Add loki service

playbooks/roles/loki/handlers/main.yml

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+---
+- name: Restart service {{ role_name }}
+  ansible.builtin.include_tasks: tasks/restart-service.yml

playbooks/roles/loki/tasks/main.yml

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+---
+- name: Set common facts
+  ansible.builtin.import_tasks: tasks/set-default-facts.yml
+
+- name: Deploy {{ role_name }}
+  vars:
+    svc: "{{ loki_svc }}"
+    yml: "{{ loki_yml }}"
+    compose: "{{ loki_compose }}"
+  block:
+    - name: Import prepare tasks for common service
+      ansible.builtin.import_tasks: tasks/prepare-common-service.yml
+
+    - name: Template loki config file
+      ansible.builtin.template:
+        src: yml.j2
+        dest: "{{ (service_path, 'loki.yaml') | path_join }}"
+        mode: "0644"
+      notify: Restart service {{ role_name }}
+
+    - name: Import start tasks for common service
+      ansible.builtin.import_tasks: tasks/start-common-service.yml

playbooks/roles/loki/vars/main.yml

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+---
+loki_svc:
+  domain: "{{ all_services | service_get_domain(role_name) }}"
+  port: 3100
+  caddy_extra: import vpn_only
+
+loki_yml: # https://grafana.com/docs/loki/latest/configure/examples/configuration-examples/#2-s3-cluster-exampleyaml
+  auth_enabled: false
+
+  common:
+    storage:
+      s3:
+        s3forcepathstyle: true
+        bucketnames: "{{ opentofu.minio_data.loki.name }}"
+        endpoint: "{{ opentofu.minio_data.loki.api_endpoint }}"
+        region: "{{ opentofu.minio_data.loki.region }}"
+        access_key_id: "{{ opentofu.minio_data.loki.access_key }}"
+        secret_access_key: "{{ opentofu.minio_data.loki.secret_key }}"
+    ring:
+      instance_addr: 127.0.0.1
+      kvstore:
+        store: inmemory
+    replication_factor: 1
+    path_prefix: /loki
+
+  ui:
+    enabled: true
+
+  storage_config:
+    tsdb_shipper:
+      active_index_directory: /loki/index
+      cache_location: /loki/index_cache
+
+  schema_config:
+    configs:
+      - from: "2020-05-15"
+        store: tsdb
+        object_store: s3
+        schema: v13
+        index:
+          prefix: index_
+          period: 24h
+
+  compactor:
+    working_directory: /loki/compactor
+
+
+loki_compose:
+  watchtower: update
+  image: grafana/loki:latest
+  volumes:
+    - ./loki.yaml:/etc/loki-config/loki.yaml:ro
+  file:
+    services:
+      app:
+        command:
+          - -config.file=/etc/loki-config/loki.yaml
+    volumes:
+      data: