CockroachDB Remote Client

Docker image used to perform simple tasks against a CockroachDB cluster then disappear. For example, this can be useful for creating a database or setting configuration parameters, especially when used in Kubernetes or Docker Compose. The following docker-compose.yml snippet highlights how it may be used, specifically the crdb-init service.

services:

  crdb-0:
    ...

  crdb-1:
    ...

  crdb-2:
    ...

  lb:
    container_name: lb
    hostname: lb
    image: timveil/dynamic-haproxy:latest
    ports:
      - "26257:26257"
      - "8080:8080"
      - "8081:8081"
    environment:
      - NODES=crdb-0 crdb-1 crdb-2
    depends_on:
      - crdb-0
      - crdb-1
      - crdb-2

  crdb-init:
    container_name: crdb-init
    hostname: crdb-init
    image: timveil/cockroachdb-remote-client:latest
    environment:
      - COCKROACH_HOST=crdb-0:26257
      - COCKROACH_INSECURE=true
      - DATABASE_NAME=test
    depends_on:
      - lb

The following environment variables are supported. See https://www.cockroachlabs.com/docs/stable/use-the-built-in-sql-client.html#client-connection for more details.

• COCKROACH_HOST - Required. CockroachDB host and port number to connect to <host>:<port>. If port not included you must specify COCKROACH_PORT.
• COCKROACH_USER - Required. CockroachDB user that will own the remote client session.
• COCKROACH_PORT - CockroachDB port if not specified by COCKROACH_HOST.
• COCKROACH_INSECURE - Use an insecure connection. Value must be true or false.
• COCKROACH_CERTS_DIR - The path to the certificate directory containing the CA and client certificates and client key.
• DATABASE_NAME - Name of database to create.
• DATABASE_USER - Name of new database user to create. Important, this user will be created as a CockroachDB admin.
• DATABASE_PASSWORD - Password for DATABASE_USER. If not provided the password will be set to NULL preventing the user from using password based authentication.
• COCKROACH_ORG - The value of the cluster.organization setting.
• COCKROACH_LICENSE_KEY - The value of the enterprise.license setting.
• COCKROACH_INIT - Initializes the CockroachDB cluster with the cockroach init command.

Building the Image

docker build --no-cache -t timveil/cockroachdb-remote-client:latest .

Publishing the Image

docker push timveil/cockroachdb-remote-client:latest

Running the Image

docker run -it timveil/cockroachdb-remote-client:latest

running the image with environment variables

docker run \
    --env COCKROACH_HOST=localhost:26257 \
    --env COCKROACH_INSECURE=true \
    --env DATABASE_NAME=test \
    --env COCKROACH_INIT=true \
    -it timveil/cockroachdb-remote-client:latest