loki: flesh out role

roles/loki/defaults/main.yaml

@@ -26,12 +26,17 @@ loki_user_shell: /usr/sbin/nologin
 loki_group: loki
 loki_group_state: "{{ loki_user_state | default('present') }}"
 
-loki_config_path: /etc/loki.yaml
-
 loki_var_path: /var/lib/loki
 loki_var_owner: "{{ loki_user }}"
 loki_var_group: "{{ loki_group }}"
-loki_var_mode: "0755"
+loki_var_mode: "0700"
+
+loki_etc_path: /etc/loki
+loki_etc_owner: "{{ loki_user }}"
+loki_etc_group: "{{ loki_group }}"
+loki_etc_mode: "0755"
+
+loki_config_path: "{{ loki_etc_path }}/config.yaml"
 
 loki_bin_path: /usr/local/bin
 
@@ -39,36 +44,51 @@ loki_auth_enabled: false
 
 loki_server:
   http_listen_port: 3100
+  grpc_listen_port: 9096
 
-loki_ingester:
-  lifecycler:
-    address: 127.0.0.1
-    ring:
-      kvstore:
-        store: inmemory
-      replication_factor: 1
-    final_sleep: 0s
-  chunk_idle_period: 5m
-  chunk_retain_period: 30s
+loki_common:
+  instance_addr: 127.0.0.1
+  path_prefix: "{{ loki_var_path }}"
+  storage:
+    filesystem:
+      chunks_directory: "{{ loki_var_path }}/chunks"
+      rules_directory: "{{ loki_var_path }}/rules"
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+loki_query_range:
+  results_cache:
+    cache:
+      embedded_cache:
+        enabled: true
+        max_size_mb: 100
+
+# loki_storage_config:
+#   {}
 
 loki_schema_config:
   configs:
-  - from: 2020-05-15
-    store: boltdb
-    object_store: filesystem
+  - from: 2020-10-24
+    store: boltdb-shipper
+    object_store: gcs
     schema: v11
     index:
       prefix: index_
-      period: 168h
+      period: 24h
 
-loki_storage_config:
-  boltdb:
-    directory: "{{ loki_var_path }}/index"
-  filesystem:
-    directory: "{{ loki_var_path }}/chunks"
+loki_ruler:
+  alertmanager_url: http://localhost:9093
+
+# loki_query_scheduler:
+#   {}
+
+# loki_querier:
+#   {}
+
+# loki_compactor:
+#   {}
 
 loki_limits_config:
-  enforce_metric_name: false
-  reject_old_samples: true
-  reject_old_samples_max_age: 168h
-  ingestion_burst_size_mb: 16
+  retention_period: 744h

roles/loki/tasks/configure.yaml

@@ -15,14 +15,13 @@
     home: "{{ loki_var_path }}"
     state: "{{ loki_user_state | default('present') }}"
 
-- name: configure
-  template:
-    src: loki.yaml.j2
-    dest: "{{ loki_config_path }}"
-    owner: root
-    group: root
-    mode: 0444
-  notify: restart loki
+- name: create etc path
+  file:
+    path: "{{ loki_etc_path }}"
+    state: directory
+    owner: "{{ loki_etc_owner }}"
+    group: "{{ loki_etc_group }}"
+    mode: "{{ loki_etc_mode }}"
 
 - name: create var path
   file:
@@ -32,6 +31,15 @@
     group: "{{ loki_var_group }}"
     mode: "{{ loki_var_mode }}"
 
+- name: configure
+  template:
+    src: config.yaml.j2
+    dest: "{{ loki_config_path }}"
+    owner: "{{ loki_user }}"
+    group: "{{ loki_group }}"
+    mode: 0400
+  notify: restart loki
+
 - name: configure systemd template
   template:
     src: "{{ loki_service_name }}.j2"

roles/loki/templates/config.yaml.j2

@@ -0,0 +1,55 @@
+{{ ansible_managed | comment }}
+---
+{% if loki_auth_enabled is defined %}
+auth_enabled: {{ loki_auth_enabled | bool | lower }}
+{% endif %}
+
+{% if loki_server is defined %}
+server:
+  {{ loki_server | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_common is defined %}
+common:
+  {{ loki_common | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_query_range is defined %}
+query_range:
+  {{ loki_query_range | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_storage_config is defined %}
+storage_config:
+  {{ loki_storage_config | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_schema_config is defined %}
+schema_config:
+  {{ loki_schema_config | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_ruler is defined %}
+ruler:
+  {{ loki_ruler | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_query_scheduler is defined %}
+query_scheduler:
+  {{ loki_query_scheduler | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_querier is defined %}
+querier:
+  {{ loki_querier | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_compactor is defined %}
+compactor:
+  {{ loki_compactor | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}
+
+{% if loki_limits_config is defined %}
+limits_config:
+  {{ loki_limits_config | to_nice_yaml(indent=2) | indent(2, False) }}
+{% endif -%}

roles/loki/templates/loki.service.j2

@@ -1,19 +1,19 @@
 {{ ansible_managed | comment }}
 
 [Unit]
-Description=Loki
-After=network-online.target
+Description=Loki service
+After=network.target
 
 [Service]
 Type=simple
 User={{ loki_user }}
-Group={{ loki_group }}
 ExecStart={{ loki_bin_path }}/loki \
   -config.file {{ loki_config_path }}
-WorkingDirectory={{ loki_var_path }}
 
-Restart=always
-RestartSec=1
+WorkingDirectory={{ loki_var_path }}
+TimeoutSec = 120
+Restart = on-failure
+RestartSec = 2
 
 [Install]
 WantedBy=multi-user.target

roles/loki/templates/loki.yaml.j2

@@ -1,30 +0,0 @@
-{{ ansible_managed | comment }}
----
-{% if loki_auth_enabled is defined %}
-auth_enabled: {{ loki_auth_enabled | bool | lower }}
-{% endif %}
-
-{% if loki_server is defined %}
-server:
-  {{ loki_server | to_nice_yaml(indent=2) | indent(2, False) }}
-{% endif -%}
-
-{% if loki_ingester is defined %}
-ingester:
-  {{ loki_ingester | to_nice_yaml(indent=2) | indent(2, False) }}
-{% endif -%}
-
-{% if loki_schema_config is defined %}
-schema_config:
-  {{ loki_schema_config | to_nice_yaml(indent=2) | indent(2, False) }}
-{% endif -%}
-
-{% if loki_storage_config is defined %}
-storage_config:
-  {{ loki_storage_config | to_nice_yaml(indent=2) | indent(2, False) }}
-{% endif -%}
-
-{% if loki_limits_config is defined %}
-limits_config:
-  {{ loki_limits_config | to_nice_yaml(indent=2) | indent(2, False) }}
-{% endif -%}