Lab Information
The Nautilus DevOps team is crafting jobs in the Kubernetes cluster. While they're developing actual scripts/commands, they're currently setting up templates and testing jobs with dummy commands. Please create a job template as per details given below:
Create a job named countdown-xfusion.
The spec template should be named countdown-xfusion (under metadata), and the container should be named container-countdown-xfusion
Utilize image debian with latest tag (ensure to specify as debian:latest), and set the restart policy to Never.
Execute the command sleep 5
Note: The kubectl utility on jump_host is set up to operate with the Kubernetes cluster.
Lab Solutions
Step 1: Create the YAML configuration file
Let's create a YAML file for the job:
cat > countdown-xfusion-job.yaml <<EOF
apiVersion: batch/v1
kind: Job
metadata:
name: countdown-xfusion
spec:
template:
metadata:
name: countdown-xfusion
spec:
containers:
- name: container-countdown-xfusion
image: debian:latest
command: ["sleep", "5"]
restartPolicy: Never
EOF
Explanation of what we created:
apiVersion: batch/v1 - Uses the batch API for jobs
kind: Job - Specifies this is a Job resource
name: countdown-xfusion - Job name as required
template.metadata.name: countdown-xfusion - Spec template name as required
name: container-countdown-xfusion - Container name as required
image: debian:latest - Uses debian:latest image
command: ["sleep", "5"] - Executes sleep 5 command
restartPolicy: Never - Sets the restart policy to Never
Step 2: Apply the YAML file to create the job
Now, let's create the job in the Kubernetes cluster:
kubectl apply -f countdown-xfusion-job.yaml
Step 3: Verify the job was created
Check that the job exists:
kubectl get job countdown-xfusion
Step 4: Monitor the job execution
Wait a few seconds for the job to complete (it should take about 5 seconds for the sleep command), then check again:
kubectl get job countdown-xfusion
Step 5: Check the pod created by the job
List the pods to see the one created by our job:
kubectl get pods
Step 6: Verify the pod details
Let's check the pod details to confirm all specifications:
kubectl describe pod countdown-xfusion-s52nf
Step 7: Check the job details (optional)
For more detailed information about the job:
kubectl describe job countdown-xfusion
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