Resize kubernetes cluster with a different machine type?

Question

I want to add a new node in existing kubernetes cluster, but with a different machine type. For the new node I will add label for it so that only some application will run on it.

I tried the following command

gcloud compute instance-groups managed resize CONTAINER_GROUP --zone ZONE --size 5 --machine-type n1-standard-8

And it returns an error

ERROR: (gcloud.compute.instance-groups.managed.resize) unrecognized arguments: --machine-type n1-standard-8

How can I add a new node into existing kubernetes cluster with a different machine type?

Solution 1

You can work around the single machine-type restriction by creating a new instance group with a (modified) copy of GKE's instance template. See this answer for more details. Note that later you may need to manually upgrade that instance group (instead of using GKE's Node Upgrade API).

Solution 2

• Create a new node pool with a custom machine type, disk-size, num-nodes and with any other required parameters.
• All steps are at Google Container Engine GKE node pools.

Comments

[Robert Bailey]

This question was previously answered on Stack Overflow.

[Mr.Wang from Next Door]

But the doc says I can change the machine type of a stopped node. I tried that and it says ERROR: (gcloud.compute.instances.set-machine-type) Some requests did not succeed: - The resource 'xxxx' is not ready. So Google disabled that?

[Mr.Wang from Next Door]

So if I want to upgrade the machine type, I need create a new cluster? Seems unreasonable for production environment since that would lead to downtime

[DoiT International]

@user325320 - unfortunately, this is the situation today.

[Federico Fissore]

Followed that guide and successfully started migrating pods from one old node to the newer one