No grid/console views in buildbot, build view always empty, despite successful build - buildbot

Question

I have installed buildbot -- one docker image with a master, and another with a worker. Inter-container networking is allowed, and they share the same network; I have also a gitea instance, and installed the buildbot_gitea plugin.
So far I got a small project to run make on the worker after a push, and buildbot correctly reports success back to gitea (I can tell form the logs, and gitea also shows the green check image on the repo).
However,
the waterfall view is always empty; console and grid views do not load (they show the "loading" animation and never finish);
in the "Home" buildbot tab, sometimes the list of recent builds show up, sometimes it doesn't. (But the number of recent builds is always correct)
if I click on one of the builds (successful or not, doesn't matter), it shows a build page, but empty (no build steps, no build properties, nothing).
The only things that look strange on the master logs are periodic timeout messages, some connection drop messages:
2020-03-21 12:11:26+0000 [-] Timing out client: IPv4Address(type='TCP', host='172.27.0.1', port=56388)
2020-03-21 12:11:26+0000 [-] Timing out client: IPv4Address(type='TCP', host='172.27.0.1', port=56380)
2020-03-21 12:11:26+0000 [-] Timing out client: IPv4Address(type='TCP', host='172.27.0.1', port=56392)
2020-03-21 12:19:40+0000 [-] dropping connection to peer tcp4:172.27.0.1:56598 with abort=False: None
and this:
2020-03-21 12:10:49+0000 [-] Unhandled error in Deferred:
2020-03-21 12:10:49+0000 [-] Unhandled Error
Traceback (most recent call last):
File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner
self.run()
File "/usr/lib/python3.8/threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "/bbot/sandbox/lib/python3.8/site-packages/twisted/_threads/_threadworker.py", line 46, in work
task()
File "/bbot/sandbox/lib/python3.8/site-packages/twisted/_threads/_team.py", line 190, in doWork
task()
--- <exception caught here> ---
File "/bbot/sandbox/lib/python3.8/site-packages/twisted/python/threadpool.py", line 250, in inContext
result = inContext.theWork()
File "/bbot/sandbox/lib/python3.8/site-packages/twisted/python/threadpool.py", line 266, in <lambda>
inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
File "/bbot/sandbox/lib/python3.8/site-packages/twisted/python/context.py", line 122, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/bbot/sandbox/lib/python3.8/site-packages/twisted/python/context.py", line 85, in callWithContext
return func(*args,**kw)
File "/bbot/sandbox/lib/python3.8/site-packages/buildbot/buildbot_net_usage_data.py", line 204, in _sendBuildbotNetUsageData
res = _sendWithRequests(PHONE_HOME_URL, data)
File "/bbot/sandbox/lib/python3.8/site-packages/buildbot/buildbot_net_usage_data.py", line 197, in _sendWithRequests
r = requests.post(url, json=data)
File "/bbot/sandbox/lib/python3.8/site-packages/requests/api.py", line 119, in post
return request('post', url, data=data, json=json, **kwargs)
File "/bbot/sandbox/lib/python3.8/site-packages/requests/api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "/bbot/sandbox/lib/python3.8/site-packages/requests/sessions.py", line 530, in request
resp = self.send(prep, **send_kwargs)
File "/bbot/sandbox/lib/python3.8/site-packages/requests/sessions.py", line 643, in send
r = adapter.send(request, **kwargs)
File "/bbot/sandbox/lib/python3.8/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='events.buildbot.net', port=443): Max retries exceeded with url: /events/phone_home (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7ff7297704f0>: Failed to establish a new connection: [Errno 110] Operation timed out'))
which seems to happen only once (why is buildbot trying to phone home anyway? there is no mention of events.buildbot.net in any of my config files.
The docker containers have full network access, ipv6, routing and DNS are all fine (tested with the buildbot-master image).
This is my master.cfg:
import os
from twisted.application import service
from buildbot.master import BuildMaster
from buildbot.plugins import *
from buildbot_gitea.auth import GiteaAuth
from buildbot_gitea import *
basedir = '/bbot/bbot-master'
rotateLength = 10000000
maxRotatedFiles = 10
configfile = 'master.cfg'
umask = None
if basedir == '.':
basedir = os.path.abspath(os.path.dirname(__file__))
application = service.Application('buildmaster')
from twisted.python.logfile import LogFile
from twisted.python.log import ILogObserver, FileLogObserver
logfile = LogFile.fromFullPath(os.path.join(basedir, "twistd.log"), rotateLength=rotateLength,
maxRotatedFiles=maxRotatedFiles)
application.setComponent(ILogObserver, FileLogObserver(logfile).emit)
m = BuildMaster(basedir, configfile, umask)
m.setServiceParent(application)
m.log_rotation.rotateLength = rotateLength
