End-to-End Watchdog Alerts
Even if you build the most reliable internal meta-monitoring infrastructure, something can still go wrong: the meta-monitoring setup might have a systematic error that causes it to break, the Alertmanager through which notifications are supposed to get delivered to you might be down, or your entire organization's network might be disconnected from the internet!

To help you catch these kinds of situations as a last resort, it's a good idea to set up a watchdog alert (also sometimes called a "dead man's switch", sentinel alert, beacon alert, or heartbeat alert) that helps you continuously test your entire alerting pipeline from beginning to end.
You can achieve this by:

Configuring an alerting rule that is always firing, e.g. using the PromQL expression vector(1), or simply 1 (the numeric value doesn't matter) to always produce a single output time series.
Configuring Alertmanager to route the resulting alert notification to an external service with a repeat interval of a only a few (x) minutes.
Configuring the external service to expect an incoming alert notification every x minutes (plus some slack time) or to send you an alert notification otherwise.

https://training.promlabs.com/training/monitoring-and-debugging-prometheus/metrics-based-meta-monitoring/end-to-end-watchdog-alerts/

FAANG is an acronym used in finance to refer to five of the most influential American technology companies: Meta (formerly Facebook), Amazon, Apple, Netflix, and Alphabet (formerly Google).

این رو به پیشنهاد دوستی ضبط کردم. جنبه آموزشی نداره، بخشی از کاریه که این روزها خیلی خسته‌طور، بین کارها پیش می‌برمش:
https://www.youtube.com/watch?v=u3aTpKRcXQQ

Secure Secrets Management: Leveraging Laravel with HashiCorp Vault

https://github.com/digitlimit/vaulitfy/tree/main/app/Services/Vault

https://www.youtube.com/watch?v=bZdzxcJ0cUg

خوشگایی که hashicorp vault دارین تو زیرساخت استفاده میکنید آپدیت کنید که بساط نشید

Vault and Vault Enterprise are vulnerable to an unauthenticated denial of service when processing JSON payloads.https://nvd.nist.gov/vuln/detail/CVE-2025-12044
See also: https://discuss.hashicorp.com/t/hcsec-2025-24-vault-denial-of-service-though-complex-json-payloads/76393
The Community edition needs upgrade to 1.20.3 and Vault Enterprise to 1.21.0, 1.20.5, 1.19.11, or 1.16.27.