Stateless Application Using a Deployment

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A version of the Kubernetes Stateless Application Deployment example that uses Pulumi. This example deploys a replicated Nginx server to a Kubernetes cluster, using TypeScript 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.

Pre-Requisites

  1. Install Pulumi
  2. Configure Kubernetes for Pulumi

Running the App

After cloning this repo, cd into this directory and install dependencies:

npm install

Afterwards, create a new stack, a logical deployment target that we’ll deploy into:

$ pulumi stack init
Enter a stack name: k8s-nginx-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
Updating stack 'k8s-nginx-dev'
Performing changes:

     Type                           Name                     Status      Info
 +   pulumi:pulumi:Stack            k8s-nginx-k8s-nginx-dev  created
 +   └─ kubernetes:apps:Deployment  nginx                    created

info: 2 changes performed:
    + 2 resources created
Update duration: 18.291517072s

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 up:

$ pulumi config set replicas 5
$ pulumi up
Updating stack 'k8s-nginx-dev'
Performing changes:

     Type                           Name                     Status      Info
 *   pulumi:pulumi:Stack            k8s-nginx-k8s-nginx-dev  done
 ~   └─ kubernetes:apps:Deployment  nginx                    updated     changes: ~ spec

info: 1 change performed:
    ~ 1 resource updated
      1 resource unchanged
Update duration: 4.324849549s

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