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Handlers for generate systemd with custom dependencies

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This commit includes:
* Handlers for generate systemd unit
  with manually defined dependencies such as:
  Wants=, After= and Requires=

* The new unit and e2e tests for checking generated systemd units
  for container and pod with custom dependencies

* Documented descriptions for custom dependencies options

Signed-off-by: Eugene (Evgenii) Shubin <esendjer@gmail.com>
This commit is contained in:
esendjer
2022-01-19 14:56:37 +05:00
parent 094b11cbcb
commit b9a2d8698a
13 changed files with 660 additions and 12 deletions
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16
docs/source/markdown/podman-generate-systemd.1.md
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@ -68,6 +68,22 @@ Set the systemd unit name prefix for pods. The default is *pod*.
Set the systemd unit name separator between the name/id of a container/pod and the prefix. The default is *-*.
#### **--wants**=*dependency_name*
Add the systemd unit wants (`Wants=`) option, that this service is (weak) dependent on. This option may be specified more than once. This option does not influence the order in which services are started or stopped.
User-defined dependencies will be appended to the generated unit file, but any existing options such as needed or defined by default (e.g. `online.target`) will **not** be removed or overridden.
#### **--after**=*dependency_name*
Add the systemd unit after (`After=`) option, that ordering dependencies between the list of dependencies and this service. This option may be specified more than once.
User-defined dependencies will be appended to the generated unit file, but any existing options such as needed or defined by default (e.g. `online.target`) will **not** be removed or overridden.
#### **--requires**=*dependency_name*
Set the systemd unit requires (`Requires=`) option. Similar to wants, but declares a stronger requirement dependency.
#### **--template**
Add template specifiers to run multiple services from the systemd unit file.