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@@ -0,0 +1,936 @@
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+#!/usr/bin/python3 -u
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+# -*- coding: utf-8 -*-
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+
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+import os, os.path, sys, stat, signal, errno, argparse, time, json, re, yaml, ast, socket, shutil, pwd, grp
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+from datetime import datetime
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+
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+KILL_PROCESS_TIMEOUT = int(os.environ.get('KILL_PROCESS_TIMEOUT', 30))
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+KILL_ALL_PROCESSES_TIMEOUT = int(os.environ.get('KILL_ALL_PROCESSES_TIMEOUT', 30))
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+
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+LOG_LEVEL_NONE = 0
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+LOG_LEVEL_ERROR = 1
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+LOG_LEVEL_WARNING = 2
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+LOG_LEVEL_INFO = 3
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+LOG_LEVEL_DEBUG = 4
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+LOG_LEVEL_TRACE = 5
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+
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+SHENV_NAME_WHITELIST_REGEX = re.compile('\W')
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+
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+log_level = None
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+
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+environ_backup = dict(os.environ)
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+terminated_child_processes = {}
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+
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+IMPORT_STARTUP_FILENAME="startup.sh"
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+IMPORT_PROCESS_FILENAME="process.sh"
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+IMPORT_FINISH_FILENAME="finish.sh"
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+
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+IMPORT_ENVIRONMENT_DIR="/container/environment"
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+IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR="/container/environment/startup"
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+
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+ENV_FILES_YAML_EXTENSIONS = ('.yaml', '.startup.yaml')
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+ENV_FILES_JSON_EXTENSIONS = ('.json', '.startup.json')
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+ENV_FILES_STARTUP_EXTENSIONS = ('.startup.yaml', '.startup.json')
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+
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+IMPORT_SERVICE_DIR="/container/service"
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+
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+RUN_DIR="/container/run"
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+RUN_STATE_DIR = RUN_DIR + "/state"
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+RUN_ENVIRONMENT_DIR = RUN_DIR + "/environment"
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+RUN_ENVIRONMENT_FILE_EXPORT = RUN_DIR + "/environment.sh"
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+RUN_STARTUP_DIR = RUN_DIR + "/startup"
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+RUN_STARTUP_FINAL_FILE = RUN_DIR + "/startup.sh"
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+RUN_PROCESS_DIR = RUN_DIR + "/process"
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+RUN_SERVICE_DIR = RUN_DIR + "/service"
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+
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+ENVIRONMENT_LOG_LEVEL_KEY = 'CONTAINER_LOG_LEVEL'
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+ENVIRONMENT_SERVICE_DIR_KEY = 'CONTAINER_SERVICE_DIR'
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+ENVIRONMENT_STATE_DIR_KEY = 'CONTAINER_STATE_DIR'
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+
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+class AlarmException(Exception):
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+ pass
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+
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+def write_log(level, message):
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+ now = datetime.now()
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+ for line in message.splitlines():
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+ sys.stderr.write("*** %s | %s | %s\n" % (level, now.strftime("%Y-%m-%d %H:%M:%S"), line))
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+
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+def error(message):
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+ if log_level >= LOG_LEVEL_ERROR:
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+ write_log(" ERROR ", message)
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+
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+def warning(message):
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+ if log_level >= LOG_LEVEL_WARNING:
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+ write_log("WARNING", message)
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+
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+def info(message):
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+ if log_level >= LOG_LEVEL_INFO:
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+ write_log(" INFO ", message)
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+
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+def debug(message):
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+ if log_level >= LOG_LEVEL_DEBUG:
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+ write_log(" DEBUG ", message)
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+
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+def trace(message):
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+ if log_level >= LOG_LEVEL_TRACE:
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+ write_log(" TRACE ", message)
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+
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+def debug_env_dump():
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+ debug("------------ Environment dump ------------")
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+ for name, value in list(os.environ.items()):
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+ debug(name + " = " + value)
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+ debug("------------------------------------------")
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+
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+def ignore_signals_and_raise_keyboard_interrupt(signame):
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+ signal.signal(signal.SIGTERM, signal.SIG_IGN)
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+ signal.signal(signal.SIGINT, signal.SIG_IGN)
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+ raise KeyboardInterrupt(signame)
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+
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+def raise_alarm_exception():
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+ raise AlarmException('Alarm')
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+
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+def listdir(path):
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+ try:
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+ result = os.stat(path)
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+ except OSError:
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+ return []
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+ if stat.S_ISDIR(result.st_mode):
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+ return sorted(os.listdir(path))
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+ else:
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+ return []
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+
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+def is_exe(path):
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+ try:
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+ return os.path.isfile(path) and os.access(path, os.X_OK)
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+ except OSError:
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+ return False
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+
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+def xstr(s):
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+ if s is None:
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+ return ''
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+ return str(s)
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+
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+def set_env_hostname_to_etc_hosts():
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+ try:
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+ if "HOSTNAME" in os.environ:
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+ socket_hostname = socket.gethostname()
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+
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+ if os.environ["HOSTNAME"] != socket_hostname:
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+ ip_address = socket.gethostbyname(socket_hostname)
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+ with open("/etc/hosts", "a") as myfile:
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+ myfile.write(ip_address+" "+os.environ["HOSTNAME"]+"\n")
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+ except:
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+ warning("set_env_hostname_to_etc_hosts: failed at some point...")
