public/scripts/components/TopologyGraphComponent.js

@@ -15,6 +15,9 @@ class TopologyGraphComponent extends Component {
         this.detailsDrawerContent = null;
         this.detailsDrawerBackdrop = null;
         this.activeDrawerComponent = null;
+
+        // Tooltip for labels on hover
+        this.tooltipEl = null;
     }
 
     // Determine desktop threshold
@@ -101,6 +104,52 @@ class TopologyGraphComponent extends Component {
         if (this.detailsDrawerBackdrop) this.detailsDrawerBackdrop.classList.remove('visible');
     }
 
+    // Tooltip helpers
+    ensureTooltip() {
+        if (this.tooltipEl) return;
+        const el = document.createElement('div');
+        el.className = 'topology-tooltip';
+        document.body.appendChild(el);
+        this.tooltipEl = el;
+    }
+
+    showTooltip(nodeData, pageX, pageY) {
+        this.ensureTooltip();
+        const labels = (nodeData && nodeData.labels) ? nodeData.labels : ((nodeData && nodeData.resources) ? nodeData.resources : null);
+        if (!labels || Object.keys(labels).length === 0) {
+            this.hideTooltip();
+            return;
+        }
+        const chips = Object.entries(labels)
+            .map(([k, v]) => `<span class=\"label-chip\">${this.escapeHtml(String(k))}: ${this.escapeHtml(String(v))}</span>`)
+            .join('');
+        this.tooltipEl.innerHTML = `<div class=\"member-labels\">${chips}</div>`;
+        this.positionTooltip(pageX, pageY);
+        this.tooltipEl.classList.add('visible');
+    }
+
+    positionTooltip(pageX, pageY) {
+        if (!this.tooltipEl) return;
+        const offset = 12;
+        let left = pageX + offset;
+        let top = pageY + offset;
+        const { innerWidth, innerHeight } = window;
+        const rect = this.tooltipEl.getBoundingClientRect();
+        if (left + rect.width > innerWidth - 8) left = pageX - rect.width - offset;
+        if (top + rect.height > innerHeight - 8) top = pageY - rect.height - offset;
+        this.tooltipEl.style.left = `${Math.max(8, left)}px`;
+        this.tooltipEl.style.top = `${Math.max(8, top)}px`;
+    }
+
+    moveTooltip(pageX, pageY) {
+        if (!this.tooltipEl || !this.tooltipEl.classList.contains('visible')) return;
+        this.positionTooltip(pageX, pageY);
+    }
+
+    hideTooltip() {
+        if (this.tooltipEl) this.tooltipEl.classList.remove('visible');
+    }
+
     updateDimensions(container) {
         // Get the container's actual dimensions
         const rect = container.getBoundingClientRect();
@@ -377,15 +426,25 @@ class TopologyGraphComponent extends Component {
             node.append('text')
                 .text(d => d.ip)
                 .attr('x', 15)
-                .attr('y', 20)
+                .attr('y', 22)
                 .attr('font-size', '11px')
                 .attr('fill', 'var(--text-secondary)');
 
+            // App label (between IP and Status)
+            node.append('text')
+                .text(d => (d.labels && d.labels.app) ? String(d.labels.app) : '')
+                .attr('x', 15)
+                .attr('y', 38)
+                .attr('font-size', '11px')
+                .attr('fill', 'var(--text-secondary)')
+                .attr('font-weight', '500')
+                .attr('display', d => (d.labels && d.labels.app) ? null : 'none');
+
             // Status text
             node.append('text')
                 .text(d => d.status)
                 .attr('x', 15)
-                .attr('y', 35)
+                .attr('y', 56)
                 .attr('font-size', '11px')
                 .attr('fill', d => this.getNodeColor(d.status))
                 .attr('font-weight', '600');
@@ -448,12 +507,18 @@ class TopologyGraphComponent extends Component {
                 d3.select(event.currentTarget).select('circle')
                     .attr('r', d => this.getNodeRadius(d.status) + 4)
                     .attr('stroke-width', 3);
+                this.showTooltip(d, event.pageX, event.pageY);
             });
 
             node.on('mouseout', (event, d) => {
                 d3.select(event.currentTarget).select('circle')
                     .attr('r', d => this.getNodeRadius(d.status))
                     .attr('stroke-width', 2);
+                this.hideTooltip();
+            });
+
+            node.on('mousemove', (event, d) => {
+                this.moveTooltip(event.pageX, event.pageY);
             });
 
             link.on('mouseover', (event, d) => {
@@ -696,7 +761,7 @@ class TopologyGraphComponent extends Component {
             hostname: nodeData.hostname,
             status: this.normalizeStatus(nodeData.status),
             latency: nodeData.latency,
-            labels: nodeData.resources || {}
+            labels: (nodeData.labels && typeof nodeData.labels === 'object') ? nodeData.labels : (nodeData.resources || {})
         };
 
         this.memberOverlayComponent.show(memberData);

public/scripts/view-models.js

@@ -536,6 +536,8 @@ class TopologyViewModel extends ViewModel {
                     ip: member.ip,
                     status: member.status || 'UNKNOWN',
                     latency: member.latency || 0,
+                    // Preserve both legacy 'resources' and preferred 'labels'
+                    labels: (member.labels && typeof member.labels === 'object') ? member.labels : (member.resources || {}),
                     resources: member.resources || {},
                     x: Math.random() * 1200 + 100,   // Better spacing for 1400px width
                     y: Math.random() * 800 + 100     // Better spacing for 1000px height

public/styles/main.css

@@ -2925,6 +2925,34 @@ p {
     .details-drawer-backdrop { display: none; }
 }
 
+/* Topology hover tooltip for labels */
+.topology-tooltip {
+    position: fixed;
+    z-index: 1001;
+    pointer-events: none;
+    background: var(--bg-primary);
+    border: 1px solid var(--border-primary);
+    box-shadow: var(--shadow-secondary);
+    border-radius: 10px;
+    padding: 0.5rem 0.6rem;
+    opacity: 0;
+    transform: translateY(4px);
+    transition: opacity 0.12s ease, transform 0.12s ease;
+}
+.topology-tooltip.visible {
+    opacity: 1;
+    transform: translateY(0);
+}
+.topology-tooltip .member-labels {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0.35rem;
+}
+.topology-tooltip .label-chip {
+    font-size: 0.72rem;
+    padding: 0.2rem 0.5rem;
+}
+
 /* Labels section styling in node details */
 .detail-section {
     margin-top: 20px;