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The DevOps Toolkit Catalogue

Deploying New Releases Using the Canary Strategy

Explore the deployment of new application releases using the canary strategy with Argo Rollouts. Understand how to gradually shift traffic to new releases, monitor rollout status, and control progression with pauses and manual approvals for safer updates.

We'll cover the following...

Use Argo Rollouts

What we’ve done up to now is a bit boring. We haven’t yet seen any advantage to using Argo Rollouts. That’s about to change. We’ll deploy a second release, and that should kick off the canary deployment process.

Let’s go!

Shell
helm upgrade devops-toolkit helm \
    --namespace devops-toolkit \
    --reuse-values \
    --set image.tag=2.9.9

Watch the rollouts

We changed the tag of the image to 2.9.9 while reusing all the other values.

Let’s watch the rollout and see what’s going on.

Shell
kubectl argo rollouts \
    --namespace devops-toolkit \
    get rollout devops-toolkit-devops-toolkit \
    --watch

Output of the yaml file

The output is as follows.

YAML
Name:            devops-toolkit-devops-toolkit
Namespace:       devops-toolkit
Status:          ॥ Paused
Strategy:        Canary
  Step:          1/8
  SetWeight:     20
  ActualWeight:  20
Images:          vfarcic/devops-toolkit-series:2.6.2 (stable)
                 vfarcic/devops-toolkit-series:2.9.9 (canary)
Replicas:
  Desired:       2
  Current:       3
  Updated:       1
  Ready:         3
  Available:     3
NAME                                                       KIND        STATUS     AGE    INFO
⟳ devops-toolkit-devops-toolkit                            Rollout     ॥ Paused   2m56s  
├──# revision:2                                                                          
│  └──⧉ devops-toolkit-devops-toolkit-6785bfb67b           ReplicaSet  ✔ Healthy  36s    canary
│     └──□ devops-toolkit-devops-toolkit-6785bfb67b-zrzff  Pod         ✔ Running  36s    ready:1/1
└──# revision:1                                                                          
   └──⧉ devops-toolkit-devops-toolkit-849fcb5f44           ReplicaSet  ✔ Healthy  2m41s  stable
      ├──□ devops-toolkit-devops-toolkit-849fcb5f44-fgl5v  Pod         ✔ Running  2m41s  ready:1/1
      └──□ devops-toolkit-devops-toolkit-849fcb5f44-klcrh  Pod         ✔ Running  2m41s  ready:1/1

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