Ceph分布式存储系列(二):ceph-deploy方式部署三节点ceph集群

承接上文:Ceph分布式存储系列(一):Ceph工作原理及架构浅析梳理
之前都是使用Deepsea方式部署的ceph,长时间不用ceph-deploy了,这次来回顾,顺便总结下!

前言:

    ceph-deploy部署方式ceph官方通知已不再维护,没有在Nautilus(v14.x)之后的版本测试过,也不支持在centos8系列版本上运行,不过我们在centos7及6版本中还是可以使用的。
详细的可查看官方说明
官方声明:https://docs.ceph.com/en/latest/install/

ceph-deploy is a tool for quickly deploying clusters.
Important:ceph-deploy is no longer actively maintained. It is not tested on versions of Ceph newer than Nautilus. It does not support RHEL8, CentOS 8, or newer operating systems.

一、部署准备

本次使用Ceph版本:

  • Ceph:Nautilus(14.2.9)
  • Ceph-deploy:2.0.1

本次测试节点信息:

IP地址 主机名 附加磁盘(OSD) 集群角色
192.168.56.125 ceph-node1 一块10G磁盘(/dev/sdb) mon,mgr,osd0(主节点)
192.168.56.126 ceph-node2 一块10G磁盘(/dev/sdb) osd1
192.168.56.127 ceph-node3 一块10G磁盘(/dev/sdb) osd2

如果环境允许,可以用一个ceph-admin节点专门放置mon,mgr,mds等这些组件,osd放置在其他节点,更便于管理

服务器系统版本

[root@ceph-node1 ~]# cat /etc/centos-release
CentOS Linux release 7.8.2003 (Core)
1、关闭防火墙和selinux
sed -i  "s/SELINUX=enforcing/SELINUX=permissive/g" /etc/selinux/config
setenforce 0
systemctl stop firewalld
systemctl disable firewalld
2、配置hosts文件
保证集群内主机名与ip解析正常(每个节点都需要配置)
[root@ceph-node1 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.56.125  ceph-node1
192.168.56.126  ceph-node2
192.168.56.127  ceph-node3
[root@ceph-node1 ~]# ping ceph-node2
PING ceph-node2 (192.168.56.126) 56(84) bytes of data.
64 bytes from ceph-node2 (192.168.56.126): icmp_seq=1 ttl=64 time=0.616 ms
…………
3、创建部署用户及配置sudo权限(所有节点都执行)

a.考虑到使用root用户的安全性问题,所以这里创建一个 ceph-admin 普通用户做为部署及运维使用
b.再加上ceph-deploy会在节点安装软件包,所以创建的用户需要无密码 sudo 权限

[root@ceph-node1 ~]# useradd ceph-admin
[root@ceph-node1 ~]# echo "123456" | passwd --stdin ceph-admin
Changing password for user ceph-admin.
passwd: all authentication tokens updated successfully.

[root@ceph-node1 ~]# echo "ceph-admin ALL = NOPASSWD:ALL" | tee /etc/sudoers.d/ceph-admin
ceph-admin ALL = NOPASSWD:ALL
[root@ceph-node1 ~]# chmod 0440 /etc/sudoers.d/ceph-admin
[root@ceph-node1 ~]# ll /etc/sudoers.d/ceph-admin
-r--r-----. 1 root root 30 Oct 19 16:06 /etc/sudoers.d/ceph-admin

测试
[root@ceph-node1 ~]# su - ceph-admin
Last login: Mon Oct 19 16:11:51 CST 2020 on pts/0
[ceph-admin@ceph-node1 ~]$ sudo su -
Last login: Mon Oct 19 16:12:04 CST 2020 on pts/0
[root@ceph-node1 ~]# exit
logout
[ceph-admin@ceph-node1 ~]$ exit
logout
4、配置ssh无密码访问(在主节点node1上执行)
[root@ceph-node1 ~]# su - ceph-admin
[ceph-admin@ceph-node1 ~]$ ssh-keygen          (每一步都按回车,口令密码留空)
[ceph-admin@ceph-node1 ~]$ ssh-copy-id ceph-admin@ceph-node1
[ceph-admin@ceph-node1 ~]$ ssh-copy-id ceph-admin@ceph-node2
[ceph-admin@ceph-node1 ~]$ ssh-copy-id ceph-admin@ceph-node3

