本文只是介紹Linux RHCS最基本的一些維護命令,屬於DBA應該了解的層面。
1. 查看集群狀態
``` clustat cman_tool status cman_tool nodes -a ``` 下面是這些命令查詢的顯示結果示例: ``` #1.1 clustat查看集群狀態(最常用) 在節點1查看的,狀態中的Local就在節點1上顯示。 # clustat Cluster Status for new_cluster @ Tue Sep 1 12:23:09 2015 Member Status: QuorateMember 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
<h1 id="2">2. 集群正常啟動</h1>
先啟動cman,再啟動rgmanager.
service cman start
service rgmanager start
下面是集群正常啟動過程示例:
注: 各節點先依次啟動cman再依次啟動rgmanager,注意啟動順序。
service cman start
Starting cluster:
Loading modules... done
Mounting configfs... done
Starting ccsd... done
Starting cman... done
Starting daemons... done
Starting fencing... done
[確定]
service rgmanager start
啟動 Cluster Service Manager:[確定]
<h1 id="3">3. 集群正常關閉</h1>
先關閉rgmanager,再關閉cman.
service rgmanager stop
service cman stop
下面是集群正常關閉過程示例:
注: 各節點先依次關閉rgmanager,再依次關閉cman,注意關閉順序。
service rgmanager stop
Shutting down Cluster Service Manager...
等待服務停止:[確定]
Cluster Service Manager is stopped.
service cman stop
Stopping cluster:
Stopping fencing... done
Stopping cman... done
Stopping ccsd... done
Unmounting configfs... done
[確定]
<h1 id="4">4. 查看服務是否關閉開機啟動</h1>
chkconfig --list |grep cman
chkconfig --list |grep rgmanager
下面的查看結果都是關閉的:
chkconfig --list |grep cman
cman 0:關閉 1:關閉 2:關閉 3:關閉 4:關閉 5:關閉 6:關閉
chkconfig --list |grep rgmanager
rgmanager 0:關閉 1:關閉 2:關閉 3:關閉 4:關閉 5:關閉 6:關閉