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Configuring Probes for a Kubernetes Pod

Kubernetes is a powerful tool when it comes to keeping your containers running. It can automatically manage the process of restarting containers when they fail, and it can also manage network traffic to ensure only healthy and running containers are used to serve incoming requests. One way to gain even more control over these kinds of automation is through the use of liveness and readiness probes. In this lab, you will have the opportunity to work with liveness and readiness probes by configuring them for a pod.

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Path Info

Level

Intermediate

Duration

15m

Published

Mar 31, 2019

Challenge

Create a Probe to Detect and Restart Unhealthy Containers

Edit the pod descriptor to add a liveness probe:

vi candy-service-pod.yml

apiVersion: v1
kind: Pod
metadata:
  name: candy-service
spec:
  containers:
  - name: candy-service
    image: linuxacademycontent/candy-service:2
    livenessProbe:
      httpGet:
        path: /healthz
        port: 8081

Challenge

Create a Probe to Detect When the Container is Ready to Service Requests

Create a readiness probe for the pod.

apiVersion: v1
kind: Pod
metadata:
  name: candy-service
spec:
  containers:
  - name: candy-service
    image: linuxacademycontent/candy-service:2
    livenessProbe:
      httpGet:
        path: /healthz
        port: 8081
    readinessProbe:
      httpGet:
        path: /
        port: 80

Create the pod in the cluster:

kubectl apply -f candy-service-pod.yml

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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