#!/usr/bin/python3 -u # -*- coding: utf-8 -*- import os, os.path, sys, stat, signal, errno, argparse, time, json, re, yaml, ast, socket, shutil, pwd, grp from datetime import datetime KILL_PROCESS_TIMEOUT = int(os.environ.get('KILL_PROCESS_TIMEOUT', 30)) KILL_ALL_PROCESSES_TIMEOUT = int(os.environ.get('KILL_ALL_PROCESSES_TIMEOUT', 30)) LOG_LEVEL_NONE = 0 LOG_LEVEL_ERROR = 1 LOG_LEVEL_WARNING = 2 LOG_LEVEL_INFO = 3 LOG_LEVEL_DEBUG = 4 LOG_LEVEL_TRACE = 5 SHENV_NAME_WHITELIST_REGEX = re.compile('\W') log_level = None environ_backup = dict(os.environ) terminated_child_processes = {} IMPORT_STARTUP_FILENAME="startup.sh" IMPORT_PROCESS_FILENAME="process.sh" IMPORT_FINISH_FILENAME="finish.sh" IMPORT_ENVIRONMENT_DIR="/container/environment" IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR="/container/environment/startup" ENV_FILES_YAML_EXTENSIONS = ('.yaml', '.startup.yaml') ENV_FILES_JSON_EXTENSIONS = ('.json', '.startup.json') ENV_FILES_STARTUP_EXTENSIONS = ('.startup.yaml', '.startup.json') IMPORT_SERVICE_DIR="/container/service" RUN_DIR="/container/run" RUN_STATE_DIR = RUN_DIR + "/state" RUN_ENVIRONMENT_DIR = RUN_DIR + "/environment" RUN_ENVIRONMENT_FILE_EXPORT = RUN_DIR + "/environment.sh" RUN_STARTUP_DIR = RUN_DIR + "/startup" RUN_STARTUP_FINAL_FILE = RUN_DIR + "/startup.sh" RUN_PROCESS_DIR = RUN_DIR + "/process" RUN_SERVICE_DIR = RUN_DIR + "/service" ENVIRONMENT_LOG_LEVEL_KEY = 'CONTAINER_LOG_LEVEL' ENVIRONMENT_SERVICE_DIR_KEY = 'CONTAINER_SERVICE_DIR' ENVIRONMENT_STATE_DIR_KEY = 'CONTAINER_STATE_DIR' class AlarmException(Exception): pass def write_log(level, message): now = datetime.now() for line in message.splitlines(): sys.stderr.write("*** %s | %s | %s\n" % (level, now.strftime("%Y-%m-%d %H:%M:%S"), line)) def error(message): if log_level >= LOG_LEVEL_ERROR: write_log(" ERROR ", message) def warning(message): if log_level >= LOG_LEVEL_WARNING: write_log("WARNING", message) def info(message): if log_level >= LOG_LEVEL_INFO: write_log(" INFO ", message) def debug(message): if log_level >= LOG_LEVEL_DEBUG: write_log(" DEBUG ", message) def trace(message): if log_level >= LOG_LEVEL_TRACE: write_log(" TRACE ", message) def debug_env_dump(): debug("------------ Environment dump ------------") for name, value in list(os.environ.items()): debug(name + " = " + value) debug("------------------------------------------") def ignore_signals_and_raise_keyboard_interrupt(signame): signal.signal(signal.SIGTERM, signal.SIG_IGN) signal.signal(signal.SIGINT, signal.SIG_IGN) raise KeyboardInterrupt(signame) def raise_alarm_exception(): raise AlarmException('Alarm') def listdir(path): try: result = os.stat(path) except OSError: return [] if stat.S_ISDIR(result.st_mode): return sorted(os.listdir(path)) else: return [] def is_exe(path): try: return os.path.isfile(path) and os.access(path, os.X_OK) except OSError: return False def xstr(s): if s is None: return '' return str(s) def set_env_hostname_to_etc_hosts(): try: if "HOSTNAME" in os.environ: socket_hostname = socket.gethostname() if os.environ["HOSTNAME"] != socket_hostname: ip_address = socket.gethostbyname(socket_hostname) with open("/etc/hosts", "a") as myfile: myfile.write(ip_address+" "+os.environ["HOSTNAME"]+"\n") except: warning("set_env_hostname_to_etc_hosts: failed at some point...") def python_dict_to_bash_envvar(name, python_dict): for value in python_dict: python_to_bash_envvar(name+"_KEY", value) python_to_bash_envvar(name+"_VALUE", python_dict.get(value)) values = "#COMPLEX_BASH_ENV:ROW: "+name+"_KEY "+name+"_VALUE" os.environ[name] = xstr(values) trace("python2bash : set : " + name + " = "+ os.environ[name]) def