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Docker

Quickstart

We provide an example docker-compose.yml to quickly get set up with cardano-db-sync. Keep in mind that this is only a template, and users are encouraged to tweak it to meet their needs.

It is not recommended to use this for a production set up, and should only be used for local development.

Create a working directory:

mkdir ~/src
cd ~/src

Download the example Docker Compose file:

curl -o docker-compose.yml \
  https://raw.githubusercontent.com/IntersectMBO/cardano-db-sync/master/docker-compose.example.yml

Start cardano-node, postgresql, and cardano-db-sync services:

docker compose up -d && docker compose logs -f

The PostgreSQL database should now be exposed on localhost port 5432

To connect to PostgreSQL database:

psql -h 0.0.0.0 -p 5432 -U postgres -d cexplorer

Connecting to a Other Networks

To connect to different network use NETWORK environment variable:

NETWORK=preprod docker compose up -d && docker compose logs -f

Running cardano-db-sync

Start cardano-db-sync:

docker run \
  --env NETWORK=mainnet \
  --env POSTGRES_HOST=postgres \
  --env POSTGRES_PORT=5432 \
  --volume db-sync-data:/var/lib/cexplorer \
  --volume node-ipc \
  ghcr.io/IntersectMBO/cardano-db-sync:13.3.0.0

Environment Variables

NETWORK

Specifies a network to connect to. If specified, cardano-db-sync will provide the configuration files. If not specified, will call the cardano-db-sync executable as the entrypoint. Possible values are:

  • mainnet
  • preprod
  • preview
  • private
  • sanchonet
  • shelley_qa

POSTGRES_HOST (required)

The PostgreSQL server host to connect to.

POSTGRES_PORT (required)

Specifies the PostgreSQL server port to connect to.

POSTGRES_USER (required)

The PostgreSQL server user to connect as.

POSTGRES_PASSWORD (required)

Specifies the PostgreSQL server password to connect as.

RESTORE_SNAPSHOT (optional)

Specifies a cardano-db-sync snapshot archive to download and restore from. If omitted, it will sync from genesis. see Restoring From Snapshots

DB_SYNC_CONFIG (optional)

Overrides the db-sync-config.json provided by the network configuration. See Overriding Network Configuration.

EXTRA_DB_SYNC_ARGS (optional)

Extra command line arguments to pass to cardano-db-sync. For example:

docker run \
  --env NETWORK=mainnet \
  --env POSTGRES_HOST=postgres \
  --env POSTGRES_PORT=5432 \
  --env EXTRA_DB_SYNC_ARGS="--skip-fix"
  --volume db-sync-data:/var/lib/cexplorer \
  --volume node-ipc \
  ghcr.io/IntersectMBO/cardano-db-sync:13.3.0.0

Overriding Network Configuration

Overriding the configuration file can be done by passing the DB_SYNC_CONFIG environment variable:

docker run \
  --env NETWORK=mainnet \
  --env POSTGRES_HOST=postgres \
  --env POSTGRES_PORT=5432 \
  --env DB_SYNC_CONFIG=/config/db-sync-config.json \
  --volume db-sync-data:/var/lib/cexplorer \
  --volume node-ipc:/node-ipc \
  --volume $PWD/environments/mainnet:/config \
  ghcr.io/IntersectMBO/cardano-db-sync:13.3.0.0

Restoring From Snapshots

Snapshots are provided for mainnet to restore the PostgreSQL database. See the latest releases for a recent snapshot matched with the cardano-db-sync version.

Although, you can specify a URL directly, we recommend downloading the image separately to avoid having to download it multiple times in case of failure. First, download the latest snapshot:

curl -O https://update-cardano-mainnet.iohk.io/cardano-db-sync/13.3/db-sync-snapshot-schema-13.3-block-10611621-x86_64.tgz

Restore the snapshot with RESTORE_SNAPSHOT:

docker run \
  --env NETWORK=mainnet \
  --env POSTGRES_HOST=postgres \
  --env POSTGRES_PORT=5432 \
  --env RESTORE_SNAPSHOT=/data/db-sync-snapshot-schema-13.3-block-10611621-x86_64.tgz \
  --volume db-sync-data:/var/lib/cexplorer \
  --volume node-ipc:/node-ipc \
  --volume $PWD:/data
  ghcr.io/IntersectMBO/cardano-db-sync:13.3.0.0

Advanced Usage

Excluding the NETWORK environment variable will simply call the cardano-db-sync executable as the entrypoint, so you must pass command line arguments to projvide runtime configuration. The --schema-dir argument is automatically set and is not required.

docker run \
  --volume db-sync-data:/var/lib/cexplorer \
  --volume node-ipc:/node-ipc \
  --volume $PWD/environments/mainnet:/config \
  ghcr.io/IntersectMBO/cardano-db-sync:13.3.0.0 \
  run --config /config/db-sync-config.json --socket-path /node-ipc/node.socket

Running cardano-smash-server

Start cardano-smash-server:

docker run \
  --env NETWORK=mainnet \
  --env POSTGRES_HOST=postgres \
  --env POSTGRES_PORT=5432 \
  --env SMASH_USER=smash-admin \
  --env SMASH_PASSWORD=smash-password \
  --publish 3100:3100 \
  --volume node-ipc:/node-ipc \
  ghcr.io/IntersectMBO/cardano-smash-server:13.3.0.0

Environment Variables

NETWORK (optional)

Specifies a network to connect to. If specified, cardano-db-sync will provide the configuration files. If not specified, will call the cardano-db-sync executable as the entrypoint. Possible values are:

  • mainnet
  • preprod
  • preview
  • private
  • sanchonet
  • shelley_qa

POSTGRES_HOST (required)

The PostgreSQL server host to connect to.

POSTGRES_PORT (required)

Specifies the PostgreSQL server port to connect to.

POSTGRES_USER (required)

The PostgreSQL server user to connect as.

POSTGRES_PASSWORD (required)

Specifies the PostgreSQL server password to connect as.

SMASH_USER (optional)

Sets the user for HTTP basic authentication

SMASH_PASSWORD (optional)

Sets the password for HTTP basic authentication

Advanced Usage

Excluding the NETWORK environment variable will simply call the cardano-smash-server executable as the entrypoint, so you must pass command line arguments to provide runtime configuration.

docker run \
  --volume node-ipc:/node-ipc \
  --volume $PWD/environments/mainnet:/config \
  ghcr.io/IntersectMBO/cardano-db-sync:13.3.0.0 \
  --config /config/db-sync-config.json --port 3100

Building

Building Docker images is done with Nix and requires Linux:

nix build .#cardano-db-sync-docker

This will generate a tar.gz file linked to ./result that can be loaded into docker and run as a normal image.

docker load < result
docker run cardano-db-sync

Running Tests with Docker PostgreSQL

Create a pgpass-test file with the credentials of (taken from config/secrets/postgres_* files):

echo "localhost:5432:cexplorer:postgres:v8hlDV0yMAHHlIurYupj" > config/pgpass-test
chmod 0600 config/pgpass-test
export PGPASSFILE=$PWD/config/pgpass-test

Start PostgreSQL via Docker Compose:

docker compose -f docker-test.yml up

Run the migrations:

cabal run cardano-db-tool run-migrations -- --mdir schema/ --ldir .

Run the tests:

cabal test cardano-db

When you've finished with testing, stop and remove the test containers:

docker compose -f docker-test.yml down