一、添加datanode slave节点
[pgxl@mdw pgxc_ctl]$ pgxc_ctl
/bin/bash
Installing pgxc_ctl_bash script as /home/pgxl/pgxc_ctl/pgxc_ctl_bash.
Installing pgxc_ctl_bash script as /home/pgxl/pgxc_ctl/pgxc_ctl_bash.
Reading configuration using /home/pgxl/pgxc_ctl/pgxc_ctl_bash --home /home/pgxl/pgxc_ctl --configuration /home/pgxl/pgxc_ctl/pgxc_ctl.conf
Finished reading configuration.
******** PGXC_CTL START ***************
Current directory: /home/pgxl/pgxc_ctl
PGXC
PGXC
PGXC add datanode slave dn1 mdw 6432 40001 /usr/local/pgxl-9.5/data/dn_slave.1 none /usr/local/pgxl-9.5/data/datanode_archlog.1 //指定dn1 slave执备节点。
Actual Command: ssh pgxl@mdw "( mkdir -p /usr/local/pgxl-9.5/data/dn_slave.1;chmod 0700 /usr/local/pgxl-9.5/data/dn_slave.1 ) > /tmp/mdw_STDOUT_16768_9 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@mdw:/tmp/mdw_STDOUT_16768_9 /tmp/STDOUT_16768_10 > /dev/null 2>&1
Actual Command: ssh pgxl@mdw "( rm -rf /usr/local/pgxl-9.5/data/datanode_archlog.1; mkdir -p /usr/local/pgxl-9.5/data/datanode_archlog.1;chmod 0700 /usr/local/pgxl-9.5/data/datanode_archlog.1 ) > /tmp/mdw_STDOUT_16768_11 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@mdw:/tmp/mdw_STDOUT_16768_11 /tmp/STDOUT_16768_12 > /dev/null 2>&1
Actual Command: ssh pgxl@mdw "( rm -rf none; mkdir -p none;chmod 0700 none ) > /tmp/mdw_STDOUT_16768_13 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@mdw:/tmp/mdw_STDOUT_16768_13 /tmp/STDOUT_16768_14 > /dev/null 2>&1
Actual Command: ssh pgxl@sdw02 "( pg_ctl stop -w -Z datanode -D /usr/local/pgxl-9.5/data/dn_master -m fast ) > /tmp/mdw_STDOUT_16768_15 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@sdw02:/tmp/mdw_STDOUT_16768_15 /tmp/STDOUT_16768_16 > /dev/null 2>&1
Actual Command: ssh pgxl@sdw02 "( pg_ctl start -w -Z datanode -D /usr/local/pgxl-9.5/data/dn_master ) > /tmp/mdw_STDOUT_16768_17 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@sdw02:/tmp/mdw_STDOUT_16768_17 /tmp/STDOUT_16768_18 > /dev/null 2>&1
LOG: redirecting log output to logging collector process
HINT: Future log output will appear in directory "pg_log".
Actual Command: ssh pgxl@mdw "( pg_basebackup -p 5434 -h sdw02 -D /usr/local/pgxl-9.5/data/dn_slave.1 -x ) > /tmp/mdw_STDOUT_16768_19 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@mdw:/tmp/mdw_STDOUT_16768_19 /tmp/STDOUT_16768_20 > /dev/null 2>&1
Actual Command: ssh pgxl@mdw "( pg_ctl start -w -Z datanode -D /usr/local/pgxl-9.5/data/dn_slave.1 ) > /tmp/mdw_STDOUT_16768_21 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@mdw:/tmp/mdw_STDOUT_16768_21 /tmp/STDOUT_16768_22 > /dev/null 2>&1
LOG: redirecting log output to logging collector process
HINT: Future log output will appear in directory "pg_log".