python_list_to_bash_envvar(name, python_list): values="#COMPLEX_BASH_ENV:TABLE:" i=1 for value in python_list: child_name = name + "_ROW_" + str(i) values += " " + child_name python_to_bash_envvar(child_name, value) i = i +1 os.environ[name] = xstr(values) trace("python2bash : set : " + name + " = "+ os.environ[name]) def python_to_bash_envvar(name, value): try: value = ast.literal_eval(value) except: pass if isinstance(value, list): python_list_to_bash_envvar(name,value) elif isinstance(value, dict): python_dict_to_bash_envvar(name,value) else: os.environ[name] = xstr(value) trace("python2bash : set : " + name + " = "+ os.environ[name]) def decode_python_envvars(): _environ = dict(os.environ) for name, value in list(_environ.items()): if value.startswith("#PYTHON2BASH:") : value = value.replace("#PYTHON2BASH:","",1) python_to_bash_envvar(name, value) def decode_json_envvars(): _environ = dict(os.environ) for name, value in list(_environ.items()): if value.startswith("#JSON2BASH:") : value = value.replace("#JSON2BASH:","",1) try: value = json.loads(value) python_to_bash_envvar(name,value) except: os.environ[name] = xstr(value) warning("failed to parse : " + xstr(value)) trace("set : " + name + " = "+ os.environ[name]) def decode_envvars(): decode_json_envvars() decode_python_envvars() def generic_import_envvars(path, override_existing_environment): if not os.path.exists(path): trace("generic_import_envvars "+ path+ " don't exists") return new_env = {} for envfile in listdir(path): filePath = path + os.sep + envfile if os.path.isfile(filePath) and "." not in envfile: name = os.path.basename(envfile) with open(filePath, "r") as f: # Text files often end with a trailing newline, which we # don't want to include in the env variable value. See # https://github.com/phusion/baseimage-docker/pull/49 value = re.sub('\n\Z', '', f.read()) new_env[name] = value trace("import " + name + " from " + filePath) for name, value in list(new_env.items()): if override_existing_environment or name not in os.environ: os.environ[name] = value trace("set : " + name + " = "+ os.environ[name]) else: debug("ignore : " + name + " = " + xstr(value) + " (keep " + name + " = " + os.environ[name] + " )") def import_run_envvars(): clear_environ() generic_import_envvars(RUN_ENVIRONMENT_DIR, True) def import_envvars(): generic_import_envvars(IMPORT_ENVIRONMENT_DIR, False) generic_import_envvars(IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR, False) def export_run_envvars(to_dir = True): if to_dir and not os.path.exists(RUN_ENVIRONMENT_DIR): warning("export_run_envvars: "+RUN_ENVIRONMENT_DIR+" don't exists") return shell_dump = "" for name, value in list(os.environ.items()): if name in ['USER', 'GROUP', 'UID', 'GID', 'SHELL']: continue if to_dir: with open(RUN_ENVIRONMENT_DIR + os.sep + name, "w") as f: f.write(value) trace("export " + name + " to " + RUN_ENVIRONMENT_DIR + os.sep + name) shell_dump += "export " + sanitize_shenvname(name) + "=" + shquote(value) + "\n" with open(RUN_ENVIRONMENT_FILE_EXPORT, "w") as f: f.write(shell_dump) trace("export "+RUN_ENVIRONMENT_FILE_EXPORT) def create_run_envvars(): set_dir_env() set_log_level_env() import_envvars() import_env_files() decode_envvars() export_run_envvars() def clear_run_envvars(): try: shutil.rmtree(RUN_ENVIRONMENT_DIR) os.makedirs(RUN_ENVIRONMENT_DIR) os.chmod(RUN_ENVIRONMENT_DIR, 700) except: warning("clear_run_envvars: failed at some point...") def print_env_files_order(file_extensions): if not os.path.exists(IMPORT_ENVIRONMENT_DIR): warning("print_env_files_order "+IMPORT_ENVIRONMENT_DIR+" don't exists") return to_print = 'Caution: previously defined variables will not be overriden.\n' file_found = False for subdir, _, files in sorted(os.walk(IMPORT_ENVIRONMENT_DIR)): for file in files: filepath = subdir + os.sep + file if filepath.endswith(file_extensions): file_found = True filepath = subdir + os.sep + file to_print += filepath + '\n' if file_found: if log_level < LOG_LEVEL_DEBUG: to_print+='\nTo see how this files are processed and environment variables values,\n' to_print+='run this container with \'--loglevel debug\'' info('Environment files will be proccessed in this order : \n' + to_print) def import_env_files(): if not os.path.exists(IMPORT_ENVIRONMENT_DIR): warning("import_env_files: "+IMPORT_ENVIRONMENT_DIR+" don't exists") return file_extensions = ENV_FILES_YAML_EXTENSIONS + ENV_FILES_JSON_EXTENSIONS print_env_files_order(file_extensions) for subdir, _, files in sorted(os.walk(IMPORT_ENVIRONMENT_DIR)): for file in files: if file.endswith(file_extensions): filepath = subdir + os.sep + file try: with open(filepath, "r") as f: debug("process environment file : " + filepath) if file.endswith(ENV_FILES_YAML_EXTENSIONS): env_vars = yaml.load(f) elif file.endswith(ENV_FILES_JSON_EXTENSIONS): env_vars = json.load(f) for name, value in list(env_vars.items()): if not name in os.environ: if isinstance(value, list) or isinstance(value, dict): os.environ[name] = '#PYTHON2BASH:' + xstr(value) else: os.environ[name] = xstr(value) trace("set : " + name + " = "+ os.environ[name]) else: debug("ignore : " + name + " = " + xstr(value) + " (keep " + name + " = " + os.environ[name] + " )") except: warning('failed to parse: ' + filepath) def remove_startup_env_files(): if os.path.isdir(IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR): try: shutil.rmtree(IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR) except: warning("remove_startup_env_files: failed to remove "+IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR) if not os.path.exists(IMPORT_ENVIRONMENT_DIR): warning("remove_startup_env_files: "+IMPORT_ENVIRONMENT_DIR+" don't exists") return for subdir, _, files in sorted(os.walk(IMPORT_ENVIRONMENT_DIR)): for file in files: filepath = subdir + os.sep + file if filepath.endswith(ENV_FILES_STARTUP_EXTENSIONS): try: os.remove(filepath) info("Remove file "+filepath) except: warning("remove_startup_env_files: failed to remove "+filepath) def restore_environ(): clear_environ() trace("Restore initial environment") os.environ.update(environ_backup) def clear_environ(): trace("Clear existing environment") os.environ.clear() def set_startup_scripts_env(): debug("Set environment for startup files") clear_run_envvars() # clear previous environment create_run_envvars() # create run envvars with all env files def set_process_env(keep_startup_env = False): debug("Set environment for container process") if not keep_startup_env: remove_startup_env_files() clear_run_envvars() restore_environ() create_run_envvars() # recreate env var without startup env files def setup_run_directories(args): directories = (RUN_PROCESS_DIR, RUN_STARTUP_DIR, RUN_STATE_DIR, RUN_ENVIRONMENT_DIR) for directory in directories: if not os.path.exists(directory): os.makedirs(directory) if directory == RUN_ENVIRONMENT_DIR: os.chmod(directory, 700) if not os.path.exists(RUN_ENVIRONMENT_FILE_EXPORT): open(RUN_ENVIRONMENT_FILE_EXPORT, 'a').close() os.chmod(RUN_ENVIRONMENT_FILE_EXPORT, 640) uid = pwd.getpwnam("root").pw_uid gid = grp.getgrnam("docker_env").gr_gid os.chown(RUN_ENVIRONMENT_FILE_EXPORT, uid, gid) if state_is_first_start(): if args.copy_service: copy_service_to_run_dir() set_dir_env() base_path = os.environ[ENVIRONMENT_SERVICE_DIR_KEY] nb_service = len(listdir(base_path)) if nb_service > 0 : info("Search service in " + ENVIRONMENT_SERVICE_DIR_KEY + " = "+base_path+" :") for d in listdir(base_path): d_path = base_path + os.sep + d if os.path.isdir(d_path): if is_exe(d_path + os.sep + IMPORT_STARTUP_FILENAME): info('link ' + d_path + os.sep + IMPORT_STARTUP_FILENAME + ' to ' + RUN_STARTUP_DIR + os.sep + d) try: os.symlink(d_path + os.sep + IMPORT_STARTUP_FILENAME, RUN_STARTUP_DIR + os.sep + d) except OSError as detail: warning('failed to link ' + d_path + os.sep + IMPORT_STARTUP_FILENAME + ' to ' + RUN_STARTUP_DIR + os.sep + d + ': ' + xstr(detail)) if is_exe(d_path + os.sep + IMPORT_PROCESS_FILENAME): info('link ' + d_path + os.sep + IMPORT_PROCESS_FILENAME + ' to ' + RUN_PROCESS_DIR + os.sep + d + os.sep + 'run') if not os.path.exists(RUN_PROCESS_DIR + os.sep + d): os.makedirs(RUN_PROCESS_DIR + os.sep + d) else: warning('directory ' + RUN_PROCESS_DIR + os.sep + d + ' already exists') try: os.symlink(d_path + os.sep + IMPORT_PROCESS_FILENAME, RUN_PROCESS_DIR + os.sep + d + os.sep + 'run') except OSError as detail: warning('failed to link ' + d_path + os.sep + IMPORT_PROCESS_FILENAME + ' to ' + RUN_PROCESS_DIR + os.sep + d + os.sep + 'run : ' + xstr(detail)) if not args.skip_finish_files and is_exe(d_path + os.sep + IMPORT_FINISH_FILENAME): info('link ' + d_path + os.sep + IMPORT_FINISH_FILENAME + ' to ' + RUN_PROCESS_DIR + os.sep + d + os.sep + 'finish') if not os.path.exists(RUN_PROCESS_DIR + os.sep + d): os.makedirs(RUN_PROCESS_DIR + os.sep + d) try: os.symlink(d_path + os.sep + IMPORT_FINISH_FILENAME, RUN_PROCESS_DIR + os.sep + d + os.sep + 'finish') except OSError as detail: warning('failed to link ' + d_path + os.sep + IMPORT_FINISH_FILENAME + ' to ' + RUN_PROCESS_DIR + os.sep + d + os.sep + 'finish : ' + xstr(detail)) def set_dir_env(): if state_is_service_copied_to_run_dir(): os.environ[ENVIRONMENT_SERVICE_DIR_KEY] = RUN_SERVICE_DIR else: os.environ[ENVIRONMENT_SERVICE_DIR_KEY] = IMPORT_SERVICE_DIR trace("set : " + ENVIRONMENT_SERVICE_DIR_KEY + " = " + os.environ[ENVIRONMENT_SERVICE_DIR_KEY]) os.environ[ENVIRONMENT_STATE_DIR_KEY] = RUN_STATE_DIR trace("set : " + ENVIRONMENT_STATE_DIR_KEY + " = " + os.environ[ENVIRONMENT_STATE_DIR_KEY]) def set_log_level_env(): os.environ[ENVIRONMENT_LOG_LEVEL_KEY] = xstr(log_level) trace("set : "+ENVIRONMENT_LOG_LEVEL_KEY+" = " + os.environ[ENVIRONMENT_LOG_LEVEL_KEY]) def copy_service_to_run_dir(): if os.path.exists(RUN_SERVICE_DIR): warning("Copy "+IMPORT_SERVICE_DIR+" to "+RUN_SERVICE_DIR + " ignored") warning(RUN_SERVICE_DIR + " already exists") return info("Copy "+IMPORT_SERVICE_DIR+" to "+RUN_SERVICE_DIR) try: shutil.copytree(IMPORT_SERVICE_DIR, RUN_SERVICE_DIR) except shutil.Error as e: warning(e) state_set_service_copied_to_run_dir() def state_set_service_copied_to_run_dir(): open(RUN_STATE_DIR+"/service-copied-to-run-dir", 'a').close() def state_is_service_copied_to_run_dir(): return os.path.exists(RUN_STATE_DIR+'/service-copied-to-run-dir') def state_set_first_startup_done(): open(RUN_STATE_DIR+"/first-startup-done", 'a').close() def state_is_first_start(): return os.path.exists(RUN_STATE_DIR+'/first-startup-done') == False def state_set_startup_done(): open(RUN_STATE_DIR+"/startup-done", 'a').close() def state_reset_startup_done(): try: os.remove(RUN_STATE_DIR+"/startup-done") except OSError: pass def is_multiple_process_container(): return len(listdir(RUN_PROCESS_DIR)) > 1 def is_single_process_container(): return len(listdir(RUN_PROCESS_DIR)) == 1 def get_container_process(): for p in listdir(RUN_PROCESS_DIR): return RUN_PROCESS_DIR + os.sep + p + os.sep + 'run' def is_runit_installed(): return