Commit Graph

8 Commits (ec1e67b1ab6876cfc3f18b0c427acf3e62c8ed93)

Author SHA1 Message Date
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>
2 years ago
Josh Soref d4811f11a0 all: fix spelling mistakes
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
2 years ago
Brad Fitzpatrick 116f55ff66 all: gofmt for Go 1.19
Updates #5210

Change-Id: Ib02cd5e43d0a8db60c1f09755a8ac7b140b670be
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2 years ago
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>
3 years ago
David Anderson a09c30aac2 prober: refactor probe state into a Probe struct.
Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
David Anderson 94aaec5c66 prober: rename Probe to ProbeFunc.
Making way for a future Probe struct to encapsulate per-probe state.

Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago
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>
3 years ago
David Anderson e41a3b983c prober: library to build healthchecking probers.
Signed-off-by: David Anderson <danderson@tailscale.com>
3 years ago