Support of multi node type in IBM Cloud Private Cluster

Question

IBM Cloud Private supports multi node type, x, p, x in the same cluster, what should we define in the helm deployment in order to make sure a deployment goes to a particular node type?

Answer 1

IBM Could Private supports mixed architectures on the worker nodes. For example, if you deploy an z application it will only try to run on z nodes. All the matter nodes should be one architecture, either x or p.

From ICP app center, you can create different charts for different platforms as following: app center

Answer 2

We found an issue to enable 'nodeSelector' to select different platforms to deploy. This issue was tracked in both ICP and Kubernetes community as below. ICP issue: https://github.ibm.com/IBMPrivateCloud/roadmap/issues/1737 Kubernetes Chart issue: https://github.com/kubernetes/charts/issues/1899

Answer 3

You can get the node information from Infrastructure-->Node.

Different platforms have different arch images, so we have to use nodeSelector to enable the pods to be scheduled to different nodes. We are now trying to enable multiarck docker images here https://github.com/docker-library/official-images , if this finished, then we will do not need nodeSelector anymore.

For the usage metric of different nodes in the cluster, you can get resource usage from the dashboard by default. If you install the add-on monitoring framework such as Prometheus etc on ICP, you will get more metrics.