Ceph 安装

Posted 2022-03-16 luckyleaf

Ceph部署架构

三台主机，操作系统均为Centos：
- node1:192.168.122.157 ceph-deploy mon osd
- node2:192.168.122.58 mon osd
- node3:192.168.122.54 mon osd
Ceph版本 mimic

准备工作

1）关闭防火墙，关闭selinux

systemctl stop firewalld
systemctl disable firewalld    
//也可以不关闭防火墙，开放对应端口，Ceph Monitors之间默认使用 **6789** 端口通信， OSD之间默认用 **6800:7300**这个范围内的端口通信
vim /etc/selinux/config
SELINUX=disabled
然后重启 reboot

2）修改hosts

vim /etc/hosts
192.168.122.157 node1
192.168.122.58  node2
192.168.122.54  node3

3）免密登录（如下示例）

[[email protected] ~]#ssh-keygen
[[email protected] ~]#ssh-copy-id -i .ssh/id_rsa.pub node2  //首次需要输入密码

4）安装ntp服务，然后同步时间

[[email protected] ~]# yum install ntpd -y
[[email protected] ~]# systemctl start ntpd
[[email protected] ~]# systemctl enable ntpd
node2、node3节点同步node1的时间
配置计划任务 
[[email protected] ~]#crontab -e
*/5 * * * * ntpdate 192.168.122.157

开始部署

1）node1安装ceph-deploy

[[email protected] ~]# yum install ceph-deploy -y

2）添加Ceph源

[[email protected] ~]#export CEPH_DEPLOY_REPO_URL=http://mirrors.163.com/ceph/rpm-mimic/el7/   //使用国内的源速度会快一些
[[email protected] ~]#export CEPH_DEPLOY_GPG_URL=http://mirrors.163.com/ceph/keys/release.asc
[[email protected] ~]# vim /etc/yum.repos.d/ceph.repo
[ceph-noarch]
name=Ceph noarch packages
baseurl=http://mirrors.163.com/ceph/rpm-mimic/el7/noarch
enable=1
gpgcheck=1
type=rpm-md
gpgkey=https://download.ceph.com/keys/release.asc

3）创建一个集群

[[email protected] ~]# cd /opt
[[email protected] opt]# mkdir cluster && cd cluster
[[email protected] cluster]# ceph-deploy new node1 node2 node3

4）安装Ceph

[[email protected] cluster]# ceph-deploy install --release mimic node1 node2 node3

5）创建monitor、配置admin key到各个节点

[[email protected] cluster]# ceph-deploy mon create-initial  //完成后，在当前目录下会生成密钥
[[email protected] cluster]# ls
ceph.bootstrap-mds.keyring  ceph.bootstrap-rgw.keyring  ceph-deploy-ceph.log
ceph.bootstrap-mgr.keyring  ceph.client.admin.keyring   ceph.log
ceph.bootstrap-osd.keyring  ceph.conf                   ceph.mon.keyring
[[email protected] cluster]# ceph-deploy admin node1 node2 node3 //配置admin key 到各个节点

6）添加OSD

[[email protected] cluster]# ceph-deploy osd create node1 --data /dev/vdb
[[email protected] cluster]# ceph-deploy osd create node1 --data /dev/vdc
//依次添加，默认第一个分区为数据分区，第二个分区为日志分区

7）在node2、node3上添加monitor

[[email protected] cluster]# ceph-deploy mon add node2
[[email protected] cluster]# ceph-deploy mon add node3

8）添加管理进程服务

//查看集群状态
[[email protected] cluster]# ceph status
cluster:
id:     4e1947bd-23ae-4828-ba5d-0e09779ced22
health: HEALTH_WARN
        no active mgr
        clock skew detected on mon.node2, mon.node1

services:
mon: 3 daemons, quorum node3,node2,node1
mgr: no daemons active
osd: 6 osds: 6 up, 6 in

data:
pools:   0 pools, 0 pgs
objects: 0  objects, 0 B
usage:   0 B used, 0 B / 0 B avail
pgs: 
//有告警no active mgr，安装下管理进程
[[email protected] cluster]# ceph-deploy mgr create node1
//再次查看集群
[[email protected] cluster]# ceph -s
cluster:
id:     4e1947bd-23ae-4828-ba5d-0e09779ced22
health: HEALTH_OK

services:
mon: 3 daemons, quorum node3,node2,node1
mgr: node1(active)
osd: 6 osds: 6 up, 6 in

data:
pools:   0 pools, 0 pgs
objects: 0  objects, 0 B
usage:   6.0 GiB used, 54 GiB / 60 GiB avail
pgs:     

致此，ceph的部署基本完成。