mirror of https://github.com/BOINC/boinc.git
677 lines
20 KiB
Python
Executable File
677 lines
20 KiB
Python
Executable File
#!/usr/bin/env python
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## $Id$
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'''
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A program to start/stop BOINC server daemons and run periodic tasks
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START parses config.xml and runs <daemon> and <task> entries.
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A config.xml file looks like this:
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<boinc>
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<config>
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<host>main_host</host>
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...
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<!-- optional; defaults as indicated: -->
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<project_dir>../</project_dir> <!-- relative to location of "start" -->
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<bin_dir>bin</bin_dir> <!-- relative to project_dir -->
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<cgi_bin_dir>cgi-bin</cgi_dir>
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<log_dir>log</log_dir>
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<pid_dir>pid</pid_dir>
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...
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</config>
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<daemons>
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<daemon>
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[ <host>foobar</host> ]
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<cmd>feeder -d 3</cmd>
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</daemon>
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</daemons>
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<tasks>
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<task>
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[ <host>foobar</host> ]
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<cmd>get_load</cmd>
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<output>get_load.out</output>
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<period>5 min</period>
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</task>
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<task>
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<cmd>echo "HI" | mail quarl</cmd>
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<output>/dev/null</output>
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<period>1 day</period>
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</task>
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</tasks>
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</boinc>
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Tasks:
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These are periodic, short-running jobs.
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CMD and PERIOD are required.
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OUTPUT specifies the file to output and by default is COMMAND_BASE_NAME.out.
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Commands are run in the <bin_dir> directory
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which is a path relative to <project_dir> and output to <log_dir>.
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The main script is "start"; sym-link or hard-link "start" to "stop", "cron".
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Invocation methods:
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--enable (default if invoked as "start")
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Set the project to ENABLED mode and start daemons
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--cron If project is in ENABLED mode start daemons and run tasks;
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else do nothing.
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This command is intended to be run as a real cron job
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every five minutes.
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--disable (default if invoked as "stop")
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Set project to DISABLED mode and stop daemons.
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--status Show status.
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See "start --help" for options.
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Daemons:
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These are continuously-running programs.
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The process ID is recorded in the <pid_dir>
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directory and the process is sent a SIGINT in a DISABLE operation.
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Both tasks and daemons can run on a different host (specified by <host>).
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The default is the project's main host,
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which is specified in config.host
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IMPLEMENTATION:
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Uses a file "run_state_HOST.xml" that records the enabled mode
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and the last run time of periodic tasks on that host.
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Looks like this:
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<?xml version="1.0">
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<boinc>
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<tasks>
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<task>
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<cmd>
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get_load
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</cmd>
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<last_run>
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1070392808.86
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</last_run>
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</task>
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...
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</tasks>
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<enabled>
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1
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</enabled>
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</boinc>
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Daemons:
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Writes a PID to pid_dir_HOST/command.pid.
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Tasks:
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Writes a timestamp to run_state_HOST.xml
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to remember when the task was last run.
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Both:
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A lock file (pid_dir_HOST/command.lock)
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prevents tasks and daemons from being run
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again when they are currently running.
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'''
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import boinc_path_config
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from Boinc import configxml
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import sys, os, getopt, time, glob, fcntl, signal, socket
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verbose = os.isatty(sys.stdout.fileno())
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verbose_daemon_run = 0
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# how long (in seconds) parent should wait before continuing after a fork.
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# this is just a safety measure in case anything doesn't play nice if
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# starting simultaneously. also it keeps output in sequence.
