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.scripts.default_nodedir import _default_nodedir
7 from allmydata.util import fileutil
8 from allmydata.util.encodingutil import listdir_unicode, quote_local_unicode_path
11 class StartOptions(BasedirOptions):
12 subcommand_name = "start"
14 ("basedir", "C", None, "Specify which Tahoe base directory should be used. This has the same effect as the global --node-directory option. [default: %s]"
15 % quote_local_unicode_path(_default_nodedir)),
18 def parseArgs(self, basedir=None, *twistd_args):
19 # This can't handle e.g. 'tahoe start --nodaemon', since '--nodaemon'
20 # looks like an option to the tahoe subcommand, not to twistd.
21 # So you can either use 'tahoe start' or 'tahoe start NODEDIR --TWISTD-OPTIONS'.
22 # Note that 'tahoe --node-directory=NODEDIR start --TWISTD-OPTIONS' also
23 # isn't allowed, unfortunately.
25 BasedirOptions.parseArgs(self, basedir)
26 self.twistd_args = twistd_args
28 def getSynopsis(self):
29 return "Usage: %s [global-options] %s [options] [NODEDIR [twistd-options]]" % (self.command_name, self.subcommand_name)
31 def getUsage(self, width=None):
32 t = BasedirOptions.getUsage(self, width) + "\n"
33 twistd_options = str(MyTwistdConfig()).partition("\n")[2].partition("\n\n")[0]
34 t += twistd_options.replace("Options:", "twistd-options:", 1)
37 Note that if any twistd-options are used, NODEDIR must be specified explicitly
38 (not by default or using -C/--basedir or -d/--node-directory), and followed by
43 class StopOptions(BasedirOptions):
44 def parseArgs(self, basedir=None):
45 BasedirOptions.parseArgs(self, basedir)
47 def getSynopsis(self):
48 return "Usage: %s [global-options] stop [options] [NODEDIR]" % (self.command_name,)
50 class RestartOptions(StartOptions):
51 subcommand_name = "restart"
53 class RunOptions(StartOptions):
54 subcommand_name = "run"
57 class MyTwistdConfig(twistd.ServerOptions):
58 subCommands = [("StartTahoeNode", None, usage.Options, "node")]
60 class StartTahoeNodePlugin:
62 def __init__(self, nodetype, basedir):
63 self.nodetype = nodetype
64 self.basedir = basedir
65 def makeService(self, so):
66 # delay this import as late as possible, to allow twistd's code to
67 # accept --reactor= selection. N.B.: this can't actually work until
68 # this file, and all the __init__.py files above it, also respect the
69 # prohibition on importing anything that transitively imports
70 # twisted.internet.reactor . That will take a lot of work.
71 if self.nodetype == "client":
72 from allmydata.client import Client
73 return Client(self.basedir)
74 if self.nodetype == "introducer":
75 from allmydata.introducer.server import IntroducerNode
76 return IntroducerNode(self.basedir)
77 if self.nodetype == "key-generator":
78 from allmydata.key_generator import KeyGeneratorService
79 return KeyGeneratorService(default_key_size=2048)
80 if self.nodetype == "stats-gatherer":
81 from allmydata.stats import StatsGathererService
82 return StatsGathererService(verbose=True)
83 raise ValueError("unknown nodetype %s" % self.nodetype)
85 def identify_node_type(basedir):
86 for fn in listdir_unicode(basedir):
87 if fn.endswith(u".tac"):
93 for t in ("client", "introducer", "key-generator", "stats-gatherer"):
98 def start(config, out=sys.stdout, err=sys.stderr):
99 basedir = config['basedir']
100 quoted_basedir = quote_local_unicode_path(basedir)
101 print >>out, "STARTING", quoted_basedir
102 if not os.path.isdir(basedir):
103 print >>err, "%s does not look like a directory at all" % quoted_basedir
105 nodetype = identify_node_type(basedir)
107 print >>err, "%s is not a recognizable node directory" % quoted_basedir
109 # Now prepare to turn into a twistd process. This os.chdir is the point
113 if (nodetype in ("client", "introducer")
114 and "--nodaemon" not in config.twistd_args
115 and "--syslog" not in config.twistd_args
116 and "--logfile" not in config.twistd_args):
