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cri: implement RuntimeConfig rpc

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The rpc only reports one field, i.e. the cgroup driver, to kubelet.
Containerd determines the effective cgroup driver by looking at all
runtime handlers, starting from the default runtime handler (the rest in
alphabetical order), and returning the cgroup driver setting of the
first runtime handler that supports one. If no runtime handler supports
cgroup driver (i.e. has a config option for it) containerd falls back to
auto-detection, returning systemd if systemd is running and cgroupfs
otherwise.

This patch implements the CRI server side of Kubernetes KEP-4033:
https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/4033-group-driver-detection-over-cri

Signed-off-by: Markus Lehtonen <markus.lehtonen@intel.com>
This commit is contained in:
Markus Lehtonen
2023-06-19 16:14:22 +03:00
parent 850b2e1bf3
commit ed47d6ba76
80 changed files with 9669 additions and 0 deletions
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16
pkg/cri/instrument/instrumented_service.go
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@@ -621,3 +621,19 @@ func (in *instrumentedService) ListPodSandboxMetrics(ctx context.Context, r *run
res, err = in.c.ListPodSandboxMetrics(ctx, r)
return res, errdefs.ToGRPC(err)
}
func (in *instrumentedService) RuntimeConfig(ctx context.Context, r *runtime.RuntimeConfigRequest) (res *runtime.RuntimeConfigResponse, err error) {
if err := in.checkInitialized(); err != nil {
return nil, err
}
log.G(ctx).Tracef("RuntimeConfig")
defer func() {
if err != nil {
log.G(ctx).WithError(err).Error("RuntimeConfig failed")
} else {
log.G(ctx).Tracef("RuntimeConfig returns config %+v", res)
}
}()
res, err = in.c.RuntimeConfig(ctx, r)
return res, errdefs.ToGRPC(err)
}