k8s workshop

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Last Steps

We are nearing the end, but lets deploy a version that is ready to be served in our cluster. v2 this should be safe to deploy.

Deploy a stable version

  1. Change the image in the fronted.yml to v2.
  2. Apply the changes and watch for pod changes: 
    kubectl apply -f k8s-files/ && kubectl get pods -w
  3. You should now see the new pods starting and the old pods shuting down: 
    NAME                                   READY     STATUS              RESTARTS   AGE
calculator-frontend-58968fd9b8-22np7   0/1       ContainerCreating   0          1s
calculator-frontend-65876567ff-68p8s   1/1       Running             0          2m
calculator-frontend-65876567ff-rvpvb   1/1       Running             0          34s
calculator-frontend-65876567ff-wj62x   1/1       Running             0          46s
calculator-frontend-58968fd9b8-22np7   0/1       Running             0          4s
calculator-frontend-58968fd9b8-22np7   1/1       Running             0          6s
calculator-frontend-65876567ff-rvpvb   1/1       Terminating         0          39s
calculator-frontend-58968fd9b8-sfmhv   0/1       Pending             0          0s
calculator-frontend-58968fd9b8-sfmhv   0/1       Pending             0          0s
calculator-frontend-58968fd9b8-sfmhv   0/1       ContainerCreating   0          0s
calculator-frontend-65876567ff-rvpvb   0/1       Terminating         0          40s
calculator-frontend-58968fd9b8-sfmhv   0/1       Running             0          5s
calculator-frontend-65876567ff-rvpvb   0/1       Terminating         0          44s
calculator-frontend-65876567ff-rvpvb   0/1       Terminating         0          44s
calculator-frontend-58968fd9b8-sfmhv   1/1       Running             0          9s
calculator-frontend-65876567ff-wj62x   1/1       Terminating         0          1m
calculator-frontend-58968fd9b8-w48gr   0/1       Pending             0          0s
calculator-frontend-58968fd9b8-w48gr   0/1       Pending             0          0s
calculator-frontend-58968fd9b8-w48gr   0/1       ContainerCreating   0          0s
calculator-frontend-65876567ff-wj62x   0/1       Terminating         0          1m
calculator-frontend-58968fd9b8-w48gr   0/1       Running             0          5s
calculator-frontend-65876567ff-wj62x   0/1       Terminating         0          1m
calculator-frontend-65876567ff-wj62x   0/1       Terminating         0          1m
calculator-frontend-58968fd9b8-w48gr   1/1       Running             0          8s
calculator-frontend-65876567ff-68p8s   1/1       Terminating         0          2m
calculator-frontend-65876567ff-68p8s   0/1       Terminating         0          2m
calculator-frontend-65876567ff-68p8s   0/1       Terminating         0          3m
calculator-frontend-65876567ff-68p8s   0/1       Terminating         0          3m
  4. The app should now be served in v2.

We did it! 🎉

You are now able to do the following things using Kubernetes:

  • Deploy an application
  • Inspect your application when something goes wrong
  • Configure multiple replicas for fault tolerance
  • Create a service for load balancing
  • Expose an application to the public internet
  • Update applications without any downtime

Want to learn more?

Have a look at the new version of the frontend. It looks like history does not work correctly. 😉

We need to fix this! Try the bonus chapters.