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Docker

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Rhys Bartels-Waller edited this page Jul 23, 2020 · 9 revisions

Docker builds of cardano-explorer-api and cardano-submit-api are available on Docker Hub.

Every release is tagged using semantic versioning and pushed to Docker Hub. For instance, images for the release 2.0.0 can be pulled from Docker Hub via:

$ docker pull inputoutput/cardano-explorer-api:2.0.0
$ docker pull inputoutput/cardano-submit-api:2.0.0

The docker-compose.yaml in this repository provides a working reference, and can be used as-is with the addition of database configuration files to manage the stack of Cardano services.

How To Configure

An example configuration is given in the config folder at the root of the repository:

config/
├── postgres_db.example
├── postgres_password.example
└── postgres_user.example

To get started, simply remove the .example suffix from each file. On a real setup, you'd provision these credentials yourself.

⚠️ As of today, it is absolutely mandatory for the postgres_user to be defined as cexplorer. ⚠️

How To Build / Run

NETWORK=testnet docker-compose up

The NETWORK environment variable is required and can be set to either mainnet or testnet. Be careful when submitting transactions through mainnet!

How To Use

By default,

Have a look at the API Documentations to get started. For example:

$ curl http://localhost:8100/api/txs/last

Will give you the last few transactions known on the network.

Start the full stack in detached mode, then view output from containers

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

The initial sync will take some time, but you can stop and resume at any point if retaining the data volumes.

List containers

docker-compose ps -a

Show logs from a specific service

docker-compose logs -f cardano-explorer-api

Display running processes

docker-compose top

Stop the stack

docker-compose stop

Rebuild database during version upgrade

When instructed to rebuild the DB, retaining the cardano-node data volume is important to minimize the sync time:

docker-compose stop
docker volume ls
# copy the volume ending in *_postgres-data to the clipboard
docker volume rm [PASTE]
docker-compose pull # this will fetch the update if the `latest` tag is present in your compose file
docker-compose start --force-recreate

Stop and remove containers, networks, images, and volumes

⚠️ Only do this if you need to wipe all state from the host.

docker-compose down -v

Troubleshooting

If you have a port clash on the host, change the mapping in the docker-compose

Building the Docker image locally

Ensure that you have Nix installed and the IOHK binary cache enabled (instructions).

Then run these commands from the cardano-rest git repository:

docker load -i $(nix-build -A dockerImages.submitApi --no-out-link)
docker load -i $(nix-build -A dockerImages.explorerApi --no-out-link)

If you have no local changes, the build should be downloaded from the IOHK binary cache then loaded into the local Docker registry.

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