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.

professional-infra/linux-operations-automation/Makefile

@@ -0,0 +1,95 @@
+# Linux Operations Automation Makefile
+
+.PHONY: help test run demo patch harden decommission lvm-check up down status logs validate clean lint scale-up-web scale-up-db scale-down-web scale-down-db fail-network fail-disk fail-service fail-node scenario-scaling help-scaling help-failure
+
+help: ## Show this help message
+	@echo "Linux Operations Automation"
+	@echo ""
+	@echo "Available commands:"
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "  %-18s %s\n", $$1, $$2}'
+
+test: ## Run offline validation checks
+	ansible-playbook -i inventory/hosts.ini --syntax-check playbooks/*.yml
+	ansible-lint
+
+run: ## Run provisioning against the configured inventory
+	ansible-playbook -i inventory/hosts.ini playbooks/provision.yml
+
+demo: ## Run a safe local demonstration without requiring live SSH hosts
+	SIMULATION_MODE=true bash ./scripts/simulate_failure.sh service 5 web
+
+patch: ## Apply patching workflow against the configured inventory
+	ansible-playbook -i inventory/hosts.ini playbooks/patch.yml
+
+harden: ## Apply hardening workflow against the configured inventory
+	ansible-playbook -i inventory/hosts.ini playbooks/hardening.yml
+
+decommission: ## Run decommissioning workflow against the configured inventory
+	ansible-playbook -i inventory/hosts.ini playbooks/decommission.yml
+
+lvm-check: ## Validate the AAP-style LVM resize workflow
+	ansible-playbook -i inventory/hosts.ini --syntax-check playbooks/lvm_resize.yml
+
+up: ## Start the optional local container scaffold
+	docker compose up -d
+
+down: ## Stop the optional local container scaffold
+	docker compose down
+
+status: ## Show local scaffold status and inventory hosts
+	docker compose ps
+	ansible -i inventory/hosts.ini --list-hosts all || echo "Inventory check failed"
+
+logs: ## Show local scaffold logs
+	docker compose logs -f --tail=100
+
+validate: ## Run all offline validation checks
+	$(MAKE) test
+	docker compose config --quiet
+
+clean: ## Clean up generated local logs and reports
+	rm -f logs/*.log reports/*.txt
+
+lint: ## Lint Ansible content
+	ansible-lint
+
+scale-up-web: ## Scale up web servers in simulation mode (usage: make scale-up-web COUNT=2)
+	SIMULATION_MODE=true bash ./scripts/simulate_scaling.sh up $(or $(COUNT),1) web
+
+scale-up-db: ## Scale up database servers in simulation mode (usage: make scale-up-db COUNT=1)
+	SIMULATION_MODE=true bash ./scripts/simulate_scaling.sh up $(or $(COUNT),1) db
+
+scale-down-web: ## Scale down web servers in simulation mode (usage: make scale-down-web COUNT=1)
+	SIMULATION_MODE=true bash ./scripts/simulate_scaling.sh down $(or $(COUNT),1) web
+
+scale-down-db: ## Scale down database servers in simulation mode (usage: make scale-down-db COUNT=1)
+	SIMULATION_MODE=true bash ./scripts/simulate_scaling.sh down $(or $(COUNT),1) db
+
+fail-network: ## Simulate network failure safely (usage: make fail-network DURATION=60)
+	SIMULATION_MODE=true bash ./scripts/simulate_failure.sh network $(or $(DURATION),60)
+
+fail-disk: ## Simulate disk pressure safely (usage: make fail-disk DURATION=120)
+	SIMULATION_MODE=true bash ./scripts/simulate_failure.sh disk $(or $(DURATION),120)
+
+fail-service: ## Simulate service failures safely (usage: make fail-service DURATION=30)
+	SIMULATION_MODE=true bash ./scripts/simulate_failure.sh service $(or $(DURATION),30)
+
+fail-node: ## Simulate node failure safely (usage: make fail-node DURATION=300)
+	SIMULATION_MODE=true bash ./scripts/simulate_failure.sh node $(or $(DURATION),300)
+
+scenario-scaling: ## Run scaling event syntax validation
+	ansible-playbook -i inventory/hosts.ini --syntax-check scenarios/scaling_event.yml
+
+help-scaling: ## Show scaling-related commands
+	@echo "Scaling Commands:"
+	@echo "  make scale-up-web COUNT=2"
+	@echo "  make scale-up-db COUNT=1"
+	@echo "  make scale-down-web COUNT=1"
+	@echo "  make scale-down-db COUNT=1"
+
+help-failure: ## Show failure simulation commands
+	@echo "Failure Simulation Commands:"
+	@echo "  make fail-network DURATION=60"
+	@echo "  make fail-disk DURATION=120"
+	@echo "  make fail-service DURATION=30"
+	@echo "  make fail-node DURATION=300"