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fork_delay = 0.1
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ignore_timestamps = False
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is_main_host = False
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local_hostname = ''
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def get_host_list():
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'''
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Get a list of hosts mentioned in <host> elements of tasks and daemons
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'''
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hosts = []
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for task in config.tasks:
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host = task.__dict__.get('host')
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if (host and (host not in hosts)):
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hosts.append(host)
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for task in config.daemons:
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host = task.__dict__.get('host')
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if (host and (host not in hosts)):
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hosts.append(host)
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return hosts
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def assign_default_host():
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'''
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Set the "host" attribute of tasks and daemons for which it's not specified
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'''
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for task in config.tasks:
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host = task.__dict__.get('host')
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if not host:
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task.host = config.config.host
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for task in config.daemons:
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host = task.__dict__.get('host')
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if not host:
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task.host = config.config.host
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def get_dir(name):
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return config.config.__dict__.get(name+'_dir') or os.path.join(project_dir,name)
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def ensure_get_dir(name):
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f = get_dir(name)
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ensure_dir(f)
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return f
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def is_daemon(task):
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'''returns true if task is a daemon'''
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return task._name == 'daemon'
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def get_task_command_basename(task):
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return os.path.basename(task.cmd.split()[0])
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def get_task_output_name(task):
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return os.path.join(log_dir,
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task.__dict__.get('output') or get_task_command_basename(task) + '.out')
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def get_daemon_output_name(task):
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return os.path.join(log_dir,
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task.__dict__.get('output') or get_task_command_basename(task) + '.log')
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def get_daemon_pid_name(task):
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return os.path.join(pid_dir,
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task.__dict__.get('pid_file') or get_task_command_basename(task) + '.pid')
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def output_is_file(filename):
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return filename and not filename.startswith('/dev/')
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def get_task_lock_name(task):
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return os.path.join(pid_dir,
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task.__dict__.get('lock_file')
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or (output_is_file(task.__dict__.get('output')) and task.__dict__.get('output')+'.lock')
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or get_task_command_basename(task) + '.lock')
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def ensure_dir(filename):
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try:
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os.mkdir(filename)
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except OSError:
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return
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def timestamp(t = None):
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return time.strftime('%Y/%m/%d %H:%M:%S', time.localtime(t or time.time()))
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def safe_read_int(filename):
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try:
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return int(open(filename).readline().strip())
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except:
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return 0
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def get_stop_trigger_filename():
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return os.path.join(project_dir, 'stop_servers')
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def write_stop_trigger():
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print >>open(get_stop_trigger_filename(),'w'), '<stop/>'
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def remove_stop_trigger():
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if os.path.exists(get_stop_trigger_filename()):
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os.unlink(get_stop_trigger_filename())
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def safe_unlink(filename):
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try:
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os.unlink(filename)
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except OSError, e:
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print "Couldn't unlink %s:"%filename,e
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def redirect(stdout='/dev/null', stderr=None, stdin='/dev/null'):
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'''
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Redirects stdio. The stdin, stdout, and stderr arguments are file names
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that will be opened and be used to replace the standard file descriptors
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in sys.stdin, sys.stdout, and sys.stderr. These arguments are optional
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and default to /dev/null.
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'''
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si = open(stdin, 'r')
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if not stderr: stderr = stdout
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se = open(stderr, 'a+', 0)
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if stdout == stderr:
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so = se
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else:
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so = open(stdout, 'a+')
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# Redirect standard file descriptors.
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os.dup2(si.fileno(), sys.stdin.fileno())
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os.dup2(so.fileno(), sys.stdout.fileno())
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os.dup2(se.fileno(), sys.stderr.fileno())
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def fork():
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''' fork with fork_delay '''
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pid = os.fork()
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if pid:
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time.sleep(fork_delay)
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return pid
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def double_fork():
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'''
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This forks the current process into a daemon using a double-fork.
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Returns 1 for parent, 0 for child.
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See: http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012
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'''
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# this is necessary because otherwise any buffered output would get
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# printed twice after the fork!
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sys.stdout.flush()
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# Do first fork.
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try:
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pid = fork()
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if pid > 0: return 1
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except OSError, e:
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sys.stderr.write("fork #1 failed: (%d) %s\n" % (e.errno, e.strerror))
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sys.exit(1)
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# Decouple from parent environment.
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os.chdir("/")
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os.umask(0)
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os.setsid()
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# Do second fork.
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try:
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pid = os.fork()
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if pid > 0: os._exit(0) # Exit second parent.
