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Write each node's health report into its own key of mesh-host_health on a change, so the watchman raises the machine's alerts without the controller (issue 774, the operator's alert table)

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Until now the six machine alerts came from a health message passing to the controller. The report is now kept in the
engine's declared state `health`, key `<node>`, created by the grants part as `acts` is. Only this node's engine
writes it, after comparing it on every look and only when what it says changed; it is read first after a restart.

It carries:
- the network parts (machine-network; network-rewritten through the resolver file part's writer and owner);
- the tunnel's peers, each seen within five minutes or not (network-unreachable);
- the failed units no module owns (machine-units);
- the accounts marked relogin needed (relogin-needed);
- the directories used as found (directory-used-as-found).

The streaks and the time of the look are left out, so a look alone writes nothing. A peer is reported seen or not,
never its handshake time, so a renewed handshake writes nothing.

The layout is internal/link's (NodeHealth) until it moves into mesh-sdk. Pins mesh-sdk 58a8324.

Tests:
- rows in TestOnTheHubAnyFreshPeerIsAHealthyTunnel: the peers, and a change only when one is seen or lost;
- a case in TestAHealthStatementIsSaidOnTheLinkOpenNow: what the report takes, and one write per change across a
  restart;
- the manifest's states in TestTheManifestConsumesTheBackupEvent.
This commit is contained in:
jschoubben
2026-10-29 22:56:14 +01:00
parent cbe8528f91
commit 65fbc1e6f8
10 changed files with 406 additions and 14 deletions
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go.sum
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@@ -1,5 +1,5 @@
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