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+
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+def python_dict_to_bash_envvar(name, python_dict):
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+
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+ for value in python_dict:
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+ python_to_bash_envvar(name+"_KEY", value)
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+ python_to_bash_envvar(name+"_VALUE", python_dict.get(value))
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+
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+ values = "#COMPLEX_BASH_ENV:ROW: "+name+"_KEY "+name+"_VALUE"
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+ os.environ[name] = xstr(values)
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+ trace("python2bash : set : " + name + " = "+ os.environ[name])
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+
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+def python_list_to_bash_envvar(name, python_list):
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+
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+ values="#COMPLEX_BASH_ENV:TABLE:"
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+
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+ i=1
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+ for value in python_list:
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+ child_name = name + "_ROW_" + str(i)
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+ values += " " + child_name
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+ python_to_bash_envvar(child_name, value)
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+ i = i +1
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+
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+ os.environ[name] = xstr(values)
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+ trace("python2bash : set : " + name + " = "+ os.environ[name])
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+
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+def python_to_bash_envvar(name, value):
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+
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+ try:
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+ value = ast.literal_eval(value)
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+ except:
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+ pass
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+
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+ if isinstance(value, list):
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+ python_list_to_bash_envvar(name,value)
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+
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+ elif isinstance(value, dict):
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+ python_dict_to_bash_envvar(name,value)
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+
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+ else:
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+ os.environ[name] = xstr(value)
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+ trace("python2bash : set : " + name + " = "+ os.environ[name])
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+
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+def decode_python_envvars():
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+ _environ = dict(os.environ)
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+ for name, value in list(_environ.items()):
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+ if value.startswith("#PYTHON2BASH:") :
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+ value = value.replace("#PYTHON2BASH:","",1)
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+ python_to_bash_envvar(name, value)
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+
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+def decode_json_envvars():
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+ _environ = dict(os.environ)
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+ for name, value in list(_environ.items()):
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+ if value.startswith("#JSON2BASH:") :
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+ value = value.replace("#JSON2BASH:","",1)
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+ try:
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+ value = json.loads(value)
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+ python_to_bash_envvar(name,value)
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+ except:
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+ os.environ[name] = xstr(value)
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+ warning("failed to parse : " + xstr(value))
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+ trace("set : " + name + " = "+ os.environ[name])
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+
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+def decode_envvars():
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+ decode_json_envvars()
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+ decode_python_envvars()
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+
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+def generic_import_envvars(path, override_existing_environment):
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+ if not os.path.exists(path):
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+ trace("generic_import_envvars "+ path+ " don't exists")
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+ return
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+ new_env = {}
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+ for envfile in listdir(path):
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+ filePath = path + os.sep + envfile
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+ if os.path.isfile(filePath) and "." not in envfile:
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+ name = os.path.basename(envfile)
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+ with open(filePath, "r") as f:
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+ # Text files often end with a trailing newline, which we
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+ # don't want to include in the env variable value. See
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+ # https://github.com/phusion/baseimage-docker/pull/49
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+ value = re.sub('\n\Z', '', f.read())
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+ new_env[name] = value
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+ trace("import " + name + " from " + filePath)
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+
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+ for name, value in list(new_env.items()):
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+ if override_existing_environment or name not in os.environ:
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+ os.environ[name] = value
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+ trace("set : " + name + " = "+ os.environ[name])
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+ else:
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+ debug("ignore : " + name + " = " + xstr(value) + " (keep " + name + " = " + os.environ[name] + " )")
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+
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+def import_run_envvars():
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+ clear_environ()
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+ generic_import_envvars(RUN_ENVIRONMENT_DIR, True)
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+
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+def import_envvars():
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+ generic_import_envvars(IMPORT_ENVIRONMENT_DIR, False)
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+ generic_import_envvars(IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR, False)
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+
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+def export_run_envvars(to_dir = True):
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+ if to_dir and not os.path.exists(RUN_ENVIRONMENT_DIR):
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+ warning("export_run_envvars: "+RUN_ENVIRONMENT_DIR+" don't exists")
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+ return
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+ shell_dump = ""
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+ for name, value in list(os.environ.items()):
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+ if name in ['USER', 'GROUP', 'UID', 'GID', 'SHELL']:
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+ continue
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+ if to_dir:
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+ with open(RUN_ENVIRONMENT_DIR + os.sep + name, "w") as f:
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+ f.write(value)
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+ trace("export " + name + " to " + RUN_ENVIRONMENT_DIR + os.sep + name)
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+ shell_dump += "export " + sanitize_shenvname(name) + "=" + shquote(value) + "\n"
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+
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+ with open(RUN_ENVIRONMENT_FILE_EXPORT, "w") as f:
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+ f.write(shell_dump)
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+ trace("export "+RUN_ENVIRONMENT_FILE_EXPORT)
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+
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+def create_run_envvars():
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+ set_dir_env()
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+ set_log_level_env()
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+ import_envvars()
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+ import_env_files()
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+ decode_envvars()
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+ export_run_envvars()
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+
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+def clear_run_envvars():
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+ try:
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+ shutil.rmtree(RUN_ENVIRONMENT_DIR)
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+ os.makedirs(RUN_ENVIRONMENT_DIR)
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+ os.chmod(RUN_ENVIRONMENT_DIR, 700)
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+ except:
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+ warning("clear_run_envvars: failed at some point...")
