I am using a Kubernetes cluster version 1.10.4. I want to update it to 1.12 but first, I need to update it to 1.11 how it is possible?
I read this FAQ: https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade-1-11/
But it did not work. Steps try to update immediately to 1.12 and that ending with an error. :(
Help!
Reproduced your issue by installing v.1.10.4 version and trying to upgrade it to v.1.11.0 using https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade-1-11/ FAQ.
The same error and attempt to upgrade to 1.12.1 instead of 1.11.0
[upgrade/config] FATAL: invalid configuration: kind and apiVersion is mandatory information that needs to be specified in all YAML documents
This is happening because you pass v1.12.1 to $VERSION while using below command:
export VERSION=$(curl -sSL https://dl.k8s.io/release/stable.txt)
root@kube-update-11:~# echo $VERSIONv1.12.1
What you should do is manually set proper version:
export VERSION=v1.11.0
export ARCH=amd64
curl -sSL https://dl.k8s.io/release/${VERSION}/bin/linux/${ARCH}/kubeadm > /usr/bin/kubeadm
chmod a+rx /usr/bin/kubeadmAnd try again
root@kube-update-11:~# kubeadm upgrade plan[preflight] Running pre-flight checks.
[upgrade] Making sure the cluster is healthy:
[upgrade/config] Making sure the configuration is correct:
[upgrade/config] Reading configuration from the cluster...
[upgrade/config] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml'
I1022 12:07:11.188895 20089 feature_gate.go:230] feature gates: &{map[]}
[upgrade] Fetching available versions to upgrade to
[upgrade/versions] Cluster version: v1.10.4
[upgrade/versions] kubeadm version: v1.11.0
[upgrade/versions] Latest stable version: v1.12.1
[upgrade/versions] Latest version in the v1.10 series: v1.10.9
root@kube-update-11:~# kubeadm upgrade apply v1.11.0[preflight] Running pre-flight checks.
[upgrade] Making sure the cluster is healthy:
[upgrade/config] Making sure the configuration is correct:
...
[upgrade/version] You have chosen to change the cluster version to "v1.11.0"
[upgrade/versions] Cluster version: v1.10.4
[upgrade/versions] kubeadm version: v1.11.0
...
[upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.11.0". Enjoy!
[upgrade/kubelet] Now that your control plane is upgraded, please proceed with upgrading your kubelets if you haven't already done so.