Initial CV-aligned infrastructure portfolio

Rework portfolio around Linux operations, Zabbix monitoring, migration validation, and ELK/Grafana log observability. Add AAP-style LVM resize workflow, Zabbix server/proxy/agent automation assets, Linux/AIX monitoring templates, and updated validation CI.
2026-05-04 17:37:24 +00:00
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+# Log Observability ELK/Grafana Architecture
+
+## Components
+
+- Filebeat: tails sample and container logs.
+- Logstash: receives and processes log events.
+- Elasticsearch: stores searchable observability data.
+- Kibana: supports log exploration and dashboards.
+- Grafana: provides operational dashboards.
+- Alert rules: document symptoms, thresholds, and severity.
+- Incident simulation: generates controlled failure signals.
+
+## Data Flow
+
+```
+Log source -> Filebeat -> Logstash -> Elasticsearch -> Kibana
+                                            |
+                                            v
+                                         Grafana
+```
+
+Incident exercises follow this flow:
+
+```
+Operator -> incident_simulation.sh -> logs/incident_simulation.log -> Filebeat -> Logstash -> alerts/dashboards
+```
+
+## Notes
+
+This is a local demonstration stack, not a production Elasticsearch deployment. A production version would add dedicated nodes, TLS, secret management, retention policies, index lifecycle management, and external alert delivery.