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+
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+def print_env_files_order(file_extensions):
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+
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+ if not os.path.exists(IMPORT_ENVIRONMENT_DIR):
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+ warning("print_env_files_order "+IMPORT_ENVIRONMENT_DIR+" don't exists")
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+ return
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+
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+ to_print = 'Caution: previously defined variables will not be overriden.\n'
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+
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+ file_found = False
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+ for subdir, _, files in sorted(os.walk(IMPORT_ENVIRONMENT_DIR)):
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+ for file in files:
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+ filepath = subdir + os.sep + file
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+ if filepath.endswith(file_extensions):
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+ file_found = True
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+ filepath = subdir + os.sep + file
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+ to_print += filepath + '\n'
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+
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+ if file_found:
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+ if log_level < LOG_LEVEL_DEBUG:
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+ to_print+='\nTo see how this files are processed and environment variables values,\n'
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+ to_print+='run this container with \'--loglevel debug\''
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+
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+ info('Environment files will be proccessed in this order : \n' + to_print)
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+
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+def import_env_files():
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+
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+ if not os.path.exists(IMPORT_ENVIRONMENT_DIR):
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+ warning("import_env_files: "+IMPORT_ENVIRONMENT_DIR+" don't exists")
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+ return
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+
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+ file_extensions = ENV_FILES_YAML_EXTENSIONS + ENV_FILES_JSON_EXTENSIONS
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+ print_env_files_order(file_extensions)
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+
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+ for subdir, _, files in sorted(os.walk(IMPORT_ENVIRONMENT_DIR)):
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+ for file in files:
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+ if file.endswith(file_extensions):
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+ filepath = subdir + os.sep + file
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+
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+ try:
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+ with open(filepath, "r") as f:
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+
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+ debug("process environment file : " + filepath)
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+
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+ if file.endswith(ENV_FILES_YAML_EXTENSIONS):
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+ env_vars = yaml.load(f)
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+
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+ elif file.endswith(ENV_FILES_JSON_EXTENSIONS):
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+ env_vars = json.load(f)
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+
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+ for name, value in list(env_vars.items()):
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+ if not name in os.environ:
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+ if isinstance(value, list) or isinstance(value, dict):
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+ os.environ[name] = '#PYTHON2BASH:' + xstr(value)
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+ else:
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+ os.environ[name] = xstr(value)
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+ trace("set : " + name + " = "+ os.environ[name])
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+ else:
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+ debug("ignore : " + name + " = " + xstr(value) + " (keep " + name + " = " + os.environ[name] + " )")
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+ except:
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+ warning('failed to parse: ' + filepath)
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+
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+def remove_startup_env_files():
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+
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+ if os.path.isdir(IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR):
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+ try:
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+ shutil.rmtree(IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR)
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+ except:
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+ warning("remove_startup_env_files: failed to remove "+IMPORT_FIRST_STARTUP_ENVIRONMENT_DIR)
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+
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+ if not os.path.exists(IMPORT_ENVIRONMENT_DIR):
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+ warning("remove_startup_env_files: "+IMPORT_ENVIRONMENT_DIR+" don't exists")
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+ return
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+
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+ for subdir, _, files in sorted(os.walk(IMPORT_ENVIRONMENT_DIR)):
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+ for file in files:
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+ filepath = subdir + os.sep + file
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+ if filepath.endswith(ENV_FILES_STARTUP_EXTENSIONS):
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|
|
+ 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)
|