Now that we have a kubernetes cluster up and running on our local machine, we can now look at creating a deployment.yaml for our comments API.
The deployment.yml will effectively contain everything that Kubernetes needs to know in order to run our application within the cluster as a number of pods.
Let’s dive in and start defining this. We’ll start off by creating a new directly under which this configuration will live called config and then we’ll create a new deployment.yml file within this:
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: api.tutorialedge.net
spec:
replicas: 3
strategy:
type: RollingUpdate
rollingUpdate:
maxSurge: 1
maxUnavailable: 0
selector:
matchLabels:
name: api.tutorialedge.net
template:
metadata:
labels:
name: api.tutorialedge.net
spec:
containers:
- name: application
image: "forbsey/comments-api:latest"
imagePullPolicy: Always
ports:
- containerPort: 8080
env:
- name: DB_PORT
value: "$DB_PORT"
- name: DB_HOST
value: "$DB_HOST"
- name: DB_PASSWORD
value: "$DB_PASSWORD"
- name: DB_TABLE
value: "$DB_TABLE"
- name: DB_USERNAME
value: "$DB_USERNAME"