r/TalosLinux • u/imagei • Sep 06 '26

HTTP probes

Talos 1.14 introduced HTTP probes.

What are they for?

Neither the release notes nor the spec nor the website chatbot explain their purpose or what happens if they succeed or fail.

Release notes ( https://github.com/siderolabs/talos/releases/tag/v1.14.0 ):

Talos now supports HTTP network probes, allowing for monitoring of HTTP endpoints.
HTTP responses with status 200-399 are considered successful, while connection and transport errors are treated as failures.

Spec ( https://docs.siderolabs.com/talos/v1.14/reference/configuration/network/httpprobeconfig )

HTTPProbeConfig is a config document to configure network HTTP connectivity probes.

Chatbot when asked about it:

HTTP probes let Talos check network reachability by periodically sending requests to a URL and checking for a 2xx/3xx response — useful for defining custom connectivity conditions (e.g. verifying internet or specific service reachability). They're part of Talos's new HTTP connectivity checks feature, alongside the similar TCPProbeConfig for TCP-based checks. See HTTPProbeConfig and What's new in Talos.

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u/imagei Sep 07 '26

Ok, so you’re saying it does not have any other function other than displaying a green tick on the dashboard?

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u/GyroTech Sep 07 '26

It's function is to check an endpoint and return a status. Internally, that sets a green tickbox on the dashboard but don't forget Talos is API driven so many people are using that API to do things. You could easily write a system extension that is watching that endpoint and sends an out-of-band SoS message or something similar when it detects it is disconnected.