feat: fix the Grafana dashboards and add sessions dashboards and alerting - #36
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…ting The dashboards were broken in three ways, none of which a render test could catch, and all of which look like a data problem rather than a bug. The namespace picker in dashboard-theiacloud.yaml was a hand-written list: theia, theia-staging, test1, test2, test3. The real namespaces have been eduide-test1 and friends since 2.0.0, so every option was a dead namespace and the dashboard was empty whatever you picked. It is now a query over the namespaces bootstrap already derives from the environments, so it cannot go stale again. An empty list renders ^$ rather than falling back to .*, so a cluster with no monitored environments shows an empty picker instead of graphing other tenants. Four of the six panels also selected on service=~"theia-.*", a label that stopped existing when the sessions stopped sitting behind theia-* Services. That returns zero series against the live cluster; without it, six. Those panels have been blank for months. The theia-cloud-sessions PodMonitor has never produced a sample. It scrapes port application on every session pod, but session pods are Theia IDEs serving HTML, so all 30 targets sit permanently down with 'unsupported Content-Type text/html' and ~1480 candidates are dropped per cycle. Removed, along with monitoring.sessionNamespaces. Nothing is lost: session data comes from cAdvisor, kubelet and kube-state-metrics, which need no PodMonitor. New: an EduIDE Sessions dashboard (usage, warm pool, startup latency, resources against limits, throttling, workspace bytes and inodes, oldest sessions) and an EduIDE Session Detail dashboard reached from it, scoped to a single pod. New: 16 alerts behind monitoring.alerting.enabled, and an AlertmanagerConfig with native Slack and Discord receivers. Only critical and warning reach the channels; minSeverity raises that cut-off without editing rules, and every threshold is a value. Session-level faults alert on rates across an environment rather than per pod, and exit codes 137 and 143 are excluded, because this platform runs student code and one notification per OOM kill is how a channel stops being read. Every alert expression was run against the live Prometheus on tum-student. The seven that return nothing are healthy zeros, verified by finding the same metrics and labels elsewhere on the cluster, not selectors that match nothing. Alerts carry namespace: eduide-system as a routing label, because the Prometheus Operator defaults alertmanagerConfigMatcherStrategy to OnNamespace and prepends that matcher to every route it generates. The environment is in eduide_namespace, which is also what grouping and any silence must use. Also adds a cert-manager ServiceMonitor: it exports certificate expiry but ships no ServiceMonitor, so nothing was watching the hand-renewed webview wildcard at all. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019qeiQRFu8xAMRYWPdZewjG
Rendered diff across all environments5026 lines changeddiff -ru out-base/_eduide-cluster.yaml out-head/_eduide-cluster.yaml
--- out-base/_eduide-cluster.yaml 2026-08-28 17:33:31.699469208 +0000
+++ out-head/_eduide-cluster.yaml 2026-08-28 17:33:34.033599299 +0000
@@ -1,4 +1,4547 @@
---
+# Source: eduide-cluster/templates/monitoring/alert-webhook-secret.yaml
+apiVersion: v1
+kind: Secret
+type: Opaque
+metadata:
+ name: eduide-alert-webhooks
+ namespace: eduide-system
+ labels:
+ app.kubernetes.io/part-of: eduide
+data:
+ discord-platform: "aHR0cHM6Ly9leGFtcGxlLm9yZy9kaXNjb3JkLXdlYmhvb2s="
+ slack-platform: "aHR0cHM6Ly9leGFtcGxlLm9yZy9zbGFjay13ZWJob29r"
+---
+# Source: eduide-cluster/templates/monitoring/dashboard-session-detail.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+ labels:
+ grafana_dashboard: "1"
+ name: eduide-dashboard-session-detail
+ namespace: monitoring
+data:
+ eduide-session-detail.json: |-
+ {
+ "annotations": {
+ "list": [
+ {
+ "builtIn": 1,
+ "datasource": {
+ "type": "grafana",
+ "uid": "-- Grafana --"
+ },
+ "enable": true,
+ "hide": true,
+ "iconColor": "rgba(0, 211, 255, 1)",
+ "name": "Annotations & Alerts",
+ "type": "dashboard"
+ }
+ ]
+ },
+ "description": "One session, in detail. Pick the environment and the pod; every panel is scoped to that pod.",
+ "editable": true,
+ "fiscalYearStartMonth": 0,
+ "graphTooltip": 1,
+ "links": [
+ {
+ "asDropdown": false,
+ "icon": "external link",
+ "tags": [],
+ "targetBlank": false,
+ "title": "All sessions",
+ "tooltip": "Back to the sessions overview",
+ "type": "link",
+ "url": "/d/eduide-sessions/eduide-sessions"
+ }
+ ],
+ "panels": [
+ {
+ "collapsed": false,
+ "gridPos": {
+ "h": 1,
+ "w": 24,
+ "x": 0,
+ "y": 0
+ },
+ "id": 200,
+ "panels": [],
+ "title": "This session",
+ "type": "row"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "How long this pod has existed. Not how long the student has been working - a warm-pool pod is created before anyone claims it.",
