Kubernetes storage class

Appsmith uses persistent storage in Kubernetes to store MongoDB data and repos for git-connected applications. The MongoDB data includes users, workspaces, and applications. Appsmith can use a custom MongoDB as well. However, for git-repos, it needs access to the filesystem.

Here is an example of how Appsmith uses the persistent storage in Kubernetes to store MongoDB data:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: appsmith-mongodb
spec:
  selector:
    matchLabels:
      app: appsmith-mongodb
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: appsmith-mongodb
    spec:
      volumes:
        - name: mongo-data
          persistentVolumeClaim:
            claimName: mongo-data
      containers:
        - name: appsmith-mongodb
          image: mongo:4
          volumeMounts:
            - name: mongo-data
              mountPath: /data/db

As you can see from the example, a persistent volume claim is created for the MongoDB data. The deployment specifies that the MongoDB container mounts the persistent volume claim and uses it to store its data.

Overall, Appsmith uses persistent storage in Kubernetes to store important data that needs to persist between container restarts. This ensures that the application data is not lost and can be accessed by the application whenever needed.