|
| 1 | +# Centralized Monitoring Aggregation |
| 2 | + |
| 3 | +## Overview |
| 4 | +This guide provides detailed instructions for implementing centralized monitoring aggregation in multi-region Kubernetes deployments, ensuring comprehensive observability across all regions. |
| 5 | + |
| 6 | +## Prerequisites |
| 7 | +- Multi-region Kubernetes clusters |
| 8 | +- kubectl configured |
| 9 | +- Helm installed |
| 10 | +- Basic understanding of monitoring concepts |
| 11 | +- Access to create and modify resources |
| 12 | + |
| 13 | +## Prometheus Federation Setup |
| 14 | + |
| 15 | +### 1. Install Prometheus |
| 16 | +```bash |
| 17 | +# Add Helm repository |
| 18 | +helm repo add prometheus-community https://prometheus-community.github.io/helm-charts |
| 19 | +helm repo update |
| 20 | + |
| 21 | +# Install Prometheus |
| 22 | +helm install prometheus prometheus-community/kube-prometheus-stack \ |
| 23 | + --namespace monitoring \ |
| 24 | + --set prometheus.prometheusSpec.serviceMonitorSelectorNilUsesHelmValues=false \ |
| 25 | + --set prometheus.prometheusSpec.podMonitorSelectorNilUsesHelmValues=false \ |
| 26 | + --set prometheus.prometheusSpec.ruleSelectorNilUsesHelmValues=false \ |
| 27 | + --set grafana.enabled=true |
| 28 | +``` |
| 29 | + |
| 30 | +### 2. Configure Federation |
| 31 | +```yaml |
| 32 | +# prometheus-federation.yaml |
| 33 | +apiVersion: v1 |
| 34 | +kind: ConfigMap |
| 35 | +metadata: |
| 36 | + name: prometheus-federation |
| 37 | + namespace: monitoring |
| 38 | +data: |
| 39 | + prometheus.yml: | |
| 40 | + global: |
| 41 | + scrape_interval: 15s |
| 42 | + evaluation_interval: 15s |
| 43 | + scrape_configs: |
| 44 | + - job_name: 'federate' |
| 45 | + honor_labels: true |
| 46 | + metrics_path: '/federate' |
| 47 | + params: |
| 48 | + 'match[]': |
| 49 | + - '{job="prometheus"}' |
| 50 | + - '{job="node-exporter"}' |
| 51 | + - '{job="kube-state-metrics"}' |
| 52 | + static_configs: |
| 53 | + - targets: |
| 54 | + - 'prometheus-region-1.monitoring.svc.cluster.local:9090' |
| 55 | + - 'prometheus-region-2.monitoring.svc.cluster.local:9090' |
| 56 | + - 'prometheus-region-3.monitoring.svc.cluster.local:9090' |
| 57 | +``` |
| 58 | +
|
| 59 | +## Thanos Setup |
| 60 | +
|
| 61 | +### 1. Install Thanos |
| 62 | +```bash |
| 63 | +# Add Helm repository |
| 64 | +helm repo add bitnami https://charts.bitnami.com/bitnami |
| 65 | +helm repo update |
| 66 | + |
| 67 | +# Install Thanos |
| 68 | +helm install thanos bitnami/thanos \ |
| 69 | + --namespace monitoring \ |
| 70 | + --set objstore.config=| |
| 71 | + type: S3 |
| 72 | + config: |
| 73 | + bucket: thanos-data |
| 74 | + endpoint: s3.amazonaws.com |
| 75 | + access_key: ${AWS_ACCESS_KEY_ID} |
| 76 | + secret_key: ${AWS_SECRET_ACCESS_KEY} |
| 77 | +``` |
| 78 | +
|
| 79 | +### 2. Configure Thanos Components |
| 80 | +```yaml |
| 81 | +# thanos-config.yaml |
| 82 | +apiVersion: apps/v1 |
| 83 | +kind: Deployment |
| 84 | +metadata: |
| 85 | + name: thanos-query |
| 86 | + namespace: monitoring |
| 87 | +spec: |