+ "gridPos": {
+ "h": 5,
+ "w": 4,
+ "x": 0,
+ "y": 1
+ },
+ "id": 201,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "time() - max(kube_pod_created{namespace=~\"$namespace\", pod=~\"$pod\"})",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Age",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "s",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Both the IDE and its oauth2-proxy sidecar must be ready before the session serves traffic. 1 of 2 means the proxy is failing, which presents to the student as a login loop or a 403.",
+ "gridPos": {
+ "h": 5,
+ "w": 4,
+ "x": 4,
+ "y": 1
+ },
+ "id": 202,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "sum(kube_pod_container_status_ready{namespace=~\"$namespace\", pod=~\"$pod\"})",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Ready containers",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Any restart of a session container loses the student's terminal state and unsaved editor buffers.",
+ "gridPos": {
+ "h": 5,
+ "w": 4,
+ "x": 8,
+ "y": 1
+ },
+ "id": 203,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "sum(kube_pod_container_status_restarts_total{namespace=~\"$namespace\", pod=~\"$pod\"})",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Restarts",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ },
+ {
+ "color": "orange",
+ "value": 1
+ },
+ {
+ "color": "red",
+ "value": 3
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Limit minus current working set for the IDE container. When this approaches zero the kernel kills the container.",
+ "gridPos": {
+ "h": 5,
+ "w": 6,
+ "x": 12,
+ "y": 1
+ },
+ "id": 204,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "sum(kube_pod_container_resource_limits{namespace=~\"$namespace\", pod=~\"$pod\", resource=\"memory\", container!~\"oauth.*\"}) - sum(container_memory_working_set_bytes{namespace=~\"$namespace\", pod=~\"$pod\", container!=\"\", container!~\"oauth.*\", container!=\"POD\"})",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Memory headroom",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "bytes",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "red",
+ "value": null
+ },
+ {
+ "color": "orange",
+ "value": 209715200
+ },
+ {
+ "color": "green",
+ "value": 524288000
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Percentage of this session's own workspace volume in use, if it has a persistent one. Joined to the pod through kube_pod_spec_volumes_persistentvolumeclaims_info: kubelet_volume_stats_* is keyed by claim, not by pod, so an unjoined max would report the largest volume anywhere in the namespace and attribute another student's full disk to this session.",
+ "gridPos": {
+ "h": 5,
+ "w": 6,
+ "x": 18,
+ "y": 1
+ },
+ "id": 205,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "max(100 * kubelet_volume_stats_used_bytes{namespace=~\"$namespace\"} / kubelet_volume_stats_capacity_bytes{namespace=~\"$namespace\"} and on (namespace, persistentvolumeclaim) kube_pod_spec_volumes_persistentvolumeclaims_info{namespace=~\"$namespace\", pod=~\"$pod\"})",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Workspace used",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "percent",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ },
+ {
+ "color": "orange",
+ "value": 75
+ },
+ {
+ "color": "red",
+ "value": 85
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "collapsed": false,
+ "gridPos": {
+ "h": 1,
+ "w": 24,
+ "x": 0,
+ "y": 6
+ },
+ "id": 210,
+ "panels": [],
+ "title": "Resources",
+ "type": "row"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "The dashed limit line is what the container is killed at. The oauth2-proxy sidecar is included here on purpose: it is small, and a proxy eating memory is a real failure mode.",
+ "gridPos": {
+ "h": 8,
+ "w": 12,
+ "x": 0,
+ "y": 7
+ },
+ "id": 211,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "container_memory_working_set_bytes{namespace=~\"$namespace\", pod=~\"$pod\", container!=\"\", container!=\"POD\"}",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}}",
+ "range": true,
+ "refId": "A"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "kube_pod_container_resource_limits{namespace=~\"$namespace\", pod=~\"$pod\", resource=\"memory\"}",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}} limit",
+ "range": true,
+ "refId": "B"
+ }
+ ],
+ "title": "Memory per container, against the limit",
+ "type": "timeseries",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "unit": "bytes",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "maxHeight": 600,
+ "mode": "multi",
+ "sort": "desc"
+ }
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "A container pinned at its limit is being throttled; see the panel below for how hard.",
+ "gridPos": {
+ "h": 8,
+ "w": 12,
+ "x": 12,
+ "y": 7
+ },
