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container stats: bound hive-c0re's wait for the disk measurement, no total for an agent with no paths

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hive-c0re waited on hive-priv's answer with no timeout, so a hung
hive-priv would stall the disk sampler indefinitely. The wait is now
hive-priv's own 10 min bound plus a minute (the bound is shared as
MEASURE_AGENT_DISK_TIMEOUT); a timeout is an error, so the agent shows
unknown.

An agent with none of state/, work/ or the rootfs has no measurable
size. hive-priv now answers with an error for it instead of a total of
0, which read as a real measurement.
This commit is contained in:
atlas 2026-10-05 16:33:11 +02:00 • committed by mara
commit 960cf9ce30
3 changed files with 131 additions and 36 deletions
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8
hive-priv-sock/src/lib.rs
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@ -291,6 +291,11 @@ pub struct NetworkIsolation {
pub gateway_ip: String,
}
/// Wall-clock bound hive-priv puts on one [`PrivRequest::MeasureAgentDisk`]
/// walk. A caller's own wait has to be longer than this, so a slow walk
/// reaches it as hive-priv's timeout error rather than as its own.
pub const MEASURE_AGENT_DISK_TIMEOUT: std::time::Duration = std::time::Duration::from_mins(10);
/// A request to the privileged helper.
///
/// Wire format: one JSON object per line over `/run/hive/priv.sock`.
@ -565,7 +570,8 @@ pub enum PrivRequest {
/// bytes as a decimal string in `stdout`.
///
/// hive-priv derives all three paths from `agent_name`; the request
/// carries no path. A path that doesn't exist is skipped. A timeout, a
/// carries no path. A path that doesn't exist is skipped; an agent with
/// none of the three has no measurable size and gets an error. A timeout, a
/// non-zero `du` exit or unparseable output is an error, never a partial
/// or zero total. Requires root: `hive-core` cannot read the rootfs or
/// the agent-owned files under `state/` and `work/`.