Docker Image

Docker Image

Algorand's Conduit data pipeline packaged for docker.

This document provides some basic guidance and commands tailored for the docker container. For additional information refer to the full documentation.

Configuration

Special locations in the container designed to modify behavior:

File	Description
/etc/algorand/config.yml	Required. Conduit configuration file. Definition for the pipeline behavior.
/data	Optional. Data directory. For persistence you may mount a volume at this location. See volume permissions sections for additional information.

Usage

Conduit needs a configuration file to define the data pipeline. There are built-in utilities to help create the configuration. Once a configuration is made launch conduit and pass in the configuration to use.

Creating a conduit.yml configuration

The init subcommand can be used to create a configuration template. See the options here:

docker run algorand/conduit init -h

For a simple default configuration, run with no arguments:

docker run algorand/conduit init > conduit.yml

Plugins can also be named directly.

See a list of available plugins:

docker run algorand/conduit list

Provide plugins to the init command:

docker run algorand/conduit init --importer algod --processors filter_processor --exporter postgresql > conduit.yml

Run with conduit.yml

With conduit.yml in your current working directory, it can be mounted directly to /data/conduit.yml. This is good for testing and some deployments which override the starting round. For a more complete deployment see the next section which explains how to mount the entire data directory.

Mount conduit.yml with the following command:

docker run -it -v $(pwd)/conduit.yml:/etc/algorand/conduit.yml algorand/conduit

Mounting the Data Directory

For production deployments, you should consider mounting the entire data directory. This way you can persist state across images during an upgrade, or for backups. The data directory is located at /data. When mounting a data directory, it must contain the conduit.yml file.

docker run -it -v $(pwd)/local_data_dir:/data algorand/conduit

Volume Permissions

The container executes in the context of the algorand user with UID=999 and GID=999 which is handled differently depending on your operating system or deployment platform. During startup the container temporarily runs as root in order to modify the permissions of /data. It then changes to the algorand user. This can sometimes cause problems, for example if your deployment platform doesn't allow containers to run as the root user.

Use specific UID and GID

If you do not want the container to start as the root user you can specify a UID and GID. On the host system, ensure the directory being mounted uses UID=999 and GID=999. If the directory already has these permissions you may override the default user with -u 999:999.