5、配置ntp时间同步

配置时间同步目的:因在时间一致的情况下,才可保证集群正常运行
配置时间同步方式:node1连接网络上的ntp服务器同步时间,node2,3连接node1同步时间(即node1既为ntp服务端,也为客户端)
注:ntpd启动后需要等待几分钟去同步

yum -y intall ntp(安装ntp,全部节点都需要执行)

node1节点操作:
vim /etc/ntp.conf
注释掉默认的配置项:
    #server 0.centos.pool.ntp.org iburst
    #server 1.centos.pool.ntp.org iburst
    #server 2.centos.pool.ntp.org iburst
    #server 3.centos.pool.ntp.org iburst
添加配置项:
server  ntp1.aliyun.com     #阿里云ntp服务器
server 127.127.1.0     #本地ntp服务器,配置此项是为了在外网ntp连接异常的情况下还能保证ntp正常,维护集群稳定

node2/node3节点操作:
vim /etc/ntp.conf
同样注释掉默认的server配置项:
添加配置项:
server 192.168.56.125     #node1-ntp服务器

全部节点都执行:
systemctl restart ntpd
systemctl enable ntpd

查看ntp连接情况和状态
[root@ceph-node1 ~]# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*120.25.115.20   10.137.53.7      2 u   41  128  377   30.382   -1.019   1.001
 LOCAL(0)        .LOCL.           5 l  806   64    0    0.000    0.000   0.000
 
 [root@ceph-node2 ~]# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*ceph-node1      120.25.115.20    3 u   20   64  377    2.143   33.254  10.350

[root@ceph-node1 ~]# ntpstat
synchronised to NTP server (120.25.115.20) at stratum 3
   time correct to within 27 ms
   polling server every 128 s

二、开始部署Ceph集群

1、添加阿里云的base源和epel源(所有节点都执行)
备份系统原本的源
[root@ceph-node1 ~]# mkdir /mnt/repo_bak
[root@ceph-node1 ~]# mv /etc/yum.repos.d/* /mnt/repo_bak
添加新源
[root@ceph-node1 ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[root@ceph-node1 ~]# wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
2、添加ceph的yum源(所有节点都执行)

注意事项:
这里的yum源是确定了ceph的版本,在源中的baseurl项中rpm-nautilus即代表着是ceph的nautilus版本的rpm包(nautilus是ceph的14.x版本)如果需要安装其他版本,还需要替换为其他版本号,12.x版本是luminous,13.x版本是rpm-mimic。详情可以去ceph官方源中查看:https://download.ceph.com/

vim /etc/yum.repos.d/ceph.repo
[Ceph]
name=Ceph
baseurl=http://download.ceph.com/rpm-nautilus/el7/x86_64
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://download.ceph.com/keys/release.asc
priority=1

[Ceph-noarch]
name=Ceph noarch packages
baseurl=http://download.ceph.com/rpm-nautilus/el7/noarch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://download.ceph.com/keys/release.asc
priority=1

[ceph-source]
name=Ceph source packages
baseurl=http://download.ceph.com/rpm-nautilus/el7/SRPMS
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://download.ceph.com/keys/release.asc
priority=1

