2 import os, sys, signal, time
3 from allmydata.scripts.common import BasedirOptions
4 from twisted.scripts import twistd
5 from twisted.python import usage
6 from allmydata.util import fileutil
7 from allmydata.util.encodingutil import listdir_unicode, quote_local_unicode_path
10 class StartOptions(BasedirOptions):
11 subcommand_name = "start"
13 def parseArgs(self, basedir=None, *twistd_args):
14 # This can't handle e.g. 'tahoe start --nodaemon', since '--nodaemon'
15 # looks like an option to the tahoe subcommand, not to twistd.
16 # So you can either use 'tahoe start' or 'tahoe start NODEDIR --TWISTD-OPTIONS'.
17 # Note that 'tahoe --node-directory=NODEDIR start --TWISTD-OPTIONS' also
18 # isn't allowed, unfortunately.
20 BasedirOptions.parseArgs(self, basedir)
21 self.twistd_args = twistd_args
23 def getSynopsis(self):
24 return "Usage: %s [global-opts] %s [options] [NODEDIR [twistd-options]]" % (self.command_name, self.subcommand_name)
26 def getUsage(self, width=None):
27 t = BasedirOptions.getUsage(self, width) + "\n"
28 twistd_options = str(MyTwistdConfig()).partition("\n")[2].partition("\n\n")[0]
29 t += twistd_options.replace("Options:", "twistd-options:", 1)
32 Note that if any twistd-options are used, NODEDIR must be specified explicitly
33 (not by default or using -C/--basedir or -d/--node-directory), and followed by
38 class StopOptions(BasedirOptions):
39 def parseArgs(self, basedir=None):
40 BasedirOptions.parseArgs(self, basedir)
42 def getSynopsis(self):
43 return "Usage: %s [global-opts] stop [options] [NODEDIR]" % (self.command_name,)
45 class RestartOptions(StartOptions):
46 subcommand_name = "restart"
48 class RunOptions(StartOptions):
49 subcommand_name = "run"
52 class MyTwistdConfig(twistd.ServerOptions):
53 subCommands = [("StartTahoeNode", None, usage.Options, "node")]
55 class StartTahoeNodePlugin:
57 def __init__(self, nodetype, basedir):
58 self.nodetype = nodetype
59 self.basedir = basedir
60 def makeService(self, so):
61 # delay this import as late as possible, to allow twistd's code to
62 # accept --reactor= selection. N.B.: this can't actually work until
63 # this file, and all the __init__.py files above it, also respect the
64 # prohibition on importing anything that transitively imports
65 # twisted.internet.reactor . That will take a lot of work.
66 if self.nodetype == "client":
67 from allmydata.client import Client
68 return Client(self.basedir)
69 if self.nodetype == "introducer":
70 from allmydata.introducer.server import IntroducerNode
71 return IntroducerNode(self.basedir)
72 if self.nodetype == "key-generator":
73 from allmydata.key_generator import KeyGeneratorService
74 return KeyGeneratorService(default_key_size=2048)
75 if self.nodetype == "stats-gatherer":
76 from allmydata.stats import StatsGathererService
77 return StatsGathererService(verbose=True)
78 raise ValueError("unknown nodetype %s" % self.nodetype)
80 def identify_node_type(basedir):
81 for fn in listdir_unicode(basedir):
82 if fn.endswith(u".tac"):
88 for t in ("client", "introducer", "key-generator", "stats-gatherer"):
93 def start(config, out=sys.stdout, err=sys.stderr):
94 basedir = config['basedir']
95 quoted_basedir = quote_local_unicode_path(basedir)
96 print >>out, "STARTING", quoted_basedir
97 if not os.path.isdir(basedir):
98 print >>err, "%s does not look like a directory at all" % quoted_basedir
100 nodetype = identify_node_type(basedir)
102 print >>err, "%s is not a recognizable node directory" % quoted_basedir
104 # Now prepare to turn into a twistd process. This os.chdir is the point
108 if (nodetype in ("client", "introducer")
109 and "--nodaemon" not in config.twistd_args
110 and "--syslog" not in config.twistd_args
111 and "--logfile" not in config.twistd_args):
112 fileutil.make_dirs(os.path.join(basedir, u"logs"))
113 twistd_args.extend(["--logfile", os.path.join("logs", "twistd.log")])
