Add Grafana dashboards and metrics collection for zot and minikube

Phase 0 followup:
- Enable zot native metrics endpoint (/metrics)
- Add zot scraping to Alloy config
- Create zot Grafana dashboard (status, requests, latency, memory)
- Create minikube_metrics role (collects cluster health metrics)
- Create minikube Grafana dashboard (status, pod/namespace counts, logs)
- Update indri-services-check with minikube-metrics checks

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Erich Blume 2026-01-18 11:53:04 -08:00
commit 3337392b55
12 changed files with 1107 additions and 0 deletions

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@ -107,6 +107,8 @@
tags: podman
- role: minikube
tags: minikube
- role: minikube_metrics
tags: minikube_metrics
- role: plex_metrics
tags: plex_metrics
- role: postgresql

View file

@ -81,6 +81,10 @@ alloy_plex_logs:
# Enable log collection (requires Loki to be running)
alloy_collect_logs: true
# Zot registry metrics collection
alloy_collect_zot: true
alloy_zot_metrics_url: "http://localhost:5050/metrics"
# PostgreSQL metrics collection
alloy_collect_postgres: true
alloy_postgres_host: localhost

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@ -54,6 +54,18 @@ prometheus.scrape "postgresql" {
}
{% endif %}
{% if alloy_collect_zot | default(false) %}
// ============== ZOT REGISTRY METRICS ==============
// Scrape Zot's native metrics endpoint
prometheus.scrape "zot" {
targets = [{"__address__" = "localhost:5050"}]
metrics_path = "/metrics"
forward_to = [prometheus.relabel.instance.receiver]
scrape_interval = "{{ alloy_scrape_interval }}"
}
{% endif %}
{% if alloy_collect_logs %}
// ============== LOG COLLECTION ==============

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"unit": "bytes"
},
"overrides": []
},
"gridPos": { "h": 8, "w": 12, "x": 12, "y": 12 },
"id": 8,
"options": {
"legend": {
"calcs": ["lastNotNull"],
"displayMode": "table",
"placement": "bottom",
"showLegend": true
},
"tooltip": { "mode": "multi", "sort": "desc" }
},
"pluginVersion": "10.0.0",
"targets": [
{
"datasource": { "type": "prometheus", "uid": "prometheus" },
"expr": "process_resident_memory_bytes{job=\"zot\"}",
"legendFormat": "Resident Memory",
"refId": "A"
},
{
"datasource": { "type": "prometheus", "uid": "prometheus" },
"expr": "go_memstats_heap_alloc_bytes{job=\"zot\"}",
"legendFormat": "Heap Alloc",
"refId": "B"
},
{
"datasource": { "type": "prometheus", "uid": "prometheus" },
"expr": "go_memstats_heap_inuse_bytes{job=\"zot\"}",
"legendFormat": "Heap In Use",
"refId": "C"
}
],
"title": "Memory Over Time",
"type": "timeseries"
}
],
"refresh": "30s",
"schemaVersion": 38,
"tags": ["zot", "registry", "oci"],
"templating": {
"list": []
},
"time": {
"from": "now-6h",
"to": "now"
},
"timepicker": {},
"timezone": "",
"title": "Zot Container Registry",
"uid": "zot",
"version": 1,
"weekStart": ""
}

View file

@ -0,0 +1,5 @@
---
minikube_metrics_dir: /opt/homebrew/var/node_exporter/textfile
minikube_metrics_script: /Users/erichblume/bin/minikube-metrics
minikube_metrics_interval: 60 # seconds between metric collection
minikube_metrics_log_dir: /opt/homebrew/var/log

View file

@ -0,0 +1,6 @@
---
- name: Reload minikube-metrics
ansible.builtin.shell: |
launchctl unload ~/Library/LaunchAgents/mcquack.eblume.minikube-metrics.plist 2>/dev/null || true
launchctl load ~/Library/LaunchAgents/mcquack.eblume.minikube-metrics.plist
changed_when: true

View file

@ -0,0 +1,43 @@
---
- name: Ensure metrics directory exists
ansible.builtin.file:
path: "{{ minikube_metrics_dir }}"
state: directory
mode: '0755'
- name: Ensure log directory exists
ansible.builtin.file:
path: "{{ minikube_metrics_log_dir }}"
state: directory
mode: '0755'
- name: Ensure bin directory exists
ansible.builtin.file:
path: "{{ minikube_metrics_script | dirname }}"
state: directory
mode: '0755'
- name: Deploy minikube-metrics script
ansible.builtin.template:
src: minikube-metrics.sh.j2
dest: "{{ minikube_metrics_script }}"
mode: '0755'
- name: Deploy minikube-metrics LaunchAgent plist
ansible.builtin.template:
src: minikube-metrics.plist.j2
dest: ~/Library/LaunchAgents/mcquack.eblume.minikube-metrics.plist
mode: '0644'
notify: Reload minikube-metrics
- name: Check if minikube-metrics LaunchAgent is loaded
ansible.builtin.command: launchctl list mcquack.eblume.minikube-metrics
register: minikube_metrics_launchctl_check
changed_when: false
failed_when: false
- name: Load minikube-metrics LaunchAgent if not loaded
ansible.builtin.command: launchctl load ~/Library/LaunchAgents/mcquack.eblume.minikube-metrics.plist
when: minikube_metrics_launchctl_check.rc != 0
changed_when: true
failed_when: false

