如何將包含SysV初始化腳本的RPM軟件包移植到systemd？

Question

我已經為守護程序創建了一個RPM軟件包，該軟件包在安裝時在/etc/init.d/下創建了服務初始化腳本，現在我想將該CPMOS7.1移植到RPM軟件包中，並使用systemd框架通過引導和管理來啟動服務。通過啟動/停止命令。

我找不到任何教程。 請幫忙。

編輯：我嘗試了msuchy給出的建議。

我嘗試過，這是我的觀察

基於sysV的框架（CentOS6.5）

[root@adil work]# /etc/init.d/daemon_script status
Service daemon: Stopped
[root@adil work]# /etc/init.d/daemon_script start
Starting daemon: Initializing daemon... [ OK ]
[root@adil work]#
[root@adil work]# /etc/init.d/daemon_script status
Service daemon: Running
[root@adil work]#
[root@adil work]# /etc/init.d/daemon_script stop
Shutting down parent daemon: [ OK ]
[root@adil work]# /etc/init.d/daemon_script status
Service daemon: Stopped
[root@adil work]#

===========
在基於systemd的框架上，我在CentOS7.1上安裝了相同的RPM

[root@localhost x86_64]# /etc/init.d/daemon_script
Usage: /etc/init.d/daemon_script {start|stop|restart|status}
[root@localhost x86_64]# /etc/init.d/daemon_script start
Starting daemon_script (via systemctl): Warning: Unit file of daemon_script.service changed on disk, 'systemctl daemon-reload' recommended.
Job for daemon_script.service failed. See 'systemctl status daemon_script.service' and 'journalctl -xn' for details.
[FAILED]
[root@localhost x86_64]# systemctl daemon-reload
[root@localhost x86_64]# systemctl status daemon_script.service
daemon_script.service - SYSV: start and stop Test daemon service.
Loaded: loaded (/etc/rc.d/init.d/daemon_script)
Active: failed (Result: exit-code) since Fri 2015-09-11 15:30:44 IST; 32s ago

Sep 11 15:30:44 localhost.localdomain systemd[1]: Starting SYSV: start and st...
Sep 11 15:30:44 localhost.localdomain systemd[1]: daemon_script.service: cont...
Sep 11 15:30:44 localhost.localdomain systemd[1]: Failed to start SYSV: start...
Sep 11 15:30:44 localhost.localdomain systemd[1]: Unit daemon_script.service ...
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost x86_64]# systemctl status daemon_script.service -l
daemon_script.service - SYSV: start and stop Test daemon service.
Loaded: loaded (/etc/rc.d/init.d/daemon_script)
Active: failed (Result: exit-code) since Fri 2015-09-11 15:30:44 IST; 46s ago

Sep 11 15:30:44 localhost.localdomain systemd[1]: Starting SYSV: start and stop Test daemon service....
Sep 11 15:30:44 localhost.localdomain systemd[1]: daemon_script.service: control process exited, code=exited status=203
Sep 11 15:30:44 localhost.localdomain systemd[1]: Failed to start SYSV: start and stop Test daemon service..
Sep 11 15:30:44 localhost.localdomain systemd[1]: Unit daemon_script.service entered failed state.
[root@localhost x86_64]#

journalctl -xn的輸出

-- Logs begin at Fri 2015-09-11 14:50:35 IST, end at Fri 2015-09-11 15:40:01 IST. --
Sep 11 15:31:03 localhost.localdomain systemd[1]: [/usr/lib/systemd/system/dm-event.socket:10] Unknown lvalue 'RemoveOnStop' in section 'Socket'
Sep 11 15:39:33 localhost.localdomain systemd[1]: Starting SYSV: start and stop Test daemon service....
-- Subject: Unit daemon_script.service has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit daemon_script.service has begun starting up.
Sep 11 15:39:33 localhost.localdomain systemd[8509]: Failed at step EXEC spawning /etc/rc.d/init.d/daemon_script: Exec format error Sep 11 15:39:33 localhost.localdomain systemd[8509]: Failed at step EXEC spawning /etc/rc.d/init.d/daemon_script: Exec format error
-- Subject: Process /etc/rc.d/init.d/daemon_script could not be executed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- The process /etc/rc.d/init.d/daemon_script could not be executed and failed.
--
-- The error number returned while executing this process is 8.
Sep 11 15:39:33 localhost.localdomain systemd[1]: daemon_script.service: control process exited, code=exited status=203
Sep 11 15:39:33 localhost.localdomain systemd[1]: Failed to start SYSV: start and stop Test daemon service..
-- Subject: Unit daemon_script.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit daemon_script.service has failed.
--
-- The result is failed.
Sep 11 15:39:33 localhost.localdomain systemd[1]: Unit daemon_script.service entered failed state.
Sep 11 15:40:01 localhost.localdomain systemd[1]: Created slice user-0.slice.
-- Subject: Unit user-0.slice has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit user-0.slice has finished starting up.
--
-- The start-up result is done.
Sep 11 15:40:01 localhost.localdomain systemd[1]: Starting Session 7 of user root.
-- Subject: Unit session-7.scope has begun with start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit session-7.scope has begun starting up.
Sep 11 15:40:01 localhost.localdomain systemd[1]: Started Session 7 of user root.
-- Subject: Unit session-7.scope has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit session-7.scope has finished starting up.
--
-- The start-up result is done.
Sep 11 15:40:01 localhost.localdomain CROND[8528]: (root) CMD (/usr/lib64/sa/sa1 1 1)
[root@localhost x86_64]#

Answer 1

您不需要遷移腳本。

可能會更好，並且您可以利用Systemd的一些有趣功能，您的文件會更小。 但你並不需要遷移。 Systemd也可以與SysV初始化文件一起正常工作。

您無法在CentOS 7安裝上找到任何SysV初始化文件，因為Red Hat打包程序（創建了CentOS）致力於打包並將所有SysV文件遷移到單元文件。 但是您不需要。

這只是您需要執行的一項任務。 放置新的SysV文件后，必須使用以下命令重新加載systemd管理器配置

# systemctl daemon-reload

就這些。 我舉一個小例子

# cat /etc/init.d/foo
#!/usr/bin/sh
echo ahoy

# chmod a+x /etc/init.d/foo
# systemctl start foo
Failed to start foo.service: Unit foo.service failed to load: No such file or directory.
# systemctl daemon-reload
# systemctl start foo
# journalctl -xn
-- Subject: Unit foo.service has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit foo.service has finished starting up.
-- 
-- The start-up result is done.
# service foo start
ahoy

因此，您可以像在CentOS 6上一樣使用所有命令（chkconfig，service）。如果有時間，您可以學習man systemd.unit （5）和其他手冊頁（請參閱該手冊的“另請參閱”）。手冊頁）。