更新yum缓存及系统软件
yum makecache
yum -y update

可查看ceph版本,判断yum是否配置正确

[root@ceph-node1 yum.repos.d]# yum list ceph --showduplicates |sort -r
 * updates: mirrors.cn99.com
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror
 * extras: mirrors.163.com
ceph.x86_64                         2:14.2.9-0.el7                          Ceph
ceph.x86_64                         2:14.2.8-0.el7                          Ceph
ceph.x86_64                         2:14.2.7-0.el7                          Ceph
ceph.x86_64                         2:14.2.6-0.el7                          Ceph
ceph.x86_64                         2:14.2.5-0.el7                          Ceph
ceph.x86_64                         2:14.2.4-0.el7                          Ceph
ceph.x86_64                         2:14.2.3-0.el7                          Ceph
ceph.x86_64                         2:14.2.2-0.el7                          Ceph
ceph.x86_64                         2:14.2.11-0.el7                         Ceph
ceph.x86_64                         2:14.2.1-0.el7                          Ceph
ceph.x86_64                         2:14.2.10-0.el7                         Ceph
ceph.x86_64                         2:14.2.0-0.el7                          Ceph
ceph.x86_64                         2:14.1.1-0.el7                          Ceph
ceph.x86_64                         2:14.1.0-0.el7                          Ceph
 * base: mirrors.163.com
Available Packages

[root@ceph-node1 yum.repos.d]# yum list ceph-deploy --showduplicates |sort -r
 * updates: mirrors.cn99.com
Loading mirror speeds from cached hostfile
Loaded plugins: fastestmirror
 * extras: mirrors.163.com
ceph-deploy.noarch                     2.0.1-0                       Ceph-noarch
ceph-deploy.noarch                     2.0.0-0                       Ceph-noarch
ceph-deploy.noarch                     1.5.39-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.38-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.37-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.36-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.35-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.34-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.33-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.32-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.31-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.30-0                      Ceph-noarch
ceph-deploy.noarch                     1.5.29-0                      Ceph-noarch
 * base: mirrors.163.com
Available Packages
3、安装ceph-deploy(在主节点node1上执行)
[root@ceph-node1 ~]# su - ceph-admin
[ceph-admin@ceph-node1 ~]$ sudo yum -y install python-setuptools   #安装ceph依赖包
[ceph-admin@ceph-node1 ~]$ sudo yum install ceph-deploy  (默认会选择安装2.0最新版本)

查看ceph-deploy安装版本
[root@ceph-node1 ~]# ceph-deploy --version
2.0.1
4、初始化集群(在主节点node1上执行)

创建集群安装目录(ceph-deploy部署程序会将文件输出到当前目录)

[ceph-admin@ceph-node1 ~]$ mkdir cluster
[ceph-admin@ceph-node1 ~]$ cd cluster/

创建集群(后边是指定哪些节点做为mon监视器使用,所以选择规划中部署mon的节点-node1)

[ceph-admin@ceph-node1 cluster]$ ceph-deploy new ceph-node1
[ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph-admin/.cephdeploy.conf
[ceph_deploy.cli][INFO  ] Invoked (2.0.1): /bin/ceph-deploy new ceph-node1
[ceph_deploy.cli][INFO  ] ceph-deploy options:
[ceph_deploy.cli][INFO  ]  username                      : None
[ceph_deploy.cli][INFO  ]  func                          : <function new at 0x7f14c44c9de8>
[ceph_deploy.cli][INFO  ]  verbose                       : False
[ceph_deploy.cli][INFO  ]  overwrite_conf                : False
[ceph_deploy.cli][INFO  ]  quiet                         : False
[ceph_deploy.cli][INFO  ]  cd_conf                       : <ceph_deploy.conf.cephdeploy.Conf instance at 0x7f14c3c424d0>
[ceph_deploy.cli][INFO  ]  cluster                       : ceph
[ceph_deploy.cli][INFO  ]  ssh_copykey                   : True
[ceph_deploy.cli][INFO  ]  mon                           : ['ceph-node1']
[ceph_deploy.cli][INFO  ]  public_network                : None
[ceph_deploy.cli][INFO  ]  ceph_conf                     : None
[ceph_deploy.cli][INFO  ]  cluster_network               : None
[ceph_deploy.cli][INFO  ]  default_release               : False
[ceph_deploy.cli][INFO  ]  fsid                          : None
[ceph_deploy.new][DEBUG ] Creating new cluster named ceph
[ceph_deploy.new][INFO  ] making sure passwordless SSH succeeds
[ceph-node1][DEBUG ] connection detected need for sudo
[ceph-node1][DEBUG ] connected to host: ceph-node1
[ceph-node1][DEBUG ] detect platform information from remote host
[ceph-node1][DEBUG ] detect machine type
[ceph-node1][DEBUG ] find the location of an executable
[ceph-node1][INFO  ] Running command: sudo /usr/sbin/ip link show
[ceph-node1][INFO  ] Running command: sudo /usr/sbin/ip addr show
[ceph-node1][DEBUG ] IP addresses found: [u'192.168.56.125']
[ceph_deploy.new][DEBUG ] Resolving host ceph-node1
[ceph_deploy.new][DEBUG ] Monitor ceph-node1 at 192.168.56.125
[ceph_deploy.new][DEBUG ] Monitor initial members are ['ceph-node1']
[ceph_deploy.new][DEBUG ] Monitor addrs are ['192.168.56.125']
[ceph_deploy.new][DEBUG ] Creating a random mon key...
[ceph_deploy.new][DEBUG ] Writing monitor keyring to ceph.mon.keyring...
[ceph_deploy.new][DEBUG ] Writing initial config to ceph.conf...

