centos7部署ceph集群（正确）

环境介绍

主机名	系统	ip地址	ceph版本
ceph-node1	CentOS Linux release 7.2.1511	192.168.1.120	jewel
ceph-node2	CentOS Linux release 7.2.1511	192.168.1.121	jewel
ceph-node3	CentOS Linux release 7.2.1511	192.168.1.128	jewel

准备工作

◆ 1-7在三台ceph节点上都需要进行操作
◆ 8只在ceph1操作即可

1：修改主机名

[root@ceph-node1 ~]# hostname ceph-node1
[root@ceph-node1 ~]# vim /etc/sysconfig/network
HOSTNAME=ceph-node1

2：配置ip地址，子网掩码，网关

[root@ceph-node1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eno16777736
TYPE="Ethernet"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="no"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="eth1"
DEVICE="eno16777736"
ONBOOT="yes"
IPADDR="192.168.1.120"
PREFIX="24"
GATEWAY="192.168.1.1"
DNS1="192.168.0.220"

3：配置hosts文件

[root@ceph-node1 ~]# vim /etc/hosts
ceph-node1 192.168.1.120
ceph-node2 192.168.1.121
ceph-node3 192.168.1.128

4：配置防火墙

[root@ceph-node1 ~]# firewall-cmd --zone=public --add-port=6789/tcp --permanent
success
[root@ceph-node1 ~]# firewall-cmd --zone=public --add-port=6800-7100/tcp --permanent
success
[root@ceph-node1 ~]# firewall-cmd --reload
success
[root@ceph-node1 ~]# firewall-cmd --zone=public --list-all
public (default, active)
interfaces: eno16777736
sources:
services: dhcpv6-client ssh
ports: 6789/tcp 6800-7100/tcp
masquerade: no
forward-ports:
icmp-blocks:
rich rules:

5：禁用selinux

[root@ceph-node1 ~]# setenforce 0
[root@ceph-node1 ~]# sed -i "s/enforcing/permissive/g" /etc/selinux/config

6：配置时间同步

[root@ceph-node1 ~]# yum -y install ntp ntpdate
[root@ceph-node1 ~]# systemctl restart ntpd.service
[root@ceph-node1 ~]# systemctl enable ntpd.service
Created symlink from /etc/systemd/system/multi-user.target.wants/ntpd.service to /usr/lib/systemd/system/ntpd.service.
[root@ceph-node1 ~]# systemctl enable ntpdate.service
Created symlink from /etc/systemd/system/multi-user.target.wants/ntpdate.service to /usr/lib/systemd/system/ntpdate.service.

7：添加ceph jewel版本并更新yum

[root@ceph-node1 ceph]# rpm -Uvh https://download.ceph.com/rpm-jewel/el7/noarch/ceph-release-1-0.el7.noarch.rpm [root@ceph-node1 ~]# yum -y update

8：配置ceph1的免秘钥登录

[root@ceph-node1 ~]# ssh-keygen
[root@ceph-node1 ~]# ssh-copy-id root@ceph-node2
[root@ceph-node1 ~]# ssh-copy-id root@ceph-node3

在ceph-node1上创建集群

1：安装ceph-deploy

[root@ceph-node1 ~]# yum -y install ceph-deploy

2：使用ceph-deploy创建一个ceph集群

[root@ceph-node1 ~]# mkdir /etc/ceph
[root@ceph-node1 ~]# cd /etc/ceph/
[root@ceph-node1 ceph]# ceph-deploy new ceph-node1
[root@ceph-node1 ceph]# ls
ceph.conf ceph.log ceph.mon.keyring

3：使用ceph-deploy在所有节点安装ceph二进制包

[root@ceph-node1 ceph]# ceph-deploy install ceph-node1 ceph-node2 ceph-node3
[root@ceph-node1 ceph]# ceph -v
ceph version 9.2.1 (752b6a3020c3de74e07d2a8b4c5e48dab5a6b6fd)

4：在ceph-node1上创建第一个ceph monitor

[root@ceph-node1 ceph]# ceph-deploy mon create-initial

5：在ceph-node1上创建osd

[root@ceph-node1 ceph]# ceph-deploy disk list ceph-node1
[root@ceph-node1 ceph]# ceph-deploy disk zap ceph-node1:sdb ceph-node1:sdc ceph-node1:sdd
[root@ceph-node1 ~]# ceph-deploy disk zap ceph-node1:sdb ceph-node1:sdc ceph-node1:sdd
[root@ceph-node1 ~]# ceph-deploy osd create ceph-node1:sdb ceph-node1:sdc ceph-node1:sdd
[root@ceph-node1 ~]# ceph -s

扩展ceph集群

1：添加公共网络地址到配置文件

[root@ceph-node1 ~]# cd /etc/ceph/
[root@ceph-node1 ceph]# vim /etc/ceph/ceph.conf

2：在ceph-node2、ceph-node3上创建一个monitor

[root@ceph-node1 ceph]# ceph-deploy mon create ceph-node2
[root@ceph-node1 ceph]# ceph-deploy mon create ceph-node3

3：从ceph-node2、ceph-node3中添加osd

[root@ceph-node1 ceph]# ceph-deploy disk list ceph-node2 ceph-node3
[root@ceph-node1 ceph]# ceph-deploy disk zap ceph-node2:sdb ceph-node2:sdc ceph-node2:sdd
[root@ceph-node1 ceph]# ceph-deploy disk zap ceph-node3:sdb ceph-node3:sdc ceph-node3:sdd
[root@ceph-node1 ceph]# ceph-deploy osd create ceph-node2:sdb ceph-node2:sdc ceph-node2:sdd
[root@ceph-node1 ceph]# ceph-deploy osd create ceph-node3:sdb ceph-node3:sdc ceph-node3:sdd

4：调整pg和pgp的数量

[root@ceph-node1 ceph]# ceph osd pool set rbd pg_num 256
[root@ceph-node1 ceph]# ceph osd pool set rbd pgp_num 256

5：查看集群状态，此时集群应该是health状态

[root@ceph-node1 ceph]# ceph -s
cluster 266bfddf-7f45-416d-95df-4e6487e8eb20
health HEALTH_OK
monmap e3: 3 mons at {ceph-node1=192.168.1.120:6789/0,ceph-node2=192.168.1.121:6789/0,ceph-node3=192.168.1.128:6789/0}
election epoch 8, quorum 0,1,2 ceph-node1,ceph-node2,ceph-node3
osdmap e53: 9 osds: 9 up, 9 in
flags sortbitwise,require_jewel_osds
pgmap v158: 256 pgs, 1 pools, 0 bytes data, 0 objects
320 MB used, 134 GB / 134 GB avail
256 active+clean