Installation on Primary/Standby Nodes

Prerequisites

A user group and a common user have been created.
All the server OSs and networks are functioning properly.
A common user must have the read, write, and execute permissions on the database package decompression path and installation path, and the installation path must be empty.
A common user has the execution permission on the downloaded openGauss package.
Before the installation, check whether all ports in the specified openGauss port matrix are occupied. If they are occupied, change the ports or stop the processes that uses the ports. For details about the port numbers, see the parameter description in step 3.

Procedure

Log in to the host where the package is installed as a common user and decompress the openGauss package to the installation directory.
```
tar -jxf openGauss-Server-x.x.x-openEuler20.03-x86_64.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
```
NOTE:
- -w: initializes the database password (specified by gs_initdb). This parameter is mandatory for security purposes.
- -p: specifies the port number of the primary openGauss node. The default value is 5432. The port number of the standby node is that of the primary node plus 200. The default port number is 5632.
- --multinode: determines whether the installation is performed on a single node or on primary/standby nodes.
- -h|--help: displays usage instructions.
- After the installation, the primary database node name is nodename1 and the standby database node name is nodename2.
- The installation path of the primary database node directory is /opt/software/openGauss/data/master, and that of the standby node directory is /opt/software/openGauss/data/slave, in which /opt/software/openGauss is the decompression path, and data/master(slave) is the newly created database node directory.

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