ansible playbooks for retailor.io infrastructure

roles/promtail/defaults/main.yml

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+---
+promtail_version: 3.4.2

roles/promtail/tasks/main.yml

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+---
+- name: Download the promtail archive
+  get_url:
+    url: "https://github.com/grafana/loki/releases/download/v{{ promtail_version }}/promtail-linux-amd64.zip"
+    dest: "/tmp/promtail.zip"
+
+- name: Extract promtail
+  unarchive:
+    src: "/tmp/promtail.zip"
+    dest: "/tmp"
+    remote_src: yes
+
+- name: Move promtail binary
+  copy:
+    src: "/tmp/promtail-linux-amd64"
+    dest: "/usr/local/bin/promtail"
+    remote_src: yes
+    mode: '0755'
+
+- name: Create promtail service
+  template:
+    src: "promtail.service.j2"
+    dest: "/etc/systemd/system/promtail.service"
+    mode: '0644'
+  tags:
+    - create_promtail_service
+
+- name: Reload systemd to pick up the promtail service
+  systemd:
+    daemon_reload: yes
+  tags:
+    - reload_systemd
+
+- name: Enable and start the promtail service
+  systemd:
+    name: promtail
+    state: started
+    enabled: yes
+  tags:
+    - start_promtail
+
+- name: Create promtail configuration file directory
+  file:
+    path: /etc/promtail
+    state: directory
+    mode: '0755'
+
+- name: Create promtail configuration file
+  template:
+    src: promtail.yml.j2
+    dest: /etc/promtail/config.yml
+
+

roles/promtail/templates/promtail.service.j2

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+[Unit] 
+Description=Promtail service 
+After=network.target 
+ 
+[Service] 
+Type=simple 
+User=root 
+ExecStart=/usr/local/bin/promtail -config.file /etc/promtail/config.yml --client.external-labels=hostname=%H
+Restart=on-failure 
+RestartSec=20 
+ 
+[Install] 
+WantedBy=multi-user.target

roles/promtail/templates/promtail.yml.j2

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+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+client:
+  url: http://prometheus-grafana:3100/loki/api/v1/push
+scrape_configs:
+  - job_name: nginx
+    static_configs:
+      - targets:
+          - localhost
+        labels:
+          job: nginx
+          __path__: /var/log/nginx/*.log
+
+    pipeline_stages:
+      - regex:
+          expression: '^(?P<remote_addr>\S+) - - \[(?P<timestamp>[^\]]+)\] "(?P<method>\S+) (?P<path>\S+) (?P<protocol>\S+)" (?P<status>\d+) (?P<bytes>\d+) "(?P<referrer>[^\"]*)" "(?P<user_agent>[^\"]*)"'
+      - timestamp:
+          source: "timestamp"
+          format: "02/Jan/2006:15:04:05 -0700"
+      - labels:
+          remote_addr:
+          method:
+          path:
+          protocol:
+          status:
+          referrer:
+          user_agent: