# patroni.postgresql.postmaster module

class patroni.postgresql.postmaster.PostmasterProcess(pid: int)

  Bases: `Process`

  __init__(pid: int) → None
  classmethod _from_pidfile(data_dir: str) → PostmasterProcess | None
  _is_postmaster_process() → bool
  static _read_postmaster_pidfile(data_dir: str) → Dict[str, str]

    Reads and parses postmaster.pid from the data directory

    :returns dictionary of values if successful, empty dictionary otherwise

  classmethod from_pid(pid: int) → PostmasterProcess | None
  static from_pidfile(data_dir: str) → PostmasterProcess | None
  pg_ctl_kill(mode: str, pg_ctl: str) → bool | None
  signal_kill() → bool

    to suspend and kill postmaster and all children

    :returns True if postmaster and children are killed, False if error

  signal_stop(mode: str, pg_ctl: str = 'pg_ctl') → bool | None

    Signal postmaster process to stop

    :returns None if signaled, True if process is already gone, False if error

  static start(pgcommand: str, data_dir: str, conf: str, options: List[str]) → PostmasterProcess | None
  wait_for_user_backends_to_close(stop_timeout: float | None) → None

patroni.postgresql.postmaster.pg_ctl_start(conn: Connection, cmdline: List[str], env: Dict[str, str]) → None