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CKAWorkloads & SchedulingSingle nodeEasy

Job with completions and parallelism

Scenario cka-wkl-007 · about 5 minutes · 4 points · 6 grader checks

Run a batch Job that must complete a fixed number of times with limited parallelism.

  • job
  • batch
  • completions
  • parallelism
  • workloads

What you will practise

  • Create a Job with a custom command
  • Set completions and parallelism
  • Verify Job success

Start this lab

With the CLI installed and signed in, this command provisions a single node cluster on your Mac, applies the scenario setup and prints the task below.

goldenkube start cka-wkl-007

Task

The task text exactly as the CLI shows it. Solve it on the cluster, then run goldenkube submit.

Create namespace "batch". In it, create a Job named "pi-job" using image busybox:1.36 that runs the command: sh -c 'echo done' The Job must have completions=3 and parallelism=2, and must finish with all 3 completions succeeded.

Requirements and details

Certification
CKA · Certified Kubernetes Administrator
Domain
Workloads & Scheduling
Difficulty
Easy
Cluster topology
Single node
Cluster features
None beyond the base cluster
Recommended time
5 minutes
Points
4
Grader checks
6
Kubernetes version
1.37
Minimum CLI version
0.1.0
Scenario version
1
Published

Grading runs locally: 6 state checks read your cluster when you submit; the scenario passes when every check passes. Hints, the reference solution and the check definitions are available only inside the CLI, not on this page.

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Taint, toleration and placement

Taint a worker node and run a Pod that tolerates the taint and is placed on that node.

Two nodes · ~7 min · 6 points

  • taint
  • toleration
  • scheduling
  • nodename

goldenkube start cka-sch-001

CKAWorkloads & SchedulingMedium

Spread replicas across nodes

Create a Deployment whose replicas are guaranteed to land on different nodes.

Three nodes · ~8 min · 6 points

  • scheduling
  • topology-spread
  • pod-anti-affinity
  • deployment

goldenkube start cka-sch-002

CKAWorkloads & SchedulingEasy

Rolling update of a Deployment

Update the image of a running Deployment with a rolling update and confirm all pods run the new image.

Single node · ~4 min · 4 points

  • deployment
  • rolling-update
  • rollout
  • workloads

goldenkube start cka-wkl-002

Independent community project, not affiliated with or endorsed by CNCF or The Linux Foundation. Lab results are practice feedback, not an exam score.