os.path.exists('/sbin/sv') _find_unsafe = re.compile(r'[^\w@%+=:,./-]').search def shquote(s): """Return a shell-escaped version of the string *s*.""" if not s: return "''" if _find_unsafe(s) is None: return s # use single quotes, and put single quotes into double quotes # the string $'b is then quoted as '$'"'"'b' return "'" + s.replace("'", "'\"'\"'") + "'" def sanitize_shenvname(s): return re.sub(SHENV_NAME_WHITELIST_REGEX, "_", s) # Waits for the child process with the given PID, while at the same time # reaping any other child processes that have exited (e.g. adopted child # processes that have terminated). def waitpid_reap_other_children(pid): global terminated_child_processes status = terminated_child_processes.get(pid) if status: # A previous call to waitpid_reap_other_children(), # with an argument not equal to the current argument, # already waited for this process. Return the status # that was obtained back then. del terminated_child_processes[pid] return status done = False status = None while not done: try: # https://github.com/phusion/baseimage-docker/issues/151#issuecomment-92660569 this_pid, status = os.waitpid(pid, os.WNOHANG) if this_pid == 0: this_pid, status = os.waitpid(-1, 0) if this_pid == pid: done = True else: # Save status for later. terminated_child_processes[this_pid] = status except OSError as e: if e.errno == errno.ECHILD or e.errno == errno.ESRCH: return None else: raise return status def stop_child_process(name, pid, signo = signal.SIGTERM, time_limit = KILL_PROCESS_TIMEOUT): info("Shutting down %s (PID %d)..." % (name, pid)) try: os.kill(pid, signo) except OSError: pass signal.alarm(time_limit) try: try: waitpid_reap_other_children(pid) except OSError: pass except AlarmException: warning("%s (PID %d) did not shut down in time. Forcing it to exit." % (name, pid)) try: os.kill(pid, signal.SIGKILL) except OSError: pass try: waitpid_reap_other_children(pid) except OSError: pass finally: signal.alarm(0) def run_command_killable(command): status = None debug_env_dump() pid = os.spawnvp(os.P_NOWAIT, command[0], command) try: status = waitpid_reap_other_children(pid) except BaseException: warning("An error occurred. Aborting.") stop_child_process(command[0], pid) raise if status != 0: if status is None: error("%s exited with unknown status\n" % command[0]) else: error("%s failed with status %d\n" % (command[0], os.WEXITSTATUS(status))) sys.exit(1) def run_command_killable_and_import_run_envvars(command): run_command_killable(command) import_run_envvars() export_run_envvars(False) def kill_all_processes(time_limit): info("Killing all processes...") try: os.kill(-1, signal.SIGTERM) except OSError: pass signal.alarm(time_limit) try: # Wait until no more child processes exist. done = False while not done: try: os.waitpid(-1, 0) except OSError as e: if e.errno == errno.ECHILD: done = True else: raise except AlarmException: warning("Not all processes have exited in time. Forcing them to exit.") try: os.kill(-1, signal.SIGKILL) except OSError: pass finally: signal.alarm(0) def container_had_startup_script(): return (len(listdir(RUN_STARTUP_DIR)) > 0 or is_exe(RUN_STARTUP_FINAL_FILE)) def run_startup_files(args): # Run /container/run/startup/* for name in listdir(RUN_STARTUP_DIR): filename = RUN_STARTUP_DIR + os.sep + name if is_exe(filename): info("Running %s..." % filename) run_command_killable_and_import_run_envvars([filename]) # Run /container/run/startup.sh. if is_exe(RUN_STARTUP_FINAL_FILE): info("Running "+RUN_STARTUP_FINAL_FILE+"...") run_command_killable_and_import_run_envvars([RUN_STARTUP_FINAL_FILE]) def wait_for_process_or_interrupt(pid): status = waitpid_reap_other_children(pid) return (True, status) def run_process(args, background_process_name, background_process_command): background_process_pid = run_background_process(background_process_name,background_process_command) background_process_exited = False exit_status = None if len(args.main_command) == 0: background_process_exited, exit_status = wait_background_process(background_process_name, background_process_pid) else: exit_status = run_foreground_process(args.main_command) return background_process_pid, background_process_exited, exit_status def run_background_process(name, command): info("Running "+ name +"...") pid = os.spawnvp(os.P_NOWAIT, command[0], command) debug("%s started as PID %d" % (name, pid)) return pid def wait_background_process(name, pid): exit_code = None exit_status = None process_exited = False process_exited, exit_code = wait_for_process_or_interrupt(pid) if process_exited: if exit_code is None: info(name + " exited with unknown status") exit_status = 1 else: exit_status = os.WEXITSTATUS(exit_code) info("%s exited with status %d" % (name, exit_status)) return (process_exited, exit_status) def run_foreground_process(command): exit_code = None exit_status = None info("Running %s..." % " ".join(command)) pid = os.spawnvp(os.P_NOWAIT, command[0], command) try: exit_code = waitpid_reap_other_children(pid) if exit_code is None: info("%s exited with unknown status." % command[0]) exit_status = 1 else: exit_status = os.WEXITSTATUS(exit_code) info("%s exited with status %d." % (command[0], exit_status)) except KeyboardInterrupt: stop_child_process(command[0], pid) raise except BaseException: error("An error occurred. Aborting.") stop_child_process(command[0], pid) raise return exit_status def shutdown_runit_services(): debug("Begin shutting down runit services...") os.system("/sbin/sv -w %d force-stop %s/* > /dev/null" % (KILL_PROCESS_TIMEOUT, RUN_PROCESS_DIR)) def wait_for_runit_services(): debug("Waiting for runit services to exit...") done = False while not done: done = os.system("/sbin/sv status "+RUN_PROCESS_DIR+"/* | grep -q '^run:'") != 0 if not done: time.sleep(0.1) shutdown_runit_services() def run_multiple_process_container(args): if not is_runit_installed(): error("Error: runit is not installed and this is a multiple process container.") return background_process_exited=False background_process_pid=None try: runit_command=["/sbin/runsvdir", "-P", RUN_PROCESS_DIR] background_process_pid, background_process_exited, exit_status = run_process(args, "runit daemon", runit_command) sys.exit(exit_status) finally: shutdown_runit_services() if not background_process_exited: stop_child_process("runit daemon", background_process_pid) wait_for_runit_services() def run_single_process_container(args): background_process_exited=False background_process_pid=None try: container_process=get_container_process() background_process_pid, background_process_exited, exit_status = run_process(args, container_process, [container_process]) sys.exit(exit_status) finally: if not background_process_exited: stop_child_process(container_process, background_process_pid) def run_no_process_container(args): if len(args.main_command) == 0: args.main_command=['bash'] # run bash by default exit_status = run_foreground_process(args.main_command) sys.exit(exit_status) def run_finish_files(): # iterate process dir to find finish files for name in listdir(RUN_PROCESS_DIR): filename = RUN_PROCESS_DIR + os.sep + name + os.sep + "finish" if is_exe(filename): info("Running %s..." % filename) run_command_killable_and_import_run_envvars([filename]) def wait_states(states): for state in