🎉 Complete Nomad monitoring infrastructure project

✅ Major Achievements:
- Deployed complete observability stack (Prometheus + Loki + Grafana)
- Established rapid troubleshooting capabilities (3-step process)
- Created heatmap dashboard for log correlation analysis
- Unified logging system (systemd-journald across all nodes)
- Configured API access with Service Account tokens

🧹 Project Cleanup:
- Intelligent cleanup based on Git modification frequency
- Organized files into proper directory structure
- Removed deprecated webhook deployment scripts
- Eliminated 70+ temporary/test files (43% reduction)

📊 Infrastructure Status:
- Prometheus: 13 nodes monitored
- Loki: 12 nodes logging
- Grafana: Heatmap dashboard + API access
- Promtail: Deployed to 12/13 nodes

🚀 Ready for Terraform transition (静默一周后切换)

Project Status: COMPLETED ✅

ansible/templates/onecloud1-server-secure.hcl.j2

@@ -0,0 +1,71 @@
+# Nomad 服务器安全配置 - OneCloud1 节点
+datacenter = "dc1"
+data_dir = "/opt/nomad/data"
+plugin_dir = "/opt/nomad/plugins"
+log_level = "INFO"
+name = "onecloud1"
+
+# 安全绑定 - 只绑定到 Tailscale 接口
+bind_addr = "onecloud1.tailnet-68f9.ts.net"
+
+addresses {
+  http = "onecloud1.tailnet-68f9.ts.net"
+  rpc  = "onecloud1.tailnet-68f9.ts.net"
+  serf = "onecloud1.tailnet-68f9.ts.net"
+}
+
+advertise {
+  http = "onecloud1.tailnet-68f9.ts.net:4646"
+  rpc  = "onecloud1.tailnet-68f9.ts.net:4647"
+  serf = "onecloud1.tailnet-68f9.ts.net:4648"
+}
+
+ports {
+  http = 4646
+  rpc  = 4647
+  serf = 4648
+}
+
+server {
+  enabled = true
+  bootstrap_expect = 7
+  
+  # 服务器发现配置
+  server_join {
+    retry_join = [
+      "semaphore.tailnet-68f9.ts.net:4647",
+      "ash1d.tailnet-68f9.ts.net:4647", 
+      "ash2e.tailnet-68f9.ts.net:4647",
+      "ch2.tailnet-68f9.ts.net:4647",
+      "ch3.tailnet-68f9.ts.net:4647",
+      "onecloud1.tailnet-68f9.ts.net:4647",
+      "de.tailnet-68f9.ts.net:4647"
+    ]
+    retry_interval = "15s"
+    retry_max = 3
+  }
+}
+
+# 安全的 Consul 配置
+consul {
+  address = "127.0.0.1:8500"
+  server_service_name = "nomad"
+  client_service_name = "nomad-client"
+  auto_advertise = true
+  server_auto_join = true
+  client_auto_join = true
+}
+
+# Vault 配置（暂时禁用）
+vault {
+  enabled = false
+}
+
+# 遥测配置
+telemetry {
+  collection_interval = "1s"
+  disable_hostname = false
+  prometheus_metrics = true
+  publish_allocation_metrics = true
+  publish_node_metrics = true
+}