案例说明：
1）修改数据库用户密码（alter user）；
2）修改.encpwd文件中用户密码；
可以通过sys_monitor.sh change_password一键同时修改数据库内部用户密码和.encpwd文件中密码。
案例测试版本：
test=# select version();
version
----------------------------------------------------------------------------------------------------------------------
KingbaseES V008R006C003B0010 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-46), 64-bit
(1 row)
集群架构：
sys_monitor.sh change_password user new_password —修改集群使用的用户的密码
描述：
sys_monitor.sh change_password user new_password判断用户是否为集群使用的用户，如果是则修改用户密码，如果不是则提示用户集群未使用该用户，请使用sql方式修改用户密码。
选项：
以下是脚本执行参数：
change_password： 脚本调用修改用户密码函数
user： 要进行修改密码的用户，只能是集群初始化时指定的用户和esrep
new_password： 用户的新密码
注意事项：
1.必须在集群所有节点状态正常的情况下才能执行修改密码操作
2.sys_monitor.sh change_password 用户名 '密码' 使用一键修改密码功能时 密码参数必须使用''括起来
3.用户必须是已经使用.encpwd免密配置文件配置了免密的用户才能进行修改密码，否则会提示集群未使用该用户，请使用sql alter user命令进行修改密码
一、查看esrep用户原密码
1）.encpwd文件
[kingbase@node1 ~]$ cat .encpwd
*:*:*:system:MTIzNDU2
*:*:*:esrep:S2luZ2Jhc2VoYTExMA==
[kingbase@node1 ~]$ echo 'S2luZ2Jhc2VoYTExMA=='|base64 -d
Kingbaseha110
2）数据库用户密码
用户密码登录测试（‘Kingbaseha110’）：
[kingbase@node3 bin]$ ./ksql -U esrep -W esrep
Password:
ksql (V8.0)
Type "help" for help.
二、一键修改esrep用户密码
[kingbase@node3 bin]$ ./sys_monitor.sh --help
Usage: ./sys_monitor.sh {start|stop|restart|stoplocal|set [--restart]|change_password user password}
[kingbase@node3 bin]$ ./sys_monitor.sh change_password esrep 'beijing'
ID | Name | Role | Status | Upstream | Location | Priority | Timeline | Connection string
----+---------+---------+-----------+----------+----------+----------+----------+---------------------------------------------------------------------------------------------------------------------------------------------------
1 | node248 | standby | running | node243 | default | 90 | 26 | host=192.168.7.248 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=2
3 | node243 | primary | * running | | default | 100 | 26 | host=192.168.7.243 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=2
4 | node249 | standby | running | node243 | default | 100 | 26 | host=192.168.7.249 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=3
ALTER ROLE
三、新密码登录测试
# 新的用户密码登录（‘beijing’）：
[kingbase@node3 bin]$ ./ksql -U esrep -W esrep
Password:
ksql (V8.0)
Type "help" for help.
# 查看.encpwd文件
[kingbase@node3 ~]$ cat .encpwd
*:*:*:system:MTIzNDU2
*:*:*:esrep:YmVpamluZw==
[kingbase@node3 ~]$ echo 'YmVpamluZw=='|base64 -d
beijing
# 所有节点密码都已经被修改
[kingbase@node1 ~]$ cat .encpwd
*:*:*:system:MTIzNDU2
*:*:*:esrep:YmVpamluZw==
[kingbase@node2 ~]$ cat .encpwd
*:*:*:system:MTIzNDU2
*:*:*:esrep:YmVpamluZw==
四、重启集群测试
[kingbase@node3 bin]$ ./sys_monitor.sh restart
2021-03-01 13:07:08 Ready to stop all DB ...
There is no service "node_export" running currently.
There is no service "postgres_ex" running currently.
There is no service "node_export" running currently.
There is no service "postgres_ex" running currently.
There is no service "node_export" running currently.
There is no service "postgres_ex" running currently.
2021-03-01 13:07:18 begin to stop repmgrd on "[192.168.7.248]".
2021-03-01 13:07:18 repmgrd on "[192.168.7.248]" already stopped.
2021-03-01 13:07:18 begin to stop repmgrd on "[192.168.7.243]".
2021-03-01 13:07:19 repmgrd on "[192.168.7.243]" already stopped.
2021-03-01 13:07:19 begin to stop repmgrd on "[192.168.7.249]".
2021-03-01 13:07:20 repmgrd on "[192.168.7.249]" already stopped.
2021-03-01 13:07:20 begin to stop DB on "[192.168.7.248]".
waiting for server to shut down.... done
server stopped
2021-03-01 13:07:21 DB on "[192.168.7.248]" stop success.
2021-03-01 13:07:21 begin to stop DB on "[192.168.7.249]".
sys_ctl: directory "/home/kingbase/cluster/R6HA/KHA/kingbase/data" does not exist
2021-03-01 13:07:23 DB on "[192.168.7.249]" stop success.
