Stateless Application Using a Deployment
A version of the Kubernetes Stateless Application Deployment example that uses Pulumi. This example deploys a replicated Nginx server to a Kubernetes cluster, using Python and no YAML.
There is an interactive Tutorial available for this example. If this is your first time using Pulumi for Kubernetes, we recommend starting there.
Running the App
After cloning this repo,
cd into this directory and install dependencies:
$ python3 -m venv venv $ source venv/bin/activate $ pip3 install -r requirements.txt
Afterwards, create a new stack, a logical deployment target that we’ll deploy into:
$ pulumi stack init dev
Now to perform the deployment, simply run
pulumi up. It will first show you a preview of what will take place.
After confirming, the deployment will take place in approximately 20 seconds:
$ pulumi up -y Previewing update (dev): Type Name Plan + pulumi:pulumi:Stack kubernetes-py-nginx-dev create + └─ kubernetes:apps:Deployment nginx-deployment create Resources: + 2 to create Do you want to perform this update? yes Updating (dev): Type Name Status + pulumi:pulumi:Stack kubernetes-py-nginx-dev created + └─ kubernetes:apps:Deployment nginx-deployment created Outputs: nginx: "nginx-deployment-ts0qpwi9" Resources: + 2 created Duration: 10s
This deployment is now running, and you can run commands like
kubectl get pods to see the application’s resources.
The stack’s replica count is configurable. By default, it will scale up to three instances, but we can easily change
that to five, by running the
pulumi config command followed by another
$ pulumi config set replicas 5 $ pulumi up -y Previewing update (dev): Type Name Plan Info pulumi:pulumi:Stack kubernetes-py-nginx-dev ~ └─ kubernetes:apps:Deployment nginx-deployment update [diff: ~spec] Resources: ~ 1 to update 1 unchanged Updating (dev): Type Name Status Info pulumi:pulumi:Stack kubernetes-py-nginx-dev ~ └─ kubernetes:apps:Deployment nginx-deployment updated [diff: ~spec] Outputs: nginx: "nginx-deployment-ts0qpwi9" Resources: ~ 1 updated 1 unchanged Duration: 15s
After we’re done, we can tear down all resources, including removing our stack, with a couple commands:
$ pulumi destroy --yes $ pulumi stack rm --yes