5345117085" --management-host-name 192.168.10.62 --storage-host-name 192.168.10.62 --zone 1
{"zone":1,"hostnames":{"manage":["192.168.10.62"],"storage":["192.168.10.62"]},"cluster":"dd456dbc15f1206e980fdb5345117085","id":"bd7637215a852092583d7e5cd84b6c9e","state":"online","devices":[]}
查看集群中node列表
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 node list
Id:217899105fa01434f9f29625e7ad9cfb Cluster:dd456dbc15f1206e980fdb5345117085
Id:b8cb7ce3f753fea41bb170f2639a1554 Cluster:dd456dbc15f1206e980fdb5345117085
Id:bd7637215a852092583d7e5cd84b6c9e Cluster:dd456dbc15f1206e980fdb5345117085
4.9 添加设备
4.9.1 错误的示范
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 device add --name "/dev/sdb" --node 217899105fa01434f9f29625e7ad9cfb
Error: Setup of device /dev/sdb failed (already initialized or contains data?): Can't open /dev/sdb exclusively. Mounted filesystem?
Can't open /dev/sdb exclusively. Mounted filesystem?
4.9.2 添加新硬盘
如果没有做使用测试，可以不操作此步骤。
[root@g1 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 252:0 0 20G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 252:16 0 100G 0 disk /glustersdb
sdc 252:32 0 50G 0 disk
[root@g2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 252:0 0 20G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 252:16 0 100G 0 disk /glustersdb
sdc 252:32 0 50G 0 disk
[root@g3 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
vda 252:0 0 20G 0 disk
├─vda1 252:1 0 1G 0 part /boot
└─vda2 252:2 0 19G 0 part
├─centos-root 253:0 0 17G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 252:16 0 100G 0 disk /glustersdb
sdc 252:32 0 50G 0 disk
4.9.3 添加GlusterFS集群节点中的设备到Heketi集群
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 device add --name "/dev/sdc" --node 217899105fa01434f9f29625e7ad9cfb
Device added successfully
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 device add --name "/dev/sdc" --node b8cb7ce3f753fea41bb170f2639a1554
Device added successfully
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 device add --name "/dev/sdc" --node bd7637215a852092583d7e5cd84b6c9e
Device added successfully
4.9.4 验证节点及设备添加情况
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 topology info
或
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 topology info --json
4.10 测试通过Heketi在GlusterFS集群中添加volume
4.10.1 在k8s集群master节点查看是否有volume
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 volume list
4.10.2 在k8s集群master节点创建volume
获取帮助
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 volume create -h
创建一个复制卷，共5G大小。卷的名称自动生成。
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 volume create --size=5 --replica=2
Name: vol_80539c6510a73f70ad3453c221901334
Size: 5
Volume Id: 80539c6510a73f70ad3453c221901334
Cluster Id: dd456dbc15f1206e980fdb5345117085
Mount: 192.168.10.60:vol_80539c6510a73f70ad3453c221901334
Mount Options: backup-volfile-servers=192.168.10.61,192.168.10.62
Block: false
Free Size: 0
Reserved Size: 0
Block Hosting Restriction: (none)
Block Volumes: []
Durability Type: replicate
Distribute Count: 1
Replica Count: 2
验证卷是否创建
[root@master01 ~]# heketi-cli --user admin --secret adminkey --server http://192.168.10.11:18080 volume list
Id:80539c6510a73f70ad3453c221901334 Cluster:dd456dbc15f1206e980fdb5345117085 Name:vol_80539c6510a73f70ad3453c221901334
在GlusterFS集群节点中验证即可看到已创建的卷。
[root@g1 ~]# gluster volume list
k8s-test-volume
vol_80539c6510a73f70ad3453c221901334
五、K8S集群使用GlusterFS集群
提示：k8s中使用glusterfs的时候， 会根据pvc的申请自动创建对应的pv， 然后绑定。
5.1 在k8s集群master节点创建storageclass资源清单文件
[root@master01 yaml]# cat storageclass-gluserfs.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: glusterfs
provisioner: kubernetes.io/glusterfs #表示存储分配器，需要根据后端存储的不同而变更
parameters:
resturl: "http://192.168.10.11:18080" #heketi API服务提供的URL,为k8s集群master节点IP
restauthenabled: "true" #可选参数，默认为"false",heketi服务开启认证时，必须设置为"true"
restuser: "admin" #可选参数，开启认证时设置相应用户名
restuserkey: "adminkey" #可选，开启认证时设置密码
volumetype: "replicate:2" #可选参数，设置卷类型及其参数，如果未分配卷类型，则有分配器决定卷类型；如”volumetype: replicate:3”表示3副本的replicate卷，”volumetype: disperse:4:2”表示disperse卷，其中‘4’是数据，’2’是冗余校验，”volumetype: none”表示distribute卷
5.2 在k8s集群master节点应用上述资源清单文件
[root@master01 yaml]# kubectl apply -f storageclass-gluserfs.yaml
storageclass.storage.k8s.io/glusterfs created
5.3 在k8s集群master节点验证是否创建storageclass存储对象
[root@master01 yaml]# kubectl get sc
NAME PROVISIONER RECLAIMPOLICY VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION AGE
