master节点故障切换到standby master上
下面模拟Master节点故障，切换到Standby的情况。直接关闭Master节点主机的电源，模拟Master节点故障。可以通过gpactivatestandby命令将Standby切换成Master，这个命令依赖几个环境变量，下面的测试会一一介绍。
1. 需要设置master和standby的环境变量
SDW [root@mdw ~]# su - gpadmin Last login: Mon Apr 20 23:29:40 CST 2020 on pts/0 [gpadmin@mdw ~]$ gpstate -f 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:-Starting gpstate with args: -f 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:-Standby master details 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:----------------------- 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:- Standby address = smdw 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:- Standby data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:- Standby port = 5432 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:- Standby PID = 31874 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:- Standby status = Standby host passive 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:--pg_stat_replication 20200421:00:01:47:019456 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:01:48:019456 gpstate:mdw:gpadmin-[INFO]:--WAL Sender State: streaming 20200421:00:01:48:019456 gpstate:mdw:gpadmin-[INFO]:--Sync state: sync 20200421:00:01:48:019456 gpstate:mdw:gpadmin-[INFO]:--Sent Location: 0/CB222C8 20200421:00:01:48:019456 gpstate:mdw:gpadmin-[INFO]:--Flush Location: 0/CB222C8 20200421:00:01:48:019456 gpstate:mdw:gpadmin-[INFO]:--Replay Location: 0/CB222C8 20200421:00:01:48:019456 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- [gpadmin@mdw ~]$ cat .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/.local/bin:$HOME/bin export PATH export MASTER_DATA_DIRECTORY=/greenplum/gpdata/master/gpseg-1 source /usr/local/greenplum-db/greenplum_path.sh export PGPORT=5432 export PGDATABASE=archdata [gpadmin@mdw ~]$ [gpadmin@mdw ~]$ ls gpAdminLogs gpconfig [gpadmin@mdw ~]$ [gpadmin@sdw3 ~]$ cat .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/.local/bin:$HOME/bin export PATH export MASTER_DATA_DIRECTORY=/greenplum/gpdata/master/gpseg-1 source /usr/local/greenplum-db/greenplum_path.sh export PGPORT=5432 export PGDATABASE=archdata [gpadmin@sdw3 ~]$ 2 模拟master故障
[root@mdw ~]# su - gpadmin Last login: Tue Apr 21 00:01:42 CST 2020 on pts/0 [gpadmin@mdw ~]$ pg_ctl stop -D $MASTER_DATA_DIRECTORY waiting for server to shut down.... done server stopped [gpadmin@mdw ~]$ gpstate -f 20200421:00:12:11:020067 gpstate:mdw:gpadmin-[INFO]:-Starting gpstate with args: -f 20200421:00:12:11:020067 gpstate:mdw:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:12:11:020067 gpstate:mdw:gpadmin-[CRITICAL]:-gpstate failed. (Reason='could not connect to server: Connection refused Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432? ') exiting... [gpadmin@mdw ~]$ 3 standby 切换到master
[root@sdw3 ~]# su - gpadmin Last login: Tue Apr 21 00:05:11 CST 2020 on pts/1 [gpadmin@sdw3 ~]$ gpactivatestandby -d $MASTER_DATA_DIRECTORY 20200421:00:13:16:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:13:16:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Standby data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:13:16:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Standby port = 5432 20200421:00:13:16:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Standby running = yes 20200421:00:13:16:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Force standby activation = no 20200421:00:13:16:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ Do you want to continue with standby master activation? Yy|Nn (default=N): > y 20200421:00:13:27:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-found standby postmaster process 20200421:00:13:27:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Updating transaction files filespace flat files... 20200421:00:13:27:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Updating temporary files filespace flat files... 20200421:00:13:27:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Promoting standby... 20200421:00:13:27:019917 gpactivatestandby:sdw3:gpadmin-[DEBUG]:-Waiting for connection... 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Standby master is promoted 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Reading current configuration... 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[DEBUG]:-Connecting to dbname='archdata' 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Writing the gp_dbid file - /greenplum/gpdata/master/gpseg-1/gp_dbid... 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-But found an already existing file. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Hence removed that existing file. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Creating a new file... 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Wrote dbid: 1 to the file. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Now marking it as read only... 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Verifying the file... 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-The activation of the standby master has completed successfully. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-sdw3 is now the new primary master. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-You will need to update your user access mechanism to reflect 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-the change of master hostname. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Do not re-start the failed master while the fail-over master is 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-operational, this could result in database corruption! 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-MASTER_DATA_DIRECTORY is now /greenplum/gpdata/master/gpseg-1 if 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-this has changed as a result of the standby master activation, remember 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-to change this in any startup scripts etc, that may be configured 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-to set this value. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-MASTER_PORT is now 5432, if this has changed, you 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-may need to make additional configuration changes to allow access 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-to the Greenplum instance. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Refer to the Administrator Guide for instructions on how to re-activate 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-the master to its previous state once it becomes available. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-Query planner statistics must be updated on all databases 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-following standby master activation. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:-When convenient, run ANALYZE against all user databases. 20200421:00:13:28:019917 gpactivatestandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ [gpadmin@sdw3 ~]$ 4 检查状态
