Add loki config

Author: lukazuljevic

ansible/monitoring/playbook.yml

@@ -37,6 +37,6 @@
     #   vars:
     #     alertmanager_domain: "{{ alertmanager_domain }}"
     - role: grafana
-    # - role: loki
-    #   vars:
-    #     loki_domain: "{{ loki_domain }}"
+    - role: loki
+       vars:
+         loki_domain: "{{ loki_domain }}"

ansible/monitoring/roles/loki/files/loki-config.yaml

@@ -0,0 +1,34 @@
+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+  grpc_listen_port: 9096
+
+common:
+  instance_addr: 127.0.0.1
+  path_prefix: /loki
+  storage:
+    filesystem:
+      chunks_directory: /loki/chunks
+      rules_directory: /loki/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+schema_config:
+  configs:
+    - from: 2020-10-24
+      store: tsdb
+      object_store: filesystem
+      schema: v13
+      index:
+        prefix: index_
+        period: 24h
+
+compactor:
+  working_directory: /loki/boltdb-shipper-compactor
+  retention_enabled: true
+
+limits_config:
+  retention_period: 672h # 28 days

ansible/monitoring/roles/loki/tasks/main.yml

@@ -1,20 +1,34 @@
 ---
+- name: Create Loki config directory
+      file:
+        path: /opt/loki
+        state: directory
+        mode: '0755'
+
+- name: Copy Loki config
+      copy:
+        src: "{{ role_path }}/files/loki-config.yaml"
+        dest: "/opt/loki/local-config.yaml"
+
 - name: Create loki docker container
   docker_container:
     name: loki
     image: grafana/loki:latest
     pull: yes
     recreate: true
     restart_policy: unless-stopped
-    command:
-      - "--providers.docker=true"
-      - "--providers.docker.exposedbydefault=false"
-      - "--providers.docker.network=traefiknet"
-      - "--entrypoints.web.address=:80"
-      - "--accesslog=true"
-    ports:
-      - "80:80"
+    command: -config.file=/etc/loki/local-config.yaml
     volumes:
-      - "/var/run/docker.sock:/var/run/docker.sock:ro"
+      - "/opt/loki/local-config.yaml:/etc/loki/local-config.yaml"
+      - "loki_data:/loki"
     networks:
       - name: traefiknet
+    lables:
+      traefik.enable: "true"
+      traefik.http.routers.loki.rule: "Host(`{{ loki_domain }}`)"
+      traefik.http.services.loki.loadbalancer.server.port: "3100"
+      traefik.http.services.loki.loadbalancer.server.scheme: "http"
+      traefik.http.middlewares.loki-retry.retry.attempts: "5"
+      traefik.http.middlewares.loki-retry.retry.initialinterval: "100ms"
+      traefik.http.middlewares.loki-cors.headers.accesscontrolallowmethods: "*"
+      traefik.http.routers.loki.middlewares: "loki-retry, loki-cors"