yum 安裝了 PostgreSQL
安裝
yum install https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-6-x86_64/pgdg-redhat-repo-42.0-11.noarch.rpm
yum install postgresql96
- 初始化數據庫
cd pgsql-9.6/
/usr/pgsql-9.6/bin/postgresql96-setup initdb
執行完畢顯示：
Initializing database ... OK
創建用戶組和用戶：
- 創建用戶組：
sudo groupadd postgresql
- 創建用戶：
sudo useradd -gpostgresql postgresql
實現開機自啓服務
systemctl enable postgresql-9.6
Created symlink from /etc/systemd/system/multi-user.target.wants/postgresql-9.6.service to /usr/lib/systemd/system/postgresql-9.6.service.
啓動數據庫服務
systemctl start postgresql-9.6
報錯情況下：
Job for postgresql-9.6.service failed because the control process exited with error code. See "systemctl status postgresql-9.6.service" and "journalctl -xe" for details.
解決方案1：
查看啓動狀態：systemctl status postgresql-9.6 有如下報錯：
● postgresql-9.6.service - PostgreSQL 9.6 database server
Loaded: loaded (/usr/lib/systemd/system/postgresql-9.6.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Wed 2020-06-10 13:26:43 CST; 26s ago
Docs: https://www.postgresql.org/docs/9.6/static/
Process: 24750 ExecStart=/usr/pgsql-9.6/bin/postmaster -D ${PGDATA} (code=exited, status=1/FAILURE)
Process: 24743 ExecStartPre=/usr/pgsql-9.6/bin/postgresql96-check-db-dir ${PGDATA} (code=exited, status=0/SUCCESS)
Main PID: 24750 (code=exited, status=1/FAILURE)
Jun 10 13:26:43 hecs-x-xlarge-2-linux-20200604174817 systemd[1]: Starting PostgreSQL 9.6 database server...
Jun 10 13:26:43 hecs-x-xlarge-2-linux-20200604174817 postmaster[24750]: < 2020-06-10 13:26:43.566 CST > LOG: redirecting log output to logging collector process
Jun 10 13:26:43 hecs-x-xlarge-2-linux-20200604174817 postmaster[24750]: < 2020-06-10 13:26:43.566 CST > HINT: Future log output will appear in directory "pg_log".
Jun 10 13:26:43 hecs-x-xlarge-2-linux-20200604174817 systemd[1]: postgresql-9.6.service: main process exited, code=exited, status=1/FAILURE
Jun 10 13:26:43 hecs-x-xlarge-2-linux-20200604174817 systemd[1]: Failed to start PostgreSQL 9.6 database server.
Jun 10 13:26:43 hecs-x-xlarge-2-linux-20200604174817 systemd[1]: Unit postgresql-9.6.service entered failed state.
Jun 10 13:26:43 hecs-x-xlarge-2-linux-20200604174817 systemd[1]: postgresql-9.6.service failed.
權限的問題，授權一下：
chmod 700 /var/lib/pgsql/9.6/data
再次啓動：正常了。
解決方案2：很有可能是以前安裝過PostgreSQL ，那就是需要刪除/var/lib/pgsql
rm -rf /var/lib/pgsql
再次啓動：正常了。
- 查看是否安裝成功
[root@hecs-x-xlarge-2-linux-20200604174817 data]# netstat -tlun | grep 5432 #postgres是佔用5432端口
tcp 0 0 0.0.0.0:5432 0.0.0.0:* LISTEN
tcp6 0 0 :::5432 :::* LISTEN