Added volume driver selection for postgres, and the possibility to choose hosts by label, and a little bit of cleanup

templates/postgres/1/docker-compose.yml

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+version: '2'
+services:
+  postgres-lb:
+    image: rancher/lb-service-haproxy
+    ports:
+      - ${lb_port}
+    {{- if ne .Values.host_label ""}}
+    labels:
+      io.rancher.scheduler.affinity:host_label: ${host_label}
+    {{- end}}
+
+  postgres-data:
+    image: busybox
+    labels:
+      io.rancher.container.start_once: true
+    {{- if ne .Values.host_label ""}}
+      io.rancher.scheduler.affinity:host_label: ${host_label}
+    {{- end}}
+    volumes:
+      - pgdata:/var/lib/postgresql/data/pgdata
+
+  postgres:
+    image: postgres:latest
+    environment:
+      PGDATA: /var/lib/postgresql/data/pgdata
+      POSTGRES_DB: ${postgres_db}
+      POSTGRES_USER: ${postgres_user}
+      POSTGRES_PASSWORD: ${postgres_password}
+    tty: true
+    stdin_open: true
+    labels:
+      io.rancher.sidekicks: postgres-data
+    {{- if ne .Values.host_label ""}}
+      io.rancher.scheduler.affinity:host_label: ${host_label}
+    {{- end}}
+    volumes_from:
+      - postgres-data
+volumes:
+  pgdata:
+    driver: ${VOLUME_DRIVER}
+    per_container: true

templates/postgres/1/rancher-compose.yml

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+version: '2'
+catalog:
+  name: "Postgres"
+  version: "v0.0.2"
+  description: "PostgreSQL"
+  uuid: postgres-0
+  minimum_rancher_version: v0.9.0
+  questions:
+    - variable: lb_port
+      description: "Port to access PostgreSQL from external services"
+      label: "Postgres LB Port"
+      required: true
+      default: 5432
+      type: "int"
+    - variable: postgres_db
+      description: "Postgres Database"
+      label: "Postgres Database"
+      required: true
+      default: "postgres_sb"
+      type: "string"
+    - variable: postgres_user
+      description: "Postgres User"
+      label: "Postgres User"
+      required: true
+      default: "postgres_user"
+      type: "string"
+    - variable: postgres_password
+      description: "Postgres Password"
+      label: "Postgres Password"
+      required: true
+      default: "postgres_password"
+      type: "string"
+    - variable: "VOLUME_DRIVER"
+      description: "The VOLUME driver to associate with this server"
+      label: "VOLUME Driver"
+      required: true
+      default: "local"
+      type: enum
+      options: # List of options if using type of `enum`
+        - local
+        - rancher-nfs
+        - rancher-efs
+        - rancher-ebs
+    - variable: host_label
+      label: "Host with Label to put postgres on"
+      description: |
+        Host label to use as postgres 'value' tag.
+        Example: 'postgres=true'
+      required: false
+      default: ""
+      type: "string"
+
+services:
+  postgres-lb:
+    scale: 1
+    lb_config:
+      certs: []
+      port_rules:
+      - protocol: tcp
+        service: postgres
+        source_port: ${lb_port}
+        target_port: 5432
+    health_check:
+      port: 42
+      interval: 2000
+      unhealthy_threshold: 3
+      healthy_threshold: 2
+      response_timeout: 2000
+  postgres:
+    scale: 1
+    health_check:
+      port: 5432
+      interval: 2000
+      unhealthy_threshold: 3
+      healthy_threshold: 2
+      response_timeout: 2000