Systemd Praxis Lösungen: Unterschied zwischen den Versionen
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Jan 10 12:02:16 debian-test systemd[1]: Starting Simple Unit... | Jan 10 12:02:16 debian-test systemd[1]: Starting Simple Unit... | ||
| − | Jan 10 12:02:16 debian-test systemd[1]: date1.service: Succeeded. | + | '''Jan 10 12:02:16 debian-test systemd[1]: date1.service: Succeeded.''' |
Jan 10 12:02:16 debian-test systemd[1]: Finished Simple Unit. | Jan 10 12:02:16 debian-test systemd[1]: Finished Simple Unit. | ||
| + | <span id="unit-abhängigkeiten-definieren"></span> | ||
| + | = Unit Abhängigkeiten definieren = | ||
| + | |||
| + | * systemctl enable date1 | ||
| + | * systemctl enable date2 | ||
| + | * systemctl enable date3 | ||
| + | * reboot | ||
| + | * Die Skripte werden in einer zufälligen Reihenfolge gestartet | ||
| + | * cat /etc/systemd/system/date1.service | ||
| + | |||
| + | <!-----> | ||
| + | [Unit] | ||
| + | Description=Simple Unit | ||
| + | Wants=date2.service | ||
| + | After=date2.service | ||
| + | |||
| + | [Service] | ||
| + | Type='''oneshot''' | ||
| + | ExecStart=/usr/local/sbin/test-system.sh 1 | ||
| + | |||
| + | [Install] | ||
| + | WantedBy=default.target | ||
| + | * cat /etc/systemd/system/date2.service | ||
| + | |||
| + | <!-----> | ||
| + | [Unit] | ||
| + | Description=Simple Unit | ||
| + | Wants=date3.service | ||
| + | After=date3.service | ||
| + | |||
| + | [Service] | ||
| + | Type='''oneshot''' | ||
| + | ExecStart=/usr/local/sbin/test-system.sh 2 | ||
| + | |||
| + | [Install] | ||
| + | WantedBy=default.target | ||
| + | * cat /etc/systemd/system/date3.service | ||
| + | |||
| + | <!-----> | ||
| + | [Unit] | ||
| + | Description=Simple Unit | ||
| + | |||
| + | [Service] | ||
| + | Type='''oneshot''' | ||
| + | ExecStart=/usr/local/sbin/test-system.sh 3 | ||
| + | |||
| + | [Install] | ||
| + | WantedBy=default.target | ||
| + | <ul> | ||
| + | <li><p>tail -n 3 /tmp/test-system.log</p> | ||
| + | <p>test-system-3 Tue 10 Jan 2023 12:17:37 PM CET test-system-2 Tue 10 Jan 2023 12:17:37 PM CET test-system-1 Tue 10 Jan 2023 12:17:37 PM CET</p></li></ul> | ||
Version vom 10. Januar 2023, 11:18 Uhr
Erstellen von Units
- cat /etc/systemd/system/date1.service
[Unit] Description=Simple Unit [Service] Type=simple ExecStart=/usr/local/sbin/test-system.sh 1 [Install] WantedBy=default.target
- cat /etc/systemd/system/date2.service
[Unit] Description=Simple Unit [Service] Type=simple ExecStart=/usr/local/sbin/test-system.sh 2 [Install] WantedBy=default.target
- cat /etc/systemd/system/date3.service
[Unit] Description=Simple Unit [Service] Type=simple ExecStart=/usr/local/sbin/test-system.sh 3 [Install] WantedBy=default.target
- systemctl start date1
- systemctl start date2
- systemctl start date3
- tail /tmp/test-system.log
Analyse der gestarteten Units
- RemainAfterExit=yes hinterlässt den Service im activen Zustand
- systemctl status date3
● date3.service - Simple Unit
Loaded: loaded (/etc/systemd/system/date3.service; disabled; vendor preset: enabled)
Active: active (exited) since Tue 2023-01-10 11:17:02 CET; 40min ago
Main PID: 11089 (code=exited, status=0/SUCCESS)
Tasks: 0 (limit: 1129)
Memory: 0B
CPU: 0
CGroup: /system.slice/date3.service
Jan 10 11:17:02 debian-test systemd[1]: Starting Simple Unit...
Jan 10 11:17:02 debian-test systemd[1]: Finished Simple Unit.
- systemctl status date1
● date1.service - Simple Unit Loaded: loaded (/etc/systemd/system/date1.service; disabled; vendor preset: enabled) Active: inactive (dead) since Tue 2023-01-10 12:02:16 CET; 46s ago Process: 13868 ExecStart=/usr/local/sbin/test-system.sh 1 (code=exited, status=0/SUCCESS) Main PID: 13868 (code=exited, status=0/SUCCESS) CPU: 7ms Jan 10 12:02:16 debian-test systemd[1]: Starting Simple Unit... Jan 10 12:02:16 debian-test systemd[1]: date1.service: Succeeded. Jan 10 12:02:16 debian-test systemd[1]: Finished Simple Unit.
Unit Abhängigkeiten definieren
- systemctl enable date1
- systemctl enable date2
- systemctl enable date3
- reboot
- Die Skripte werden in einer zufälligen Reihenfolge gestartet
- cat /etc/systemd/system/date1.service
[Unit] Description=Simple Unit Wants=date2.service After=date2.service [Service] Type=oneshot ExecStart=/usr/local/sbin/test-system.sh 1 [Install] WantedBy=default.target
- cat /etc/systemd/system/date2.service
[Unit] Description=Simple Unit Wants=date3.service After=date3.service [Service] Type=oneshot ExecStart=/usr/local/sbin/test-system.sh 2 [Install] WantedBy=default.target
- cat /etc/systemd/system/date3.service
[Unit] Description=Simple Unit [Service] Type=oneshot ExecStart=/usr/local/sbin/test-system.sh 3 [Install] WantedBy=default.target
tail -n 3 /tmp/test-system.log
test-system-3 Tue 10 Jan 2023 12:17:37 PM CET test-system-2 Tue 10 Jan 2023 12:17:37 PM CET test-system-1 Tue 10 Jan 2023 12:17:37 PM CET