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except OSError, e:
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sys.stderr.write("fork #2 failed: (%d) %s\n" % (e.errno, e.strerror))
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os._exit(1)
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return 0
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def write_pid_file(pidfile):
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print >>open(pidfile,'w'), os.getpid()
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def is_pid_running(pid):
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try:
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os.kill(pid,0)
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return True
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except OSError:
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return False
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# if we ever want to use this on windows see:
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# http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65203
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# returns 0 on success, -1 on error
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locks = []
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def lock_file(filename):
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global locks
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file = open(filename,'w')
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locks.append(file)
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try:
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return fcntl.flock(file.fileno(), fcntl.LOCK_EX|fcntl.LOCK_NB)
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except IOError:
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return -1
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def is_lock_file_locked(filename):
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if lock_file(filename):
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return True
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else:
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os.unlink(filename)
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def contains_shell_characters(command):
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return ('"' in command or "'" in command or
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'\\' in command or '|' in command or
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'>' in command)
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def exec_command_string(command):
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args = command.strip().split()
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# set default path for program to <bin_dir>:
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args[0] = os.path.realpath(os.path.join( bin_dir, args[0] ))
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os.chdir(log_dir)
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try:
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if contains_shell_characters(command):
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os.execl('/bin/sh', 'sh', '-c', ' '.join(args))
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else:
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os.execv( args[0], args )
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# on success we don't reach here
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print >>sys.stderr, "Couldn't exec '%s'"%command
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except OSError, e:
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print >>sys.stderr, "Couldn't execute '%s':" %command, e
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os._exit(1)
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def lookup_task_run_state(task):
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for run_state_task in run_state.tasks:
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if run_state_task.cmd == task.cmd:
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return run_state_task
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run_state_task = run_state.tasks.make_node_and_append('task')
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run_state_task.cmd = task.cmd
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run_state_task.last_run = 0
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return run_state_task
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def interpret_period(str):
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''' "5 min" -> 5*60 ; "1 hour" -> 1*60*60; "2" -> 2*60 '''
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s = str.strip().split()
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try:
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num = int(s[0])
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if len(s) == 1:
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return num*60
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if len(s) == 2:
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u = s[1].lower()
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if u.startswith('s'):
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return num
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if u.startswith('m'):
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return num*60
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if u.startswith('h'):
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return num*60*60
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if u.startswith('d'):
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return num*60*60*24
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if u.startswith('w'):
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return num*60*60*24*7
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if u.startswith('mo'):
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return num*60*60*24*30
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except ValueError:
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pass
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raise SystemExit('Invalid task period "%s"'%str)
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def when_will_task_next_run(task, task_run_state):
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return float(task_run_state.last_run) + interpret_period(task.period)
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def time_to_run_task(task, task_run_state):
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return (ignore_timestamps
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or (time.time() >= when_will_task_next_run(task,task_run_state)))
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def update_task_timestamp(task_run_state):
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task_run_state.last_run = time.time()
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def run_task(task):
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'''Fork and exec command without stdout/err redirection'''
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task_run_state = lookup_task_run_state(task)
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if not time_to_run_task(task, task_run_state):
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if verbose:
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print " Not running task because not time yet:",task.cmd
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return
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if verbose:
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print " Running task:", task.cmd
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update_task_timestamp(task_run_state)
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# we don't need the full double-fork because this should finish quickly
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if fork() > 0: return
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if lock_file(get_task_lock_name(task)):
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print >>sys.stderr, " Task currently running! (%s)"%task.cmd
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sys.exit(1)
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redirect(get_task_output_name(task))
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exec_command_string(task.cmd)
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def run_daemon(task):
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'''Double-fork and exec command with stdout/err redirection and pid writing'''
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if double_fork() > 0: return
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if lock_file(get_task_lock_name(task)):
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if verbose:
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print >>sys.stderr, " Daemon already running:",task.cmd
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sys.exit(0)
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if verbose or verbose_daemon_run:
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print " Starting daemon:", task.cmd
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sys.stdout.flush()
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redirect(get_daemon_output_name(task))
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write_pid_file(get_daemon_pid_name(task))
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print "[%s] Executing command:"%timestamp(), task.cmd
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sys.stdout.flush()
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exec_command_string(task.cmd)
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def run_daemons():
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if verbose: print "Starting daemons"
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if is_main_host:
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remove_stop_trigger()
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for task in config.daemons:
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if task.host != local_hostname:
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continue;
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run_daemon(task)
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def run_tasks():
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if verbose: print "Running tasks"
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for task in config.tasks:
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if task.host != local_hostname:
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continue;
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run_task(task)
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def stop_daemon(pid):
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'''returns 1 if something stopped, else 0'''
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try:
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os.kill(pid, signal.SIGINT)
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except OSError, e:
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if e.errno != 3:
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print >>sys.stderr, "Warning: couldn't kill pid %d:"%pid, e
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return 0
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if verbose:
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print " Killed process", pid
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return 1
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def wait_for_process_to_end(pid):
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'''if process is still running, wait for it to end.'''
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if is_pid_running(pid):
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if verbose:
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print " Waiting for process",pid,"to end: ",
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sys.stdout.flush()
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while is_pid_running(pid):
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if verbose:
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sys.stdout.write('.')
