Commit Graph

8 Commits (b6eabd403862f9ccc2fd11ecd330fe85592be583)

Author SHA1 Message Date
M. J. Fromberger b6eabd4038 util/eventbus: allow logging of slow subscribers (#17705)
Add options to the eventbus.Bus to plumb in a logger.

Route that logger in to the subscriber machinery, and trigger a log message to
it when a subscriber fails to respond to its delivered events for 5s or more.

The log message includes the package, filename, and line number of the call
site that created the subscription.

Add tests that verify this works.

Updates #17680

Change-Id: I0546516476b1e13e6a9cf79f19db2fe55e56c698
Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
(cherry picked from commit 061e6266cf)
1 month ago
Brad Fitzpatrick 9386a101d8 cmd/tailscaled, ipn/localapi, util/eventbus: don't link in regexp when debug is omitted
Saves 442 KB. Lock it with a new min test.

Updates #12614

Change-Id: Ia7bf6f797b6cbf08ea65419ade2f359d390f8e91
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 months ago
Claus Lensbøl d334d9ba07
client/local,cmd/tailscale/cli,ipn/localapi: expose eventbus graph (#16597)
Make it possible to dump the eventbus graph as JSON or DOT to both debug
and document what is communicated via the bus.

Updates #15160

Signed-off-by: Claus Lensbøl <claus@tailscale.com>
5 months ago
Claus Lensbøl 6010812f0c
ipn/localapi,client/local: add debug watcher for bus events (#16239)
Updates: #15160

Signed-off-by: Claus Lensbøl <claus@tailscale.com>
6 months ago
David Anderson d83024a63f util/eventbus: add a debug HTTP handler for the bus
Updates #15160

Signed-off-by: David Anderson <dave@tailscale.com>
9 months ago
David Anderson 346a35f612 util/eventbus: add debugger methods to list pub/sub types
This lets debug tools list the types that clients are wielding, so
that they can build a dataflow graph and other debugging views.

Updates #15160

Signed-off-by: David Anderson <dave@tailscale.com>
9 months ago
David Anderson 853abf8661 util/eventbus: initial debugging facilities for the event bus
Enables monitoring events as they flow, listing bus clients, and
snapshotting internal queues to troubleshoot stalls.

Updates #15160

Signed-off-by: David Anderson <dave@tailscale.com>
9 months ago
David Anderson dd7166cb8e util/eventbus: add internal hook type for debugging
Publicly exposed debugging functions will use these hooks to
observe dataflow in the bus.

Updates #15160

Signed-off-by: David Anderson <dave@tailscale.com>
9 months ago