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nodes: store and show host disk free; warn when low (node-26#41)

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Checkin now carries disk_free_bytes/disk_total_bytes. Stored on the node doc
(not overwritten by older nodes that don't send them). Node page shows a Disk
row; node cards warn amber under 15% free, red under 5% or 2 GB. A full disk
stopped node-002 recording for 17 days while it showed Online.

Frontend unverified locally (no Node, #207); CI build typechecks.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Logan Cusano
2026-10-26 02:24:10 -04:00
co-authored by Claude Opus 5.5
parent 4a93390967
commit 268470b6c0
6 changed files with 86 additions and 1 deletions
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drb-c2-core/tests/test_mqtt_handler.py
+16
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@@ -118,6 +118,22 @@ async def test_checkin_updates_existing_configured_node(handler):
assert "last_seen" in updates
@pytest.mark.asyncio
async def test_checkin_stores_disk_free_and_total(handler):
# node-26#41: a full disk stopped node-002 recording while it showed Online.
existing = {"node_id": "node-01", "status": "online", "configured": True}
with patch("app.internal.mqtt_handler.fstore") as mock_fstore:
mock_fstore.doc_get = AsyncMock(return_value=existing)
mock_fstore.doc_update = AsyncMock()
await handler._handle_checkin("node-01", {"disk_free_bytes": 5, "disk_total_bytes": 100})
updates = mock_fstore.doc_update.call_args[0][2]
assert updates["disk_free_bytes"] == 5 and updates["disk_total_bytes"] == 100
# An older node that doesn't report disk must not wipe the fields.
await handler._handle_checkin("node-01", {"name": "x"})
assert "disk_free_bytes" not in mock_fstore.doc_update.call_args[0][2]
@pytest.mark.asyncio
async def test_checkin_does_not_promote_unconfigured_to_online(handler):
existing = {