显示standby没有配置，此时Standby已经切换成Master，原因的Master节点已经被踢出了集群，切换后的数据库显示的是No master standby configured状态，通过gpstate –f参数也可以看到新的集群已经没有了Standby，Standby状态变成了Standby master instance not configured状态。
gpstate -f 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-Starting gpstate with args: -f 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-Standby master instance not configured 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:--pg_stat_replication 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-No entries found. 20200421:00:14:14:020036 gpstate:sdw3:gpadmin-[INFO]:-------------------------------------------------------------- [gpadmin@sdw3 ~]$ gpstate -f 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-Starting gpstate with args: -f 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-Standby master instance not configured 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:--pg_stat_replication 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-No entries found. 20200421:00:15:51:020128 gpstate:sdw3:gpadmin-[INFO]:-------------------------------------------------------------- [gpadmin@sdw3 ~]$ [gpadmin@sdw3 ~]$ gpstate -b 20200421:00:17:36:020251 gpstate:sdw3:gpadmin-[INFO]:-Starting gpstate with args: -b 20200421:00:17:36:020251 gpstate:sdw3:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:17:36:020251 gpstate:sdw3:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:17:36:020251 gpstate:sdw3:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:17:36:020251 gpstate:sdw3:gpadmin-[INFO]:-Gathering data from segments... . 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:-Greenplum instance status summary 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Master instance = Active 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Master standby = No master standby configured 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total segment instance count from metadata = 12 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Primary Segment Status 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total primary segments = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total primary segment valid (at master) = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total primary segment failures (at master) = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid files missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid files found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid PIDs missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid PIDs found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of /tmp lock files missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of /tmp lock files found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number postmaster processes missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number postmaster processes found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Mirror Segment Status 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total mirror segments = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total mirror segment valid (at master) = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total mirror segment failures (at master) = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid files missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid files found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid PIDs missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of postmaster.pid PIDs found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of /tmp lock files missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number of /tmp lock files found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number postmaster processes missing = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number postmaster processes found = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number mirror segments acting as primary segments = 0 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:- Total number mirror segments acting as mirror segments = 6 20200421:00:17:37:020251 gpstate:sdw3:gpadmin-[INFO]:----------------------------------------------------- [gpadmin@sdw3 ~]$ 5 显示整个集群的元数据信息
archdata=# \d List of relations Schema | Name | Type | Owner | Storage --------+------+-------+---------+--------- public | test | table | gpadmin | heap (1 row) archdata=# select * from gp_segment_configuration; dbid | content | role | preferred_role | mode | status | port | hostname | address | replication_port ------+---------+------+----------------+------+--------+-------+----------+---------+------------------ 2 | 0 | p | p | s | u | 40000 | sdw1 | sdw1 | 41000 4 | 2 | p | p | s | u | 40000 | sdw2 | sdw2 | 41000 6 | 4 | p | p | s | u | 40000 | sdw3 | sdw3 | 41000 3 | 1 | p | p | s | u | 40001 | sdw1 | sdw1 | 41001 5 | 3 | p | p | s | u | 40001 | sdw2 | sdw2 | 41001 7 | 5 | p | p | s | u | 40001 | sdw3 | sdw3 | 41001 8 | 0 | m | m | s | u | 50000 | sdw2 | sdw2 | 51000 9 | 1 | m | m | s | u | 50001 | sdw2 | sdw2 | 51001 10 | 2 | m | m | s | u | 50000 | sdw3 | sdw3 | 51000 11 | 3 | m | m | s | u | 50001 | sdw3 | sdw3 | 51001 12 | 4 | m | m | s | u | 50000 | sdw1 | sdw1 | 51000 13 | 5 | m | m | s | u | 50001 | sdw1 | sdw1 | 51001 1 | -1 | p | p | s | u | 5432 | smdw | smdw | (13 rows) 6 将原有的master重新生成standby master
