docs: frappe docker support for PostgreSQL

development/README.md

@@ -104,6 +104,23 @@ This will create a new site and a `mysite.localhost` directory under `frappe-ben
 The option `--no-mariadb-socket` will configure site's database credentials to work with docker.
 You may need to configure your system /etc/hosts if you're on Linux, Mac, or its Windows equivalent.
 
+To setup site with PostgreSQL as database use option `--db-type postgres` and `--db-host postgresql`. (Available only v12 onwards, currently NOT available for ERPNext).
+
+Example:
+
+```shell
+bench new-site mypgsql.localhost --db-type postgres --db-host postgresql
+```
+
+To avoid entering postgresql username and root password, set it in `common_site_config.json`,
+
+```shell
+bench config set-common-config -c root_login postgres
+bench config set-common-config -c root_password '"123"'
+```
+
+Note: If PostgreSQL is not required, the postgresql service / container can be stopped.
+
 ### Set bench developer mode on the new site
 
 To develop a new app, the last step will be setting the site into developer mode. Documentation is available at [this link](https://frappe.io/docs/user/en/guides/app-development/how-enable-developer-mode-in-frappe).

docs/site-operations.md

@@ -12,10 +12,12 @@ Or specify environment variables instead of passing secrets as command arguments
 
 Note:
 
-- Wait for the MariaDB service to start before trying to create a new site.
+- Wait for the database service to start before trying to create a new site.
     - If new site creation fails, retry after the MariaDB container is up and running.
     - If you're using a managed database instance, make sure that the database is running before setting up a new site.
 
+#### MariaDB Site
+
 ```sh
 # Create ERPNext site
 docker run \
@@ -29,10 +31,28 @@ docker run \
     frappe/erpnext-worker:$VERSION new
 ```
 
+#### PostgreSQL Site
+
+PostgreSQL is only available v12 onwards. It is NOT available for ERPNext.
+It is available as part of `frappe/erpnext-worker`. It inherits from `frappe/frappe-worker`.
+
+```sh
+# Create ERPNext site
+docker run \
+    -e "SITE_NAME=$SITE_NAME" \
+    -e "DB_ROOT_USER=$DB_ROOT_USER" \
+    -e "POSTGRES_HOST=$POSTGRES_HOST" \
+    -e "POSTGRES_PASSWORD=$POSTGRES_PASSWORD" \
+    -e "ADMIN_PASSWORD=$ADMIN_PASSWORD" \
+    -v <project-name>_sites-vol:/home/frappe/frappe-bench/sites \
+    --network <project-name>_default \
+    frappe/erpnext-worker:$VERSION new
+```
+
 Environment Variables needed:
 
 - `SITE_NAME`: name of the new site to create. Site name is domain name that resolves. e.g. `erp.example.com` or `erp.localhost`.
-- `DB_ROOT_USER`: MariaDB Root user.
+- `DB_ROOT_USER`: MariaDB/PostgreSQL Root user.
 - `MYSQL_ROOT_PASSWORD`: In case of the MariaDB docker container use the one set in `MYSQL_ROOT_PASSWORD` in previous steps. In case of a managed database use the appropriate password.
 - `MYSQL_ROOT_PASSWORD_FILE` - When the MariaDB root password is stored using docker secrets.
 - `ADMIN_PASSWORD`: set the administrator password for the new site.
@@ -40,6 +60,16 @@ Environment Variables needed:
 - `INSTALL_APPS=erpnext`: available only in erpnext-worker and erpnext containers (or other containers with custom apps). Installs ERPNext (and/or the specified apps, comma-delinieated) on this new site.
 - `FORCE=1`: optional variable which force installation of the same site.
 
+Environment Variables for PostgreSQL only:
+
+- `POSTGRES_HOST`: host for PostgreSQL server
+- `POSTGRES_PASSWORD`: Password for `postgres`. The database root user.
+
+Notes:
+
+- To setup existing frappe-bench deployment with default database as PostgreSQL edit the common_site_config.json and set `db_host` to PostgreSQL hostname and `db_port` to PostgreSQL port.
+- To create new frappe-bench deployment with default database as PostgreSQL use `POSTGRES_HOST` and `DB_PORT` environment variables in `erpnext-python` service instead of `MARIADB_HOST`
+
 ## Add sites to proxy
 
 Change `SITES` variable to the list of sites created encapsulated in backtick and separated by comma with no space. e.g. ``SITES=`site1.example.com`,`site2.example.com` ``.

installation/frappe-postgresql/docker-compose.yml

@@ -52,6 +52,7 @@ services:
     restart: on-failure
     environment:
       - POSTGRES_HOST=${POSTGRES_HOST}
+      - DB_PORT=5432
       - REDIS_CACHE=redis-cache:6379
       - REDIS_QUEUE=redis-queue:6379
       - REDIS_SOCKETIO=redis-socketio:6379