How to Replace Your System with OpenEuler and OpenGauss: A Step‑by‑Step Guide

System Domestic Replacement Solution OpenEuler+OpenGauss

Company requires domestic replacement of all systems; this guide explores installing the Chinese‑made OS openEuler and the database openGauss on a server or virtual machine (VMware used).

1. ISO download

Download the latest openEuler ISO from the official site.

2. Install OpenEuler

Tip: Run VMware as administrator

Follow the installation screenshots below.

2.1 Install openGauss (method 1)

Make sure network is enabled

Click “Start Installation” and wait for completion.

When the login screen appears, the installation succeeded. Log in with the root account and password.

Successfully entered the system.

3. Related configuration

3.1 Configure yum source

sed -i 's|http://repo.openeuler.org/|https://mirrors.huaweicloud.com/openeuler/|g' /etc/yum.repos.d/openEuler.repo

cat /etc/yum.repos.d/openEuler.repo

Run the following commands:

yum clean all
yum makecache
yum -y update

Optional (install development tools):

yum -y install gcc gcc-c++ pcre pcre-devel gd-devel openssl openssl-devel zlib zlib-devel

Disable firewall:

sudo systemctl stop firewalld
sudo systemctl disable firewalld

3.2 Install common utilities

yum -y install tar
yum -y install vim
yum -y install htop

4. OpenGauss installation and usage

4.1 Manual installation if not selected during OS install

Run: yum -y install opengauss Wait for the installation to finish.

4.2 OpenGauss configuration and usage

Switch to the opengauss user:

su - opengauss

Check the process:

ps ux | grep gaussdb

Modify postgresql.conf: vim postgresql.conf Set:

listen_addresses = '*'
port = 7654  # adjust as needed

Modify pg_hba.conf and add a line (see image).

Restart OpenGauss:

cd /usr/local/opengauss/bin
gs_ctl restart

Change the password:

ALTER ROLE opengauss PASSWORD 'your_password';

Create a new user and grant privileges:

CREATE USER testuser WITH PASSWORD 'your_password';
GRANT ALL PRIVILEGES TO testuser;

4.3 OpenGauss visual interface: Data Studio

Download Data Studio from the Huawei Cloud console (requires JDK 1.8+).

Connect using IP address and default port 7654.

Connection successful, you can now use the database.

4.4 OpenGauss code integration (Java)

Repository: https://gitee.com/fengshuq/demo2.git

5. Related issues

1. Ping differences (www.baidu.com)

cd /etc/sysconfig/network-scripts/

Edit the file and set ONBOOT=yes to enable the network at boot.

2. Configure static IP for internal server

cd /etc/sysconfig/network-scripts/

Further configuration steps are omitted for brevity.