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docker-cloudsqlproxy

Google CloudSQL proxy service

This repo creates a wrapper (entrypoint) script to be used in the Google distributed CloudSQL proxy container. The entrypoint.sh script autoruns when you run the docker container created using the Dockerfile in this repo. All the settings for the CloudSQL proxy are "passed" in using environment variables - enabling a much simplier configuration.

The script assumes one of two forms of service account authentication.

  1. A service account json file that is mounted into the docker container either under the default path (/etc/sqlproxy-service-account.json) or under the path specified by the environment var (CLOUDSQL_CREDENTIAL_FILE)
  2. Or using the "application" default service account. This is either the service account used to create the GCE compute instance the docker is running on OR what ever the current user is authed as if they are running it on a non-GCE host.

There are also two methods of setting the connection string used by the proxy.

  1. Specify an explicit list of one or more databases using the environment variable (CLOUDSQL_CONNECTION_LIST). This list must contain at least one connection setting using the following format. Multiple settings should be comman seperated and all use UNIQUE port numbers (PORT)

    GOOGLE_PROJECT:CLOUDSQL_ZONE:CLOUDSQL_INSTANCE=0.0.0.0:PORT

    GOOGLE_PROJECT: Google project where cloudsql instance resides CLOUDSQL_ZONE: Zone that the cloudsql instance resides CLOUDSQL_INSTANCE: the exact name of the cloudsql instance PORT: the TCP port number that the cloudsql proxy will listen on for connections to the cloudsql instance.

  2. By specifying all of the following as environment variables. Using this method supports only a single cloudsql instance.

    GOOGLE_PROJECT: Google project where cloudsql instance resides CLOUDSQL_ZONE: Zone that the cloudsql instance resides CLOUDSQL_INSTANCE: the exact name of the cloudsql instance PORT: the TCP port number that the cloudsql proxy will listen on for connections to the cloudsql instance.

Additional settings:

CLOUDSQL_MAXCONNS: set the max number of database connections the cloudsql proxy will support. Default is unlimited CLOUDSQL_LOGGING: Logging setting. Default is verbose logging