+ "id": 212,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "rate(container_cpu_usage_seconds_total{namespace=~\"$namespace\", pod=~\"$pod\", container!=\"\", container!=\"POD\"}[5m])",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}}",
+ "range": true,
+ "refId": "A"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "kube_pod_container_resource_limits{namespace=~\"$namespace\", pod=~\"$pod\", resource=\"cpu\"}",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}} limit",
+ "range": true,
+ "refId": "B"
+ }
+ ],
+ "title": "CPU per container, against the limit",
+ "type": "timeseries",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "maxHeight": 600,
+ "mode": "multi",
+ "sort": "desc"
+ }
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Scheduling periods in which the container wanted CPU and was denied. Non-zero here with normal-looking CPU usage is the signature of a session that feels slow to the student but looks fine to the cluster.",
+ "gridPos": {
+ "h": 8,
+ "w": 8,
+ "x": 0,
+ "y": 15
+ },
+ "id": 213,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "rate(container_cpu_cfs_throttled_periods_total{namespace=~\"$namespace\", pod=~\"$pod\", container!=\"\", container!=\"POD\"}[5m])",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "CPU throttled periods",
+ "type": "timeseries",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ },
+ "min": 0
+ },
+ "overrides": []
+ },
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "maxHeight": 600,
+ "mode": "multi",
+ "sort": "desc"
+ }
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Traffic to and from the session. A live IDE holds an open WebSocket, so a flatline on both while the pod is Running means the student's connection dropped even though nothing restarted.",
+ "gridPos": {
+ "h": 8,
+ "w": 8,
+ "x": 8,
+ "y": 15
+ },
+ "id": 214,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "rate(container_network_receive_bytes_total{namespace=~\"$namespace\", pod=~\"$pod\"}[5m])",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "received",
+ "range": true,
+ "refId": "A"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "rate(container_network_transmit_bytes_total{namespace=~\"$namespace\", pod=~\"$pod\"}[5m])",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "transmitted",
+ "range": true,
+ "refId": "B"
+ }
+ ],
+ "title": "Network",
+ "type": "timeseries",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "unit": "Bps",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "maxHeight": 600,
+ "mode": "multi",
+ "sort": "desc"
+ }
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Non-zero means the container is not running and why: ImagePullBackOff for a tag that was never built, CreateContainerConfigError for a missing secret or ConfigMap, CrashLoopBackOff for a container that keeps exiting.",
+ "gridPos": {
+ "h": 8,
+ "w": 8,
+ "x": 16,
+ "y": 15
+ },
+ "id": 215,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "kube_pod_container_status_waiting_reason{namespace=~\"$namespace\", pod=~\"$pod\"} > 0",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}}: {{reason}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Container waiting reason",
+ "type": "timeseries",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 30,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "maxHeight": 600,
+ "mode": "multi",
+ "sort": "desc"
+ }
+ }
+ },
+ {
+ "collapsed": false,
+ "gridPos": {
+ "h": 1,
+ "w": 24,
+ "x": 0,
+ "y": 23
+ },
+ "id": 220,
+ "panels": [],
+ "title": "How it ended",
+ "type": "row"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "What killed the container the last time it stopped. OOMKilled means it exceeded its memory limit. Error means the process exited non-zero. Completed with exit 143 or 137 is the garbage collector stopping an idle session, which is routine and not a fault.",
+ "gridPos": {
+ "h": 7,
+ "w": 12,
+ "x": 0,
+ "y": 24
+ },
+ "id": 221,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "kube_pod_container_status_last_terminated_reason{namespace=~\"$namespace\", pod=~\"$pod\"} > 0",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}}: {{reason}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Last termination reason",
+ "type": "timeseries",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 30,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "maxHeight": 600,
+ "mode": "multi",
+ "sort": "desc"
+ }
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "137 is SIGKILL, 143 is SIGTERM - both are normal shutdowns. Anything else came from inside the container.",
+ "gridPos": {
+ "h": 7,
+ "w": 12,
+ "x": 12,
+ "y": 24
+ },
+ "id": 222,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "kube_pod_container_status_last_terminated_exitcode{namespace=~\"$namespace\", pod=~\"$pod\"}",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "{{container}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Last exit code",
