Installation of One Primary and One Standby Nodes

Procedure

Create a user group dbgroup.
```
groupadd dbgroup
```
Create a common user omm in the dbgroup user group and set the password to Gauss_234.
```
useradd -g dbgroup omm
 passwd Gauss_234
```
Log in to the host where the package is installed as user omm and decompress the openGauss package to the installation directory (for example, /opt/software/openGauss).
```
tar -jxf openGauss-x.x.x-openEuler-64bit.tar.bz2 -C /opt/software/openGauss
```
Assume that the decompressed package is stored in the /opt/software/openGauss directory. Go to the simpleInstall directory.
```
cd /opt/software/openGauss/simpleInstall
```
Run the install.sh script to install openGauss.
```
sh install.sh  -w xxxx  --multinode
```
In the preceding command, -w indicates the initial database password (specified by gs_initdb). This parameter is mandatory for security purposes.

After the installation is complete, check whether the process is normal by using ps and gs_ctl.

ps ux | grep gaussdb
gs_ctl query -D /opt/software/openGauss/data/master

Run the ps command to display information similar to the following:

omm  4879 11.8 1.1 2082452 373832 pts/0  Sl   14:26   8:29 /opt/software/openGauss/bin/gaussdb -D /opt/software/openGauss/data/master -M primary

omm  5083  1.1  0.9 1819988 327200 pts/0  Sl   14:26   0:49 /opt/software/openGauss/bin/gaussdb -D /opt/software/openGauss/data/slave -M standby

omm      20377  0.0  0.0 119880  1216 pts/0    S+   15:37   0:00 grep --color=auto gaussdb

Run the gs_ctl command to display information similar to the following:

gs_ctl query ,datadir is /opt/software/openGauss/data/master
HA state:
    local_role                     : Primary
    static_connections             : 1
    db_state                       : Normal
    detail_information             : Normal

Senders info:
    sender_pid                     : 5165
    local_role                     : Primary
    peer_role                      : Standby
    peer_state                     : Normal
    state                          : Streaming
    sender_sent_location           : 0/4005148
    sender_write_location          : 0/4005148
    sender_flush_location          : 0/4005148
    sender_replay_location         : 0/4005148
    receiver_received_location     : 0/4005148
    receiver_write_location        : 0/4005148
    receiver_flush_location        : 0/4005148
    receiver_replay_location       : 0/4005148
    sync_percent                   : 100%
    sync_state                     : Sync
    sync_priority                  : 1
    sync_most_available            : Off
    channel                        : 10.244.44.52:27001-->10.244.44.52:35912

 Receiver info:
No information