监视器（mon）相关

文章目录

1. 1. 1.说明
   1. 1.1. 1.1 介绍
2. 2. 2. 常用操作
   1. 2.1. 2.1 查看 mon 状态
   2. 2.2. 2.2 查看 mon 的选举状态
   3. 2.3. 2.3 查看 mon 的映射信息
   4. 2.4. 2.4 删除一个 mon 节点
   5. 2.5. 2.5 添加一个 mon 节点
   6. 2.6. 2.6 获取 mon map
   7. 2.7. 2.7 注入新节点到 mon map
   8. 2.8. 2.8 查看 mon 的 admin socket
   9. 2.9. 2.9 查看 mon 的详细状态
   10. 2.10. 2.10 停止单机的 mon

1.说明

1.1 介绍

一个 Ceph 集群需要多个 Monitor 组成的小集群，它们通过 Paxos 同步数据，用来保存 OSD 的元数据。

2. 常用操作

2.1 查看 mon 状态

$ ceph mon stat
e1: 3 mons at {ceph-xx-osd00=10.69.0.1:6789/0,ceph-xx-osd01=10.69.0.2:6789/0,ceph-xx-osd02=10.69.0.3:6789/0}, election epoch 52, leader 0 ceph-xx-osd01, quorum 0,1,2 ceph-xx-osd01,ceph-xx-osd00,ceph-xx-osd02

2.2 查看 mon 的选举状态

$ ceph quorum_status
{"election_epoch":52,"quorum":[0,1,2],"quorum_names":["ceph-xx-osd01","ceph-xx-osd00","ceph-xx-osd02"],"quorum_leader_name":"ceph-xx-osd01","monmap":{"epoch":1,"fsid":"97219550-d917-4154-b745-32bac14f99f2","modified":"2017-08-31 16:14:09.434281","created":"2017-08-31 16:14:09.434281","features":{"persistent":["kraken","luminous"],"optional":[]},"mons":[{"rank":0,"name":"ceph-xx-osd01","addr":"10.69.0.2:6789/0","public_addr":"10.69.0.2:6789/0"},{"rank":1,"name":"ceph-xx-osd00","addr":"10.69.0.3:6789/0","public_addr":"10.69.0.3:6789/0"},{"rank":2,"name":"ceph-xx-osd02","addr":"10.69.0.3:6789/0","public_addr":"10.69.0.3:6789/0"}]}}

2.3 查看 mon 的映射信息

$ ceph mon dump
dumped monmap epoch 1
epoch 1
fsid 97219550-d917-4154-b745-32bac14f99f2
last_changed 2017-08-31 16:14:09.434281
created 2017-08-31 16:14:09.434281
0: 10.69.0.2:6789/0 mon.ceph-xx-osd01
1: 10.69.0.3:6789/0 mon.ceph-xx-osd00
2: 10.69.0.1:6789/0 mon.ceph-xx-osd02

2.4 删除一个 mon 节点

$ ceph mon remove ceph-xx-osd01
removing mon.ceph-xx-osd01 at 10.69.0.2:6789/0, there will be 2 monitors

$ ceph mon dump
dumped monmap epoch 2
epoch 2
fsid 97219550-d917-4154-b745-32bac14f99f2
last_changed 2017-11-23 17:06:35.075538
created 2017-08-31 16:14:09.434281
0: 10.69.0.3:6789/0 mon.ceph-xx-osd00
1: 10.69.0.1:6789/0 mon.ceph-xx-osd02

2.5 添加一个 mon 节点

$ ceph mon add  ceph-xx-osd01 10.69.0.2:6789
adding mon.ceph-xx-osd01 at 10.69.0.2:6789/0


$ ceph mon dump
dumped monmap epoch 3
epoch 3
fsid 97219550-d917-4154-b745-32bac14f99f2
last_changed 2017-11-23 17:07:39.789494
created 2017-08-31 16:14:09.434281
0: 10.69.0.2:6789/0 mon.ceph-xx-osd01
1: 10.69.0.4:6789/0 mon.ceph-xx-osd00
2: 10.69.0.3:6789/0 mon.ceph-xx-osd02

2.6 获取 mon map

$ ceph mon getmap -o 1.txt
got monmap epoch 3


$ monmaptool --print 1.txt
monmaptool: monmap file 1.txt
epoch 3
fsid 97219550-d917-4154-b745-32bac14f99f2
last_changed 2017-11-23 17:07:39.789494
created 2017-08-31 16:14:09.434281
0: 10.69.0.2:6789/0 mon.ceph-xx-osd01
1: 10.69.0.4:6789/0 mon.ceph-xx-osd00
2: 10.69.0.3:6789/0 mon.ceph-xx-osd02

2.7 注入新节点到 mon map

$ ceph mon getmap -o 1.txt
got monmap epoch 3


$ monmaptool --print 1.txt
monmaptool: monmap file 1.txt
epoch 3
fsid 97219550-d917-4154-b745-32bac14f99f2
last_changed 2017-11-23 17:07:39.789494
created 2017-08-31 16:14:09.434281
0: 10.69.0.2:6789/0 mon.ceph-xx-osd01
1: 10.69.0.4:6789/0 mon.ceph-xx-osd00
2: 10.69.0.3:6789/0 mon.ceph-xx-osd02

$ ceph-mon -i node4 -inject-monmap 1.txt

2.8 查看 mon 的 admin socket

$  ceph-conf --name mon.ceph-xx-osd00 --show-config-value admin_socket
/var/run/ceph/ceph-mon.ceph-xx-osd00.asok

2.9 查看 mon 的详细状态

$  ceph daemon mon.ceph-xx-osd00  mon_status

2.10 停止单机的 mon

#登陆对应mon的机器，停止mon进程
systemctl stop ceph-mon.target

#检查Mon的状态
ceph mon stat