m.log_rotation.maxRotatedFiles = maxRotatedFiles# -*- python -*-
# ex: set filetype=python:
from buildbot.plugins import *
c = BuildmasterConfig = {}
####### WORKERS
c['workers'] = [worker.Worker("bbot-worker", "BUILDBOT_PASSWORD")]
c['protocols'] = {'pb': {'port': 9989}}
####### CHANGESOURCES
c['change_source'] = []
c['change_source'].append(changes.PBChangeSource())
####### SCHEDULERS
c['schedulers'] = []
c['schedulers'].append(schedulers.SingleBranchScheduler(
name="all",
change_filter=util.ChangeFilter(branch='master'),
treeStableTimer=None,
builderNames=["runtests"]))
c['schedulers'].append(schedulers.ForceScheduler(
name="force",
builderNames=["runtests"]))
####### BUILDERS
factory = util.BuildFactory()
factory.addStep(steps.Gitea(repourl='gitea#gitea.mydomain:myself/repo.git',
mode='incremental',
workdir="build",
branch="master",
progress=True,
logEnviron=False,
))
factory.addStep(steps.ShellCommand(command=["make"]))
c['builders'] = []
c['builders'].append(
util.BuilderConfig(name="runtests",
workernames=["bbot-worker"],
factory=factory))
####### BUILDBOT SERVICES
c['services'] = [
reporters.GiteaStatusPush(
baseURL="https://gitea.mydomain/",
token="GITEA_API_ACCESS_TOKEN",
verbose=True)
]
####### PROJECT IDENTITY
c['title'] = "My Domain!"
c['titleURL'] = "https://buildbot.mydomain"
c['buildbotURL'] = "https://buildbot.mydomain/"
c['www'] = dict(port=8010,
plugins=dict(waterfall_view={}, console_view={}, grid_view={}))
c['www']['authz'] = util.Authz(
allowRules = [
util.AnyEndpointMatcher(role="admins")
],
roleMatchers = [
util.RolesFromUsername(roles=['admins'], usernames=['myself'])
]
)
c['www']['auth'] = GiteaAuth(
endpoint="https://gitea.mydomain/",
client_id="MY_CLIENT_ID_FROM_GITEA",
client_secret='MY_CLIENT_SECRET_FROM_GITEA')
c['www']['change_hook_dialects'] = {
'gitea': {
'secret': 'THE_GITEA_WEBHOOK_SECRET',
'onlyIncludePushCommit': True
}
}
####### DB URL
c['db'] = {
'db_url' : "postgresql://buildbot:MY_SECRET_DB_PASSWORD#172.25.0.2/buildbot",
}
The Dockerfile for the master is
FROM alpine:3.11.3
EXPOSE 9989
RUN apk update
RUN apk add python3 bash busybox-extras w3m gcc python3-dev libffi-dev openssl-dev musl-dev postgresql-dev
RUN mkdir /bbot
COPY entrypoint.sh /root/
RUN chmod a+x /root/entrypoint.sh
RUN mkdir /root/.ssh && chmod og-rwx /root/.ssh/
COPY bbot-gitea bbot-gitea.pub /root/.ssh/
RUN chmod og-w /root/.ssh/bbot-gitea*
RUN cd /bbot && \
python3 -m venv sandbox && \
source sandbox/bin/activate && \
pip3 install 'buildbot[bundle]' && \
pip3 install 'requests[security]' && \
pip3 -v install buildbot_gitea && \
pip3 install treq && \
pip3 install psycopg2
RUN apk del gcc python3-dev libffi-dev openssl-dev musl-dev
RUN ls -la /root
RUN cat /root/entrypoint.sh
ENTRYPOINT [ "/root/entrypoint.sh" ]
and the entrypoint does nothing special -- it is this,
#!/bin/bash
cd /bbot
echo " BBOT MASTER ENTRYPOINT"
source sandbox/bin/activate
buildbot upgrade-master bbot-master
# debug: check everything that was pip-installed:
echo "\n\n=====\n"
pip3 list
echo "=====\n\n"
if [ ! -f bbot-master/buildbot.tac ]; then
buildbot create-master bbot-master
fi
buildbot start bbot-master
tail -f /bbot/bbot-master/twistd.log
and the pip3 list line, which runs on startup for debugging, shows that I have
buildbot 2.7.0
buildbot-console-view 2.7.0
buildbot-gitea 1.2.0
buildbot-grid-view 2.7.0
buildbot-waterfall-view 2.7.0
buildbot-worker 2.7.0
buildbot-www 2.7.0
edit: checked the JS console in Firefox, and there seems to be a problem connecting to the server via websockets:
Firefox can’t establish a connection to the server at wss://buildbot.mydomain/ws.
From Chrome, this is what I see:
WebSocket connection to 'wss://buildbot.aleph0.info/ws' failed: Error during WebSocket handshake: Unexpected response code: 200
(200? why 200?)
I can't see why it wouldn't work. Apache is configured to do reverse proxying, like this:
RewriteEngine On
RewriteCond ${HTTP:Upgrade} websocket [NC]
RewriteCond ${HTTP:Connection} upgrade [NC]
RewriteRule .* "wss:/localhost:8010/$1" [P,L]
ProxyPass / http://localhost:8010/
ProxyPassReverse / http://localhost:8010/
So... What else can I do to continue debugging this?
(By the way, it does look like the buildbot mailing list is not very active -- after posting this question there I checked the archives, and there is svery low activity. Where do users of Buildbot go these days in order to get and share advice?)

Answer 1

I found the problem!
It was the reverse proxy that wasn't properly configured for websockets.
I used this in my apache virtualhost config,
<Location /ws>
ProxyPass ws://127.0.0.1:8010/ws
ProxyPassReverse ws://127.0.0.1:8010/ws
</Location>
ProxyPass /ws !
ProxyPass / http://localhost:8010/
ProxyPassReverse / http://localhost:8010/
and it works now!
( after searching a lot, I found the solution here:
https://docs.buildbot.net/0.9.2/manual/cfg-www.html )
There it is, in case anyone else needs it.