| 88 | + replicas: 2 |
| 89 | + selector: |
| 90 | + matchLabels: |
| 91 | + app: thanos-query |
| 92 | + template: |
| 93 | + metadata: |
| 94 | + labels: |
| 95 | + app: thanos-query |
| 96 | + spec: |
| 97 | + containers: |
| 98 | + - name: thanos-query |
| 99 | + image: thanosio/thanos:v0.28.0 |
| 100 | + args: |
| 101 | + - query |
| 102 | + - --http-address=0.0.0.0:10902 |
| 103 | + - --grpc-address=0.0.0.0:10901 |
| 104 | + - --store=thanos-store.monitoring.svc.cluster.local:10901 |
| 105 | + - --store=thanos-sidecar-region-1.monitoring.svc.cluster.local:10901 |
| 106 | + - --store=thanos-sidecar-region-2.monitoring.svc.cluster.local:10901 |
| 107 | + - --store=thanos-sidecar-region-3.monitoring.svc.cluster.local:10901 |
| 108 | + ports: |
| 109 | + - name: http |
| 110 | + containerPort: 10902 |
| 111 | + - name: grpc |
| 112 | + containerPort: 10901 |
| 113 | +``` |
| 114 | +
|
| 115 | +## Grafana Configuration |
| 116 | +
|
| 117 | +### 1. Configure Data Sources |
| 118 | +```yaml |
| 119 | +# grafana-datasources.yaml |
| 120 | +apiVersion: v1 |
| 121 | +kind: ConfigMap |
| 122 | +metadata: |
| 123 | + name: grafana-datasources |
| 124 | + namespace: monitoring |
| 125 | +data: |
| 126 | + prometheus.yaml: | |
| 127 | + apiVersion: 1 |
| 128 | + datasources: |
| 129 | + - name: Prometheus |
| 130 | + type: prometheus |
| 131 | + url: http://prometheus-server.monitoring.svc.cluster.local |
| 132 | + access: proxy |
| 133 | + isDefault: true |
| 134 | + - name: Thanos |
| 135 | + type: prometheus |
| 136 | + url: http://thanos-query.monitoring.svc.cluster.local:10902 |
| 137 | + access: proxy |
| 138 | +``` |
| 139 | +
|
| 140 | +### 2. Create Global Dashboard |
| 141 | +```yaml |
| 142 | +# global-dashboard.yaml |
| 143 | +apiVersion: integreatly.org/v1alpha1 |
| 144 | +kind: GrafanaDashboard |
| 145 | +metadata: |
| 146 | + name: global-monitoring |
| 147 | + namespace: monitoring |
| 148 | +spec: |
| 149 | + json: | |
| 150 | + { |
| 151 | + "dashboard": { |
| 152 | + "title": "Global Monitoring", |
| 153 | + "panels": [ |
| 154 | + { |
| 155 | + "title": "Cluster Status", |
| 156 | + "type": "table", |
| 157 | + "datasource": "Thanos", |
| 158 | + "targets": [ |
| 159 | + { |
| 160 | + "expr": "kube_cluster_status", |
| 161 | + "legendFormat": "{{region}}" |
| 162 | + } |
| 163 | + ] |
| 164 | + }, |
| 165 | + { |
| 166 | + "title": "Resource Usage", |
| 167 | + "type": "graph", |
| 168 | + "datasource": "Thanos", |
| 169 | + "targets": [ |
| 170 | + { |
| 171 | + "expr": "sum(rate(container_cpu_usage_seconds_total[5m])) by (region)", |
| 172 | + "legendFormat": "CPU {{region}}" |
| 173 | + }, |
| 174 | + { |
| 175 | + "expr": "sum(container_memory_usage_bytes) by (region)", |
| 176 | + "legendFormat": "Memory {{region}}" |
| 177 | + } |
| 178 | + ] |
| 179 | + }, |
| 180 | + { |
| 181 | + "title": "Request Rate", |
| 182 | + "type": "graph", |
| 183 | + "datasource": "Thanos", |
| 184 | + "targets": [ |
| 185 | + { |
| 186 | + "expr": "sum(rate(http_requests_total[5m])) by (region)", |
