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Add support for the unless-stopped restart policy

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We initially believed that implementing this required support for
restarting containers after reboot, but this is not the case.
The unless-stopped restart policy acts identically to the always
restart policy except in cases related to reboot (which we do not
support yet), but it does not require that support for us to
implement it.

Changes themselves are quite simple, we need a new restart policy
constant, we need to remove existing checks that block creation
of containers when unless-stopped was used, and we need to update
the manpages.

Fixes #6508

Signed-off-by: Matthew Heon <matthew.heon@pm.me>
This commit is contained in:
Matthew Heon
2020-06-08 15:15:16 -04:00
committed by Matthew Heon
parent 1acd2adccb
commit 6f1440a3ec
6 changed files with 24 additions and 10 deletions
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1
docs/source/markdown/podman-create.1.md
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@ -676,6 +676,7 @@ Valid values are:
- `no` : Do not restart containers on exit
- `on-failure[:max_retries]` : Restart containers when they exit with a non-0 exit code, retrying indefinitely or until the optional max_retries count is hit
- `always` : Restart containers when they exit, regardless of status, retrying indefinitely
- `unless-stopped` : Identical to **always**
Please note that restart will not restart containers after a system reboot.
If this functionality is required in your environment, you can invoke Podman from a systemd unit file, or create an init script for whichever init system is in use.

9
docs/source/markdown/podman-run.1.md
View File

@ -682,11 +682,10 @@ Restart policy will not take effect if a container is stopped via the **podman k
Valid _policy_ values are:
- **no**: Do not restart containers on exit;
- **on-failure**[:*max_retries*]: Restart containers when they exit
with a non-zero exit code, retrying indefinitely or until the optional
*max_retries* count is hit;
- **always**: Restart containers when they exit, regardless of status, retrying indefinitely.
- `no` : Do not restart containers on exit
- `on-failure[:max_retries]` : Restart containers when they exit with a non-zero exit code, retrying indefinitely or until the optional *max_retries* count is hit
- `always` : Restart containers when they exit, regardless of status, retrying indefinitely
- `unless-stopped` : Identical to **always**
Please note that restart will not restart containers after a system reboot.
If this functionality is required in your environment, you can invoke Podman from a **systemd.unit**(5) file, or create an init script for whichever init system is in use.