Automatic merge from submit-queue (batch tested with PRs 43465, 43529, 43474, 43521)
kubelet/cni: hook network plugin Status() up to CNI network discovery
Ensure that the plugin returns NotReady status until there is a
CNI network available which can be used to set up pods.
Fixes: https://github.com/kubernetes/kubernetes/issues/43014
I think the only reason it wasn't done like this in the first place was that the dynamic "reread /etc/cni/net.d every 10s forever" was added long after the Status() hook was. What do you think?
@freehan @caseydavenport @luxas @jbeda
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