+ "type": "timeseries",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "palette-classic"
+ },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": {
+ "legend": false,
+ "tooltip": false,
+ "viz": false
+ },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": {
+ "type": "linear"
+ },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": {
+ "group": "A",
+ "mode": "none"
+ },
+ "thresholdsStyle": {
+ "mode": "off"
+ }
+ },
+ "mappings": [],
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": {
+ "maxHeight": 600,
+ "mode": "multi",
+ "sort": "desc"
+ }
+ }
+ }
+ ],
+ "refresh": "30s",
+ "schemaVersion": 39,
+ "tags": [
+ "eduide"
+ ],
+ "templating": {
+ "list": [
+ {
+ "current": {},
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "definition": "label_values(kube_pod_info{namespace=~\"^(eduide-prod)$\"},namespace)",
+ "hide": 0,
+ "includeAll": false,
+ "label": "Environment",
+ "multi": false,
+ "name": "namespace",
+ "options": [],
+ "query": {
+ "qryType": 1,
+ "query": "label_values(kube_pod_info{namespace=~\"^(eduide-prod)$\"},namespace)",
+ "refId": "PrometheusVariableQueryEditor-VariableQuery"
+ },
+ "refresh": 1,
+ "regex": "",
+ "skipUrlSync": false,
+ "sort": 1,
+ "type": "query"
+ },
+ {
+ "current": {},
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "definition": "label_values(kube_pod_info{namespace=~\"$namespace\", pod=~\"(session-|instance-).*\"},pod)",
+ "hide": 0,
+ "includeAll": false,
+ "label": "Session pod",
+ "multi": false,
+ "name": "pod",
+ "options": [],
+ "query": {
+ "qryType": 1,
+ "query": "label_values(kube_pod_info{namespace=~\"$namespace\", pod=~\"(session-|instance-).*\"},pod)",
+ "refId": "PrometheusVariableQueryEditor-VariableQuery"
+ },
+ "refresh": 2,
+ "regex": "",
+ "skipUrlSync": false,
+ "sort": 1,
+ "type": "query"
+ }
+ ]
+ },
+ "time": {
+ "from": "now-3h",
+ "to": "now"
+ },
+ "timepicker": {},
+ "timezone": "browser",
+ "title": "EduIDE Session Detail",
+ "uid": "eduide-session-detail",
+ "version": 1,
+ "weekStart": ""
+ }
+---
+# Source: eduide-cluster/templates/monitoring/dashboard-session-startup.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+ labels:
+ grafana_dashboard: "1"
+ name: theia-cloud-dashboard-session-startup
+ namespace: monitoring
+data:
+ session-startup.json: |-
+ {
+ "annotations": {
+ "list": [
+ {
+ "builtIn": 1,
+ "datasource": { "type": "grafana", "uid": "-- Grafana --" },
+ "enable": true,
+ "hide": true,
+ "iconColor": "rgba(0, 211, 255, 1)",
+ "name": "Annotations & Alerts",
+ "type": "dashboard"
+ }
+ ]
+ },
+ "editable": true,
+ "fiscalYearStartMonth": 0,
+ "graphTooltip": 0,
+ "id": 49,
+ "links": [],
+ "panels": [
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "fieldConfig": {
+ "defaults": {
+ "color": { "mode": "palette-classic" },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": { "legend": false, "tooltip": false, "viz": false },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": { "type": "linear" },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": { "group": "A", "mode": "none" },
+ "thresholdsStyle": { "mode": "off" }
+ },
+ "mappings": [],
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ { "color": "green", "value": null },
+ { "color": "red", "value": 80 }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "gridPos": { "h": 8, "w": 12, "x": 0, "y": 0 },
+ "id": 1,
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": { "maxHeight": 600, "mode": "single", "sort": "none" }
+ },
+ "targets": [
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "editorMode": "code",
+ "expr": "rate(application_application_theiacloud_session_startup_seconds_seconds_sum{namespace=~\"$namespace\"}[5m]) \n/ \nrate(application_application_theiacloud_session_startup_seconds_seconds_count{namespace=~\"$namespace\"}[5m])",
+ "instant": false,
+ "interval": "",
+ "legendFormat": "{{app_definition}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Average Session Startup Seconds",
+ "type": "timeseries"
+ },
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "fieldConfig": {
+ "defaults": {
+ "color": { "mode": "palette-classic" },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": { "legend": false, "tooltip": false, "viz": false },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": { "type": "linear" },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": { "group": "A", "mode": "none" },
+ "thresholdsStyle": { "mode": "off" }
+ },
+ "mappings": [],
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ { "color": "green", "value": null },
+ { "color": "red", "value": 80 }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "gridPos": { "h": 8, "w": 12, "x": 12, "y": 0 },
+ "id": 2,
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": { "maxHeight": 600, "mode": "single", "sort": "none" }
+ },
+ "targets": [
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "editorMode": "code",
