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dashboard: per-container journald viewer

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new GET /api/journal/{name}?unit=&lines= shells out journalctl -M
<container> -b --no-pager --output=short-iso --lines=<N> (cap 5000).
optional unit filter, restricted to hive-ag3nt.service /
hive-m1nd.service so the shell-out can't be coerced into reading
unrelated units. validates the container name against the live list
before invoking journalctl.

frontend renders a collapsed '↳ logs · <container>' details block
on each container row. expanding triggers a lazy fetch; refresh
button re-fetches; unit dropdown switches between the harness
service (default) and the full machine journal. output sits in a
24em-tall monospace pre, auto-scrolled to the bottom on fresh
fetch.

hive-c0re's systemd unit already runs as root, so journalctl has
the access it needs.
This commit is contained in:
müde 2026-05-15 20:42:56 +02:00
parent 79a46f359a
commit 0385d96bf3
4 changed files with 173 additions and 11 deletions
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55
hive-c0re/assets/app.js
View file

@ -161,11 +161,66 @@
}
li.append(actions);
// Per-container journald viewer. Expand to fetch + render the
// last N lines; refresh button re-fetches; unit selector
// narrows to the harness service (or empty = full machine).
const journalUnit = c.is_manager ? 'hive-m1nd.service' : 'hive-ag3nt.service';
li.append(buildJournalDetails(c.container, journalUnit));
ul.append(li);
}
root.append(ul);
}
// Build the per-container journald <details>. Lazy-fetches when the
// operator expands; refresh re-fetches; unit toggle switches
// between the harness service and the full machine journal.
function buildJournalDetails(containerName, defaultUnit) {
const details = el('details', { class: 'journal' });
const summary = el('summary', {}, '↳ logs · ' + containerName);
const body = el('div', { class: 'journal-body' });
const controls = el('div', { class: 'journal-controls' });
const unitSelect = el('select', { class: 'journal-unit' });
unitSelect.append(
el('option', { value: defaultUnit }, defaultUnit),
el('option', { value: '' }, '(full machine journal)'),
);
const refresh = el('button', { type: 'button', class: 'btn btn-restart journal-refresh' },
'↻ refresh');
const pre = el('pre', { class: 'journal-output' }, 'fetching…');
let fetching = false;
async function fetchLogs() {
if (fetching) return;
fetching = true;
pre.textContent = 'fetching…';
const unit = unitSelect.value;
const params = new URLSearchParams({ lines: '500' });
if (unit) params.set('unit', unit);
try {
const resp = await fetch('/api/journal/' + containerName + '?' + params);
const text = await resp.text();
if (!resp.ok) {
pre.textContent = 'error: ' + resp.status + '\n' + text;
} else {
pre.textContent = text || '(empty)';
// Auto-scroll to bottom on fresh fetch.
pre.scrollTop = pre.scrollHeight;
}
} catch (err) {
pre.textContent = 'fetch failed: ' + err;
} finally {
fetching = false;
}
}
details.addEventListener('toggle', () => { if (details.open) fetchLogs(); });
refresh.addEventListener('click', (e) => { e.preventDefault(); fetchLogs(); });
unitSelect.addEventListener('change', fetchLogs);
controls.append(unitSelect, refresh);
body.append(controls, pre);
details.append(summary, body);
return details;
}
function renderTombstones(s) {
const root = $('tombstones-section');
root.innerHTML = '';