GBase 8a的V95版本，支持通过空闲节点(freenode)做快速的故障节点替换(省去了找安装包，检查安装配置过程)，但freenode只针对开启了VC的场景，对于单VC,也就是兼容V8版本的模式，是不支持freenode的，也就不支持这种节点替换方式。解决方法就是用全新节点的方案。
目录导航
报错信息
版本：9.5.3.22
install prefix: /opt/gbase/10.0.2.103
execute replace node os user: gbase
replaced nodes: ['10.0.2.104']
freenode: ['10.0.2.106']
Error: replace.py(line 1147) -- single vc mode does not support '--freenode'
[gbase@gbase_rh7_003 gcinstall]$
原因
集群是单VC模式，兼容V8的，不支持freenode。查看gcadmin输出底部，确实没有freenode信息。
[gbase@gbase_rh7_003 gcinstall]$ gcadmin
CLUSTER STATE: ACTIVE
VIRTUAL CLUSTER MODE: NORMAL
====================================
| GBASE GCWARE CLUSTER INFORMATION |
====================================
| NodeName | IpAddress | gcware |
------------------------------------
| gcware1 | 10.0.2.103 | OPEN |
------------------------------------
====================================================
| GBASE COORDINATOR CLUSTER INFORMATION |
====================================================
| NodeName | IpAddress | gcluster | DataState |
----------------------------------------------------
| coordinator1 | 10.0.2.103 | OPEN | 0 |
----------------------------------------------------
=========================================================================================================
| GBASE DATA CLUSTER INFORMATION |
=========================================================================================================
| NodeName | IpAddress | DistributionId | gnode | syncserver | DataState |
---------------------------------------------------------------------------------------------------------
| node1 | 10.0.2.103 | 1 | OPEN | OPEN | 0 |
---------------------------------------------------------------------------------------------------------
| node2 | 10.0.2.104 | 1 | OPEN | OPEN | 0 |
---------------------------------------------------------------------------------------------------------
| node3 | 10.0.2.105 | 1 | OPEN | OPEN | 0 |
---------------------------------------------------------------------------------------------------------
| node4 | 10.0.2.106 | | OPEN | OPEN | 0 |
---------------------------------------------------------------------------------------------------------
[gbase@gbase_rh7_003 gcinstall]$ 解决方案
采用全新机器的方案，在原有IP上做节点替换。 请参考 GBase 8a V95版本节点替换操作手顺