HAC cluster modifying administrator user password

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Environmental Science
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Environmental Science
system platform ：Linux x86-64 Red Hat Enterprise Linux 7
edition ：4.5.6,4.5.7
Document purpose
This document is used to guide HAC The cluster modifies the administrator user password

Details
1、 Check cluster status , Use A、B There are two ways to judge

Method A： Use the cluster command , Make sure TL The timeline is consistent ,Lag in MB The data synchronization delay should not be too high , The best delay is 0.

[[email protected] ~]# hghactl list

+ Cluster: ha (7072256965608815760) -------+---------+----+-----------+

| Member   | Host                | Role    | State   | TL | Lag in MB |

+----------+---------------------+---------+---------+----+-----------+

| hghac228 | 192.168.80.228:5866 | Leader  | running |  6 |           |

| hghac230 | 192.168.80.230:5866 | Replica | running |  6 |         0 |

+----------+---------------------+---------+---------+----+-----------+

Method B： Each node queries the process , Yes sender The node is the main library , Yes receiver The node is a standby database

ps -ef | grep sender

root     26418  3233  0 6 month 11 ?    00:00:22 postgres: c: walsender sysdba 192.168.80.228(45186) streaming 0/16000000

ps -ef | grep receiver

root      3372  3348  0 6 month 11 ?     00:13:54 postgres: c: walreceiver   streaming 0/16000000

2、 Pause the cluster

（ Any node can execute , Suspending the cluster only stops the active / standby switchover of the cluster , It does not affect the use of the database ）

hghactl  pause

3、 Change Password （ It can only be executed in the main library ）

highgo=# alter user sysdba with password '[email protected]!';

4、 The primary and secondary databases modify password files

vim ~/.pgpass

#hostname:port:database:username:password

localhost:5866:highgo:sysdba:[email protected]12345

localhost:5866:highgo:syssso:[email protected]12345

The colon is the separator , The penultimate user name , The last database password , Change the password to the modified password , Save and exit .
5、 The primary and standby databases modify the cluster configuration file

vim /opt/HighGo/tools/hghac/hghac.yaml

authentication:

    replication:

      password: [email protected]123

      username: sysdba

    rewind:

      password: [email protected]123

      username: sysdba

    sysdba:

      password: [email protected]123

    syssso:

      password: [email protected]123

    syssao:

      password: [email protected]123

Change the password according to the corresponding user name , Save and exit .

6、 Repository modification data In the catalog postgresql.auto.conf file

vim $PGDATA/postgresql.auto.conf

primary_conninfo = 'user=sysdba password=''[email protected]'' host=192.168.80.228 port=5866 sslmode=prefer sslcompression=0 gssencmode=disable krbsrvname=postgres target_session_attrs=any'

Be careful ：password The front one user by sysdba, That is, modify the user sysdba Password

7、 Recovery cluster （ Any node can execute ）

hghactl  resume

8、 Restart the cluster to take effect （ Any node can execute ）

hghactl restart c

Be careful ：

Last parameter c Is the name of the cluster , Check the method

ps -ef | grep -v grep |grep post |awk '{print $9}'|tail -1|awk '{sub(/.$/,"")}1'

9、 View the cluster status

hghactl  list

10、 Reinitialize all nodes hgproxy

（ If not used hgproxy Please skip this step ）

systemctl stop hgproxy-4.0.2.service   -- Stop hgproxy service ,hgproxy Please use tab Health Supplement (proxy Version of the iteration service Dissimilarity )

proxy_ctl  init -h 192.168.1.54  -U sysdba -d highgo -p 5866  -- initialization 

systemctl start hgproxy-4.0.2.service  -- start-up hgproxy service 

11、 other

perform hghactl Wait for the cluster command prompt “ Command not found ”, Please configure the environment variable , Refer to the following ：

vim ~/.bash_profile

 

export PGPORT=5866

export PGUSER=sysdba

export PGDATABASE=highgo

export PGHOME=/opt/HighGo4.5.7-see

export PGDATA=/opt/HighGo4.5.7-see/data

export PATH=$PGHOME/bin:$PATH:$HOME/bin:/opt/HighGo/tools/hgproxy/bin:/opt/HighGo/tools/hghac:/opt/HighGo/tools/hghac/etcd

export LD_LIBRARY_PATH=$PGHOME/lib:/usr/lib64:$LD_LIBRARY_PATH

export ETCDCTL_ENDPOINTS=http://10.1.194.182:2379,http://10.1.194.191:2379,http://10.1.194.192:2379

export PATRONICTL_CONFIG_FILE=/opt/HighGo/tools/hghac/hghac-see.yaml

 

source ~/.bash_profile

Be careful ：

1、 You need to modify the actual path of environment variables according to the actual situation , have access to find Command to find the file path 

 example ： lookup hghac   find / -iname hghac -print

2、ETCDCTL_ENDPOINTS Three ip It needs to be modified to configuration etcd Three node ip, You can refer to /opt/HighGo/tools/hghac/hghac-see.yaml In the document etcd:hosts