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Systemd postgresql 启动脚本

tag-icon • tag-icon linux scripting systemd postgresql
Systemd postgresql 启动脚本

我正在将 postgresql 安装到第二台服务器上

以前我安装了 postgresql 然后使用提供的脚本

./contrib/start-scripts/linux

放入正确的目录

# cp ./contrib/start-scripts/linux /etc/rc.d/init.d/postgresql92
# chmod 755 /etc/rc.d/init.d/postgresql92

然后我可以按预期执行

# service postgresql92 start

然而，新机器正在使用 Systemd，看起来有一种完全不同的方法来做到这一点

我不想破解这个并毁掉一些东西，所以我想知道是否有人可以为我指明如何实现相同结果的正确方向

答案1

从源安装时，您需要添加与源安装配合使用的 systemd 单元文件。对于 RHEL、Fedora，我的单元文件如下所示：

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

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

[Service]
Type=forking

User=postgres
Group=postgres

# 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
# ... but allow it still to be effective for child processes
# (note that these settings are ignored by Postgres releases before 9.5)
Environment=PG_OOM_ADJUST_FILE=/proc/self/oom_score_adj
Environment=PG_OOM_ADJUST_VALUE=0

# Maximum number of seconds pg_ctl will wait for postgres to start.  Note that
# PGSTARTTIMEOUT should be less than TimeoutSec value.
Environment=PGSTARTTIMEOUT=270

Environment=PGDATA=/usr/local/pgsql/data


ExecStart=/usr/local/pgsql/bin/pg_ctl start -D ${PGDATA} -s -w -t ${PGSTARTTIMEOUT}
ExecStop=/usr/local/pgsql/bin/pg_ctl stop -D ${PGDATA} -s -m fast
ExecReload=/usr/local/pgsql/bin/pg_ctl reload -D ${PGDATA} -s

# Give a reasonable amount of time for the server to start up/shut down.
# Ideally, the timeout for starting PostgreSQL server should be handled more
# nicely by pg_ctl in ExecStart, so keep its timeout smaller than this value.
TimeoutSec=300

[Install]
WantedBy=multi-user.target

然后在启动时启用服务并启动 PostgreSQL 服务：

$ sudo systemctl daemon-reload # load the updated service file from disk
$ sudo systemctl enable postgresql
$ sudo systemctl start postgresql

答案2

# systemctl start postgresql.service

某些环境会转换service <name> start为systemctl start <name>.service，但您不必依赖它。

答案3

上面发布的 systemctl 单元文件对我帮助很大，但是要创建您需要的文件，您只需将其放在上面：

/etc/systemd/system/postgresql92.service
systemctl enable postgresql92.service
systemctl start postgresql92.service

考虑根据您的安装更改 binay pg_ctl 路径，如果您想运行另一个实例，您还必须更改默认侦听端口：

ExecStart=/usr/local/pgsql/bin/pg_ctl -o "-p 5489"

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