Greenplum 添加mirror步骤
2024-08-23 00:02:04
原文链接:https://yq.aliyun.com/articles/695864
[TOC]
概述
新安装的greenplum集群只有primary节点,没有mirror。高可用性没得到保证。所以就需要为集群添加mirror节点
注意:数据量过大时添加mirror,会有较大的磁盘压力,因为后台会一直同步数据,这一点线上系统需要注意
添加前情况
初始化的时候只有primary
gpstate -b
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-Greenplum Primary Segment Configuration
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:----------------------------------------
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw1 /data/primary/gpseg0 40000 2 0
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw1 /data/primary/gpseg1 40001 3 1
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw1 /data/primary/gpseg2 40002 4 2
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw1 /data/primary/gpseg3 40003 5 3
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw2 /data/primary/gpseg4 40000 6 4
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw2 /data/primary/gpseg5 40001 7 5
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw2 /data/primary/gpseg6 40002 8 6
- 20190326:00:48:33:005423 gpinitsystem:gw_mdw1:gpadmin-[INFO]:-gw_sdw2 /data/primary/gpseg7 40003 9 7
- Continue with Greenplum creation Yy/Nn>
查看系统配置表,发现只有primary节点
- postgres=# SELECT * from gp_segment_configuration ;
- dbid | content | role | preferred_role | mode | status | port | hostname | address | replication_port | san_mounts
- ------+---------+------+----------------+------+--------+-------+----------+---------+------------------+------------
- 1 | -1 | p | p | s | u | 5432 | gw_mdw1 | gw_mdw1 | |
- 2 | 0 | p | p | s | u | 40000 | gw_sdw1 | gw_sdw1 | |
- 6 | 4 | p | p | s | u | 40000 | gw_sdw2 | gw_sdw2 | |
- 3 | 1 | p | p | s | u | 40001 | gw_sdw1 | gw_sdw1 | |
- 7 | 5 | p | p | s | u | 40001 | gw_sdw2 | gw_sdw2 | |
- 4 | 2 | p | p | s | u | 40002 | gw_sdw1 | gw_sdw1 | |
- 8 | 6 | p | p | s | u | 40002 | gw_sdw2 | gw_sdw2 | |
- 5 | 3 | p | p | s | u | 40003 | gw_sdw1 | gw_sdw1 | |
- 9 | 7 | p | p | s | u | 40003 | gw_sdw2 | gw_sdw2 | |
- (9 rows)
添加步骤
在所有需要添加mirror的主机,创建存放mirror的数据目录
可以使用gpssh命令
gpssh -f seg_hosts -e 'mkdir -p /data/mirror'
生成addmirror文件
执行gpaddmirrors 命令,键入存放mirror节点的日志,生成配置文件
- [gpadmin@gw_mdw1 ~]$ gpaddmirrors -o ./addmirror
- 20190326:00:56:21:030831 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-Starting gpaddmirrors with args: -o ./addmirror
- 20190326:00:56:21:030831 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 4.3.1.0 build 6'
- 20190326:00:56:21:030831 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.2.15 (Greenplum Database 4.3.1.0 build 6) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Jun 11 2014 17:23:40'
- 20190326:00:56:21:030831 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-Obtaining Segment details from master...
- Enter mirror segment data directory location 1 of 4 >
- /data/mirror
- Enter mirror segment data directory location 2 of 4 >
- /data/mirror
- Enter mirror segment data directory location 3 of 4 >
- /data/mirror
- Enter mirror segment data directory location 4 of 4 >
- /data/mirror
- 20190326:00:57:15:030831 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-Configuration file output to ./addmirror successfully.
