Canary deployments in Kubernetes - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a canary deployment?

A canary deployment is a way to release a new version of software to a small group of users first. It helps check if the new version works well before giving it to everyone.

beginner

Why use canary deployments in Kubernetes?

Canary deployments let you test new app versions safely by sending only some traffic to the new version. This reduces risk and helps catch problems early.

intermediate

How do you control traffic split in a canary deployment?

You control traffic split by adjusting the number of pods or using service routing rules to send a percentage of user requests to the new version.

intermediate

What Kubernetes resource can help manage canary deployments?

Tools like Kubernetes Deployments with multiple ReplicaSets or service mesh tools (e.g., Istio) help manage canary deployments by controlling traffic and rollout.

beginner

What is the main benefit of canary deployments?

The main benefit is reducing risk by testing new versions with a small user group before full release, allowing quick rollback if issues appear.

What does a canary deployment primarily help with?

A Backing up data automatically

B Increasing the number of servers instantly

C Encrypting network traffic

D Reducing risk by testing new versions with limited users

Canary deployments reduce risk by releasing new versions to a small group first.

In Kubernetes, how can you send only some traffic to a new version during a canary deployment?

A By adjusting pod replicas or using service routing rules

B By deleting old pods immediately

C By changing the container image tag only

D By restarting the cluster

Traffic split is controlled by pod replicas or routing rules.

Which tool can help manage traffic routing for canary deployments in Kubernetes?

A Docker Compose

B Istio

C Git

D Jenkins

Istio is a service mesh that manages traffic routing for canary deployments.

What should you do if the canary version shows problems?

A Increase traffic to the canary immediately

B Delete all pods

C Rollback to the previous stable version

D Ignore and continue

Rollback helps avoid impacting all users if the new version has issues.

Canary deployments are an example of which type of deployment strategy?

A Incremental rollout

B Blue-green deployment

C Recreate deployment

D Shadow deployment

Canary deployments roll out changes incrementally to a subset of users.

Explain what a canary deployment is and why it is useful in Kubernetes.

Think about testing new versions safely before full release.

Describe how you would implement a canary deployment in Kubernetes.

Consider how to split traffic and manage versions.