5. Production-Ready Kubernetes Clusters

Activity 5: Minimizing the Costs of Serverless Functions in a GKE Cluster

Solution

1. Create a new node pool with preemptible servers.

   Run the following and upcoming functions in your GCP cloud shell:

   gcloud beta container node-pools create preemptible --preemptible \
   --min-nodes 1 --max-nodes 10  --enable-autoscaling  \
   --cluster serverless --zone us-central1-a 

   Note

   Change the zone parameter if your cluster is running in another zone.

   This function creates a new node pool named preemptible with an automatically scaled minimum of 1 node and a maximum of 10 nodes, as shown in the following figure:

   Figure 5.29: Node pool creation

2. Taint the preemptible servers to run only serverless functions:

   kubectl taint node -l cloud.google.com/gke-nodepool=preemptible   \
   preemptible="true":NoSchedule

   This command will apply taints to all nodes with the label cloud.google.com/node-pool = preemptible. The taint...