+ "expr": "application_application_theiacloud_session_startup_seconds_seconds{namespace=~\"$namespace\", quantile=\"0.5\"}",
+ "instant": false,
+ "legendFormat": "{{app_definition}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Median Session Startup Seconds",
+ "type": "timeseries"
+ },
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "fieldConfig": {
+ "defaults": {
+ "color": { "mode": "palette-classic" },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": { "legend": false, "tooltip": false, "viz": false },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": { "type": "linear" },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": { "group": "A", "mode": "none" },
+ "thresholdsStyle": { "mode": "off" }
+ },
+ "mappings": [],
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ { "color": "green", "value": null },
+ { "color": "red", "value": 80 }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "gridPos": { "h": 8, "w": 12, "x": 0, "y": 8 },
+ "id": 4,
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": { "maxHeight": 600, "mode": "single", "sort": "none" }
+ },
+ "targets": [
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "editorMode": "code",
+ "expr": "application_application_theiacloud_session_startup_seconds_seconds{namespace=~\"$namespace\", quantile=\"0.95\"}",
+ "instant": false,
+ "legendFormat": "{{app_definition}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "P95 Session Startup Seconds",
+ "type": "timeseries"
+ },
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "fieldConfig": {
+ "defaults": {
+ "color": { "mode": "palette-classic" },
+ "custom": {
+ "axisBorderShow": false,
+ "axisCenteredZero": false,
+ "axisColorMode": "text",
+ "axisLabel": "",
+ "axisPlacement": "auto",
+ "barAlignment": 0,
+ "drawStyle": "line",
+ "fillOpacity": 0,
+ "gradientMode": "none",
+ "hideFrom": { "legend": false, "tooltip": false, "viz": false },
+ "insertNulls": false,
+ "lineInterpolation": "linear",
+ "lineWidth": 1,
+ "pointSize": 5,
+ "scaleDistribution": { "type": "linear" },
+ "showPoints": "auto",
+ "spanNulls": false,
+ "stacking": { "group": "A", "mode": "none" },
+ "thresholdsStyle": { "mode": "off" }
+ },
+ "mappings": [],
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ { "color": "green", "value": null },
+ { "color": "red", "value": 80 }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "gridPos": { "h": 8, "w": 12, "x": 12, "y": 8 },
+ "id": 3,
+ "options": {
+ "legend": {
+ "calcs": [],
+ "displayMode": "list",
+ "placement": "bottom",
+ "showLegend": true
+ },
+ "tooltip": { "maxHeight": 600, "mode": "single", "sort": "none" }
+ },
+ "targets": [
+ {
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "editorMode": "code",
+ "expr": "application_application_theiacloud_session_startup_seconds_seconds{namespace=~\"$namespace\", quantile=\"0.99\"}",
+ "instant": false,
+ "legendFormat": "{{app_definition}}",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "P99 Session Startup Seconds",
+ "type": "timeseries"
+ }
+ ],
+ "refresh": "",
+ "schemaVersion": 39,
+ "tags": [],
+ "templating": {
+ "list": [
+ {
+ "allValue": "^(eduide-prod)$",
+ "current": {},
+ "datasource": { "type": "prometheus", "uid": "prometheus" },
+ "definition": "label_values(kube_pod_info{namespace=~\"^(eduide-prod)$\"},namespace)",
+ "hide": 0,
+ "includeAll": true,
+ "label": "Namespace",
+ "multi": false,
+ "name": "namespace",
+ "options": [],
+ "query": {
+ "qryType": 1,
+ "query": "label_values(kube_pod_info{namespace=~\"^(eduide-prod)$\"},namespace)",
+ "refId": "PrometheusVariableQueryEditor-VariableQuery"
+ },
+ "refresh": 1,
+ "regex": "",
+ "skipUrlSync": false,
+ "sort": 1,
+ "type": "query"
+ }
+ ]
+ },
+ "time": { "from": "now-1h", "to": "now" },
+ "timeRangeUpdatedDuringEditOrView": false,
+ "timepicker": {},
+ "timezone": "browser",
+ "title": "Theia Cloud Session Startup Time",
+ "uid": "bf4ha4miogutcc",
+ "version": 8,
+ "weekStart": ""
+ }
+---
+# Source: eduide-cluster/templates/monitoring/dashboard-sessions.yaml
+apiVersion: v1
+kind: ConfigMap
+metadata:
+ labels:
+ grafana_dashboard: "1"
+ name: eduide-dashboard-sessions
+ namespace: monitoring
+data:
+ eduide-sessions.json: |-
+ {
+ "annotations": {
+ "list": [
+ {
+ "builtIn": 1,
+ "datasource": {
+ "type": "grafana",
+ "uid": "-- Grafana --"
+ },
+ "enable": true,
+ "hide": true,
+ "iconColor": "rgba(0, 211, 255, 1)",
+ "name": "Annotations & Alerts",
+ "type": "dashboard"
+ }
+ ]
+ },
+ "description": "Who is using EduIDE right now, how well it is serving them, and what it is costing the cluster.",
+ "editable": true,
+ "fiscalYearStartMonth": 0,
+ "graphTooltip": 1,
+ "links": [],
+ "panels": [
+ {
+ "collapsed": false,
+ "gridPos": {
+ "h": 1,
+ "w": 24,
+ "x": 0,
+ "y": 0
+ },
+ "id": 100,
+ "panels": [],
+ "title": "Right now",