[ceph-admin@ceph-node1 cluster]$ ls
ceph.conf  ceph-deploy-ceph.log  ceph.mon.keyring

在当前目录下的ceph.conf中添加以下两行内容

public_network = 192.168.56.0/24
cluster_network = 192.168.56.0/24

安装Ceph包至其他节点
(其中 --no-adjust-repos 参数含义:使用本地配置的源,不更改源。以防出现问题)

[ceph-admin@ceph-node1 cluster]$ ceph-deploy install --no-adjust-repos ceph-node1 ceph-node2 ceph-node3

初始化mon节点

在2.0.1版本的ceph-deploy中在该初始化的时候就会做收集密钥的动作,无需再执行 ceph-deploy gatherkeys
{monitor-host} 这个命令

[ceph-admin@ceph-node1 cluster]$ ceph-deploy mon create-initial
5、添加OSD

如果是里边有数据的磁盘,还需先清除数据:(详细可查看 ceph-depoy disk zap --help)

列出所有节点上所有可用的磁盘
[ceph-admin@ceph-node1 cluster]$ ceph-deploy disk list ceph-node1 ceph-node2 ceph-node3
清除数据
sudo ceph-deploy disk zap {
     osd-server-name} {
     disk-name}
    eg:sudo ceph-deploy disk zap ceph-node2 /dev/sdb

如果是干净的磁盘,可忽略上边清除数据的操作,直接添加OSD即可
(我这里是新添加的/dev/sdb磁盘)

[ceph-admin@ceph-node1 cluster]$ ceph-deploy osd create --data /dev/sdb ceph-node1
[ceph-admin@ceph-node1 cluster]$ ceph-deploy osd create --data /dev/sdb ceph-node2
[ceph-admin@ceph-node1 cluster]$ ceph-deploy osd create --data /dev/sdb ceph-node3

可以看到cpeh将新增OSD创建为LVM格式加入ceph集群中

[ceph-admin@ceph-node1 cluster]$ sudo pvs
  PV         VG                                        Fmt  Attr PSize   PFree
  /dev/sdb   ceph-ab1b8533-018e-4924-8520-fdbefbb7d184 lvm2 a--  <10.00g    0
6、允许主机以管理员权限执行 Ceph 命令

将ceph-deploy命令将配置文件和 admin key复制到各个ceph节点,其他节点主机也能管理ceph集群

[ceph-admin@ceph-node1 cluster]$ ceph-deploy admin ceph-node1 ceph-node2 ceph-node3
7、部署MGR用于获取集群信息
[ceph-admin@ceph-node1 cluster]$ ceph-deploy mgr create ceph-node1