states: filename = RUN_STATE_DIR + os.sep + state info("Wait state: " + state) while not os.path.exists(filename): time.sleep(0.1) debug("Check file " + filename) pass debug("Check file " + filename + " [Ok]") def run_cmds(args, when): debug("Run commands before " + when + "...") if len(args.cmds) > 0: for cmd in args.cmds: if (len(cmd) > 1 and cmd[1] == when) or (len(cmd) == 1 and when == "startup"): info("Running '"+cmd[0]+"'...") run_command_killable_and_import_run_envvars(cmd[0].split()) def main(args): info(ENVIRONMENT_LOG_LEVEL_KEY + " = " + xstr(log_level) + " (" + log_level_switcher_inv.get(log_level) + ")") state_reset_startup_done() if args.set_env_hostname_to_etc_hosts: set_env_hostname_to_etc_hosts() wait_states(args.wait_states) setup_run_directories(args) if not args.skip_env_files: set_startup_scripts_env() run_cmds(args,"startup") if not args.skip_startup_files and container_had_startup_script(): run_startup_files(args) state_set_startup_done() state_set_first_startup_done() if not args.skip_env_files: set_process_env(args.keep_startup_env) run_cmds(args,"process") debug_env_dump() if is_single_process_container() and not args.skip_process_files: run_single_process_container(args) elif is_multiple_process_container() and not args.skip_process_files: run_multiple_process_container(args) else: run_no_process_container(args) # Parse options. parser = argparse.ArgumentParser(description = 'Initialize the system.', epilog='Osixia! Light Baseimage: https://github.com/osixia/docker-light-baseimage') parser.add_argument('main_command', metavar = 'MAIN_COMMAND', type = str, nargs = '*', help = 'The main command to run, leave empty to only run container process.') parser.add_argument('-e', '--skip-env-files', dest = 'skip_env_files', action = 'store_const', const = True, default = False, help = 'Skip getting environment values from environment file(s).') parser.add_argument('-s', '--skip-startup-files', dest = 'skip_startup_files', action = 'store_const', const = True, default = False, help = 'Skip running '+RUN_STARTUP_DIR+'/* and '+RUN_STARTUP_FINAL_FILE + ' file(s).') parser.add_argument('-p', '--skip-process-files', dest = 'skip_process_files', action = 'store_const', const = True, default = False, help = 'Skip running container process file(s).') parser.add_argument('-f', '--skip-finish-files', dest = 'skip_finish_files', action = 'store_const', const = True, default = False, help = 'Skip running container finish file(s).') parser.add_argument('-o', '--run-only', type=str, choices=["startup","process","finish"], dest = 'run_only', default = None, help = 'Run only this file type and ignore others.') parser.add_argument('-c', '--cmd', metavar=('COMMAND', 'WHEN={startup,process,finish}'), dest = 'cmds', type = str, action = 'append', default = [], nargs = "+", help = 'Run COMMAND before WHEN file(s). Default before startup file(s).') parser.add_argument('-k', '--no-kill-all-on-exit', dest = 'kill_all_on_exit', action = 'store_const', const = False, default = True, help = 'Don\'t kill all processes on the system upon exiting.') parser.add_argument('--wait-state', metavar = 'FILENAME', dest = 'wait_states', type = str, action = 'append', default=[], help = 'Wait until the container FILENAME file exists in '+RUN_STATE_DIR+' directory before starting. Usefull when 2 containers share '+RUN_DIR+' directory via volume.') parser.add_argument('--wait-first-startup', dest = 'wait_first_startup', action = 'store_const', const = True, default = False, help = 'Wait until the first startup is done before starting. Usefull when 2 containers share '+RUN_DIR+' directory via