postgresql安装

1. 解压安装包

   # tar zxvf postgresql-12.4.tar.gz
   # cd postgresql-12.4
   

2. 编译并安装

   # ./configure --prefix=/usr/local/postgresql
   # make
   # make install
   

3. 新建并切换用户

   # addusr postgre
   # passwd postgre
   

4. 修改目录权限

   # chown -R postgre:postgre /usr/local/postgresql
   

5. 切换为postgre用户并修改环境变量

   # su - postgre
   # vim .bash_profile
   添加内容：
   PGHOME=/usr/local/postgresql
   export PGHOME
   
   PGDATA=/home/postgre/data/postgresql
   export PGDATA
   
   PATH=$PATH:$HOME/.local/bin:$HOME/bin:$PGHOME/bin
   # source .bash_profile
   

6. 初始化数据库

   # initdb
   # vim pg_hba.conf
   修改内容 IPv4 local connections:
   host    all             all             0.0.0.0/0               md5
   # vim postgresql.conf
   修改内容：
   listen_addresses = '*'
   

7. 创建日志目录

   # mkdir -p /home/postgre/logs/postgresql
   # cd /home/postgre/logs/postgresql
   # touch pg_server.log
   

8. 启动数据库

   # pg_ctl start -l /home/postgre/logs/postgresql/pg_server.log
   

9. 查看是否启动

   # ps -ef |grep postgre
   

10. 进入数据库(注意，默认的数据库名是postgres,如果不输入则默认为当前用户名，可能会提示数据库不存在)并修改密码

    # psql postgres
    # password
    查看数据库
    # l
    

11. 添加系统服务,vim /etc/systemd/system/postgresql.service

    [Unit]
    Description=PostgreSQL database server
    After=network.target
     
    [Service]
    Type=forking
     
    User=postgre
    Group=postgre
     
    # Port number for server to listen on
    Environment=PGPORT=5432
     
    # Location of database directory
    Environment=PGDATA=/home/postgre/data/postgresql
     
    # Where to send early-startup messages from the server (before the logging
    # options of postgresql.conf take effect)
    # This is normally controlled by the global default set by systemd
    # StandardOutput=syslog
     
    # Disable OOM kill on the postmaster
    OOMScoreAdjust=-1000
     
    #ExecStartPre=/usr/local/pgsql9.4/bin/postgresql-check-db-dir ${PGDATA}
    ExecStart=/usr/local/postgresql/bin/pg_ctl start -l /home/postgre/logs/postgresql/pg_server.log -D ${PGDATA} -s -o "-p ${PGPORT}" -w -t 300
    ExecStop=/usr/local/postgresql/bin/pg_ctl stop -D ${PGDATA} -s -m fast
     
    # Give a reasonable amount of time for the server to start up/shut down
    TimeoutSec=300
     
    [Install]
    WantedBy=multi-user.target
    

12. 重新加载服务、启动、设置开机启动

    # systemctl daemon-reload
    # systemctl start postgresql.service
    # systemctl enable postgresql.service