startPostgres function

Future<DockerProcess> startPostgres({ required String name, required String version, String imageName = 'postgres', String? network, String? pgUser, String pgPassword = 'postgres', String? pgDatabase, int pgPort = 5432, bool? cleanup, String? postgresqlConfPath, String? pgHbaConfPath, List<String>? configurations, })

Starts a postgres container with the given name using the given imageName and version.

Use postgresqlConfPath or pgHbaConfPath to mount postgresql.conf or pg_hba.conf on the container, respectively.

Use configurations to pass list of configs to the postgres image. For example: 'shared_buffers=256MB', 'max_connections=200'. As shown, each item in the list must contain the parameter and its assignment in as a single item.

For other options, please refer to DockerProcess.start.

Implementation

Future<DockerProcess> startPostgres({
  required String name,
  required String version,
  String imageName = 'postgres',
  String? network,
  String? pgUser,
  String pgPassword = 'postgres',
  String? pgDatabase,
  int pgPort = 5432,
  bool? cleanup,
  String? postgresqlConfPath,
  String? pgHbaConfPath,
  List<String>? configurations,
}) async {
  var ipv4 = false;

  final dockerArgs = <String>[];
  final imageArgs = <String>[];

  if (configurations != null) {
    for (var config in configurations) {
      imageArgs.add('-c');
      imageArgs.add(config);
    }
  }

  // see Database Configuration section at official image page:
  // https://hub.docker.com/_/postgres/
  if (postgresqlConfPath != null) {
    dockerArgs.add('-v');
    dockerArgs.add('$postgresqlConfPath:/etc/postgresql/postgresql.conf');

    imageArgs.add('-c');
    imageArgs.add('config_file=/etc/postgresql/postgresql.conf');
  }

  if (pgHbaConfPath != null) {
    dockerArgs.add('-v');
    dockerArgs.add('$pgHbaConfPath:/etc/postgresql/pg_hba.conf');

    imageArgs.add('-c');
    imageArgs.add('hba_file=/etc/postgresql/pg_hba.conf');
  }

  return await DockerProcess.start(
    name: name,
    dockerArgs: dockerArgs,
    image: '$imageName:$version',
    imageArgs: imageArgs,
    network: network,
    hostname: name,
    ports: ['$pgPort:5432'],
    cleanup: cleanup,
    readySignal: (line) {
      ipv4 |= line.contains('listening on IPv4 address "0.0.0.0", port 5432');
      return ipv4 &&
          line.contains('database system is ready to accept connections');
    },
    environment: {
      if (pgUser != null) 'POSTGRES_USER': pgUser,
      'POSTGRES_PASSWORD': pgPassword,
      if (pgDatabase != null) 'POSTGRES_DB': pgDatabase,
    },
  );
}