查看文件内容如下
- [gpadmin@gw_mdw1 ~]$ cat addmirror
- filespaceOrder=
- mirror0=0:gw_sdw2:41000:42000:43000:/data/mirror/gpseg0
- mirror1=1:gw_sdw2:41001:42001:43001:/data/mirror/gpseg1
- mirror2=2:gw_sdw2:41002:42002:43002:/data/mirror/gpseg2
- mirror3=3:gw_sdw2:41003:42003:43003:/data/mirror/gpseg3
- mirror4=4:gw_sdw1:41000:42000:43000:/data/mirror/gpseg4
- mirror5=5:gw_sdw1:41001:42001:43001:/data/mirror/gpseg5
- mirror6=6:gw_sdw1:41002:42002:43002:/data/mirror/gpseg6
- mirror7=7:gw_sdw1:41003:42003:43003:/data/mirror/gpseg7
执行添加命令
- [gpadmin@gw_mdw1 ~]$ gpaddmirrors -i addmirror
- 20190326:01:08:45:031106 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-Starting gpaddmirrors with args: -i addmirror
- 20190326:01:08:45:031106 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 4.3.1.0 build 6'
- 20190326:01:08:45:031106 gpaddmirrors:gw_mdw1:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.2.15 (Greenplum Database 4.3.1.0 build 6) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Jun 11 2014 17:23:40'
命令没有报错,查看mirror节点的情况
使用gpstate -m查看,发现所有的mirror正在同步数据,因为我的集群新建,很快就同步完成了,此时再执行gpstate -m就可以看到Data Status的状态是Synchronized(已同步的)
- [gpadmin@gw_mdw1 ~]$ gpstate -m
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:-Starting gpstate with args: -m
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 4.3.1.0 build 6'
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.2.15 (Greenplum Database 4.3.1.0 build 6) on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC) 4.4.2 compiled on Jun 11 2014 17:23:40'
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:-Obtaining Segment details from master...
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:--------------------------------------------------------------
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:--Current GPDB mirror list and status
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:--Type = Group
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:--------------------------------------------------------------
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- Mirror Datadir Port Status Data Status
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw2 /data/mirror/gpseg0 41000 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw2 /data/mirror/gpseg1 41001 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw2 /data/mirror/gpseg2 41002 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw2 /data/mirror/gpseg3 41003 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw1 /data/mirror/gpseg4 41000 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw1 /data/mirror/gpseg5 41001 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw1 /data/mirror/gpseg6 41002 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:- gw_sdw1 /data/mirror/gpseg7 41003 Passive Resynchronizing
- 20190326:01:09:51:031359 gpstate:gw_mdw1:gpadmin-[INFO]:--------------------------------------------------------------
查看节点状态
发现所有的mirror已经启动
- postgres=# SELECT * from gp_segment_configuration ;
- dbid | content | role | preferred_role | mode | status | port | hostname | address | replication_port | san_mounts
- ------+---------+------+----------------+------+--------+-------+----------+---------+------------------+------------
- 1 | -1 | p | p | s | u | 5432 | gw_mdw1 | gw_mdw1 | |
- 2 | 0 | p | p | s | u | 40000 | gw_sdw1 | gw_sdw1 | 43000 |
- 10 | 0 | m | m | s | u | 41000 | gw_sdw2 | gw_sdw2 | 42000 |
- 3 | 1 | p | p | s | u | 40001 | gw_sdw1 | gw_sdw1 | 43001 |
- 11 | 1 | m | m | s | u | 41001 | gw_sdw2 | gw_sdw2 | 42001 |
- 4 | 2 | p | p | s | u | 40002 | gw_sdw1 | gw_sdw1 | 43002 |
- 12 | 2 | m | m | s | u | 41002 | gw_sdw2 | gw_sdw2 | 42002 |
- 5 | 3 | p | p | s | u | 40003 | gw_sdw1 | gw_sdw1 | 43003 |
- 13 | 3 | m | m | s | u | 41003 | gw_sdw2 | gw_sdw2 | 42003 |
- 6 | 4 | p | p | s | u | 40000 | gw_sdw2 | gw_sdw2 | 43000 |
- 14 | 4 | m | m | s | u | 41000 | gw_sdw1 | gw_sdw1 | 42000 |
- 7 | 5 | p | p | s | u | 40001 | gw_sdw2 | gw_sdw2 | 43001 |
- 15 | 5 | m | m | s | u | 41001 | gw_sdw1 | gw_sdw1 | 42001 |
- 8 | 6 | p | p | s | u | 40002 | gw_sdw2 | gw_sdw2 | 43002 |
- 16 | 6 | m | m | s | u | 41002 | gw_sdw1 | gw_sdw1 | 42002 |
- 9 | 7 | p | p | s | u | 40003 | gw_sdw2 | gw_sdw2 | 43003 |
- 17 | 7 | m | m | s | u | 41003 | gw_sdw1 | gw_sdw1 | 42003 |
- (17 rows)
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