# Docker Install

This version of the FlowForge platform is intended for running in the Docker Container management system. Typically suited for small/medium on premise deployments.

# Prerequisites

# Platform

The following instructions assume you are running Docker on a Linux or MacOS host system.

# Digital Ocean

If you are using the Digital Ocean Docker Droplet to host FlowForge you will need to ensure that port 80 & 443 are opened in the UFW firewall before starting.

sudo ufw apply http
sudo ufw apply https

We have a 1-Click Digital Ocean Droplet that will install and configure FlowForge for you. Details can be found here

# Docker Compose

FlowForge uses Docker Compose to install and manage the required components. Instructions on how to install Docker Compose on your system can be found here:

https://docs.docker.com/compose/install/

# DNS

The orchestration uses an instance of Nginx to route requests to each Node-RED instance. To do this it needs each instance to have a unique hostname, to generate this the instance name is prepended to a supplied domain.

To make this work you will need to configure a DNS server to map a wildcard domain entry to the IP address of the host running Docker. e.g *.example.com.

The FlowForge Application will be hosted on http://forge.example.com

Note When testing locally you can add entries for each Node-RED instance to your /etc/hosts file but you must use the external IP address of the host machine, not the loopback address (127.0.0.1).

Notes on how to setup DNS can be found here.

# Installing FlowForge

# Download

Download the latest release tar.gz from the docker-compose project:

https://github.com/flowforge/docker-compose/releases/latest

Unpack this and cd into the created directory.

tar zxf v1.x.y.tar.gz
cd docker-compose-1.x.y

# Configuring FlowForge

Configuration details are stored in the etc/flowforge.yml and the docker-compose.yml files.

Before starting you will need to edit this file to update the the following fields in the etc/flowforge.yml file:

domain
base_url
broker.public_url

These will need to be updated to replace .example.com with the domain you chose earlier.

Please note that once set, the domain and base_url values should not be changed as these values are used as part of the configuration stored in the database of each Node-RED instance. The ability to migrate domains is on the feature backlog.

You also need to update all the VIRTUAL_HOST entries in the docker-compose.yml file to replace .example.com with the same domain.

For more details on the options available, see the configuration guide.

# HTTPS (optional)

If you want to serve the forge app and Node-RED via SSL you will need to obtain a wildcard TLS certificate for the domain you are using eg *.example.com. If you are running on an Internet facing machine you can use the LetsEncrypt acme-companion.

Otherwise you will need to contact a SSL Certificate vendor and configure Nginx manually.

# Let's Encrypt

In the docker-compose.yml file, uncomment the following lines

- "./certs:/etc/nginx/certs"

- "443:443"

  acme:
    image: nginxproxy/acme-companion
    volumes:
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
      - "./acme:/etc/acme.sh"
    volumes_from:
      - nginx:rw
    environment:
      - "DEFAULT_EMAIL=mail@example.com"
    depends_on:
      - "nginx"

If you wish to redirect all traffic to use HTTPS then add the following section to the nginx service on docker-compose.yml

environment:
      - "HTTPS_METHOD=redirect"

Then, in the docker-compose.yml file, edit the following lines added your domain and email address

- "DEFAULT_EMAIL=mail@example.com"

- "LETSENCRYPT_HOST=mqtt.example.com"

- "LETSENCRYPT_HOST=forge.example.com"

You will also need to update the etc/flowforge.yml file to change base_url from starting with http:// to https:// and the broker.public_url entry from starting with ws:// to wss://.

# Wildcard TLS Certificate

Create a folder in the docker-compose-1.x.0 directory named certs, place your .crt and .key files in there, they should be named for the domain without the * eg example.com.crt & example.com.key You also need to create a copy of the .crt and .key files named default.crt & default.key in the same folder. This is used for serving unknown hosts.

In the docker-compose.yml file,

uncomment the line

-   "443:443"

Add this line to the volumes section of the nginx proxy

- "./certs:/etc/nginx/certs"

If you wish to redirect all traffic to use HTTPS then add the following section to the nginx service on docker-compose.yml

environment:
      - "HTTPS_METHOD=redirect"

You will also need to update the etc/flowforge.yml file to change the broker.public_url entry from starting with ws:// to wss://.

# Running FlowForge

We need to manually download the flowforge/node-red container that will be used for the default stack.

This is done with this command:

docker pull flowforge/node-red

Once that completes we can start FlowForge:

Using the docker compose plugin

docker compose -p flowforge up -d

Or using the docker-compose command

docker-compose -p flowforge up -d

This will also create a directory called db to hold the database files used to store Node-RED instance and user information.

# First Run Setup

The first time you access the platform in your browser, it will take you through creating an administrator for the platform and other configuration options.

For more information, follow this guide.

Once you have finished setting up the admin user there are some Docker specific items to consider.

# Using FlowForge File Storage

Node-RED instances running in Docker do not have direct access to a persistent file system to store files or use for storing context data.

FlowForge includes a File Storage service that can be enabled to provide persistent storage.

# Disabling the default File nodes

To remove the default Node-RED file nodes from the palette:

Edit the Template to add 10-file.js,23-watch.js to the "Exclude nodes by filename" section

# Configuring the File Storage service

Full details on configuring the file storage service are available here.

# Enabling the File Storage service

To enable the FlowForge File Storage component add the following to the etc/flowforge.yml file:

fileStore:
  enabled: true

# Upgrade

Stop the existing instance with
```
docker-compose -p flowforge down
```
Download the latest Source code tar.gz here
Uncompress the tar file to a new directory
Pull the latest version of the containers from Docker hub
- docker pull flowforge/forge-docker
- docker pull flowforge/node-red
- docker pull flowforge/file-server
Copy the db (and the certs & acme if using HTTPS certs) directory from the old version directory to the new (this will probably require root due to file ownership)
```
sudo cp -r docker-compose-x.x.x/db docker-compose-y.y.y/db
```
Compare the old docker-compose.yml to the version supplied with the new version, copy over any changes made, e.g. enabling HTTPS/TLS Certificates and setting the VIRUAL_HOST environment variables.
Start the new version in the new directory
```
docker-compose -p flowforge up
```