Provide instructions about how to upgrade k8s to newer version about terraform-kubernetes-installer HOT 2 CLOSED

One way to upgrade your cluster is by incrementally changing the value of the k8s_ver input variable on your master and then worker nodes.

For example, the command terraform apply -var k8s_ver=1.7.5 -target=module.instances-k8sworker-ad1 would (1) drain all worker nodes in AD1 to your nodes in AD2 and AD3 (2) then destroy all worker nodes in AD1, (3) re-create worker nodes in AD1 using Kubernetes 1.7.5, and finally (4) have them re-join the cluster.

If you have more than one worker in an AD, you can upgrade worker nodes individually using the subscript operator e.g. terraform plan -var k8s_ver=1.7.5 -target=module.instances-k8smaster-ad1.oci_core_instance.TFInstanceK8sMaster[1]

Depending on your tolerance for failure, I would smoke test this approach on a stand-by cluster to weed out pitfalls and ensure our scripts are compatible with the version of Kubernetes you are trying to use - we have also not tested other versions of Kubernetes other than the the default version (1.7.4).

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Hi jlamilan,
Do you have a recommaned proposal for the k8s upgrade? especially for master node.
Don't need formal document, just briefly describe the steps can help a lot.
Thanks!

from terraform-kubernetes-installer.