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sys.stdout.flush()
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time.sleep(.5)
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if verbose:
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print ' ok'
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def stop_daemons():
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if verbose: print "Stopping all daemons"
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write_stop_trigger()
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pid_files = glob.glob(os.path.join(pid_dir, '*.pid'))
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count = 0
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pids = map(safe_read_int, pid_files)
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map(safe_unlink, pid_files)
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for pid in pids:
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count += stop_daemon(pid)
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for pid in pids:
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wait_for_process_to_end(pid)
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if verbose:
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if not count:
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print " (No processes stopped)"
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######################################################################
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## command (action) functions:
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def command_enable_start():
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if verbose:
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if run_state.enabled:
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print "Staying in ENABLED mode"
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else:
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print "Entering ENABLED mode"
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run_state.enabled = True
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run_daemons()
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def command_cron_start():
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if verbose: print "Verbose cron-start: status ==", (run_state.enabled and 'ENABLED' or 'DISABLED')
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if run_state.enabled:
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global verbose_daemon_run
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verbose_daemon_run = 1
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run_daemons()
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run_tasks()
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def command_disable_stop():
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if verbose:
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if run_state.enabled:
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print "Entering DISABLED mode"
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else:
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print "Staying in DISABLED mode"
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run_state.enabled = True
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run_state.enabled = False
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stop_daemons()
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def command_status():
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if run_state.enabled:
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print "BOINC is ENABLED"
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else:
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print "BOINC is DISABLED"
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if verbose:
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print
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print "DAEMON pid status lock file commandline"
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n = 0
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for task in config.daemons:
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if task.host != local_hostname:
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continue;
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n += 1
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pid = safe_read_int(get_daemon_pid_name(task)) or 0
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if not pid:
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rs = " "
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elif is_pid_running(pid):
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rs = " running "
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else:
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rs = "NOT FOUND"
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if is_lock_file_locked(get_task_lock_name(task)):
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lu = " locked "
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else:
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lu = "UNLOCKED"
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print " %2d"%n, " %5d"%pid, rs, lu, " ", task.cmd
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print
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print "TASK last run period next run lock file commandline"
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n = 0
|
|
for task in config.tasks:
|
|
if task.host != local_hostname:
|
|
continue;
|
|
n += 1
|
|
task_run_state = lookup_task_run_state(task)
|
|
when_last_run = float(task_run_state.last_run)
|
|
last_run = when_last_run and timestamp(when_last_run) or '?'
|
|
when_next_run = when_will_task_next_run(task, lookup_task_run_state(task))
|
|
next_run = (when_next_run <=time.time()) and 'NOW' or timestamp(when_next_run)
|
|
if is_lock_file_locked(get_task_lock_name(task)):
|
|
lu = " LOCKED "
|
|
else:
|
|
lu = "unlocked"
|
|
print " %2d"%n, last_run.center(20), task.period.ljust(10), \
|
|
next_run.center(20), lu, " ", task.cmd
|
|
pass
|
|
|
|
def command_show_config():
|
|
# TODO: - all config items (e.g. where's logdir?)
|
|
raise SystemExit('TODO')
|
|
|
|
# ------------- main program begins here ---------------------
|
|
|
|
local_hostname = socket.gethostname()
|
|
print '-------- start ---------'
|
|
print 'local hostname: ', local_hostname
|
|
cwd = os.getcwd()
|
|
program_name = os.path.basename(sys.argv[0])
|
|
if program_name == 'start':
|
|
command = command_enable_start
|
|
elif program_name == 'stop':
|
|
command = command_disable_stop
|
|
elif program_name == 'status':
|
|
command = command_status
|
|
else:
|
|
command = None
|
|
|
|
def help():
|
|
print >>sys.stderr, "Syntax: %s [options] [command]" % sys.argv[0]
|
|
print >>sys.stderr, """ Starts or stops BOINC daemons and tasks.
|
|
|
|
Commands:
|
|
--enable (-e) Set BOINC to ENABLED mode and start daemons
|
|
--cron (-c) If ENABLED, start daemons and run tasks
|
|
Intended to be run from real cron every 5 min.
|
|
--disable (-d) Set BOINC to DISABLED mode and stop daemons
|
|
--status (-s) Show status.
|
|
--show-config Show configuration
|
|
|
|
Options:
|
|
--quiet (-q) Operate quietly, even if STDOUT is a tty.