注意这里添加的时候，会check master的数据库目录，要把原master节点的的目录删除或者重命名 [gpadmin@mdw master]$ mv /greenplum/gpdata/master/gpseg-1 /greenplum/gpdata/master/gpseg-1bak [gpadmin@mdw master]$ 将原有主节点先添加为standby 节点 （standby节点，gpadmin账户操作） gpinitstandby -s mdw [gpadmin@sdw3 ~]$ gpinitstandby -s mdw 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Validating environment and parameters for standby initialization... 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Checking for filespace directory /greenplum/gpdata/master/gpseg-1 on mdw 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum standby master initialization parameters 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum master hostname = smdw 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum master data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum master port = 5432 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum standby master hostname = mdw 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum standby master port = 5432 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum standby master data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Greenplum update system catalog = On 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:- Filespace locations 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:30:15:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-pg_system -> /greenplum/gpdata/master/gpseg-1 Do you want to continue with standby master initialization? Yy|Nn (default=N): > y 20200421:00:30:17:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Syncing Greenplum Database extensions to standby 20200421:00:30:17:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-The packages on mdw are consistent. 20200421:00:30:18:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Adding standby master to catalog... 20200421:00:30:18:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Database catalog updated successfully. 20200421:00:30:18:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Updating pg_hba.conf file... 20200421:00:30:19:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-pg_hba.conf files updated successfully. 20200421:00:30:20:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Updating filespace flat files... 20200421:00:30:20:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Filespace flat file updated successfully. 20200421:00:30:20:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Starting standby master 20200421:00:30:20:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Checking if standby master is running on host: mdw in directory: /greenplum/gpdata/master/gpseg-1 20200421:00:30:21:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Cleaning up pg_hba.conf backup files... 20200421:00:30:22:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Backup files of pg_hba.conf cleaned up successfully. 20200421:00:30:22:021050 gpinitstandby:sdw3:gpadmin-[INFO]:-Successfully created standby master on mdw至此，现在的情况是原有的master和standby已经进行了完整的对换，
7 进行standby和master恢复原状
操作方法按照主备切换方法反向操作即可；
将smdw上master进行模拟故障
smdw上操作： [gpadmin@sdw3 ~]$ pg_ctl stop -D $MASTER_DATA_DIRECTORY waiting for server to shut down.... done server stopped [gpadmin@sdw3 ~]$
检查状态
standby 切换 master（ mdw操作）
gpactivatestandby -d $MASTER_DATA_DIRECTORY [gpadmin@mdw ~]$ gpactivatestandby -d $MASTER_DATA_DIRECTORY 20200421:00:37:43:021254 gpactivatestandby:mdw:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:37:43:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Standby data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:37:43:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Standby port = 5432 20200421:00:37:43:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Standby running = yes 20200421:00:37:43:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Force standby activation = no 20200421:00:37:43:021254 gpactivatestandby:mdw:gpadmin-[INFO]:------------------------------------------------------ Do you want to continue with standby master activation? Yy|Nn (default=N): > y 20200421:00:37:45:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-found standby postmaster process 20200421:00:37:45:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Updating transaction files filespace flat files... 20200421:00:37:45:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Updating temporary files filespace flat files... 20200421:00:37:45:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Promoting standby... 20200421:00:37:45:021254 gpactivatestandby:mdw:gpadmin-[DEBUG]:-Waiting for connection... 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Standby master is promoted 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Reading current configuration... 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[DEBUG]:-Connecting to dbname='archdata' 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Writing the gp_dbid file - /greenplum/gpdata/master/gpseg-1/gp_dbid... 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-But found an already existing file. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Hence removed that existing file. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Creating a new file... 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Wrote dbid: 1 to the file. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Now marking it as read only... 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Verifying the file... 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-The activation of the standby master has completed successfully. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-mdw is now the new primary master. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-You will need to update your user access mechanism to reflect 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-the change of master hostname. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Do not re-start the failed master while the fail-over master is 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-operational, this could result in database corruption! 