Linux RHCS 基础维护命令

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。

1. 查看集群状态
2. 集群正常启动
3. 集群正常关闭
4. 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

<h1 id="2">2. 集群正常启动</h1>
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]

<h1 id="3">3. 集群正常关闭</h1>
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]

<h1 id="4">4. 查看服务是否关闭开机启动</h1>

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