feat: send docker logs to loki

abra.sh

@@ -12,7 +12,7 @@ export PROMETHEUS_YML_VERSION=v2
 export MATRIX_ALERTMANAGER_CONFIG_VERSION=e
 export MATRIX_ALERTMANAGER_ENTRYPOINT_VERSION=a
 export GRAFANA_ALERTS_NODE_VERSION=v1c
-export CONFIG_ALLOY_VERSION=v5
+export CONFIG_ALLOY_VERSION=v6
 
 # creates a default prometheus scrape config for a given node
 add_node(){

config.alloy.tmpl

@@ -3,6 +3,10 @@ logging {
   format = "logfmt"
 }
 
+discovery.docker "linux" {
+  host = "unix:///var/run/docker.sock"
+}
+
 prometheus.exporter.cadvisor "docker" {
 }
 
@@ -34,3 +38,21 @@ prometheus.remote_write "prometheus" {
     }
   }
 }
+
+loki.source.docker "docker" {
+  host       = "unix:///var/run/docker.sock"
+  targets    = discovery.docker.linux.targets
+  labels     = {"app" = "docker"}
+  forward_to = [loki.write.loki.receiver]
+}
+
+loki.write "loki" {
+  endpoint {
+    url = "{{ env "LOKI_PUSH_URL" }}"
+
+    basic_auth {
+      username = "admin"
+      password = "{{ secret "basic_auth" }}"
+    }
+  }
+}