Commit Graph

10 Commits

Author SHA1 Message Date
Simon Frei
5520022766 lig/ignore, lib/logger: Fix race and potential dead-locks when logging (#4821) 2018-03-17 16:49:12 +01:00
Audrius Butkevicius
c58b383b6d gui: Add debug tab to settings (ref #2644)
Just because there are a ton of people struggling to set env vars.
Perhaps this should live in advanced settings, and perhaps we should have a button to view the log.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4604
LGTM: calmh, imsodin
2017-12-24 22:26:05 +00:00
Simon Frei
719c313b23 cmd/syncthing, lib/logger: Set debug flags on SetDebug for tests
GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4187
2017-06-02 07:04:06 +00:00
Jakob Borg
a492cfba13 cmd/syncthing: Extract interfaces for things the API depends on
Enables testing of the API service, in the long run.
2016-03-21 19:36:08 +00:00
Jakob Borg
2919b76947 The "OK" log level is silly and should not exist 2016-01-16 23:04:41 +01:00
Jakob Borg
cdbc8004fb Comment pedantry 2015-10-31 11:16:07 +01:00
Jakob Borg
464e6bec95 Log lines in REST should have lower case keys 2015-10-27 08:22:35 +01:00
Jakob Borg
503491392d Correct amount of stack unwinding for debug prints 2015-10-22 11:38:45 +02:00
Jakob Borg
76af9ba53d Implement facility based logger, debugging via REST API
This implements a new debug/trace infrastructure based on a slightly
hacked up logger. Instead of the traditional "if debug { ... }" I've
rewritten the logger to have no-op Debugln and Debugf, unless debugging
has been enabled for a given "facility". The "facility" is just a
string, typically a package name.

This will be slightly slower than before; but not that much as it's
mostly a function call that returns immediately. For the cases where it
matters (the Debugln takes a hex.Dump() of something for example, and
it's not in a very occasional "if err != nil" branch) there is an
l.ShouldDebug(facility) that is fast enough to be used like the old "if
debug".

The point of all this is that we can now toggle debugging for the
various packages on and off at runtime. There's a new method
/rest/system/debug that can be POSTed a set of facilities to enable and
disable debug for, or GET from to get a list of facilities with
descriptions and their current debug status.

Similarly a /rest/system/log?since=... can grab the latest log entries,
up to 250 of them (hardcoded constant in main.go) plus the initial few.

Not implemented in this commit (but planned) is a simple debug GUI
available on /debug that shows the current log in an easily pasteable
format and has checkboxes to enable the various debug facilities.

The debug instructions to a user then becomes "visit this URL, check
these boxes, reproduce your problem, copy and paste the log". The actual
log viewer on the hypothetical /debug URL can poll regularly for new log
entries and this bypass the 250 line limit.

The existing STTRACE=foo variable is still obeyed and just sets the
start state of the system.
2015-10-03 18:09:53 +02:00
Jakob Borg
2de364414f Adopt calmh/logger into lib/logger 2015-10-03 18:09:53 +02:00