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containers.md

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Containers (Docker or Podman)

Demo environment

It is simple to setup the index with the default configuration and run it using the pre-built public docker image:

With Docker:

docker run -it torrust/index:latest

or with Podman:

podman run -it torrust/index:latest

Requirements

  • Tested with recent versions of Docker or Podman.

Volumes

The Containerfile (i.e. the Dockerfile) Defines Three Volumes:

VOLUME ["/var/lib/torrust/index","/var/log/torrust/index","/etc/torrust/index"]

When instancing the container image with the docker run or podman run command, we map these volumes to the local storage:

./storage/index/lib -> /var/lib/torrust/index
./storage/index/log -> /var/log/torrust/index
./storage/index/etc -> /etc/torrust/index

NOTE: You can adjust this mapping for your preference, however this mapping is the default in our guides and scripts.

Pre-Create Host-Mapped Folders

Please run this command where you wish to run the container:

mkdir -p ./storage/index/lib/ ./storage/index/log/ ./storage/index/etc/

Matching Ownership ID's of Host Storage and Container Volumes

It is important that the torrust user has the same uid $(id -u) as the host mapped folders. In our entry script, installed to /usr/local/bin/entry.sh inside the container, switches to the torrust user created based upon the USER_UID environmental variable.

When running the container, you may use the --env USER_ID="$(id -u)" argument that gets the current user-id and passes to the container.

Mapped Tree Structure

Using the standard mapping defined above produces this following mapped tree:

storage/index/
├── lib
│   ├── database
│   │   └── sqlite3.db     => /var/lib/torrust/index/database/sqlite3.db [auto populated]
│   └── tls
│       ├── localhost.crt  => /var/lib/torrust/index/tls/localhost.crt [user supplied]
│       └── localhost.key  => /var/lib/torrust/index/tls/localhost.key [user supplied]
├── log                    => /var/log/torrust/index (future use)
└── etc
    └── index.toml        => /etc/torrust/index/index.toml [auto populated]

NOTE: you only need the tls directory and certificates in case you have enabled SSL.

Building the Container

Clone and Change into Repository

# Inside your dev folder
git clone https://github.com/torrust/torrust-index.git; cd torrust-index

(Docker) Setup Context

Before starting, if you are using docker, it is helpful to reset the context to the default:

docker context use default

(Docker) Build

# Release Mode
docker build --target release --tag torrust-index:release --file Containerfile .

# Debug Mode
docker build --target debug --tag torrust-index:debug --file Containerfile .

(Podman) Build

# Release Mode
podman build --target release --tag torrust-index:release --file Containerfile .

# Debug Mode
podman build --target debug --tag torrust-index:debug --file Containerfile .

Running the Container

Basic Run

No arguments are needed for simply checking the container image works:

(Docker) Run Basic

# Release Mode
docker run -it torrust-index:release

# Debug Mode
docker run -it torrust-index:debug

(Podman) Run Basic

# Release Mode
podman run -it torrust-index:release

# Debug Mode
podman run -it torrust-index:debug

Arguments

The arguments need to be placed before the image tag. i.e.

run [arguments] torrust-index:release

Environmental Variables:

Environmental variables are loaded through the --env, in the format --env VAR="value".

The following environmental variables can be set:

  • TORRUST_INDEX_CONFIG_TOML_PATH - The in-container path to the index configuration file, (default: "/etc/torrust/index/index.toml").
  • TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN - Override of the admin token. If set, this value overrides any value set in the config.
  • TORRUST_INDEX_CONFIG_OVERRIDE_AUTH__SECRET_KEY - Override of the auth secret key. If set, this value overrides any value set in the config.
  • TORRUST_INDEX_DATABASE_DRIVER - The database type used for the container, (options: sqlite3, mysql, default sqlite3). Please Note: This dose not override the database configuration within the .toml config file.
  • TORRUST_INDEX_CONFIG_TOML - Load config from this environmental variable instead from a file, (i.e: TORRUST_INDEX_CONFIG_TOML=$(cat index-index.toml)).
  • USER_ID - The user id for the runtime crated torrust user. Please Note: This user id should match the ownership of the host-mapped volumes, (default 1000).
  • API_PORT - The port for the index API. This should match the port used in the configuration, (default 3001).

Sockets

Socket ports used internally within the container can be mapped to with the --publish argument.

The format is: --publish [optional_host_ip]:[host_port]:[container_port]/[optional_protocol], for example: --publish 127.0.0.1:8080:80/tcp.

The default ports can be mapped with the following:

--publish 0.0.0.0:3001:3001/tcp

NOTE: Inside the container it is necessary to expose a socket with the wildcard address 0.0.0.0 so that it may be accessible from the host. Verify that the configuration that the sockets are wildcard.

Mapped Volumes

By default the container will install volumes for /var/lib/torrust/index, /var/log/torrust/index, and /etc/torrust/index, however for better administration it good to make these volumes host-mapped.

The argument to host-map volumes is --volume, with the format: --volume=[host-src:]container-dest[:<options>].

The default mapping can be supplied with the following arguments:

--volume ./storage/index/lib:/var/lib/torrust/index:Z \
--volume ./storage/index/log:/var/log/torrust/index:Z \
--volume ./storage/index/etc:/etc/torrust/index:Z \

Please not the :Z at the end of the podman --volume mapping arguments, this is to give read-write permission on SELinux enabled systemd, if this doesn't work on your system, you can use :rw instead.

Complete Example

With Docker

## Setup Docker Default Context
docker context use default

## Build Container Image
docker build --target release --tag torrust-index:release --file Containerfile .

## Setup Mapped Volumes
mkdir -p ./storage/index/lib/ ./storage/index/log/ ./storage/index/etc/

## Run Torrust Index Container Image
docker run -it \
    --env TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN="MySecretToken" \
    --env TORRUST_INDEX_CONFIG_OVERRIDE_AUTH__SECRET_KEY="MaxVerstappenWC2021" \
    --env USER_ID="$(id -u)" \
    --publish 0.0.0.0:3001:3001/tcp \
    --volume ./storage/index/lib:/var/lib/torrust/index:Z \
    --volume ./storage/index/log:/var/log/torrust/index:Z \
    --volume ./storage/index/etc:/etc/torrust/index:Z \
    torrust-index:release

With Podman

## Build Container Image
podman build --target release --tag torrust-index:release --file Containerfile .

## Setup Mapped Volumes
mkdir -p ./storage/index/lib/ ./storage/index/log/ ./storage/index/etc/

## Run Torrust Index Container Image
podman run -it \
    --env TORRUST_INDEX_CONFIG_OVERRIDE_TRACKER__TOKEN="MySecretToken" \
    --env USER_ID="$(id -u)" \
    --publish 0.0.0.0:3001:3001/tcp \
    --volume ./storage/index/lib:/var/lib/torrust/index:Z \
    --volume ./storage/index/log:/var/log/torrust/index:Z \
    --volume ./storage/index/etc:/etc/torrust/index:Z \
    torrust-index:release