114 twistd_args.extend(config.twistd_args)
115 twistd_args.append("StartTahoeNode") # point at our StartTahoeNodePlugin
117 twistd_config = MyTwistdConfig()
119 twistd_config.parseOptions(twistd_args)
120 except usage.error, ue:
121 # these arguments were unsuitable for 'twistd'
123 print >>err, "tahoe %s: usage error from twistd: %s\n" % (config.subcommand_name, ue)
125 twistd_config.loadedPlugins = {"StartTahoeNode": StartTahoeNodePlugin(nodetype, basedir)}
127 # On Unix-like platforms:
128 # Unless --nodaemon was provided, the twistd.runApp() below spawns off a
129 # child process, and the parent calls os._exit(0), so there's no way for
130 # us to get control afterwards, even with 'except SystemExit'. If
131 # application setup fails (e.g. ImportError), runApp() will raise an
134 # So if we wanted to do anything with the running child, we'd have two
137 # * fork first, and have our child wait for the runApp() child to get
138 # running. (note: just fork(). This is easier than fork+exec, since we
139 # don't have to get PATH and PYTHONPATH set up, since we're not
140 # starting a *different* process, just cloning a new instance of the
142 # * or have the user run a separate command some time after this one
145 # For Tahoe, we don't need to do anything with the child, so we can just
149 # twistd does not fork; it just runs in the current process whether or not
150 # --nodaemon is specified. (As on Unix, --nodaemon does have the side effect
151 # of causing us to log to stdout/stderr.)
153 if "--nodaemon" in twistd_args or sys.platform == "win32":
158 print >>out, "%s node in %s" % (verb, quoted_basedir)
159 twistd.runApp(twistd_config)
160 # we should only reach here if --nodaemon or equivalent was used
163 def stop(config, out=sys.stdout, err=sys.stderr):
164 basedir = config['basedir']
165 quoted_basedir = quote_local_unicode_path(basedir)
166 print >>out, "STOPPING", quoted_basedir
167 pidfile = os.path.join(basedir, u"twistd.pid")
168 if not os.path.exists(pidfile):
169 print >>err, "%s does not look like a running node directory (no twistd.pid)" % quoted_basedir
170 # we define rc=2 to mean "nothing is running, but it wasn't me who
173 pid = open(pidfile, "r").read()
176 # kill it hard (SIGKILL), delete the twistd.pid file, then wait for the
177 # process itself to go away. If it hasn't gone away after 20 seconds, warn
178 # the user but keep waiting until they give up.
180 os.kill(pid, signal.SIGKILL)
181 except OSError, oserr:
184 # the process didn't exist, so wipe the pid file
191 except EnvironmentError:
198 # poll once per second until we see the process is no longer running
202 print >>out, "process %d is dead" % pid
207 print >>err, ("It looks like pid %d is still running "
208 "after %d seconds" % (pid,
209 (time.time() - start)))
210 print >>err, "I will keep watching it until you interrupt me."
214 print >>err, "pid %d still running after %d seconds" % \
215 (pid, (time.time() - start))
218 # we define rc=1 to mean "I think something is still running, sorry"
221 def restart(config, stdout, stderr):
222 rc = stop(config, stdout, stderr)
224 print >>stderr, "ignoring couldn't-stop"
227 print >>stderr, "not restarting"
229 return start(config, stdout, stderr)
231 def run(config, stdout, stderr):
232 config.twistd_args = config.twistd_args + ("--nodaemon",)
233 # Previously we would do the equivalent of adding ("--logfile", "tahoesvc.log"),
234 # but that redirects stdout/stderr which is often unhelpful, and the user can
235 # add that option explicitly if they want.
237 return start(config, stdout, stderr)
241 ["start", None, StartOptions, "Start a node (of any type)."],
242 ["stop", None, StopOptions, "Stop a node."],
243 ["restart", None, RestartOptions, "Restart a node."],
244 ["run", None, RunOptions, "Run a node synchronously."],