volume.') parser.add_argument('--keep-startup-env', dest = 'keep_startup_env', action = 'store_const', const = True, default = False, help = 'Don\'t remove ' + xstr(ENV_FILES_STARTUP_EXTENSIONS) + ' environment files after startup scripts.') parser.add_argument('--copy-service', dest = 'copy_service', action = 'store_const', const = True, default = False, help = 'Copy '+IMPORT_SERVICE_DIR+' to '+RUN_SERVICE_DIR+'. Help to fix docker mounted files problems.') parser.add_argument('--dont-touch-etc-hosts', dest = 'set_env_hostname_to_etc_hosts', action = 'store_const', const = False, default = True, help = 'Don\'t add in /etc/hosts a line with the container ip and $HOSTNAME environment variable value.') parser.add_argument('--keepalive', dest = 'keepalive', action = 'store_const', const = True, default = False, help = 'Keep alive container if all startup files and process exited without error.') parser.add_argument('--keepalive-force', dest = 'keepalive_force', action = 'store_const', const = True, default = False, help = 'Keep alive container in all circonstancies.') parser.add_argument('-l', '--loglevel', type=str, choices=["none","error","warning","info","debug","trace"], dest = 'log_level', default = "info", help = 'Log level (default: info)') args = parser.parse_args() log_level_switcher = {"none": LOG_LEVEL_NONE,"error": LOG_LEVEL_ERROR,"warning": LOG_LEVEL_WARNING,"info": LOG_LEVEL_INFO,"debug": LOG_LEVEL_DEBUG, "trace": LOG_LEVEL_TRACE} log_level_switcher_inv = {LOG_LEVEL_NONE: "none",LOG_LEVEL_ERROR:"error",LOG_LEVEL_WARNING:"warning",LOG_LEVEL_INFO:"info",LOG_LEVEL_DEBUG:"debug",LOG_LEVEL_TRACE:"trace"} log_level = log_level_switcher.get(args.log_level) # Run only arg if args.run_only != None: if args.run_only == "startup" and args.skip_startup_files: error("Error: When '--run-only startup' is set '--skip-startup-files' can't be set.") sys.exit(1) elif args.run_only == "process" and args.skip_startup_files: error("Error: When '--run-only process' is set '--skip-process-files' can't be set.") sys.exit(1) elif args.run_only == "finish" and args.skip_startup_files: error("Error: When '--run-only finish' is set '--skip-finish-files' can't be set.") sys.exit(1) if args.run_only == "startup": args.skip_process_files = True args.skip_finish_files = True elif args.run_only == "process": args.skip_startup_files = True args.skip_finish_files = True elif args.run_only == "finish": args.skip_startup_files = True args.skip_process_files = True # wait for startup args if args.wait_first_startup: args.wait_states.insert(0, 'first-startup-done') # Run main function. signal.signal(signal.SIGTERM, lambda signum, frame: ignore_signals_and_raise_keyboard_interrupt('SIGTERM')) signal.signal(signal.SIGINT, lambda signum, frame: ignore_signals_and_raise_keyboard_interrupt('SIGINT')) signal.signal(signal.SIGALRM, lambda signum, frame: raise_alarm_exception()) exit_code = 0 try: main(args) except SystemExit as err: exit_code = err.code if args.keepalive and err.code == 0: try: info("All process have exited without error, keep container alive...") while True: time.sleep(60) pass except: error("Keep alive process ended.") except KeyboardInterrupt: warning("Init system aborted.") exit(2) finally: run_cmds(args,"finish") # for multiple process images finish script are run by runit if not args.skip_finish_files and not is_multiple_process_container(): run_finish_files() if args.keepalive_force: try: info("All process have exited, keep container alive...") while True: time.sleep(60) pass except: error("Keep alive process ended.") if args.kill_all_on_exit: kill_all_processes(KILL_ALL_PROCESSES_TIMEOUT) exit(exit_code)