Centos7下源编译安装Postgresql 并设置开机自动启动postgresql.serivce 服务相关研究

编写开机自动启动服务脚本：

# cat >> /usr/lib/systemd/system/postgresql.service >> EOF

[Unit]
Description=PostgreSQL database server
After=network.target

[Service]
Type=forking

User=postgres
Group=postgres

# Port number for server to listen on
Environment=PGPORT=5432

# Location of database directory
Environment=PGDATA=/usr/local/pgsql9.4/data

# 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/pgsql9.4/bin/pg_ctl start -D ${PGDATA} -s -o "-p ${PGPORT}" -w -t 300
ExecStop=/usr/local/pgsql9.4/bin/pg_ctl stop -D ${PGDATA} -s -m fast
ExecReload=/usr/local/pgsql9.4/bin/pg_ctl reload -D ${PGDATA} -s

# Give a reasonable amount of time for the server to start up/shut down
TimeoutSec=300

[Install]
WantedBy=multi-user.target

EOF

添加可执行权限：

chmod 754 /usr/lib/systemd/system/postgresql.service

设置为开机自启动：

systemctl enable postgresql.service

常用指令(以postgresql服务为例)：

启动某服务: 

systemctl  start  postgresql.service

停止某服务:

systemctl stop postgresql.service

重启某服务:

systemctl restart postgresql.service
service postgresql restart

使某服务自动启动(如tomcat服务):

systemctl enable postgresql.service

使某服务不自动启动:

systemctl disable postgresql.service

检查服务状态:

systemctl   status  postgresql.service （服务详细信息）
systemctl   is-active postgresql.service（仅显示是否Active)

显示所有已启动的服务:

systemctl   list-units --type=service