From 11340de05b7a94583b7f1a5b4916001ea213b402 Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Fri, 16 Nov 2018 09:33:28 +0000 Subject: oeqa/utils/httpserver: Rework to avoid hangs and improve logging testimage.bbclass installs a SIGTERM handler which conflicts with the use of multiprocessing here. This is paritcularly problematic if the http service is terminated before its started and hence before its had a chance to reset the default signal handler (as the code was written). Instead, temporarily remove testimage's handler whilst forking the http process which means the correct handler is installed and won't deadlock. Also take the opportunity to add in some log messages about the server start and shutdown so that future debugging is easier and its clearer what the code is doing. (From OE-Core rev: 0762b6021b87ceb1f37952f3a6d64a36e99ae6a5) Signed-off-by: Richard Purdie --- meta/lib/oeqa/utils/httpserver.py | 37 +++++++++++++++++++++++++++++-------- 1 file changed, 29 insertions(+), 8 deletions(-) (limited to 'meta/lib/oeqa/utils') diff --git a/meta/lib/oeqa/utils/httpserver.py b/meta/lib/oeqa/utils/httpserver.py index 7d12331453..a48d4994fd 100644 --- a/meta/lib/oeqa/utils/httpserver.py +++ b/meta/lib/oeqa/utils/httpserver.py @@ -1,13 +1,13 @@ import http.server import multiprocessing import os +import traceback +import signal from socketserver import ThreadingMixIn class HTTPServer(ThreadingMixIn, http.server.HTTPServer): - def server_start(self, root_dir): - import signal - signal.signal(signal.SIGTERM, signal.SIG_DFL) + def server_start(self, root_dir, logger): os.chdir(root_dir) self.serve_forever() @@ -18,19 +18,40 @@ class HTTPRequestHandler(http.server.SimpleHTTPRequestHandler): class HTTPService(object): - def __init__(self, root_dir, host=''): + def __init__(self, root_dir, host='', logger=None): self.root_dir = root_dir self.host = host self.port = 0 + self.logger = logger def start(self): + if not os.path.exists(self.root_dir): + self.logger.info("Not starting HTTPService for directory %s which doesn't exist" % (self.root_dir)) + return + self.server = HTTPServer((self.host, self.port), HTTPRequestHandler) if self.port == 0: self.port = self.server.server_port - self.process = multiprocessing.Process(target=self.server.server_start, args=[self.root_dir]) + self.process = multiprocessing.Process(target=self.server.server_start, args=[self.root_dir, self.logger]) + + # The signal handler from testimage.bbclass can cause deadlocks here + # if the HTTPServer is terminated before it can restore the standard + #signal behaviour + orig = signal.getsignal(signal.SIGTERM) + signal.signal(signal.SIGTERM, signal.SIG_DFL) self.process.start() + signal.signal(signal.SIGTERM, orig) + + if self.logger: + self.logger.info("Started HTTPService on %s:%s" % (self.host, self.port)) + def stop(self): - self.server.server_close() - self.process.terminate() - self.process.join() + if hasattr(self, "server"): + self.server.server_close() + if hasattr(self, "process"): + self.process.terminate() + self.process.join() + if self.logger: + self.logger.info("Stopped HTTPService on %s:%s" % (self.host, self.port)) + -- cgit v1.2.3-54-g00ecf