+ "type": "row"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Pods named session-*. One per student actually working. Warm-pool pods are renamed to session-* when a student claims one.",
+ "gridPos": {
+ "h": 5,
+ "w": 6,
+ "x": 0,
+ "y": 1
+ },
+ "id": 101,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "count(kube_pod_info{namespace=~\"$namespace\", pod=~\"session-.*\"}) or vector(0)",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Sessions in use",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Pods named instance-*: started ahead of demand so a student does not wait for a cold start. If this reaches 0 the next student waits.",
+ "gridPos": {
+ "h": 5,
+ "w": 6,
+ "x": 6,
+ "y": 1
+ },
+ "id": 102,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "count(kube_pod_info{namespace=~\"$namespace\", pod=~\"instance-.*\"}) or vector(0)",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Warm pool waiting",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "red",
+ "value": null
+ },
+ {
+ "color": "orange",
+ "value": 1
+ },
+ {
+ "color": "green",
+ "value": 2
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Everything a student could be sitting in, claimed or not.",
+ "gridPos": {
+ "h": 5,
+ "w": 6,
+ "x": 12,
+ "y": 1
+ },
+ "id": 103,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "count(kube_pod_info{namespace=~\"$namespace\", pod=~\"(session-|instance-).*\"}) or vector(0)",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "IDE pods total",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "How many EduIDE namespaces Prometheus can currently see. A drop here means an environment stopped reporting, not that it has no sessions.",
+ "gridPos": {
+ "h": 5,
+ "w": 6,
+ "x": 18,
+ "y": 1
+ },
+ "id": 104,
+ "targets": [
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "editorMode": "code",
+ "expr": "count(count by (namespace) (kube_pod_info{namespace=~\"$namespace\"})) or vector(0)",
+ "format": "time_series",
+ "instant": false,
+ "legendFormat": "",
+ "range": true,
+ "refId": "A"
+ }
+ ],
+ "title": "Environments reporting",
+ "type": "stat",
+ "fieldConfig": {
+ "defaults": {
+ "color": {
+ "mode": "thresholds"
+ },
+ "mappings": [],
+ "noValue": "0",
+ "unit": "none",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ {
+ "color": "green",
+ "value": null
+ }
+ ]
+ }
+ },
+ "overrides": []
+ },
+ "options": {
+ "colorMode": "value",
+ "graphMode": "area",
+ "justifyMode": "auto",
+ "orientation": "auto",
+ "reduceOptions": {
+ "calcs": [
+ "lastNotNull"
+ ],
+ "fields": "",
+ "values": false
+ },
+ "textMode": "auto"
+ }
+ },
+ {
+ "collapsed": false,
+ "gridPos": {
+ "h": 1,
+ "w": 24,
+ "x": 0,
+ "y": 6
+ },
+ "id": 110,
+ "panels": [],
+ "title": "Usage",
+ "type": "row"
+ },
+ {
+ "datasource": {
+ "type": "prometheus",
+ "uid": "prometheus"
+ },
+ "description": "Claimed sessions over time. This is the closest thing to a count of students actively using EduIDE.",
+ "gridPos": {
+ "h": 8,
+ ```
</details> |
|
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📝 WalkthroughWalkthroughThe chart version changes to 2.2.0. Monitoring configuration now supports namespace-scoped Grafana dashboards, Prometheus alerts, Alertmanager notifications, webhook Secrets, and cert-manager metrics. The chart removes session namespace configuration and the session PodMonitor. ChangesMonitoring configuration and shared helpers
Alerting resources and rules
Overview dashboards and namespace filtering
Session detail dashboard
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to This change adds dashboards and alerting, but current configuration issues can produce incorrect session data, miss OOM or scrape failures, monitor unintended namespaces, or silently leave alerting absent despite being enabled. Merge should wait for these bounded monitoring and configuration issues to be fixed or explicitly accepted. Sequence Diagram(s)sequenceDiagram
participant Prometheus
participant Grafana
participant KubernetesMetrics
participant Alertmanager
participant NotificationWebhook
KubernetesMetrics->>Prometheus: expose monitored namespace metrics
Prometheus->>Grafana: serve dashboard query results
Prometheus->>Alertmanager: send firing alert
Alertmanager->>NotificationWebhook: deliver Slack or Discord notification
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (13 skipped: 13 unsupported.) ✨ Finishing Touches🧪 Generate unit tests (beta)
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Inline comments:
In `@charts/eduide-cluster/templates/monitoring/dashboard-session-detail.yaml`:
- Line 362: Update the dashboard panel’s volume-usage PromQL expression to scope
results to the selected $pod: join the
kubelet_volume_stats_used_bytes-to-capacity ratio with
kube_pod_spec_volumes_persistentvolumeclaims_info using the namespace and
persistentvolumeclaim labels, then apply max while filtering the pod label with
$pod. Preserve the existing $namespace filtering.