117 fileutil.make_dirs(os.path.join(basedir, u"logs"))
118 twistd_args.extend(["--logfile", os.path.join("logs", "twistd.log")])
119 twistd_args.extend(config.twistd_args)
120 twistd_args.append("StartTahoeNode") # point at our StartTahoeNodePlugin
122 twistd_config = MyTwistdConfig()
124 twistd_config.parseOptions(twistd_args)
125 except usage.error, ue:
126 # these arguments were unsuitable for 'twistd'
128 print >>err, "tahoe %s: usage error from twistd: %s\n" % (config.subcommand_name, ue)
130 twistd_config.loadedPlugins = {"StartTahoeNode": StartTahoeNodePlugin(nodetype, basedir)}
132 # On Unix-like platforms:
133 # Unless --nodaemon was provided, the twistd.runApp() below spawns off a
134 # child process, and the parent calls os._exit(0), so there's no way for
135 # us to get control afterwards, even with 'except SystemExit'. If
136 # application setup fails (e.g. ImportError), runApp() will raise an
139 # So if we wanted to do anything with the running child, we'd have two
142 # * fork first, and have our child wait for the runApp() child to get
143 # running. (note: just fork(). This is easier than fork+exec, since we
144 # don't have to get PATH and PYTHONPATH set up, since we're not
145 # starting a *different* process, just cloning a new instance of the
147 # * or have the user run a separate command some time after this one
150 # For Tahoe, we don't need to do anything with the child, so we can just
154 # twistd does not fork; it just runs in the current process whether or not
155 # --nodaemon is specified. (As on Unix, --nodaemon does have the side effect
156 # of causing us to log to stdout/stderr.)
158 if "--nodaemon" in twistd_args or sys.platform == "win32":
163 print >>out, "%s node in %s" % (verb, quoted_basedir)
164 twistd.runApp(twistd_config)
165 # we should only reach here if --nodaemon or equivalent was used
168 def stop(config, out=sys.stdout, err=sys.stderr):
169 basedir = config['basedir']
170 quoted_basedir = quote_local_unicode_path(basedir)
171 print >>out, "STOPPING", quoted_basedir
172 pidfile = os.path.join(basedir, u"twistd.pid")
173 if not os.path.exists(pidfile):
174 print >>err, "%s does not look like a running node directory (no twistd.pid)" % quoted_basedir
175 # we define rc=2 to mean "nothing is running, but it wasn't me who
178 pid = open(pidfile, "r").read()
181 # kill it hard (SIGKILL), delete the twistd.pid file, then wait for the
182 # process itself to go away. If it hasn't gone away after 20 seconds, warn
183 # the user but keep waiting until they give up.
185 os.kill(pid, signal.SIGKILL)
186 except OSError, oserr:
189 # the process didn't exist, so wipe the pid file
196 except EnvironmentError:
203 # poll once per second until we see the process is no longer running
207 print >>out, "process %d is dead" % pid
212 print >>err, ("It looks like pid %d is still running "
213 "after %d seconds" % (pid,
214 (time.time() - start)))
215 print >>err, "I will keep watching it until you interrupt me."
219 print >>err, "pid %d still running after %d seconds" % \
220 (pid, (time.time() - start))
223 # we define rc=1 to mean "I think something is still running, sorry"
226 def restart(config, stdout, stderr):
227 rc = stop(config, stdout, stderr)
229 print >>stderr, "ignoring couldn't-stop"
232 print >>stderr, "not restarting"
234 return start(config, stdout, stderr)
236 def run(config, stdout, stderr):
237 config.twistd_args = config.twistd_args + ("--nodaemon",)
238 # Previously we would do the equivalent of adding ("--logfile", "tahoesvc.log"),
239 # but that redirects stdout/stderr which is often unhelpful, and the user can
240 # add that option explicitly if they want.
242 return start(config, stdout, stderr)
246 ["start", None, StartOptions, "Start a node (of any type)."],
247 ["stop", None, StopOptions, "Stop a node."],
248 ["restart", None, RestartOptions, "Restart a node."],
249 ["run", None, RunOptions, "Run a node synchronously."],