PGXC monitor all
Running: gtm master
Running: coordinator master coord1
Running: coordinator master coord2
Running: datanode master dn1
Running: datanode slave dn1
Running: datanode master dn2
PGXC
test=# select * from pgxc_node; //查看pgxc节点情况
node_name | node_type | node_port | node_host | nodeis_primary | nodeis_preferred | node_id
-----------+-----------+-----------+-----------+----------------+------------------+-------------
coord1 | C | 5432 | sdw01 | f | f | 1885696643
coord2 | C | 5433 | sdw02 | f | f | -1197102633
dn1 | D | 5434 | sdw02 | f | f | -560021589
dn2 | D | 5435 | sdw03 | f | f | 352366662
(4 rows)
test=# EXECUTE DIRECT ON(dn1) 'SELECT client_hostname, state, sync_state FROM pg_stat_replication'; //查看dn1是否开同步发状态
client_hostname | state | sync_state
-----------------+-----------+------------
| streaming | sync
(1 row)
[pgxl@mdw pgxc_ctl]$ pgxc_ctl
/bin/bash
Installing pgxc_ctl_bash script as /home/pgxl/pgxc_ctl/pgxc_ctl_bash.
Installing pgxc_ctl_bash script as /home/pgxl/pgxc_ctl/pgxc_ctl_bash.
Reading configuration using /home/pgxl/pgxc_ctl/pgxc_ctl_bash --home /home/pgxl/pgxc_ctl --configuration /home/pgxl/pgxc_ctl/pgxc_ctl.conf
Finished reading configuration.
******** PGXC_CTL START ***************
Current directory: /home/pgxl/pgxc_ctl
PGXC stop -m immediate datanode master dn1 //停止dn1主节点
Stopping datanode master dn1.
Done.
PGXC failover datanode dn1 //切换dn1 slave节点为主节点
Failover specified datanodes.
Failover the datanode dn1.
Failover datanode dn1 using GTM itself
Actual Command: ssh pgxl@mdw "( pg_ctl promote -Z datanode -D /usr/local/pgxl-9.5/data/dn_slave.1 ) > /tmp/mdw_STDOUT_18097_2 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@mdw:/tmp/mdw_STDOUT_18097_2 /tmp/STDOUT_18097_3 > /dev/null 2>&1
Actual Command: ssh pgxl@mdw "( pg_ctl restart -w -Z datanode -D /usr/local/pgxl-9.5/data/dn_slave.1 -o -i; sleep 1 ) > /tmp/mdw_STDOUT_18097_4 2>&1" < /dev/null > /dev/null 2>&1
Bring remote stdout: scp pgxl@mdw:/tmp/mdw_STDOUT_18097_4 /tmp/STDOUT_18097_5 > /dev/null 2>&1
LOG: redirecting log output to logging collector process
HINT: Future log output will appear in directory "pg_log".
ALTER NODE
pgxc_pool_reload
------------------
t
(1 row)
EXECUTE DIRECT
pgxc_pool_reload
------------------
t
(1 row)
EXECUTE DIRECT
pgxc_pool_reload
------------------
t
(1 row)
ALTER NODE
pgxc_pool_reload
------------------
t
(1 row)
Done.
PGXC
test=# SELECT xc_node_id, count(*) FROM disttab GROUP BY xc_node_id; //要看查询是否正常
xc_node_id | count
------------+--------
-560021589 | 237465
352366662 | 234534
(2 rows)
test=# SELECT oid, * FROM pgxc_node; //查看dn1节点已经在原来的备节点上了
oid | node_name | node_type | node_port | node_host | nodeis_primary | nodeis_preferred | node_id
-------+-----------+-----------+-----------+-----------+----------------+------------------+-------------
11819 | coord1 | C | 5432 | sdw01 | f | f | 1885696643
16384 | coord2 | C | 5433 | sdw02 | f | f | -1197102633
16386 | dn2 | D | 5435 | sdw03 | f | f | 352366662
16385 | dn1 | D | 6432 | mdw | f | f | -560021589
(4 rows)
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