In `@charts/eduide-cluster/templates/monitoring/prometheusrule.yaml`:
- Around line 114-116: Update the EduIDEServiceScrapeDown Prometheus expression
to constrain the up metric selector with namespace=~"{{ $ns }}", while
preserving the existing job matcher and zero-value condition.
- Line 1: Validate the monitoring configuration before the PrometheusRule and
paired AlertmanagerConfig conditional rendering: if monitoring.alerting.enabled
is true while monitoring.enabled is false, fail the Helm render with a clear
configuration error; preserve normal rendering for valid configurations.
- Around line 159-161: Update the OOM-kill alert expression in the
PrometheusRule to avoid applying increase() to the gauge
kube_pod_container_status_last_terminated_reason. Use an available persistent
OOM event counter to calculate the hourly rate, or change the alert to evaluate
the current OOMKilled state while preserving the existing namespace, session,
and threshold filters.
In `@charts/eduide-cluster/templates/monitoring/servicemonitor-certmanager.yaml`:
- Around line 23-26: Update the ServiceMonitor template to select cert-manager
Services using configurable label values rather than serviceName; add those
selector-label settings in charts/eduide-cluster/values.yaml (lines 224-227),
reference them in
charts/eduide-cluster/templates/monitoring/servicemonitor-certmanager.yaml
(lines 23-26), and document the new settings in charts/eduide-cluster/README.md
(lines 73-75).
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📒 Files selected for processing (14)
charts/eduide-cluster/Chart.yamlcharts/eduide-cluster/README.mdcharts/eduide-cluster/templates/_helpers.tplcharts/eduide-cluster/templates/monitoring/alert-webhook-secret.yamlcharts/eduide-cluster/templates/monitoring/alertmanagerconfig.yamlcharts/eduide-cluster/templates/monitoring/dashboard-session-detail.yamlcharts/eduide-cluster/templates/monitoring/dashboard-session-startup.yamlcharts/eduide-cluster/templates/monitoring/dashboard-sessions.yamlcharts/eduide-cluster/templates/monitoring/dashboard-theiacloud.yamlcharts/eduide-cluster/templates/monitoring/podmonitor-sessions.yamlcharts/eduide-cluster/templates/monitoring/prometheusrule.yamlcharts/eduide-cluster/templates/monitoring/servicemonitor-certmanager.yamlcharts/eduide-cluster/values-example.yamlcharts/eduide-cluster/values.yaml
💤 Files with no reviewable changes (1)
- charts/eduide-cluster/templates/monitoring/podmonitor-sessions.yaml
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Review feedback. EduIDESessionOOMKillSpike ran increase() over kube_pod_container_status_last_terminated_reason, which Prometheus reports as a gauge holding only the most recent reason: a container that OOMs ten times reports the same 1 throughout, so the alert counted nothing reliable. It now counts kube_pod_container_status_restarts_total, a real counter, joined with and on() to containers whose last exit was an OOM kill - the same shape EduIDESessionCrashSpike already used. The session detail dashboard's workspace panel took a namespace-wide max. kubelet_volume_stats_* is keyed by claim rather than by pod, so on a dashboard scoped to one session it could report another student's full volume as this session's. Joined through kube_pod_spec_volumes_persistentvolumeclaims_info. EduIDEServiceScrapeDown had no namespace selector, so it could alert on a job outside the namespaces this chart monitors. Alerting enabled with monitoring disabled rendered neither the PrometheusRule nor the AlertmanagerConfig and reported success, which is the failure mode this whole change exists to remove. It now fails with a sentence, checked before the guard rather than inside it, where a configuration that renders nothing could not report itself. certManager.serviceName was inserted into ServiceMonitor.spec.selector.matchLabels, where it matches a label value and not metadata.name, so the name suggested something the field could not do. Replaced with certManager.selectorLabels. Both changed alert expressions were re-run against the live Prometheus: healthy zeros for the EduIDE namespaces, and the OOM join returns three series unrestricted, which is what proves the join itself works. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019qeiQRFu8xAMRYWPdZewjG
One cluster can host installations that belong to different people. Bonn and Mannheim both live on the eduide cluster and each has its own Discord, so a single receiver would have sent each of them the other's incidents. A channel may now name `environments`, a list of namespaces. Each scoped channel gets a sub-route matched on eduide_namespace, and first match wins. Anything no scoped channel claims goes to every channel, deliberately. A certificate expiring or the conversion webhook failing is cluster-scoped and belongs to no tenant namespace; dropping those for failing to match a tenant route would silently lose the alerts that matter most. The receiver bodies moved into _helpers.tpl. A Go template `define` may not sit inside an `if`, and the whole AlertmanagerConfig is guarded by one - sharing the definition also means the message format cannot drift between the catch-all receiver and the scoped ones. Channel names are now checked for uniqueness, since they become receiver names. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019qeiQRFu8xAMRYWPdZewjG
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What and why
The Grafana dashboards were broken in three ways, none of which a render test could catch, and all of which look like a data problem rather than a bug.