查看集群状态

[ceph-admin@ceph-node1 cluster]$ sudo ceph health detail
HEALTH_OK
[ceph-admin@ceph-node1 cluster]$ sudo ceph -s
  cluster:
    id:     e9290965-40d4-4c65-93ed-e534ae389b9c
    health: HEALTH_OK

  services:
    mon: 1 daemons, quorum ceph-node1 (age 62m)
    mgr: ceph-node1(active, since 5m)
    osd: 3 osds: 3 up (since 12m), 3 in (since 12m)

  data:
    pools:   0 pools, 0 pgs
    objects: 0 objects, 0 B
    usage:   3.0 GiB used, 27 GiB / 30 GiB avail
    pgs:

因/etc/ceph/下key文件普通用户没有读权限,所以普通用户无权直接执行ceph命令
如果需要ceph-admin普通用户也可直接调用集群,增加对ceph配置文件的读权限即可
(想要每个节点普通用户都可以执行ceph相关命令,那就所有节点都修改权限)

[ceph-admin@ceph-node1 ~]$ ll /etc/ceph/
total 12
-rw-------. 1 root root 151 Oct 21 17:33 ceph.client.admin.keyring
-rw-r--r--. 1 root root 268 Oct 21 17:35 ceph.conf
-rw-r--r--. 1 root root  92 Oct 20 04:48 rbdmap
-rw-------. 1 root root   0 Oct 21 17:30 tmpcmU035
[ceph-admin@ceph-node1 ~]$ sudo chmod +r /etc/ceph/ceph.client.admin.keyring
[ceph-admin@ceph-node1 ~]$ ll /etc/ceph/
total 12
-rw-r--r--. 1 root root 151 Oct 21 17:33 ceph.client.admin.keyring
-rw-r--r--. 1 root root 268 Oct 21 17:35 ceph.conf
-rw-r--r--. 1 root root  92 Oct 20 04:48 rbdmap
-rw-------. 1 root root   0 Oct 21 17:30 tmpcmU035
[ceph-admin@ceph-node1 ~]$ ceph -s
  cluster:
    id:     130b5ac0-938a-4fd2-ba6f-3d37e1a4e908
    health: HEALTH_OK

  services:
    mon: 1 daemons, quorum ceph-node1 (age 20h)
    mgr: ceph-node1(active, since 20h)
    osd: 3 osds: 3 up (since 20h), 3 in (since 20h)

  data:
    pools:   0 pools, 0 pgs
    objects: 0 objects, 0 B
    usage:   3.0 GiB used, 27 GiB / 30 GiB avail
    pgs:

三、配置Mgr-Dashboard模块

开启dashboard模块

[ceph-admin@ceph-node1 ~]$ sudo ceph mgr module enable dashboard

如果报错如下:

Error ENOENT: all mgr daemons do not support module 'dashboard', pass --force to force enablement

那是因为没有安装ceph-mgr-dashboard,在mgr节点上安装即可

[ceph-admin@ceph-node1 ~]$ sudo yum -y install ceph-mgr-dashboard

默认情况下,仪表板的所有HTTP连接均使用SSL/TLS进行保护。
要快速启动并运行仪表板,可以使用以下命令生成并安装自签名证书

[ceph-admin@ceph-node1 ~]$ sudo ceph dashboard create-self-signed-cert
Self-signed certificate created

创建具有管理员角色的用户:

[ceph-admin@ceph-node1 ~]$ sudo ceph dashboard set-login-credentials admin admin
******************************************************************
***          WARNING: this command is deprecated.              ***
*** Please use the ac-user-* related commands to manage users. ***
******************************************************************
Username and password updated

查看ceph-mgr服务:

[ceph-admin@ceph-node1 ~]$ sudo ceph mgr services
{
     
    "dashboard": "https://ceph-node1:8443/"
}

浏览器访问测试:
http://192.168.56.125:8443
Ceph分布式存储系列(二):ceph-deploy方式部署三节点ceph集群_第1张图片

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