To make it easier for people to monitor their custom DERP fleet.
Updates tailscale/corp#20654
Change-Id: Id8af22936a6d893cc7b6186d298ab794a2672524
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
- Wrap each prober function into a probe class that allows associating
metric labels and custom metrics with a given probe;
- Make sure all existing probe classes set a `class` metric label;
- Move bandwidth probe size from being a metric label to a separate
gauge metric; this will make it possible to use it to calculate
average used bandwidth using a PromQL query;
- Also export transfer time for the bandwidth prober (more accurate than
the total probe time, since it excludes connection establishment
time).
Updates tailscale/corp#17912
Signed-off-by: Anton Tolchanov <anton@tailscale.com>
prober uses NewRegionClient() to connect to a derper using a faked up
single-node region, but NewRegionClient() fails to connect if there is
no non-STUN only client in the region. Set the STUN only flag to false
before we call NewRegionClient() so we can monitor nodes marked as
STUN only in the default derpmap.
Updates #11492
Signed-off-by: Val <valerie@tailscale.com>
On some platforms (notably macOS and iOS) we look up the default
interface to bind outgoing connections to. This is both duplicated
work and results in logspam when the default interface is not available
(i.e. when a phone has no connectivity, we log an error and thus cause
more things that we will try to upload and fail).
Fixed by passing around a netmon.Monitor to more places, so that we can
use its cached interface state.
Fixes#7850
Updates #7621
Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This adds an initial and intentionally minimal configuration for
golang-ci, fixes the issues reported, and adds a GitHub Action to check
new pull requests against this linter configuration.
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I8f38fbc315836a19a094d0d3e986758b9313f163
`prober.DERP` was created in #5988 based on derpprobe. Having used it
instead of derpprobe for a few months, I think we have enough confidence
that it works and can now migrate derpprobe to use the prober framework
and get rid of code duplication.
A few notable changes in behaviour:
- results of STUN probes over IPv4 and IPv6 are now reported separately;
- TLS probing now includes OCSP verification;
- probe names in the output have changed;
- ability to send Slack notification from the prober has been removed.
Instead, the prober now exports metrics in Expvar (/debug/vars) and
Prometheus (/debug/varz) formats.
Fixes https://github.com/tailscale/corp/issues/8497
Signed-off-by: Anton Tolchanov <anton@tailscale.com>
This updates all source files to use a new standard header for copyright
and license declaration. Notably, copyright no longer includes a date,
and we now use the standard SPDX-License-Identifier header.
This commit was done almost entirely mechanically with perl, and then
some minimal manual fixes.
Updates #6865
Signed-off-by: Will Norris <will@tailscale.com>
This ensures that each DERP server is probed individually (TLS and STUN)
and also manages per-region mesh probing. Actual probing code has been
copied from cmd/derpprobe.
Signed-off-by: Anton Tolchanov <anton@tailscale.com>