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-MASTER_DATA_DIRECTORY is now /greenplum/gpdata/master/gpseg-1 if 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-this has changed as a result of the standby master activation, remember 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-to change this in any startup scripts etc, that may be configured 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-to set this value. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-MASTER_PORT is now 5432, if this has changed, you 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-may need to make additional configuration changes to allow access 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-to the Greenplum instance. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Refer to the Administrator Guide for instructions on how to re-activate 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-the master to its previous state once it becomes available. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-Query planner statistics must be updated on all databases 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-following standby master activation. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:-When convenient, run ANALYZE against all user databases. 20200421:00:37:46:021254 gpactivatestandby:mdw:gpadmin-[INFO]:------------------------------------------------------
再次检查状态
[gpadmin@mdw ~]$ gpstate -f 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-Starting gpstate with args: -f 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-Standby master instance not configured 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:--pg_stat_replication 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-No entries found. 20200421:00:38:35:021364 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- [gpadmin@mdw ~]$ gpstate -d Usage: gpstate [--help] [options] gpstate: error: -d option requires an argument [gpadmin@mdw ~]$ gpstate -b 20200421:00:38:41:021409 gpstate:mdw:gpadmin-[INFO]:-Starting gpstate with args: -b 20200421:00:38:41:021409 gpstate:mdw:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:38:41:021409 gpstate:mdw:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:38:41:021409 gpstate:mdw:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:38:41:021409 gpstate:mdw:gpadmin-[INFO]:-Gathering data from segments... . 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:-Greenplum instance status summary 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Master instance = Active 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Master standby = No master standby configured 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total segment instance count from metadata = 12 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Primary Segment Status 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total primary segments = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total primary segment valid (at master) = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total primary segment failures (at master) = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Mirror Segment Status 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total mirror segments = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total mirror segment valid (at master) = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total mirror segment failures (at master) = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes missing = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes found = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number mirror segments acting as primary segments = 0 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:- Total number mirror segments acting as mirror segments = 6 20200421:00:38:42:021409 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- [gpadmin@mdw ~]$
将smdw上master重新生成standby
smdw操作 mv /greenplum/gpdata/master/gpseg-1 /greenplum/gpdata/master/gpseg-1bak 将原有主节点先添加为standby 节点 （mdw，gpadmin账户操作） gpinitstandby -s smdw [gpadmin@mdw ~]$ gpinitstandby -s smdw 20200421:00:40:23:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Validating environment and parameters for standby initialization... 20200421:00:40:23:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Checking for filespace directory /greenplum/gpdata/master/gpseg-1 on smdw 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum standby master initialization parameters 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum master hostname = mdw 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum master data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum master port = 5432 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum standby master hostname = smdw 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum standby master port = 5432 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum standby master data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Greenplum update system catalog = On 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:- Filespace locations 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:------------------------------------------------------ 20200421:00:40:24:021547 gpinitstandby:mdw:gpadmin-[INFO]:-pg_system -> /greenplum/gpdata/master/gpseg-1 Do you want to continue with standby master initialization? Yy|Nn (default=N): > y 20200421:00:40:27:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Syncing Greenplum Database extensions to standby 20200421:00:40:27:021547 gpinitstandby:mdw:gpadmin-[INFO]:-The packages on smdw are consistent. 20200421:00:40:27:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Adding standby master to catalog... 20200421:00:40:27:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Database catalog updated successfully. 20200421:00:40:27:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Updating pg_hba.conf file... 20200421:00:40:28:021547 gpinitstandby:mdw:gpadmin-[INFO]:-pg_hba.conf files updated successfully. 20200421:00:40:30:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Updating filespace flat files... 