Oracle RAC 添加删除节点

百度搜索，会很多文章关于如何添加删除节点的，而且这个操作也没有什么很多的技术含量，但是自己测试过，记录一下，以备后续查询，同时也希望能给需要的朋友一些帮助.

环境介绍

环境为两个节点RAC：racnode1和racnode2

测试过程是删除racnode1

oracle版本为11.2.0.1

---- racnode1上操作 -----

首先，要禁用和停止监听,然后查询确认操作已经成功

[grid@racnode1 ~]$ srvctl disable listener -n racnode1

[grid@racnode1 ~]$ srvctl stop listener -n racnode1

[grid@racnode1 ~]$ crsctl status res -t

ora.LISTENER.lsnr

OFFLINE OFFLINE      racnode1

ONLINE  ONLINE       racnode2

ora.LISTENER_2.lsnr

OFFLINE OFFLINE      racnode1

ONLINE  ONLINE       racnode2

--------------------------------------------------------------------------------

进入到GI目录，去删除OCR中的该数据库的信息（这个操作可以在任何一个运行的节点上执行）

[grid@racnode1 ~]$ cd $ORACLE_HOME/oui/bin

[grid@racnode1 bin]$ pwd

/u01/app/11.2.0/grid/oui/bin

[grid@racnode1 bin]$ ./runInstaller -updateNodelist ORACLE_HOME=/u01/app/11.2.0/grid/oui/bin "CLUSTER_NODES=racnode2" <<<<<注：这里需要填写希望保留下来的节点，如果有多个节点，除了需要删除的节点，其他节点都要写上并用“，”隔开

Starting Oracle Universal Installer...

Checking swap space: must be greater than 500 MB.   Actual 2353 MB    Passed

The inventory pointer is located at /etc/oraInst.loc

The inventory is located at /u01/app/oraInventory

/u01/app/oraInventory/ContentsXML

[grid@racnode1 bin]$ olsnodes -s -t

racnode1        Active  Unpinned

racnode2        Active  Unpinned

停止并删除VIP

[root@racnode1 bin]# srvctl stop vip -i racnode1-vip

[root@racnode1 bin]# crsctl status res -t

--------------------------------------------------------------------------------

ora.LISTENER.lsnr

OFFLINE OFFLINE      racnode1

ONLINE  ONLINE       racnode2

ora.LISTENER_2.lsnr

OFFLINE OFFLINE      racnode1

ONLINE  ONLINE       racnode2

ora.racnode1.vip

1        OFFLINE OFFLINE

ora.racnode2.vip

1        ONLINE  ONLINE       racnode2

ora.scan1.vip

1        ONLINE  ONLINE       racnode1

[root@racnode1 bin]# srvctl remove vip -i racnode1-vip

Please confirm that you intend to remove the VIPs racnode1-vip (y/
) y

[root@racnode1 bin]# crsctl status res -t

--------------------------------------------------------------------------------

ora.LISTENER.lsnr

OFFLINE OFFLINE      racnode1

ONLINE  ONLINE       racnode2

ora.LISTENER_2.lsnr

OFFLINE OFFLINE      racnode1

ONLINE  ONLINE       racnode2

ora.LISTENER_SCAN1.lsnr

1        ONLINE  ONLINE       racnode1

ora.hd.db

1        ONLINE  ONLINE       racnode1                 Open

2        ONLINE  ONLINE       racnode2                 Open

ora.oc4j

1        OFFLINE OFFLINE

ora.racnode2.vip

1        ONLINE  ONLINE       racnode2

ora.scan1.vip

1        ONLINE  ONLINE       racnode1

删除节点

首先停止CRS，不然会报如下错误：

[root@racnode1 bin]# crsctl delete node -n racnode1

CRS-4658: The clusterware stack on node racnode1 is not completely down.

CRS-4000: Command Delete failed, or completed with errors.

[root@racnode1 bin]# crsctl stop crs

执行rootcrs.pl脚本

[root@racnode1 grid]# cd /u01/app/11.2.0/grid/crs/install/

[root@racnode1 install]# ./rootcrs.pl -deconfig -force

Successfully deconfigured Oracle clusterware stack on this node

如果没有执行rootcrs.pl脚本

CRS is already configured on this node for crshome=0

Cannot configure two CRS instances on the same cluster.

Please deconfigure before proceeding with the configuration of new home.

------ racnode2 上操作---------

cd /u01/app/11.2.0/grid/oui/bin

runInstaller -updateNodeList ORACLE_HOME=/u01/app/11.2.0/grid CLUSTER_NODES={racnode2} CRS=TRUE

[grid@racnode2 bin]$ crsctl status res -t

--------------------------------------------------------------------------------

NAME           TARGET  STATE        SERVER                   STATE_DETAILS

--------------------------------------------------------------------------------

Local Resources

--------------------------------------------------------------------------------

ora.DG_CRS.dg

ONLINE  ONLINE       racnode2

ora.DG_DATA.dg

ONLINE  ONLINE       racnode2

ora.DG_FRA.dg

ONLINE  ONLINE       racnode2

ora.LISTENER.lsnr

ONLINE  INTERMEDIATE racnode2

ora.LISTENER_2.lsnr

ONLINE  INTERMEDIATE racnode2

ora.asm

ONLINE  ONLINE       racnode2                 Started

ora.eons

ONLINE  ONLINE       racnode2

ora.gsd

OFFLINE OFFLINE      racnode2

ora.net1.network

ONLINE  ONLINE       racnode2

ora.ons

ONLINE  ONLINE       racnode2

ora.registry.acfs

ONLINE  ONLINE       racnode2

--------------------------------------------------------------------------------

Cluster Resources

--------------------------------------------------------------------------------

ora.LISTENER_SCAN1.lsnr

1        ONLINE  ONLINE       racnode2

ora.hd.db

1        ONLINE  OFFLINE

2        ONLINE  ONLINE       racnode2                 Open

ora.oc4j

1        OFFLINE OFFLINE

ora.racnode2.vip

1        ONLINE  ONLINE       racnode2

ora.scan1.vip

1        ONLINE  ONLINE       racnode2

增加节点到集群的方法

如果是完全空白的机器，执行以下命令会从别的节点拷贝全部的GI和DB的软件，然后完成注册OCR等操作。

./addNode.sh -silent "CLUSTER_NEW_NODES={racnode1} CLUSTER_NEW_PRIVATE_NODE_NAMES={racnode1-priv} CLUSTER_NEW_VIRTUAL_HOSTNAMES={racnode1-vip}"

如果这个节点上已经有GI和DB的软件，就不需要再copy一遍了，可以通过下面的命令直接添加节点，这样是很快的，也就是更改一下OCR，同事启动一下实例就OK了。

./addNode.sh -noCopy "CLUSTER_NEW_NODES={racnode1} CLUSTER_NEW_VIRTUAL_HOSTNAMES={racnode1-vip}"

在需要添加的节点上运行root.sh脚本，完成最后的添加

cd /u01/app/11.2.0/grid/oui/bin

runInstaller -updateNodeList ORACLE_HOME=/u01/app/11.2.0/grid CLUSTER_NODES={racnode1,racnode2} CRS=TRUE

[root@racnode1 grid]# cd /u01/app/11.2.0/grid/crs/install/

[root@racnode1 install]# ./rootcrs.pl -deconfig -force

Successfully deconfigured Oracle clusterware stack on this node

到此，删除添加都完成了，步骤不多也比较简单。
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