22-Lab-Using-Runtimes-in-Kubernetes.md

Lab - Using Runtimes in Kubernetes

• Take me to the Lab

Solutions for Lab - Using Runtimes in Kubernetes:

• runc is the default runtime used by this cluster.

• Inspect the runtime classes in this cluster to answer the next questions

  Answer:
  OK
  

• runsc is the handler used by the runtime class called gvisor

  Run
  
  $ kubectl describe runtimeclasses gvisor  | grep Handler
  
  

• Kata-Containers runtimeclass object makes use of kata-runtime as the handler?

• To create a new runtime class, Run

  $ vi runtime.yaml
  
  use the following yaml file
  apiVersion: node.k8s.io/v1
  kind: RuntimeClass
  metadata:
    name: secure-runtime
  handler: runsc
  
  $ kubectl apply -f runtime.yaml
  

• A pod definition file is provided at /root/simple-webapp-1.yaml. Update this file with the runtime class that we just created in the previous step. runtimeClassName: secure-runtime

  $ vi /root/simple-webapp-1.yaml
  
  use the following yaml file
  
  apiVersion: v1
  kind: Pod
  metadata:
    name: simple-webapp-1
    labels:
      name: simple-webapp
  spec:
    runtimeClassName: secure-runtime
    containers:
      - name: simple-webapp
        image: kodekloud/webapp-delayed-start
        ports:
        - containerPort: 8080
  
  $ kubectl apply -f /root/simple-webapp-1.yaml