1. Every option in the namespace picker was a dead namespace.
dashboard-theiacloud.yamlcarried a hand-written list,theia,theia-staging,test1,test2,test3, and defaulted totest1. The real namespaces have beeneduide-test1and friends since 2.0.0, so the dashboard showed nothing whatever you selected. It is now a query over the namespaces bootstrap already derives from the environments, so it cannot go stale again.2. Four of the six panels would have been empty anyway. They selected on
service=~"theia-.*", a label that stopped existing when sessions stopped sitting behindtheia-*Services:0 series against the live cluster. Without the selector, 6.
3. The sessions PodMonitor has never produced a sample. It scrapes port
applicationon every session pod, but session pods are Theia IDEs serving HTML, so all 30 targets sit permanentlydownwithunsupported Content-Type "text/html"and ~1480 candidates are dropped per scrape cycle. Removed, withmonitoring.sessionNamespaces. Nothing is lost: session data comes from cAdvisor, kubelet and kube-state-metrics.New
EduIDE Sessions (
eduide-sessions) - sessions in use vs warm pool, usage by app image, starts per hour, startup latency, CPU and memory against limits, throttling, workspace bytes and inodes, pods per node, and an oldest-sessions table that deep-links into:EduIDE Session Detail (
eduide-session-detail) - one pod: headroom before the OOM kill, throttling, waiting reason, and how it last ended.16 alerts behind
monitoring.alerting.enabled, and anAlertmanagerConfigwith native Slack and Discord receivers (the CRD supportsdiscordConfigs, so no webhook shim). Onlycriticalandwarningreach the channels;minSeverityraises that cut-off without touching rules, and every threshold is a value.Session-level faults alert on rates across an environment, never per pod, and exit codes 137/143 are excluded. This platform runs student code: sessions OOM and crash during normal exercise work, and one notification per event is how a channel stops being read - at which point the platform is unmonitored however many rules exist.
A cert-manager ServiceMonitor. It exports certificate expiry but ships none, so nothing was watching the hand-renewed webview wildcard at all.
The one thing that will look wrong later
Alerts carry
namespace: eduide-systemregardless of the environment they concern. That is a routing artifact: the Prometheus Operator defaultsalertmanagerConfigMatcherStrategytoOnNamespaceand prependsnamespace = <the AlertmanagerConfig's own namespace>to every route it generates, so an alert must claim it to reach any receiver. The real environment iseduide_namespace, which is also what grouping and any silence must use. Documented invalues.yaml,_helpers.tpl, the deployment repo'sAGENTS.mdanddocs/monitoring-setup.md.Verification
helm lint, template with alerting on and offkubeconformagainst the real CRD schemas - PrometheusRule, AlertmanagerConfig, ServiceMonitor and PodMonitor all valid.values-example.yamlnow enables monitoring so CI actually covers them; left off they would render to nothing and never be checked, which is how theservice=~"theia-.*"rot survivedpromtool check rules: 16 rulestum-student. Seven return nothing; each was checked rather than assumed, and all seven are healthy zeros - the metrics and labels exist elsewhere on the cluster and theand on(...)join returns 30 series unrestrictedminSeverity, unsupported type, missingsecretKey, unsupplied secret, and the empty-namespace regex edge caseKnown
The session startup timer is lazily registered on the first session the REST service serves, so it does not exist after a restart until someone starts a session. An empty startup panel on a fresh environment is expected.
EduIDESessionStartupSlowcarries a traffic guard for the same reason: the quantiles are decaying and hold their last value when idle, so without it one slow start on a Friday would alert all weekend.Envoy Gateway exposes no metrics to this Prometheus, so there is no alert on 5xx or dropped WebSockets - the signal closest to what a student feels. Instrumenting it means scraping
envoy-gateway-system, which ontum-studentis a data plane shared with Artemis. Recorded rather than silently skipped.Still to do
Import both dashboards into live Grafana and confirm every panel draws, and fire a test alert into real channels. Needs EduIDE-deployment#132 merged and webhook URLs on the cluster Environment.
🤖 Generated with Claude Code
https://claude.ai/code/session_019qeiQRFu8xAMRYWPdZewjG
Summary by CodeRabbit
New Features
Documentation