Coverage and settings above the chat, tier delays and the probe target alongside them, coverage in three columns

Plugin/unraid/include/fallback.php

@@ -356,6 +356,15 @@ function vv_fb_all(): array {
         'handback_req'        => $handbackReq,
         'check_interval'      => $checkInterval,
         'suspend_after'       => $suspendAfter,
+        // Tier delays are per-host and live in this host's own conf, not master.conf — the save
+        // path has to name the right file per field or the write is refused as an absent key.
+        'my_conf'             => vv_detect_host() . '.conf',
+        'tier_delays'         => [
+            'tier2' => (int)(vv_fb_scalar($myRaw, strtoupper($currentHost) . '_TIER2_DELAY') ?: 240),
+            'tier3' => (int)(vv_fb_scalar($myRaw, strtoupper($currentHost) . '_TIER3_DELAY') ?: 720),
+            'tier4' => (int)(vv_fb_scalar($myRaw, strtoupper($currentHost) . '_TIER4_DELAY') ?: 1440),
+        ],
+        'external_ip'         => vv_fb_scalar($masterRaw, 'EXTERNAL_IP'),
         'nodes'               => $nodes,
     ];
 }

Plugin/unraid/pages/fallback.php

@@ -205,26 +205,6 @@ if (vv_ai_ui_on()) vv_ai_chat_assets();
   <div style="grid-column:1/-1;color:#444;font-size:12px;padding:16px 0;text-align:center;">Loading…</div>
 </div>
 
-<!-- Assistant + mesh chat -->
-<?php if (vv_ai_ui_on()): ?>
-<div class="vv-card" id="vv-fb-ai-card" style="margin-bottom:12px;">
-  <?php vv_ai_chat_markup('vv-fb-ai', [
-      'profile'     => 'varaverk',
-      'compact'     => true,
-      // Fallback is the mesh's business by definition — a failover is two hosts agreeing about
-      // each other — so the mesh side leads here, as it does on Partnership.
-      'mesh'        => true,
-      'meshDefault' => true,
-      'title'       => 'Assistant',
-      'height'      => '300px',
-      'tall'        => '500px',
-      'tallLarge'   => '750px',
-      'empty'       => 'Ask about fallback — why a tier has not fired, what the partner would '
-                     . 'start if this host went dark, whether a stale state file matters.',
-  ]); ?>
-</div>
-<?php endif; ?>
-
 <!-- Failover coverage — this host's own tiers -->
 <!--
   Originally on the Partnership page (e8ee5b0), removed the same day in 1a836da because it
@@ -282,12 +262,75 @@ if (vv_ai_ui_on()) vv_ai_chat_assets();
       <span class="vv-fb-set-unit">minutes</span>
     </div>
   </div>
+
+  <!-- Tier delays live in THIS host's conf and pair with the coverage picker above: the picker
+       says which tier a container is in, these say how long that tier waits. Tier 1 has no delay
+       by definition — it is what goes over immediately — so there is nothing to show for it. -->
+  <div class="vv-fb-qcard">
+    <div class="vv-fb-qlbl">Tier 2 delay</div>
+    <div class="vv-fb-qsub">How long this host must be dark before the partner starts its Tier 2 containers.</div>
+    <div class="vv-fb-qin">
+      <input class="vv-fb-set-inp" id="vv-fb-t2" type="number" min="0" max="10080">
+      <span class="vv-fb-set-unit">minutes</span>
+    </div>
+  </div>
+
+  <div class="vv-fb-qcard">
+    <div class="vv-fb-qlbl">Tier 3 delay</div>
+    <div class="vv-fb-qsub">Same for Tier 3 — secondary services that can wait out a short outage.</div>
+    <div class="vv-fb-qin">
+      <input class="vv-fb-set-inp" id="vv-fb-t3" type="number" min="0" max="10080">
+      <span class="vv-fb-set-unit">minutes</span>
+    </div>
+  </div>
+
+  <div class="vv-fb-qcard">
+    <div class="vv-fb-qlbl">Tier 4 delay</div>
+    <div class="vv-fb-qsub">Same for Tier 4 — the last to move, usually arrs and downloaders.</div>
+    <div class="vv-fb-qin">
+      <input class="vv-fb-set-inp" id="vv-fb-t4" type="number" min="0" max="10080">
+      <span class="vv-fb-set-unit">minutes</span>
+    </div>
+  </div>
+
+  <!-- Not a timing knob but the most consequential value on this page: it decides whether an
+       unreachable partner means "they are down" (FALLBACK) or "we are" (NO_INTERNET), and those
+       two branches do opposite things to DDNS. CONTAINER_VERIFY_WAIT was the obvious fourth card
+       here and is deliberately absent — it is a script local, not a conf var, so a settings row
+       for it would write a key nothing reads. -->
+  <div class="vv-fb-qcard">
+    <div class="vv-fb-qlbl">Internet probe target</div>
+    <div class="vv-fb-qsub">Pinged to tell "the partner is down" apart from "our own line is down". Must be reachable from both hosts.</div>
+    <div class="vv-fb-qin">
+      <input class="vv-fb-set-inp" id="vv-fb-extip" type="text" style="width:120px;" placeholder="8.8.8.8">
+    </div>
+  </div>
 </div>
 
 <div style="display:flex;justify-content:flex-end;align-items:center;gap:10px;margin-bottom:14px;">
   <span id="vv-fb-set-fb" style="font-size:11px;"></span>
   <button class="vv-fb-save-btn" id="vv-fb-save-btn" onclick="vvFbSaveSettings()">Save</button>
 </div>
+<!-- Assistant + mesh chat -->
+<?php if (vv_ai_ui_on()): ?>
+<div class="vv-card" id="vv-fb-ai-card" style="margin-bottom:12px;">
+  <?php vv_ai_chat_markup('vv-fb-ai', [
+      'profile'     => 'varaverk',
+      'compact'     => true,
+      // Fallback is the mesh's business by definition — a failover is two hosts agreeing about
+      // each other — so the mesh side leads here, as it does on Partnership.
+      'mesh'        => true,
+      'meshDefault' => true,
+      'title'       => 'Assistant',
+      'height'      => '300px',
+      'tall'        => '500px',
+      'tallLarge'   => '750px',
+      'empty'       => 'Ask about fallback — why a tier has not fired, what the partner would '
+                     . 'start if this host went dark, whether a stale state file matters.',
+  ]); ?>
+</div>
+<?php endif; ?>
+
 
 <?php
 // The conf sections this page is about, drawn by the shared renderer. They were reachable
@@ -617,11 +660,17 @@ function _setToggles(data) {
 }
 
 function _setInputs(data) {
+  const td = data.tier_delays ?? {};
   const fields = [
     ['vv-fb-interval', data.check_interval ?? 30],
     ['vv-fb-strikes',  data.handback_req   ?? 3],
     ['vv-fb-suspend',  data.suspend_after  ?? 120],
+    ['vv-fb-t2',       td.tier2 ?? 240],
+    ['vv-fb-t3',       td.tier3 ?? 720],
+    ['vv-fb-t4',       td.tier4 ?? 1440],
+    ['vv-fb-extip',    data.external_ip ?? ''],
   ];
+  _vvFbMyConf = data.my_conf || _vvFbMyConf;
   fields.forEach(([id, val]) => {
     const el = document.getElementById(id);
     if (el && el !== document.activeElement) el.value = val;
@@ -734,28 +783,45 @@ window.vvFbToggle = function(track, key) {
     .catch(()  => track.classList.toggle('on', !on));
 };
 
+// Which conf each field belongs to. Tier delays are per-host and live in host<n>.conf; the rest
+// are mesh-wide in master.conf. confform refuses a key it cannot find in the named file rather
+// than appending it into an unknown section, so getting this wrong fails the save outright —
+// which is the right failure, but only if the mapping is stated rather than assumed.
+let _vvFbMyConf = 'host1.conf';
+
 window.vvFbSaveSettings = function() {
-  const ivEl = document.getElementById('vv-fb-interval');
+  const num = id => parseInt(document.getElementById(id).value, 10);
-  const stEl = document.getElementById('vv-fb-strikes');
+  const fb  = document.getElementById('vv-fb-set-fb');
-  const suEl = document.getElementById('vv-fb-suspend');
+  const btn = document.getElementById('vv-fb-save-btn');
-  const fb   = document.getElementById('vv-fb-set-fb');
-  const btn  = document.getElementById('vv-fb-save-btn');
 
