本文只是介绍Linux RHCS最基本的一些维护命令,属于DBA应该了解的层面。
- 查看集群状态
- 集群正常启动
- 集群正常关闭
- 查看服务是否关闭开机启动
1. 查看集群状态
clustat
cman_tool status
cman_tool nodes -a下面是这些命令查询的显示结果示例:
#1.1 clustat查看集群状态(最常用)
在节点1查看的,状态中的Local就在节点1上显示。
# clustat
Cluster Status for new_cluster @ Tue Sep 1 12:23:09 2015
Member Status: Quorate
Member Name ID Status
------ ---- ---- ------
heartdb1 1 Online, Local, rgmanager
heartdb2 2 Online, rgmanager
Service Name Owner (Last) State
------- ---- ----- ------ -----
service:orares heartdb1 started
#1.2 cman_tool status 查看
# cman_tool status
Version: 6.2.0
Config Version: 18
Cluster Name: new_cluster
Cluster Id: 23732
Cluster Member: Yes
Cluster Generation: 432
Membership state: Cluster-Member
Nodes: 2
Expected votes: 1
Total votes: 2
Quorum: 1
Active subsystems: 8
Flags: 2node Dirty
Ports Bound: 0 177
Node name: heartdb1
Node ID: 1
Multicast addresses: 239.192.92.17
Node addresses: 192.168.1.1
#1.3 cman_tool 查看nodes信息
# cman_tool nodes -a
Node Sts Inc Joined Name
1 M 404 2015-08-03 17:52:20 heartdb1
Addresses: 192.168.1.1
2 M 432 2015-09-01 14:32:27 heartdb2
Addresses: 192.168.1.2 2. 集群正常启动
先启动cman,再启动rgmanager.
service cman start
service rgmanager start 下面是集群正常启动过程示例:
注: 各节点先依次启动cman再依次启动rgmanager,注意启动顺序。
# service cman start
Starting cluster:
Loading modules... done
Mounting configfs... done
Starting ccsd... done
Starting cman... done
Starting daemons... done
Starting fencing... done
[确定]
# service rgmanager start
启动 Cluster Service Manager:[确定]3. 集群正常关闭
先关闭rgmanager,再关闭cman.
service rgmanager stop
service cman stop下面是集群正常关闭过程示例:
注: 各节点先依次关闭rgmanager,再依次关闭cman,注意关闭顺序。
# service rgmanager stop
Shutting down Cluster Service Manager...
等待服务停止:[确定]
Cluster Service Manager is stopped.
# service cman stop
Stopping cluster:
Stopping fencing... done
Stopping cman... done
Stopping ccsd... done
Unmounting configfs... done
[确定]4. 查看服务是否关闭开机启动
chkconfig --list |grep cman
chkconfig --list |grep rgmanager下面的查看结果都是关闭的:
# chkconfig --list |grep cman
cman 0:关闭 1:关闭 2:关闭 3:关闭 4:关闭 5:关闭 6:关闭
# chkconfig --list |grep rgmanager
rgmanager 0:关闭 1:关闭 2:关闭 3:关闭 4:关闭 5:关闭 6:关闭