Currently kubeadm produces an error upon parsing multiple
certificates stored in the cluster-info configmap. Yet it
should check all available certificates in a scenario like
CA key rotation.
Check all available CA certs against pinned certificate hashes.
Fixes https://github.com/kubernetes/kubeadm/issues/1399
In the case where newControlPlane is true we don't go through
getNodeRegistration() and initcfg.NodeRegistration.CRISocket is empty.
This forces DetectCRISocket() to be called later on, and if there is more than
one CRI installed on the system, it will error out, while asking for the user
to provide an override for the CRI socket. Even if the user provides an
override, the call to DetectCRISocket() can happen too early and thus ignore it
(while still erroring out).
However, if newControlPlane == true, initcfg.NodeRegistration is not used at
all and it's overwritten later on.
Thus it's necessary to supply some default value, that will avoid the call to
DetectCRISocket() and as initcfg.NodeRegistration is discarded, setting
whatever value here is harmless.
Signed-off-by: Rostislav M. Georgiev <rostislavg@vmware.com>
Windows worker nodes run kube-proxy as a Windows service.
In the future the kube-proxy DaemonSet might run on Windows nodes
too, but for now a temporary measure is needed to disable it.
Add a linux node selector in the kube-proxy manifest spec.
We have an existing helper function for this: runtime.SerializerInfoForMediaType()
This is common prep-work for encoding runtime.Objects into JSON/YAML for transmission over the wire or writing to ComponentConfigs.
If the k8s version argument passed to "upgrade plan" is missing
the logic should perform the following actions:
- fetch a "stable" version from the internet.
- if that fails, fallback to the local client version.
Currentely the logic fails because the cfg.KubernetesVersion is
defaulted to the version of the existing cluster, which
then causes an early exit without any ugprade suggestions.
See app/cmd/upgrade/common.go::enforceRequirements():
configutil.FetchInitConfigurationFromCluster(..)
Fix that by passing the explicit user value that can also be "".
This will then make the "offline getter" treat it as an explicit
desired upgrade target.
In the future it might be best to invert this logic:
- if no user k8s version argument is passed - default to the kubeadm
version.
- if labels are passed (e.g. "stable"), fetch a version from the
internet.
