CNI networks: reload networks if needed #11846
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The current implementation of the CNI network interface only loads the networks on the first call and saves them in a map. This is done to safe performance and not having to reload all configs every time which will be costly for many networks. The problem with this approach is that if a network is created by another process it will not be picked up by the already running podman process. This is not a problem for the short lived podman commands but it is problematic for the podman service. To make sure we always have the actual networks store the mtime of the config directory. If it changed since the last read we have to read again. Fixes containers#11828 Signed-off-by: Paul Holzinger <[email protected]>
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LGTM |
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What this PR does / why we need it:
The current implementation of the CNI network interface only loads the
networks on the first call and saves them in a map. This is done to safe
performance and not having to reload all configs every time which will be
costly for many networks.
The problem with this approach is that if a network is created by
another process it will not be picked up by the already running podman
process. This is not a problem for the short lived podman commands but
it is problematic for the podman service.
To make sure we always have the actual networks store the mtime of the
config directory. If it changed since the last read we have to read
again.
How to verify it
start the podman service, list the networks via api, create a network via podman network create, list the networks via api again
Which issue(s) this PR fixes:
Fixes #11828
Special notes for your reviewer: