問題描述
剛剛從 14.04 升級了我的係統。 LTS 到 16.04.1 LTS，postgresql 不在 systemd 上啟動：
/etc/init.d/postgresql start
[ ok ] Starting postgresql (via systemctl): postgresql.service
# /etc/init.d/postgresql status
● postgresql.service - PostgreSQL RDBMS
Loaded: loaded (/lib/systemd/system/postgresql.service; enabled; vendor preset: enabled)
Active: active (exited) since Вт 2016-08-09 13:40:51 MSK; 3min 23s ago
Process: 23142 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
Main PID: 23142 (code=exited, status=0/SUCCESS)Seems that
似乎 systemd 腳本包含錯誤的數據：
# cat /lib/systemd/system/postgresql.service
# systemd service for managing all PostgreSQL clusters on the system. This
# service is actually a systemd target, but we are using a service since
# targets cannot be reloaded.
[Unit]
Description=PostgreSQL RDBMS
[Service]
Type=oneshot
ExecStart=/bin/true
ExecReload=/bin/true
RemainAfterExit=on
[Install]
WantedBy=multi-user.target
postgresql 的正確腳本應該是什麽？
最佳回答
Systemd 應該使用來自 /etc/init.d 的腳本。相反，systemd 使用某種模板文件。要解決此問題，請按照以下步驟操作：
-
刪除無效的服務腳本:\n
# rm /lib/systemd/system/postgresql.service -
重新加載守護程序腳本：\n
# systemctl daemon-reload -
啟用 postgresql 服務:\n
# systemctl enable postgresql
之後，您將能夠使用任何首選變體啟動 postgres： sudo systemctl start postgresql 、 sudo service postgresql start 或 sudo /etc/init.d/postgresql start 。要檢查 postgresql 是否實際運行，請檢查服務狀態： sudo systemctl status postgresql 。它看起來像：
% sudo systemctl status postgresql
● postgresql.service - LSB: PostgreSQL RDBMS server
Loaded: loaded (/etc/init.d/postgresql; bad; vendor preset: enabled)
Active: active (running) since Пт 2016-08-12 10:13:43 MSK; 1h 37min ago
Docs: man:systemd-sysv-generator(8)
CGroup: /system.slice/postgresql.service
├─4086 /usr/lib/postgresql/9.5/bin/postgres -D /var/lib/postgresql/9.5/main -c config_file=/etc/postgresql/9.5/main/postgresql.conf
├─4099 postgres: checkpointer process
├─4100 postgres: writer process
├─4101 postgres: wal writer process
├─4102 postgres: autovacuum launcher process
└─4103 postgres: stats collector process
авг 12 10:13:40 ubuntu-precise systemd[1]: Starting LSB: PostgreSQL RDBMS server...
авг 12 10:13:40 ubuntu-precise postgresql[4009]: * Starting PostgreSQL 9.5 database server
авг 12 10:13:43 ubuntu-precise postgresql[4009]: ...done.
авг 12 10:13:43 ubuntu-precise systemd[1]: Started LSB: PostgreSQL RDBMS server.
次佳回答
如果您提供正確的版本和集群名稱，這應該可以開箱即用。
假設您正在運行版本 9.5 並且集群稱為 main ：
開始： systemctl start postgresql@9.5-main
停止：systemctl stop postgresql@9.5-main
狀態：systemctl status postgresql@9.5-main
啟動時啟用自動啟動：systemctl enable postgresql@9.5-main
啟動時禁用自動啟動：systemctl disable postgresql@9.5-main
foo@postgres:~$ systemctl status postgresql@9.5-main
● postgresql@9.5-main.service - PostgreSQL Cluster 9.5-main
Loaded: loaded (/lib/systemd/system/postgresql@.service; disabled; vendor preset: enabled)
Active: active (running) since Fri 2017-03-31 17:44:46 CEST; 59s ago
Main PID: 4546 (postgres)
CGroup: /system.slice/system-postgresql.slice/postgresql@9.5-main.service
├ ─ 4546 /usr/lib/postgresql/9.5/bin/postgres -D /var/lib/postgresql/9.5/main -c config_file=/etc/postgresql/9.5/main/postgresql.conf
├ ─ 4548 postgres: checkpointer process
├ ─ 4549 postgres: writer process
├ ─ 4550 postgres: wal writer process
├ ─ 4551 postgres: autovacuum launcher process
└ ─ 4552 postgres: stats collector process
Mar 31 17:44:44 postgres postgres[4546]: [1-2] 2017-03-31 17:44:44 CEST [4546] @ HINT: Future log output will go to log destination "syslog".
Mar 31 17:44:44 postgres postgres[4547]: [2-1] 2017-03-31 17:44:44 CEST [4547] @ LOG: database system was shut down at 2017-03-31 17:44:43 CEST
Mar 31 17:44:44 postgres postgres[4547]: [3-1] 2017-03-31 17:44:44 CEST [4547] @ LOG: MultiXact member wraparound protections are now enabled
Mar 31 17:44:44 postgres postgres[4546]: [2-1] 2017-03-31 17:44:44 CEST [4546] @ LOG: database system is ready to accept connections
Mar 31 17:44:44 postgres postgres[4551]: [2-1] 2017-03-31 17:44:44 CEST [4551] @ LOG: autovacuum launcher started
Mar 31 17:44:45 postgres postgres[4553]: [3-1] 2017-03-31 17:44:45 CEST [4553] [unknown]@[unknown] LOG: incomplete startup packet
Mar 31 17:44:46 postgres systemd[1]: Started PostgreSQL Cluster 9.5-main.
Mar 31 17:44:47 postgres systemd[1]: Reloading PostgreSQL Cluster 9.5-main.
Mar 31 17:44:47 postgres postgres[4546]: [3-1] 2017-03-31 17:44:47 CEST [4546] @ LOG: received SIGHUP, reloading configuration files
Mar 31 17:44:47 systemd[1]: Reloaded PostgreSQL Cluster 9.5-main.