Add a label which differentiates the address family
for STUN checks.
Also initialize the derpprobe_attempts_total and
derpprobe_seconds_total metrics by adding 0 for
the alternate fail/ok case.
Updates tailscale/corp#27249
Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
Some probes might need to run for longer than their scheduling interval,
so this change relaxes the 1-at-a-time restriction, allowing us to
configure probe concurrency and timeout separately. The default values
remain the same (concurrency of 1; timeout of 80% of interval).
Updates tailscale/corp#25479
Signed-off-by: Anton Tolchanov <anton@tailscale.com>
This new type of probe sends DERP packets sized similarly to CallMeMaybe packets
at a rate of 10 packets per second. It records the round-trip times in a Prometheus
histogram. It also keeps track of how many packets are dropped. Packets that fail to
arrive within 5 seconds are considered dropped.
Updates tailscale/corp#24522
Signed-off-by: Percy Wegmann <percy@tailscale.com>
- Keep track of the last 10 probe results and successful probe
latencies;
- Add an HTTP handler that triggers a given probe by name and returns it
result as a plaintext HTML page, showing recent probe results as a
baseline
Updates tailscale/corp#20583
Signed-off-by: Anton Tolchanov <anton@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>
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>
`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>
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>
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>
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>
Mike O'Driscoll
Anton Tolchanov
Percy Wegmann
Will Norris
Josh Soref
Brad Fitzpatrick
Dave Anderson