Create New Site Job (PostgreSQL)

Copy PostgreSQL secret into erpnext namespace

$ kubectl get secret postgresql -n postgresql -o yaml | \
    grep -v '^\s*namespace:\s' | \
      kubectl apply -n erpnext -f -

Create a file named add-example-site-job.yaml with following content.

apiVersion: batch/v1
kind: Job
metadata:
  name: create-new-site-${SITE_NAME}
spec:
  backoffLimit: 1
  template:
    spec:
      securityContext:
        supplementalGroups: [1000]
      containers:
      - name: create-site
        image: frappe/erpnext-worker:${VERSION}
        args: ["new"]
        imagePullPolicy: IfNotPresent
        volumeMounts:
          - name: sites-dir
            mountPath: /home/frappe/frappe-bench/sites
        env:
          - name: "POSTGRES_HOST"
            value: "postgresql.postgresql.svc.cluster.local"
          - name: "SITE_NAME"
            value: ${SITE_NAME}
          - name: "DB_ROOT_USER"
            value: postgres
          - name: "POSTGRES_PASSWORD"
            valueFrom:
              secretKeyRef:
                key: postgresql-password
                name: postgresql
          - name: "ADMIN_PASSWORD"
            value: ${ADMIN_PASSWORD}
      restartPolicy: Never
      volumes:
        - name: sites-dir
          persistentVolumeClaim:
            claimName: ${SITES_PVC}
            readOnly: false

Change the following properties:

• metadata.name: unique name for site creation job. e.g. create-erp-example-com
• spec.template.spec.containers[?(@.name==create-site)].image: Image to create new site. Find it using following command

  $ kubectl get deployments.apps -n <namespace> <helm-release-name>-erpnext-erpnext -o jsonpath="{.spec.template.spec.containers[0].image}"
  

• spec.template.spec.containers[?(@.name==create-site)].env[?(@.name==SITE_NAME)].value: Site name to create, e.g. erp.example.com this has to resolve to LoadBalancer External IP
• spec.template.spec.containers[?(@.name==create-site)].env[?(@.name==ADMIN_PASSWORD)].value: Set password for site Administrator
• spec.template.spec.volumes[0].persistentVolumeClaim.claimName: PVC where sites are located

Create the resource:

$ kubectl create -n <namespace> -f add-example-site-job.yaml

Health check

Setup helm release with health check for connection to PostgreSQL as secondary database. It will ensure PostgreSQL connection is alive for connected workers and scheduler pods. Execute helm install or helm upgrade command.

Example:

$ helm install <release-name> --namespace <namespace> frappe/erpnext \
    --set mariadbHost=mariadb.mariadb.svc.cluster.local \
    --set persistence.worker.storageClass=<storageClass> \
    --set persistence.logs.storageClass=<storageClass> \
    --set postgresHost=postgresql.postgresql.svc.cluster.local \
    --set postgresPort=5432