| 187 | + "legendFormat": "{{region}}" |
| 188 | + } |
| 189 | + ] |
| 190 | + } |
| 191 | + ] |
| 192 | + } |
| 193 | + } |
| 194 | +``` |
| 195 | +
|
| 196 | +## Alerting Configuration |
| 197 | +
|
| 198 | +### 1. Configure Alertmanager |
| 199 | +```yaml |
| 200 | +# alertmanager-config.yaml |
| 201 | +apiVersion: v1 |
| 202 | +kind: ConfigMap |
| 203 | +metadata: |
| 204 | + name: alertmanager-config |
| 205 | + namespace: monitoring |
| 206 | +data: |
| 207 | + alertmanager.yml: | |
| 208 | + global: |
| 209 | + resolve_timeout: 5m |
| 210 | + route: |
| 211 | + group_by: ['alertname', 'region'] |
| 212 | + group_wait: 30s |
| 213 | + group_interval: 5m |
| 214 | + repeat_interval: 4h |
| 215 | + receiver: 'slack' |
| 216 | + receivers: |
| 217 | + - name: 'slack' |
| 218 | + slack_configs: |
| 219 | + - api_url: '${SLACK_WEBHOOK_URL}' |
| 220 | + channel: '#alerts' |
| 221 | + send_resolved: true |
| 222 | +``` |
| 223 | +
|
| 224 | +### 2. Configure Alert Rules |
| 225 | +```yaml |
| 226 | +# alert-rules.yaml |
| 227 | +apiVersion: monitoring.coreos.com/v1 |
| 228 | +kind: PrometheusRule |
| 229 | +metadata: |
| 230 | + name: global-alerts |
| 231 | + namespace: monitoring |
| 232 | +spec: |
| 233 | + groups: |
| 234 | + - name: global |
| 235 | + rules: |
| 236 | + - alert: HighErrorRate |
| 237 | + expr: sum(rate(http_requests_total{status=~"5.."}[5m])) by (region) / sum(rate(http_requests_total[5m])) by (region) > 0.01 |
| 238 | + for: 5m |
| 239 | + labels: |
| 240 | + severity: critical |
| 241 | + annotations: |
| 242 | + summary: High error rate in {{ $labels.region }} |
| 243 | + description: Error rate is above 1% in {{ $labels.region }} |
| 244 | + - alert: HighLatency |
| 245 | + expr: histogram_quantile(0.95, sum(rate(http_request_duration_seconds_bucket[5m])) by (le, region)) > 1 |
| 246 | + for: 5m |
| 247 | + labels: |
| 248 | + severity: warning |
| 249 | + annotations: |
| 250 | + summary: High latency in {{ $labels.region }} |
| 251 | + description: 95th percentile latency is above 1s in {{ $labels.region }} |
| 252 | +``` |
| 253 | +
|
| 254 | +## Best Practices |
| 255 | +
|
| 256 | +### 1. Monitoring Configuration |
| 257 | +- Set appropriate scrape intervals |
| 258 | +- Configure retention policies |
| 259 | +- Monitor resource usage |
| 260 | +- Regular review |
| 261 | +- Document configurations |
| 262 | +
|
| 263 | +### 2. Data Management |
| 264 | +- Implement data retention |
| 265 | +- Configure backup strategy |
| 266 | +- Monitor storage usage |
| 267 | +- Regular cleanup |
| 268 | +- Document procedures |
| 269 | +
|
| 270 | +### 3. Alert Management |
| 271 | +- Set meaningful thresholds |
| 272 | +- Configure notification channels |
| 273 | +- Regular review |
| 274 | +- Document procedures |
| 275 | +- Update configurations |
| 276 | +
|
| 277 | +## Next Steps |
| 278 | +1. Monitor system performance |
| 279 | +2. Optimize configurations |
| 280 | +3. Implement backup strategy |
| 281 | +4. Regular reviews |
| 282 | +5. Documentation |
0 commit comments