20200421:00:40:30:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Filespace flat file updated successfully. 20200421:00:40:30:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Starting standby master 20200421:00:40:30:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Checking if standby master is running on host: smdw in directory: /greenplum/gpdata/master/gpseg-1 20200421:00:40:31:021547 gpinitstandby:mdw:gpadmin-[WARNING]:-Unable to cleanup previously started standby: 'Warning: the ECDSA host key for 'smdw' differs from the key for the IP address '10.102.254.26' Offending key for IP in /home/gpadmin/.ssh/known_hosts:1 Matching host key in /home/gpadmin/.ssh/known_hosts:9 ' 20200421:00:40:32:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Cleaning up pg_hba.conf backup files... 20200421:00:40:33:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Backup files of pg_hba.conf cleaned up successfully. 20200421:00:40:33:021547 gpinitstandby:mdw:gpadmin-[INFO]:-Successfully created standby master on smdw8 确认状态恢复完成
[gpadmin@mdw ~]$ gpstate -b 20200421:00:40:49:021656 gpstate:mdw:gpadmin-[INFO]:-Starting gpstate with args: -b 20200421:00:40:49:021656 gpstate:mdw:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:40:49:021656 gpstate:mdw:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:40:49:021656 gpstate:mdw:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:40:49:021656 gpstate:mdw:gpadmin-[INFO]:-Gathering data from segments... . 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:-Greenplum instance status summary 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Master instance = Active 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Master standby = smdw 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Standby master state = Standby host passive 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total segment instance count from metadata = 12 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Primary Segment Status 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total primary segments = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total primary segment valid (at master) = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total primary segment failures (at master) = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Mirror Segment Status 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total mirror segments = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total mirror segment valid (at master) = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total mirror segment failures (at master) = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid files found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of postmaster.pid PIDs found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number of /tmp lock files found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes missing = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number postmaster processes found = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number mirror segments acting as primary segments = 0 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:- Total number mirror segments acting as mirror segments = 6 20200421:00:40:50:021656 gpstate:mdw:gpadmin-[INFO]:----------------------------------------------------- [gpadmin@mdw ~]$ gpstate -f 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-Starting gpstate with args: -f 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-local Greenplum Version: 'postgres (Greenplum Database) 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4' 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-master Greenplum Version: 'PostgreSQL 8.3.23 (Greenplum Database 5.10.2 build commit:b3c02f3acd880e2d676dacea36be015e4a3826d4) on x86_64-pc-linux-gnu, compiled by GCC gcc (GCC) 6.2.0, 64-bit compiled on Aug 10 2018 07:30:24' 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-Obtaining Segment details from master... 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-Standby master details 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:----------------------- 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:- Standby address = smdw 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:- Standby data directory = /greenplum/gpdata/master/gpseg-1 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:- Standby port = 5432 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:- Standby PID = 21942 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:- Standby status = Standby host passive 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:--pg_stat_replication 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:--WAL Sender State: streaming 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:--Sync state: sync 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:--Sent Location: 0/1C000000 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:--Flush Location: 0/1C000000 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:--Replay Location: 0/1C000000 20200421:00:40:56:021742 gpstate:mdw:gpadmin-[INFO]:-------------------------------------------------------------- [gpadmin@mdw ~]$ archdata=# select * from gp_segment_configuration; dbid | content | role | preferred_role | mode | status | port | hostname | address | replication_port ------+---------+------+----------------+------+--------+-------+----------+---------+------------------ 2 | 0 | p | p | s | u | 40000 | sdw1 | sdw1 | 41000 4 | 2 | p | p | s | u | 40000 | sdw2 | sdw2 | 41000 6 | 4 | p | p | s | u | 40000 | sdw3 | sdw3 | 41000 3 | 1 | p | p | s | u | 40001 | sdw1 | sdw1 | 41001 5 | 3 | p | p | s | u | 40001 | sdw2 | sdw2 | 41001 7 | 5 | p | p | s | u | 40001 | sdw3 | sdw3 | 41001 8 | 0 | m | m | s | u | 50000 | sdw2 | sdw2 | 51000 9 | 1 | m | m | s | u | 50001 | sdw2 | sdw2 | 51001 10 | 2 | m | m | s | u | 50000 | sdw3 | sdw3 | 51000 11 | 3 | m | m | s | u | 50001 | sdw3 | sdw3 | 51001 12 | 4 | m | m | s | u | 50000 | sdw1 | sdw1 | 51000 13 | 5 | m | m | s | u | 50001 | sdw1 | sdw1 | 51001 1 | -1 | p | p | s | u | 5432 | mdw | mdw | 14 | -1 | m | m | s | u | 5432 | smdw | smdw | (14 rows) archdata=#
