无法启动postgresql.service？

Question

我正在使用arch linux(4.8.13-1-ARCH).我正在尝试按照此处的说明设置PostgreSQL .

演出结束后

[postgres@BitBox ~]$ initdb --locale $LANG -E UTF8 -D '/var/lib/postgres/data'
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.UTF-8".
The default text search configuration will be set to "english".

Data page checksums are disabled.

fixing permissions on existing directory /var/lib/postgres/data ... ok
creating subdirectories ... ok
selecting default max_connections ... 100
selecting default shared_buffers ... 128MB
selecting dynamic shared memory implementation ... posix
creating configuration files ... ok
running bootstrap script ... ok
performing post-bootstrap initialization ... ok
syncing data to disk ... ok

WARNING: enabling "trust" authentication for local connections
You can change this by editing pg_hba.conf or using the option -A, or
--auth-local and --auth-host, the next time you run initdb.

Success. You can now start the database server using:

pg_ctl -D /var/lib/postgres/data -l logfile start

成功之后,我使用exit命令返回普通用户.

[postgres@BitBox ~]$ exit
logout

然后,在尝试启动postgresql.service时,我收到以下错误:

[code_master5@BitBox ~]$ sudo systemctl start postgresql.service
Failed to start postgresql.service: Unit postgresql.service not found.

我甚至没有得到服务的状态:

[code_master5@BitBox ~]$ sudo systemctl status postgresql.service
Unit postgresql.service could not be found.

我被卡住了!

Answer 1

最后,我想出了这一个.已有文件存在

/usr/lib/systemd/system/postgresql-9.6.service

所以,可能是由于这个文件的存在,我无法启动postgresql.service.然后我尝试启动postgresql-9.6.service,如下所示:

[code_master5@BitBox ~]$ sudo systemctl start postgresql-9.6.service
Failed to start postgresql-9.6.service: Unit postgresql-9.6.service not found.

并且,正如您可以看到输出,它再次失败.

我只是使用sudo删除文件,因为我认为可能是postgresql.service文件由于此文件的存在而没有被相关程序创建.然后我重新启动了系统.从那时起它工作正常,你可以看到下面的输出:

[code_master5@BitBox ~]$ sudo systemctl status postgresql.service
[sudo] password for code_master5: 
? postgresql.service - PostgreSQL database server
Loaded: loaded (/usr/lib/systemd/system/postgresql.service; enabled; vendor p
Active: active (running) since Sat 2017-01-28 09:31:30 IST; 7h ago
Main PID: 342 (postgres)
Tasks: 6 (limit: 4915)
CGroup: /system.slice/postgresql.service
       ??342 /usr/bin/postgres -D /var/lib/postgres/data
       ??358 postgres: checkpointer process   
       ??359 postgres: writer process   
       ??360 postgres: wal writer process   
       ??361 postgres: autovacuum launcher process   
       ??362 postgres: stats collector process   

Jan 28 09:31:26 BitBox systemd[1]: Starting PostgreSQL database server...
Jan 28 09:31:28 BitBox postgres[340]: FATAL:  the database system is starting up
Jan 28 09:31:28 BitBox postgres[340]: LOG:  database system was shut down at 201
Jan 28 09:31:29 BitBox postgres[340]: FATAL:  the database system is starting up
Jan 28 09:31:29 BitBox postgres[340]: LOG:  MultiXact member wraparound protecti
Jan 28 09:31:29 BitBox postgres[340]: LOG:  database system is ready to accept c
Jan 28 09:31:29 BitBox postgres[340]: LOG:  autovacuum launcher started
Jan 28 09:31:30 BitBox systemd[1]: Started PostgreSQL database server.

我当然想警告那些有同样问题的人.请自行承担风险.因为这些是系统文件.弄乱这些可能会破坏你的周末!

我对此仍然有点困惑.欢迎解释!

Answer 2

我发现这两个命令非常方便。虽然这个帖子很旧，但也许其他人将来会从中受益。

systemctl list-units|grep postgresql
service postgresql-12.service restart

Answer 3

尝试这个：

service postgresql-10.service restart
service postgresql-XX.service restart