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Merge pull request #10134 from rhatdan/conmon

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[CI:DOCS] Add more documentation on conmon
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docs/source/markdown/podman-run.1.md
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@ -1769,6 +1769,20 @@ $ podman run --env ENV*****=b alpine printenv ENV*****
b
```
## CONMON
When Podman starts a container it actually executes the conmon program, which
then executes the OCI Runtime. Conmon is the container monitor. It is a small
program whose job is to watch the primary process of the container, and if the
container dies, save the exit code. It also holds open the tty of the
container, so that it can be attached to later. This is what allows Podman to
run in detached mode (backgrounded), so Podman can exit but conmon continues to
run. Each container has their own instance of conmon. Conmon waits for the
container to exit, gathers and saves the exit code, and then launches a Podman
process to complete the container cleanup, by shutting down the network and
storage. For more information on conmon, please reference the conmon(8) man
page.
## FILES
**/etc/subuid**
@ -1779,7 +1793,7 @@ NOTE: Use the environment variable `TMPDIR` to change the temporary storage loca
## SEE ALSO
**podman**(1), **podman-save**(1), **podman-ps**(1), **podman-attach**(1), **podman-pod-create**(1), **podman-port**(1), **podman-start**(1), **podman-kill**(1), **podman-stop**(1),
**podman-generate-systemd**(1) **podman-rm**(1), **subgid**(5), **subuid**(5), **containers.conf**(5), **systemd.unit**(5), **setsebool**(8), **slirp4netns**(1), **fuse-overlayfs**(1), **proc**(5)**.
**podman-generate-systemd**(1) **podman-rm**(1), **subgid**(5), **subuid**(5), **containers.conf**(5), **systemd.unit**(5), **setsebool**(8), **slirp4netns**(1), **fuse-overlayfs**(1), **proc**(5), **conmon**(8).
## HISTORY
September 2018, updated by Kunal Kushwaha `<kushwaha_kunal_v7@lab.ntt.co.jp>`