Commit Graph

11 Commits

Author SHA1 Message Date
Anton Tolchanov c153e6ae2f prober: migrate to Prometheus metric library
This provides an example of using native Prometheus metrics with tsweb.

Prober library seems to be the only user of PrometheusVar, so I am
removing support for it in tsweb.

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2023-04-11 08:37:32 +01:00
Anton Tolchanov 7083246409 prober: only record latency for successful probes
This will make it easier to track probe latency on a dashboard.

Updates https://github.com/tailscale/corp/issues/9916

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2023-03-22 09:24:20 +00:00
Anton Tolchanov 100d8e909e cmd/derpprobe: migrate to the prober framework
`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>
2023-01-31 10:47:42 +00:00
Will Norris 71029cea2d all: update copyright and license headers
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>
2023-01-27 15:36:29 -08:00
Andrew Dunham 06b55ab50f prober: fix test flake
This was tested by running 10000 test iterations and observing no flakes
after this change was made.

Change-Id: Ib036fd03a3a17800132c53c838cc32bfe2961306
Signed-off-by: Andrew Dunham <andrew@tailscale.com>
2022-11-02 09:58:40 -04:00
Anton Tolchanov bd47e28638 prober: optionally spread probes over time
By default all probes with the same probe interval that have been added
together will run on a synchronized schedule, which results in spiky
resource usage and potential throttling by third-party systems (for
example, OCSP servers used by the TLS probes).

To address this, prober can now run in "spread" mode that will
introduce a random delay before the first run of each probe.

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2022-10-21 09:41:53 +01:00
Brad Fitzpatrick 4950fe60bd syncs, all: move to using Go's new atomic types instead of ours
Fixes #5185

Change-Id: I850dd532559af78c3895e2924f8237ccc328449d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2022-08-04 07:47:59 -07:00
Dave Anderson 0968b2d55a
prober: support adding key/value labels to probes. (#4250)
prober: add labels to Probe instances.

This allows especially dynamically-registered probes to have a bunch
more dimensions along which they can be sliced in Prometheus.

Signed-off-by: David Anderson <danderson@tailscale.com>
2022-03-22 13:45:11 -07:00
David Anderson a09c30aac2 prober: refactor probe state into a Probe struct.
Signed-off-by: David Anderson <danderson@tailscale.com>
2022-03-21 13:45:08 -07:00
David Anderson 19f61607b6 prober: run all probes once on initial registration.
Turns out, it's annoying to have to wait the entire interval
before getting any monitorable data, especially for very long
interval probes like hourly/daily checks.

Signed-off-by: David Anderson <danderson@tailscale.com>
2022-03-19 18:54:33 -07:00
David Anderson e41a3b983c prober: library to build healthchecking probers.
Signed-off-by: David Anderson <danderson@tailscale.com>
2022-03-19 18:38:32 -07:00