-  const interval = parseInt(ivEl.value, 10);
+  const interval = num('vv-fb-interval'), strikes = num('vv-fb-strikes'), suspend = num('vv-fb-suspend');
-  const strikes  = parseInt(stEl.value, 10);
+  const t2 = num('vv-fb-t2'), t3 = num('vv-fb-t3'), t4 = num('vv-fb-t4');
-  const suspend  = parseInt(suEl.value, 10);
+  const extip = (document.getElementById('vv-fb-extip').value || '').trim();
 
-  if ([interval, strikes, suspend].some(n => isNaN(n) || n < 0)) {
+  if ([interval, strikes, suspend, t2, t3, t4].some(n => isNaN(n) || n < 0)) {
     fb.style.color = '#ef5350'; fb.textContent = 'Invalid values'; return;
   }
+  // Tiers fire in order, and a later tier that fires sooner than an earlier one is a config that
+  // cannot do what it reads as. Caught here rather than at 3am during an outage.
+  if (!(t2 <= t3 && t3 <= t4)) {
+    fb.style.color = '#ef5350'; fb.textContent = 'Tier delays must increase: T2 ≤ T3 ≤ T4'; return;
+  }
+  if (extip === '') {
+    fb.style.color = '#ef5350'; fb.textContent = 'Probe target cannot be empty'; return;
+  }
 
   btn.disabled = true; btn.textContent = 'Saving…'; fb.textContent = '';
+  const H = _vvFbMyConf.replace('.conf', '').toUpperCase();
   const fd = new URLSearchParams();
   fd.append('id', 'fallback');
   fd.append('changes', JSON.stringify([
-    { file: 'master.conf', key: 'FALLBACK_CHECK_INTERVAL',            value: String(interval), type: 'scalar' },
+    { file: 'master.conf',  key: 'FALLBACK_CHECK_INTERVAL',            value: String(interval), type: 'scalar' },
-    { file: 'master.conf', key: 'FALLBACK_HANDBACK_STRIKES',          value: String(strikes),  type: 'scalar' },
+    { file: 'master.conf',  key: 'FALLBACK_HANDBACK_STRIKES',          value: String(strikes),  type: 'scalar' },
-    { file: 'master.conf', key: 'FALLBACK_PARTNERSHIP_SUSPEND_AFTER', value: String(suspend),  type: 'scalar' },
+    { file: 'master.conf',  key: 'FALLBACK_PARTNERSHIP_SUSPEND_AFTER', value: String(suspend),  type: 'scalar' },
+    { file: 'master.conf',  key: 'EXTERNAL_IP',                        value: extip,            type: 'scalar' },
+    { file: _vvFbMyConf,   key: H + '_TIER2_DELAY',                 value: String(t2),       type: 'scalar' },
+    { file: _vvFbMyConf,   key: H + '_TIER3_DELAY',                 value: String(t3),       type: 'scalar' },
+    { file: _vvFbMyConf,   key: H + '_TIER4_DELAY',                 value: String(t4),       type: 'scalar' },
   ]));
   fetch('/plugins/varaverk/api/confform.php', { method: 'POST', body: fd })
     .then(r => r.json())
@@ -763,7 +829,7 @@ window.vvFbSaveSettings = function() {
       btn.disabled = false; btn.textContent = 'Save';
       fb.style.color = d.ok ? '#4caf50' : '#ef5350';
       fb.textContent  = d.ok ? 'Saved ✓' : (d.error || 'Failed');
-      if (d.ok) setTimeout(() => { fb.textContent = ''; }, 3000);
+      if (d.ok) { setTimeout(() => { fb.textContent = ''; }, 3000); vvFbLoad(); }
     })
     .catch(() => {
       btn.disabled = false; btn.textContent = 'Save';
@@ -819,7 +885,11 @@ function _vvFbCovRender() {
     </div>`;
   }).join('');
 
-  body.innerHTML = `<div style="max-height:320px;overflow:auto;">${rows}</div>`;
+  // Three columns. One column of forty-nine rows is a scroll, not a list — you cannot see what
+  // is covered without dragging, which is the one thing this card exists to show.
+  body.innerHTML = '<div style="max-height:340px;overflow:auto;display:grid;'
+                 + 'grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:0 14px;">'
+                 + rows + '</div>';
 }
 
 // Tier 0 means "not covered" — the picker's way of removing something, since an array the