add loki

a log storage platform

Caddyfile

@@ -21,3 +21,6 @@
 	reverse_proxy grafana:3000
 }
 
+:3100 {
+	reverse_proxy loki:3100
+}

compose-server.yml

@@ -4,14 +4,18 @@ services:
     image: caddy:latest
     restart: unless-stopped
     ports:
+      # HTTP
       - 80:80
       - 443:443
       - '443:443/udp'
+      # Grafana
       - 3000:3000
+      # Loki
+      - 3100:3100
     volumes:
       - ./Caddyfile:/etc/caddy/Caddyfile
 
-  # metrics collector
+  # Metrics collector
   prometheus:
     image: prom/prometheus:latest
     expose:
@@ -24,6 +28,12 @@ services:
       - caddy
     command: --web.enable-lifecycle --config.file=/etc/prometheus/prometheus.yml
 
+  loki:
+    image: grafana/loki:2.9.2
+    expose:
+    - 3100
+    command: -config.file=/etc/loki/local-config.yaml
+
   # log viewer
   grafana:
     image: grafana/grafana:latest
@@ -35,6 +45,8 @@ services:
       - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
       - GF_AUTH_DISABLE_LOGIN_FORM=true
       - GF_FEATURE_TOGGLES_ENABLE=traceqlEditor
+    expose:
+      - 3000
     depends_on:
       - prometheus
 

grafana.yaml

@@ -13,3 +13,12 @@ datasources:
   editable: false
   jsonData:
     httpMethod: GET
+- name: Loki
+  type: loki
+  access: proxy 
+  orgId: 1
+  url: http://loki:3100
+  basicAuth: false
+  isDefault: false
+  version: 1
+  editable: false