For whatever reason calling os.Stat() on the readiness indicator file
from CmdAdd()/CmdDel() when multus is running in server mode and is
containerized often returns "file not found", which triggers the
polling behavior of GetReadinessIndicatorFile(). This greatly delays
CNI operations that should be pretty quick. Even if an exponential
backoff is used, os.Stat() can still return "file not found"
multiple times, even though the file clearly exists.
But it turns out we don't need to check the readiness file in server
mode when running with MultusConfigFile == "auto". In this mode the
server starts the ConfigManager which (a) waits until the file exists
and (b) fsnotify watches the readiness and (c) exits the daemon
immediately if the file is deleted or moved.
This means we can assume that while the daemon is running and the
server is handling CNI requests that the readiness file exists;
otherwise the daemon would have exited. Thus CmdAdd/CmdDel don't
need to run a lot of possibly failing os.Stat() calls in the CNI
hot paths.
Signed-off-by: Dan Williams <dcbw@redhat.com>
Move server start code to a common function that both regular
and test code can use. Also shut down the server from the
testcases.
Signed-off-by: Dan Williams <dcbw@redhat.com>
* config, daemon: shim socket path is not needed
The shim socket dir attribute is only required for the shim (cni
configuration). Thus, it can be removed from the daemon configuration.
Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.com>
* config, daemon: rename socket dir attribute
Now the socketDir parameter no longer stutters.
Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.com>
* docs, thick plugin: align docs with new configuration reference
PR #1053 - [0] - changed the thick plugin configuration to happen
exclusively via the user provided config map. This PR aligns the multus
documentation with the existing code.
[0] - https://github.com/k8snetworkplumbingwg/multus-cni/pull/1053
Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.com>
---------
Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.com>
* Draft for refine options
* config: remove command line args; use configMap/JSON config
The `socketDir` configuration was split in two, since the multus daemon,
and multus shim have the socket in different paths. This allows the user
to customize these paths.
Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.com>
* deployment, ci: update daemonset spec
Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.com>
---------
Signed-off-by: Miguel Duarte Barroso <mdbarroso@redhat.com>
Co-authored-by: Tomofumi Hayashi <tohayash@redhat.com>
Co-authored-by: dougbtv <dosmith@redhat.com>
This change fix license boilerplate and its copyright.
The updated year in copyright is based on the file creation date.
If older than 2021, added copyright is transfered to multus
authors from Intel corporation as the multus code was officially
transfered to Kubernetes Networking Plumbing Working Group on
March 11, 2021.
This changes introduce delegate API function in multus-daemon.
This API will be consumed from other programs for hot-plug
interface into running pod. This change also cleanups server
code to split into client code and server code to easy to import
from other golang code.
This change make binary file and directory name consistent.
In addition, change the package name cni to server because cni
is a bit umbiguous for cni plugin's repository.