|
|
--verbose (-v) Operate verbosely, even if STDOUT is not a tty.
|
|
|
|
--config-file= Use specified file instead of program-path/../config.xml
|
|
--run-state-file= Use specified file instead of program-path/../run_state.xml
|
|
--fork-delay= Seconds to sleep between daemon forks instead of 0.1
|
|
--ignore-timestamps Ignore timestamps; for cron mode, runs all tasks now
|
|
"""
|
|
if program_name == 'start':
|
|
print >>sys.stderr, "Based on the invocation name as `start', the default action is --enable."
|
|
elif program_name == 'stop':
|
|
print >>sys.stderr, "Based on the invocation name as `stop', the default action is --disable."
|
|
sys.exit(1)
|
|
|
|
program_path = os.path.realpath(os.path.dirname(sys.argv[0]))
|
|
config_filename = os.path.realpath(os.path.join(program_path, '../config.xml'))
|
|
run_state_filename = os.path.realpath(os.path.join(program_path, '../run_state_'+local_hostname+'.xml'))
|
|
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:], 'cedskqvh?',
|
|
('enable', 'cron', 'disable',
|
|
'start', 'stop', 'kill', 'status',
|
|
'show-config',
|
|
'ignore-timestamps',
|
|
'fork-delay=',
|
|
'config-file=', 'run-state-file=',
|
|
'quiet', 'verbose', 'help'))
|
|
except Exception, e:
|
|
print >>sys.stderr, e
|
|
print >>sys.stderr, "Use '%s --help' for help" % sys.argv[0]
|
|
sys.exit(1)
|
|
for opt,v in opts:
|
|
if opt == '-q' or opt == '--quiet':
|
|
verbose = 0
|
|
elif opt == '-v' or opt == '--verbose':
|
|
verbose = 1
|
|
elif opt == '-h' or opt == '--help' or opt == '-?':
|
|
help()
|
|
elif opt == '-e' or opt == '--enable' or opt == '--start':
|
|
command = command_enable_start
|
|
elif opt == '-c' or opt == '--cron':
|
|
command = command_cron_start
|
|
elif opt == '-d' or opt == '--disable' or opt == '--stop' or opt == '-k' or opt == '--kill':
|
|
command = command_disable_stop
|
|
elif opt == '-s' or opt == '--status':
|
|
command = command_status
|
|
elif opt == '--show-config':
|
|
command = command_show_config
|
|
elif opt == '--ignore-timestamps':
|
|
ignore_timestamps = True
|
|
elif opt == '--config-file':
|
|
config_filename = v
|
|
elif opt == '--run-state-file':
|
|
run_state_filename = v
|
|
elif opt == '--fork-delay':
|
|
fork_delay = v
|
|
else: assert(False)
|
|
|
|
if not command:
|
|
raise SystemExit('No command specified and script name is not "start", "stop", or "status"')
|
|
|
|
config = configxml.ConfigFile(config_filename).read()
|
|
run_state = configxml.RunStateFile(run_state_filename).read(failopen_ok = True)
|
|
|
|
project_dir = os.path.realpath(config.config.__dict__.get('project_dir') or
|
|
os.path.join(program_path, '../'))
|
|
os.chdir(project_dir)
|
|
bin_dir = get_dir('bin')
|
|
cgi_bin_dir = get_dir('cgi_bin')
|
|
log_dir = ensure_get_dir('log_'+local_hostname)
|
|
pid_dir = ensure_get_dir('pid_'+local_hostname)
|
|
|
|
print 'default host: ', config.config.host
|
|
is_main_host = config.config.host == local_hostname
|
|
|
|
start_lockfile = os.path.join(pid_dir, 'start.lock.'+local_hostname)
|
|
if lock_file(start_lockfile):
|
|
print >>sys.stderr, "start is currently running!"
|
|
sys.exit(1)
|
|
|
|
assign_default_host()
|
|
apply(command)
|
|
run_state.write()
|
|
|
|
if (is_main_host):
|
|
other_hosts = get_host_list()
|
|
for host in other_hosts:
|
|
if host == local_hostname:
|
|
continue
|
|
local_cmd = ' '.join(sys.argv);
|
|
remote_cmd = 'ssh '+host+' "cd '+cwd+';'+local_cmd+'"'
|
|
print 'running ', remote_cmd
|
|
os.execl('/bin/sh', 'sh', '-c', remote_cmd)
|
|
|
|
os.unlink(start_lockfile)
|