oxidecomputer / oxidecomputer/omicron

Dataset accounting: Probe zone filesystems should be explicitly requested

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nexus Sled Agent storage
Dominant language
Rust
Stars
572
Forks
97
Avg merge
2d 12h
Merged PRs (30d)
96

Description

Currently, the sled agent picks a random U.2 to hold the zone filesystem for probes

https://github.com/oxidecomputer/omicron/blob/89b998c1c24e26b9e1161acbbd1b236f40470bdd/sled-agent/src/probe_manager.rs#L282-L291

This, unfortunately, leaves nexus out-of-the-loop regarding space allocation within the zone dataset.

Nexus should be aware of where instances are provisioned to manage accounting explicitly.

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First steps

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Research direction

Start in sled-agent/src/probe_manager.rs at the linked lines where a random U.2 is selected for the probe zone filesystem. Trace how Nexus currently learns about instance placement and how space is allocated within the zone dataset. Done means probe zone filesystem placement is explicitly requested or accounted for through Nexus rather than selected silently by the sled agent.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
backend
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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