Running YDB in Docker

Before start

Create a folder for testing YDB and use it as the current working directory:

mkdir ~/ydbd && cd ~/ydbd
mkdir ydb_data
mkdir ydb_certs

Launching a container with YDB in Docker

Example of the YDB startup command in Docker with detailed comments:

docker_args=(
    -d                              # run container in background and print container ID
    --rm                            # automatically remove the container
    --name ydb-local                # assign a name to the container
    --hostname localhost            # hostname
    --platform linux/amd64          # platform
    -p 2135:2135                    # publish a container grpcs port to the host
    -p 2136:2136                    # publish a container grpc port to the host
    -p 8765:8765                    # publish a container http port to the host
    -p 5432:5432                    # publish a container port to the host that provides PostgreSQL compatibility
    -p 9092:9092                    # publish a container port to the host that provides Kafka compatibility
    -v $(pwd)/ydb_certs:/ydb_certs  # mount directory with TLS certificates
    -v $(pwd)/ydb_data:/ydb_data    # mount working directory
    -e GRPC_TLS_PORT=2135           # grpcs port, needs to match what's published above
    -e GRPC_PORT=2136               # grpc port, needs to match what's published above
    -e MON_PORT=8765                # http port, needs to match what's published above
    -e YDB_KAFKA_PROXY_PORT=9092    # port, needs to match what's published above
    ydbplatform/local-ydb:latest
)

docker run "${docker_args[@]}"

For more information about environment variables available when running a Docker container with YDB, see Configuring the YDB Docker container.

With the parameters specified in the example above and running Docker locally, Embedded UI YDB will be available at http://localhost:8765.

For more information about stopping and deleting a Docker container with YDB, see Docker stop.

Overriding the configuration file

By default, when starting a Docker container for YDB, a built-in configuration file is used, which provides standard operating parameters. To override the configuration file when starting the container, you can use the --config-path parameter, specifying the path to your configuration file, which has been pre-mounted in the container:

docker run "${docker_args[@]}" --config-path /path/to/your/config/file

For users who are not experienced with Docker, it's important to understand how to properly mount a configuration file into the container. Below is a step-by-step example:

1. Run the container without specifying a configuration file and without mounting the data directory, so that it generates a default configuration:

   docker run -d \
     --rm \
     --name ydb-local \
     --hostname localhost \
     --platform linux/amd64 \
     -v $(pwd)/ydb_certs:/ydb_certs \
     -e GRPC_TLS_PORT=2135 \
     -e GRPC_PORT=2136 \
     -e MON_PORT=8765 \
     ydbplatform/local-ydb:latest
   

2. Create a directory for your configuration files and copy the generated configuration file from the container directly to it:

   mkdir ydb_config
   docker cp ydb-local:/ydb_data/cluster/kikimr_configs/config.yaml ydb_config/my-ydb-config.yaml
   

3. Stop the container if it's still running, and remove the created data directory:

   docker stop ydb-local
   rm -rf ydb_data
   

4. Edit the copied configuration file ydb_config/my-ydb-config.yaml as needed.

5. When running the container, use the -v flag to mount the directory with your configuration file into the container:

   docker_args=(
       -d
       --rm
       --name ydb-local
       --hostname localhost
       --platform linux/amd64
       -p 2135:2135
       -p 2136:2136
       -p 8765:8765
       -v $(pwd)/ydb_data:/ydb_data
       -v $(pwd)/ydb_config:/ydb_config
       -v $(pwd)/ydb_certs:/ydb_certs
       -e GRPC_TLS_PORT=2135
       -e GRPC_PORT=2136
       -e MON_PORT=8765
       ydbplatform/local-ydb:latest
   )
   
   docker run "${docker_args[@]}" --config-path /ydb_config/my-ydb-config.yaml
   

In this example:

• $(pwd)/ydb_config - the local directory on your computer with the configuration file
• /ydb_config - directory inside the container where your local directory will be mounted
• /ydb_config/my-ydb-config.yaml - path to the configuration file inside the container

This way, your local configuration file becomes accessible inside the container at the specified path.