Provide a script that starts a simple WSGI server
This provides an alternative to using screens in devstack for reading logs. It works out-of-box, so there is no need to install and configure something like Apache. Change-Id: I8811d16cbcb45baaaa4a44b923b813a40714ffa2
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@ -27,6 +27,11 @@ Features
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* html highlighting based on severity
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* filtering based on severity using the level=XXXX parameter (works in
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either text/html or text/plain responses
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* Provides a script named htmlify_server.py that serves htmlified logs
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over HTTP. To view devstack logs: set
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SCREEN_LOGDIR=$DEST/logs/screen and LOG_COLOR=false in localrc
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before running stack.sh, run htmlify_server.py, and point your
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browser at http://devstack-ip:8000/
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Todo
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------------
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19
os_loganalyze/cmd/htmlify_server.py
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19
os_loganalyze/cmd/htmlify_server.py
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#!/usr/bin/python
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os_loganalyze.server
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def main():
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os_loganalyze.server.main()
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103
os_loganalyze/server.py
Executable file
103
os_loganalyze/server.py
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#!/usr/bin/python
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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""" Run a simple WSGI server to serve htmlified logs from local devstack
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machines. Add these lines to localrc before running stack.sh:
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SCREEN_LOGDIR=$DEST/logs/screen
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LOG_COLOR=false
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"""
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import argparse
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import os
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from os_loganalyze.wsgi import application
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import re
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import sys
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import wsgiref.simple_server
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DEF_PORT = 8000
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LOG_PATH = '/opt/stack/logs/screen/'
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def parse_args():
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parser = argparse.ArgumentParser(
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description=__doc__,
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formatter_class=argparse.ArgumentDefaultsHelpFormatter)
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parser.add_argument('--port', '-p', type=int, default=DEF_PORT,
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help='TCP port to listen on')
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parser.add_argument('--logdir', '-l', default=LOG_PATH,
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help='Path to the log files to be served')
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args = parser.parse_args()
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return (args.port, args.logdir)
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def top_wsgi_app(environ, start_response):
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req_path = environ.get('PATH_INFO')
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if bool(re.search('^/$|^/htmlify/?$', req_path)):
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return gen_links_wsgi_app(environ, start_response)
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else:
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return application(environ, start_response, root_path=LOG_PATH)
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def gen_links_wsgi_app(environ, start_response):
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start_response('200 OK', [('Content-type', 'text/html')])
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if environ.get('QUERY_STRING') == 'all':
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return link_generator(all_files=True)
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else:
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return link_generator(all_files=False)
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def link_generator(all_files):
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yield '<head><body>\n'
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filenames = os.listdir(LOG_PATH)
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if all_files:
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yield ("Showing all files in %s. "
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"<a href='/'>Show current logs only</a>\n" % LOG_PATH)
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else:
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yield ("Showing current log files in %s. "
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"<a href='/?all'>Show all files</a>\n" % LOG_PATH)
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filenames = [f for f in filenames if f.endswith('.log')]
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# also exclude files with datestamps in their name
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filenames = [f for f in filenames
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if not re.search('\d{4}-\d{2}-\d{2}', f)]
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for filename in sorted(filenames):
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yield "<p><a href='/htmlify/%s'> %s </a>\n" % (filename, filename)
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yield '</body></html>\n'
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def main():
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global LOG_PATH
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port, LOG_PATH = parse_args()
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if not os.path.isdir(LOG_PATH):
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print "%s is not a directory. Quiting..." % LOG_PATH
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sys.exit(1)
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print "Listening on port %d with %s as root path" % (port, LOG_PATH)
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print "URLs are like: http://host-ip:%d/htmlify/screen-n-api.log" % port
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print "Or goto http://host-ip:%d for a page of links" % port
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wsgiref.simple_server.make_server('', port, top_wsgi_app).serve_forever()
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if __name__ == '__main__':
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main()
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