2021-03-01 13:07:23 begin to stop DB on "[192.168.7.243]".
waiting for server to shut down..... done
server stopped
2021-03-01 13:07:25 DB on "[192.168.7.243]" stop success.
2021-03-01 13:07:25 Done.
2021-03-01 13:07:25 Ready to start all DB ...
2021-03-01 13:07:25 begin to start DB on "[192.168.7.243]".
waiting for server to start.... done
server started
2021-03-01 13:07:27 execute to start DB on "[192.168.7.243]" success, connect to check it.
2021-03-01 13:07:28 DB on "[192.168.7.243]" start success.
2021-03-01 13:07:28 Try to ping trusted_servers on host 192.168.7.248 ...
2021-03-01 13:07:30 Try to ping trusted_servers on host 192.168.7.243 ...
2021-03-01 13:07:33 Try to ping trusted_servers on host 192.168.7.249 ...
2021-03-01 13:07:36 begin to start DB on "[192.168.7.248]".
waiting for server to start.... done
server started
2021-03-01 13:07:37 execute to start DB on "[192.168.7.248]" success, connect to check it.
2021-03-01 13:07:38 DB on "[192.168.7.248]" start success.
2021-03-01 13:07:38 begin to start DB on "[192.168.7.249]".
sys_ctl: directory "/home/kingbase/cluster/R6HA/KHA/kingbase/data" does not exist
2021-03-01 13:07:40 execute to start DB on "[192.168.7.249]" failed.
ID | Name | Role | Status | Upstream | Location | Priority | Timeline | Connection string
----+---------+---------+-----------+----------+----------+----------+----------+---------------------------------------------------------------------------------------------------------------------------------------------------
1 | node248 | standby | running | node243 | default | 90 | 26 | host=192.168.7.248 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=2
3 | node243 | primary | * running | | default | 100 | 26 | host=192.168.7.243 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=2
4 | node249 | standby | running | node243 | default | 100 | 26 | host=192.168.7.249 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=3
2021-03-01 13:07:40 The primary DB is started.
2021-03-01 13:07:45 Success to load virtual ip [192.168.7.240/24] on primary host [192.168.7.243].
2021-03-01 13:07:45 Try to ping vip on host 192.168.7.248 ...
2021-03-01 13:07:47 Try to ping vip on host 192.168.7.243 ...
2021-03-01 13:07:50 Try to ping vip on host 192.168.7.249 ...
2021-03-01 13:07:53 begin to start repmgrd on "[192.168.7.248]".
[2021-03-01 13:08:03] [NOTICE] using provided configuration file "/home/kingbase/cluster/R6HA/KHA/kingbase/bin/../etc/repmgr.conf"
[2021-03-01 13:08:03] [NOTICE] redirecting logging output to "/home/kingbase/cluster/R6HA/KHA/kingbase/hamgr.log"
2021-03-01 13:07:53 repmgrd on "[192.168.7.248]" start success.
2021-03-01 13:07:53 begin to start repmgrd on "[192.168.7.243]".
[2021-03-01 13:07:54] [NOTICE] using provided configuration file "/home/kingbase/cluster/R6HA/KHA/kingbase/bin/../etc/repmgr.conf"
[2021-03-01 13:07:54] [NOTICE] redirecting logging output to "/home/kingbase/cluster/R6HA/KHA/kingbase/hamgr.log"
2021-03-01 13:07:54 repmgrd on "[192.168.7.243]" start success.
2021-03-01 13:07:54 begin to start repmgrd on "[192.168.7.249]".
[2021-03-01 13:06:04] [NOTICE] using provided configuration file "/home/kingbase/cluster/R6HA/KHA/kingbase/bin/../etc/repmgr.conf"
[2021-03-01 13:06:04] [NOTICE] redirecting logging output to "/home/kingbase/cluster/R6HA/KHA/kingbase/hamgr.log"
2021-03-01 13:07:56 repmgrd on "[192.168.7.249]" start success.
ID | Name | Role | Status | Upstream | repmgrd | PID | Paused? | Upstream last seen
----+---------+---------+-----------+----------+---------+-------+---------+--------------------
1 | node248 | standby | running | node243 | running | 2625 | no | 0 second(s) ago
3 | node243 | primary | * running | | running | 22122 | no | n/a
4 | node249 | standby | running | node243 | running | 16939 | no | n/a
2021-03-01 13:08:08 Done.
# 查看集群节点状态信息
[kingbase@node3 bin]$ ./repmgr cluster show
ID | Name | Role | Status | Upstream | Location | Priority | Timeline | Connection string
----+---------+---------+-----------+----------+----------+----------+----------+---------------------------------------------------------------------------------------------------------------------------------------------------
1 | node248 | standby | running | node243 | default | 90 | 26 | host=192.168.7.248 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=2
3 | node243 | primary | * running | | default | 100 | 26 | host=192.168.7.243 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=2
4 | node249 | standby | running | node243 | default | 100 | 26 | host=192.168.7.249 user=esrep dbname=esrep port=54321 connect_timeout=10 keepalives=1 keepalives_idle=10 keepalives_interval=1 keepalives_count=3
