feat: Add Prometheus Unix exporter to Alloy for host metrics collection, update Docker Compose volumes, and enable Keepalived daemon mode.

vm1/alloy-config.alloy

@@ -55,3 +55,23 @@ loki.write "loki" {
     url = "http://192.168.1.200:3100/loki/api/v1/push"
   }
 }
+
+// Collect system metrics
+prometheus.exporter.unix "host" {
+  procfs_path = "/host/proc"
+  sysfs_path  = "/host/sys"
+  rootfs_path = "/host/root"
+}
+
+// Scrape metrics from the unix exporter
+prometheus.scrape "host" {
+  targets    = prometheus.exporter.unix.host.targets
+  forward_to = [prometheus.remote_write.mimir.receiver]
+}
+
+// Write metrics to Mimir/Prometheus
+prometheus.remote_write "mimir" {
+  endpoint {
+    url = "http://192.168.1.200:9090/api/v1/write"
+  }
+}

vm1/docker-compose.yml

@@ -153,7 +153,7 @@ services:
     network_mode: host
     volumes:
       - ./keepalived-master.conf:/etc/keepalived/keepalived.conf:ro
-    command: sh -c "apk add --no-cache keepalived && keepalived -n -l -f /etc/keepalived/keepalived.conf"
+    command: sh -c "apk add --no-cache keepalived && keepalived -n -D -l -f /etc/keepalived/keepalived.conf"
   alloy:
     image: grafana/alloy:latest
     container_name: alloy
@@ -165,6 +165,9 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock:ro
       - /etc/localtime:/etc/localtime:ro
       - /etc/timezone:/etc/timezone:ro
+      - /proc:/host/proc:ro
+      - /sys:/host/sys:ro
+      - /:/host/root:ro
     command:
       - run
       - --server.http.listen-addr=0.0.0.0:12345

vm2/alloy-config.alloy

@@ -55,3 +55,23 @@ loki.write "loki" {
     url = "http://192.168.1.200:3100/loki/api/v1/push"
   }
 }
+
+// Collect system metrics
+prometheus.exporter.unix "host" {
+  procfs_path = "/host/proc"
+  sysfs_path  = "/host/sys"
+  rootfs_path = "/host/root"
+}
+
+// Scrape metrics from the unix exporter
+prometheus.scrape "host" {
+  targets    = prometheus.exporter.unix.host.targets
+  forward_to = [prometheus.remote_write.mimir.receiver]
+}
+
+// Write metrics to Mimir/Prometheus
+prometheus.remote_write "mimir" {
+  endpoint {
+    url = "http://192.168.1.200:9090/api/v1/write"
+  }
+}

vm2/docker-compose.yml

@@ -127,7 +127,7 @@ services:
     network_mode: host
     volumes:
       - ./keepalived-backup.conf:/etc/keepalived/keepalived.conf:ro
-    command: sh -c "apk add --no-cache keepalived && keepalived -n -l -f /etc/keepalived/keepalived.conf"
+    command: sh -c "apk add --no-cache keepalived && keepalived -n -D -l -f /etc/keepalived/keepalived.conf"
   alloy:
     image: grafana/alloy:latest
     container_name: alloy
@@ -139,6 +139,9 @@ services:
       - /var/run/docker.sock:/var/run/docker.sock:ro
       - /etc/localtime:/etc/localtime:ro
       - /etc/timezone:/etc/timezone:ro
+      - /proc:/host/proc:ro
+      - /sys:/host/sys:ro
+      - /:/host/root:ro
     command:
       - run
       - --server.http.listen-addr=0.0.0.0:12345