View file

@ -0,0 +1,21 @@
<?xml version="1.0" encoding="UTF-8"?>
<!-- {{ ansible_managed }} -->
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>mcquack.eblume.minikube-metrics</string>
<key>ProgramArguments</key>
<array>
<string>{{ minikube_metrics_script }}</string>
</array>
<key>StartInterval</key>
<integer>{{ minikube_metrics_interval }}</integer>
<key>RunAtLoad</key>
<true/>
<key>StandardErrorPath</key>
<string>{{ minikube_metrics_log_dir }}/mcquack.minikube-metrics.err.log</string>
<key>StandardOutPath</key>
<string>{{ minikube_metrics_log_dir }}/mcquack.minikube-metrics.out.log</string>
</dict>
</plist>

View file

@ -0,0 +1,57 @@
#!/bin/bash
# {{ ansible_managed }}
# Collects minikube/kubernetes metrics for node_exporter textfile collector
set -euo pipefail
OUTPUT_FILE="{{ minikube_metrics_dir }}/minikube.prom"
TEMP_FILE="${OUTPUT_FILE}.tmp"
# Start output file
cat > "$TEMP_FILE" << 'HEADER'
# HELP minikube_up Minikube cluster is running
# TYPE minikube_up gauge
# HELP minikube_apiserver_up Kubernetes API server is responding
# TYPE minikube_apiserver_up gauge
# HELP minikube_node_count Number of nodes in the cluster
# TYPE minikube_node_count gauge
# HELP minikube_pod_count Number of pods in the cluster
# TYPE minikube_pod_count gauge
# HELP minikube_namespace_count Number of namespaces in the cluster
# TYPE minikube_namespace_count gauge
HEADER
# Check if minikube is running
if minikube status --format='{{.Host}}' 2>/dev/null | grep -q "Running"; then
echo "minikube_up 1" >> "$TEMP_FILE"
else
echo "minikube_up 0" >> "$TEMP_FILE"
echo "minikube_apiserver_up 0" >> "$TEMP_FILE"
echo "minikube_node_count 0" >> "$TEMP_FILE"
echo "minikube_pod_count 0" >> "$TEMP_FILE"
echo "minikube_namespace_count 0" >> "$TEMP_FILE"
mv "$TEMP_FILE" "$OUTPUT_FILE"
exit 0
fi
# Check API server health
if kubectl get --raw /healthz >/dev/null 2>&1; then
echo "minikube_apiserver_up 1" >> "$TEMP_FILE"
else
echo "minikube_apiserver_up 0" >> "$TEMP_FILE"
fi
# Get node count
NODE_COUNT=$(kubectl get nodes --no-headers 2>/dev/null | wc -l | tr -d ' ')
echo "minikube_node_count ${NODE_COUNT:-0}" >> "$TEMP_FILE"
# Get pod count (all namespaces)
POD_COUNT=$(kubectl get pods -A --no-headers 2>/dev/null | wc -l | tr -d ' ')
echo "minikube_pod_count ${POD_COUNT:-0}" >> "$TEMP_FILE"
# Get namespace count
NS_COUNT=$(kubectl get namespaces --no-headers 2>/dev/null | wc -l | tr -d ' ')
echo "minikube_namespace_count ${NS_COUNT:-0}" >> "$TEMP_FILE"
# Atomic move
mv "$TEMP_FILE" "$OUTPUT_FILE"

View file

@ -14,6 +14,12 @@
"level": "info"
},
"extensions": {
"metrics": {
"enable": true,
"prometheus": {
"path": "/metrics"
}
},
"sync": {
"enable": true,
"registries": [

View file

@ -55,6 +55,7 @@ check_service "postgresql" "ssh indri 'brew services list | grep postgresql | gr
check_service "miniflux" "ssh indri 'brew services list | grep miniflux | grep started'"
check_service "zot" "ssh indri 'launchctl list | grep mcquack.eblume.zot | grep -v \"^-\"'"
check_service "zot-metrics" "ssh indri 'launchctl list | grep zot-metrics | grep -v \"^-\"'"
check_service "minikube-metrics" "ssh indri 'launchctl list | grep minikube-metrics | grep -v \"^-\"'"
echo ""
echo "HTTP endpoints (via Tailscale):"
@ -74,6 +75,7 @@ check_service "PostgreSQL" "ssh indri '/opt/homebrew/opt/postgresql@18/bin/pg_is
# Zot registry (via Tailscale service)
check_http "Zot Registry" "https://registry.tail8d86e.ts.net/v2/_catalog"
check_service "Zot metrics file" "ssh indri 'test -f /opt/homebrew/var/node_exporter/textfile/zot.prom'"
check_service "Minikube metrics file" "ssh indri 'test -f /opt/homebrew/var/node_exporter/textfile/minikube.prom'"
echo ""
echo "Kubernetes cluster:"