glusterfs kubernetes.io/glusterfs Delete Immediate false 48s
5.4 在k8s集群master节点创建用于创建PVC的资源清单文件
[root@master01 yaml]# cat glusterfs-pvc.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: glusterfs-mysql
namespace: default
annotations:
volume.beta.kubernetes.io/storage-class: "glusterfs"
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 2Gi
5.5 在k8s集群master节点应用上述资源清单文件
[root@master01 yaml]# kubectl apply -f glusterfs-pvc.yaml
persistentvolumeclaim/glusterfs-mysql created
5.6 在k8s集群master节点验证是否创建PVC
[root@master01 yaml]# kubectl get pv,pvc
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/pvc-77d6fca6-f284-49fb-a0f3-8f5664690562 2Gi RWX Delete Bound default/glusterfs-mysql glusterfs 2s
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/glusterfs-mysql Bound pvc-77d6fca6-f284-49fb-a0f3-8f5664690562 2Gi RWX glusterfs 3s
5.7 在k8s集群master节点创建Pod时使用上述创建的PVC
[root@master01 yaml]# cat mysql.yaml
apiVersion: v1
kind: Service
metadata:
name: mysql-svc
labels:
app: mysql-svc
spec:
ports:
- port: 3306
name: mysql
clusterIP: None
selector:
name: mysql
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: mysql
namespace: default
spec:
serviceName: mysql-svc
selector:
matchLabels:
name: mysql
replicas: 1
template:
metadata:
labels:
name: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
imagePullPolicy: IfNotPresent
env:
- name: MYSQL_ROOT_PASSWORD
value: "123456"
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: glusterfs-mysql-data
mountPath: "/var/lib/mysql"
volumes:
- name: glusterfs-mysql-data
persistentVolumeClaim:
claimName: glusterfs-mysql
[root@master01 yaml]# kubectl apply -f mysql.yaml
service/mysql-svc created
statefulset.apps/mysql created
[root@master01 ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
busybox-pod 1/1 Running 247 14d
mysql-0 1/1 Running 0 27s
nfs-client-provisioner-5786f95795-x7bcs 1/1 Running 1 30h
[root@master01 ~]# kubectl exec -it mysql-0 sh
# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.29 MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.01 sec)
mysql> create database k8sonline;
Query OK, 1 row affected (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| k8sonline |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.01 sec)
查看GlusterFS集群数据存储位置
在g1节点
[root@g1 ~]# gluster volume list
vol_80539c6510a73f70ad3453c221901334
[root@g1 ~]# gluster volume info vol_80539c6510a73f70ad3453c221901334
Volume Name: vol_80539c6510a73f70ad3453c221901334
Type: Replicate
Volume ID: 5df33cf0-093d-4a6c-9a2c-d2b4ec195c9e
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 2 = 2
Transport-type: tcp
Bricks:
Brick1: 192.168.10.61:/var/lib/heketi/mounts/vg_d62a7a4a632dd4864edc367c952d0fa9/brick_f7d134a34348c334a369b84604db9a40/brick
Brick2: 192.168.10.60:/var/lib/heketi/mounts/vg_6e8d391aec35995a4ee82e53e986bf70/brick_b4caa8e338233c536fd98966eeccce98/brick
Options Reconfigured:
user.heketi.id: 80539c6510a73f70ad3453c221901334
transport.address-family: inet
storage.fips-mode-rchecksum: on
nfs.disable: on
performance.client-io-threads: off
在g2节点
[root@g2 ~]# ls /var/lib/heketi/mounts/vg_d62a7a4a632dd4864edc367c952d0fa9/brick_834718f2a0236b913b3aa14609b34819/brick/
auto.cnf ib_buffer_pool k8sonline server-cert.pem
ca-key.pem ibdata1 mysql server-key.pem
ca.pem ib_logfile0 performance_schema sys
client-cert.pem ib_logfile1 private_key.pem
client-key.pem ibtmp1 public_key.pem
5.8 关于storageclass资源清单的扩展
以上将userkey明文写入配置文件创建storageclass的方式，官方推荐将key使用secret保存。
# glusterfs-secret.yaml内容如下：
apiVersion: v1
kind: Secret
metadata:
name: heketi-secret
namespace: default
data:
# base64 encoded password. E.g.: echo -n "mypassword" | base64
key: TFRTTkd6TlZJOEpjUndZNg==
type: kubernetes.io/glusterfs
# storageclass-glusterfs.yaml内容修改如下：
apiVersion: storage.k8s.io/v1beta1
kind: StorageClass
metadata:
name: glusterfs
provisioner: kubernetes.io/glusterfs
parameters:
resturl: "http://192.168.10.11:18080"
clusterid: "dd456dbc15f1206e980fdb5345117085"
restauthenabled: "true"
restuser: "admin"
secretNamespace: "default"
secretName: "heketi-secret"
#restuserkey: "adminkey"
gidMin: "40000"
gidMax: "50000"
volumetype: "replicate:2"
5.9 FAQ
问题
-
heketi有些卷明明存在但是却删不了
直接删除heketi存储目录/var/lib/heketi/ 下的mounts/文件夹，然后> heketi.db 清空db文件，重新来 -
Can’t initialize physical volume “/dev/sdb1” of volume group “vg1” without –ff
这是因为没有卸载之前的vg和pv,使用命令vgremove,pvremove依次删除卷组，逻辑卷即可