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The biggest obstacle here was cleanup - we needed a way to remove
detached exec sessions after they exited, but there's no way to
tell if an exec session will be attached or detached when it's
created, and that's when we must add the exit command that would
do the removal. The solution was adding a delay to the exit
command (5 minutes), which gives sufficient time for attached
exec sessions to retrieve the exit code of the session after it
exits, but still guarantees that they will be removed, even for
detached sessions. This requires Conmon 2.0.17, which has the new
`--exit-delay` flag.
As part of the exit command rework, we can drop the hack we were
using to clean up exec sessions (remove them as part of inspect).
This is a lot cleaner, and I'm a lot happier about it.
Otherwise, this is just plumbing - we need a bindings call for
detached exec, and that needed to be added to the tunnel mode
backend for entities.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Jhon is working on an alternative version that will combine
container and exec session resize, so we'll wait for that.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Oops. Misread the docs when I initially implemented this. Nice
and easy fix, at least.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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The usual flow for exec is going to be:
- Create exec session
- Start and attach to exec session
- Exec session exits, attach session terminates
- Client does an exec inspect to pick up exit code
The safest point to remove the exec session, without doing any
database changes to track stale sessions, is to remove during the
last part of this - the single inspect after the exec session
exits.
This is definitely different from Docker (which would retain the
exec session for up to 10 minutes after it exits, where we will
immediately discard) but should be close enough to be not
noticeable in regular usage.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Signed-off-by: Matthew Heon <mheon@redhat.com>
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This is still very early not not well tested, and missing resize
capability, but it does provide the first bits of exec.
Signed-off-by: Matthew Heon <mheon@redhat.com>
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Also adds some basic tests for these two. More tests are needed
but will have to wait for state to be finished.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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Start and Resize require further implementation work.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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