[1.2.x] Set system namespace with the environment variable "SYSTEM_NAMESPACE"

[renuka-fernando]

Purpose

Set system namespace with the environment variable: SYSTEM_NAMESPACE
Add new package config for global configs

Tests

• Tested scenario 2 with SYSTEM_NAMESPACE = foo-sys namespace
• Tested scenario 6 without defining SYSTEM_NAMESPACE variable

Approach

Get SYSTEM_NAMESPACE from environment variable and set it to config.SystemNamespace global variable with enabling to all other packages to access it.

Change SYSTEM_NAMESPACE in operator.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: api-operator
  namespace: wso2-system
spec:
  replicas: 1
  selector:
    matchLabels:
      name: api-operator
  template:
    metadata:
      labels:
        name: api-operator
    spec:
      serviceAccountName: api-operator
      containers:
        - name: api-operator
          # Replace this with the built image name
          image: wso2/k8s-api-operator:1.2.2
          command:
            - api-operator
          imagePullPolicy: Always
          env:
            - name: WATCH_NAMESPACE
              value: ""
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: OPERATOR_NAME
              value: "api-operator"
            - name: SYSTEM_NAMESPACE
              value: "wso2-system"

Related Issues

#443