From c599fccc2b99a58c2db6355892bc24dc9bb6f402 Mon Sep 17 00:00:00 2001
From: Kazuhiro MUSASHI <simoom634@yahoo.co.jp>
Date: Mon, 7 Sep 2020 23:15:53 +0900
Subject: [PATCH 1/3] Deploy `promtail` config & `systemd` config.

---
 cookbooks/nginx/setup.rb | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/cookbooks/nginx/setup.rb b/cookbooks/nginx/setup.rb
index 2b4d8f9..bbe449a 100644
--- a/cookbooks/nginx/setup.rb
+++ b/cookbooks/nginx/setup.rb
@@ -68,3 +68,26 @@ end
 service 'nginx' do
   action [ :enable, :start ]
 end
+
+# Deploy `promtail` config file:
+HOSTNAME = run_command('uname -n').stdout.chomp
+
+template '/etc/promtail/nginx.yaml' do
+  owner 'root'
+  group 'root'
+  mode '644'
+
+  variables(HOSTNAME: HOSTNAME, LOKIENDPOINT: node['promtail']['lokiendpoint'])
+end
+
+# Deploy the `systemd` configuration:
+remote_file '/lib/systemd/system/promtail-nginx.service' do
+  owner 'root'
+  group 'root'
+  mode '644'
+end
+
+# Service setting:
+service 'promtail-nginx' do
+  action [ :enable, :restart ]
+end

From 110f8ae8bcac6a37550c1af1a7d27c1261370bbc Mon Sep 17 00:00:00 2001
From: Kazuhiro MUSASHI <simoom634@yahoo.co.jp>
Date: Mon, 7 Sep 2020 23:17:33 +0900
Subject: [PATCH 2/3] `systemd` config for `prmtail` nginx.

---
 .../files/lib/systemd/system/promtail-nginx.service  | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 cookbooks/nginx/files/lib/systemd/system/promtail-nginx.service

diff --git a/cookbooks/nginx/files/lib/systemd/system/promtail-nginx.service b/cookbooks/nginx/files/lib/systemd/system/promtail-nginx.service
new file mode 100644
index 0000000..dc8c2b6
--- /dev/null
+++ b/cookbooks/nginx/files/lib/systemd/system/promtail-nginx.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=Grafana Promtail (nginx)
+Documentation=https://github.com/grafana/loki
+After=network-online.target
+
+[Service]
+User=root
+Restart=always
+ExecStart=/usr/local/bin/promtail --config.file=/etc/promtail/nginx.yaml
+
+[Install]
+WantedBy=multi-user.target

From f621f97e7508d6beafe3300512199598ce4b114a Mon Sep 17 00:00:00 2001
From: Kazuhiro MUSASHI <simoom634@yahoo.co.jp>
Date: Mon, 7 Sep 2020 23:23:55 +0900
Subject: [PATCH 3/3] `promtail` config for `nginx`.

---
 .../nginx/templates/etc/promtail/nginx.yaml   | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 cookbooks/nginx/templates/etc/promtail/nginx.yaml

diff --git a/cookbooks/nginx/templates/etc/promtail/nginx.yaml b/cookbooks/nginx/templates/etc/promtail/nginx.yaml
new file mode 100644
index 0000000..5e14af3
--- /dev/null
+++ b/cookbooks/nginx/templates/etc/promtail/nginx.yaml
@@ -0,0 +1,79 @@
+server:
+  disable: true
+
+positions:
+  filename: /var/opt/promtail/promtail_nginx_position.yaml
+
+clients:
+  - url: http://<%= @LOKIENDPOINT %>/loki/api/v1/push
+
+
+scrape_configs:
+  - job_name: nginx-access
+    static_configs:
+    - targets:
+        - localhost
+      labels:
+        job: nginx
+        hostname: <%= @HOSTNAME %>
+        __path__: /var/log/nginx/*access.log
+
+    pipeline_stages:
+    - match:
+        selector: '{job="nginx"}'
+        stages:
+        - regex:
+            expression: "^time:(?P<timestamp>[^\t]+)\thost:(?P<host>[^\t]+)\tforwardedfor:(?P<forwardedfor>[^\t]+)\tmethod:(?P<method>[^\t]+)\tpath:(?P<path>[^\t]+)\tprotocol:(?P<protocol>[^\t]+)\tstatus:(?P<status>[^\t]+)\tsize:(?P<size>[^\t]+)\treferer:(?P<referer>[^\t]+)\tua:(?P<ua>[^\t]+)\ttaken_sec:(?P<taken_sec>[^\t]+)\tbackend:(?P<backend>[^\t]+)\tbackend_status:(?P<backend_status>[^\t]+)\tcache:(?P<cache>[^\t]+)\tbackend_runtime:(?P<backend_runtime>[^\t]+)\tvhost:(?P<vhost>[^\t]+)$"
+
+        - timestamp:
+            source: timestamp
+            format: 02/Jan/2006:15:04:05 -0700
+
+        - template:
+            source: level
+            template: '{{ .status }}'
+
+        - template:
+            source: level
+            template: '{{ regexReplaceAllLiteral "(2|3)[0-9]+" .Value "info" }}'
+
+        - template:
+            source: level
+            template: '{{ regexReplaceAllLiteral "4[0-9]+" .Value "warning" }}'
+
+        - template:
+            source: level
+            template: '{{ regexReplaceAllLiteral "5[0-9]+" .Value "error" }}'
+
+        - labels:
+            hostname:
+            level:
+            vhost:
+
+  - job_name: nginx-error
+    static_configs:
+    - targets:
+        - localhost
+      labels:
+        job: nginx
+        hostname: <%= @HOSTNAME %>
+        level: error
+        __path__: /var/log/nginx/*error.log
+
+    pipeline_stages:
+    - match:
+        selector: '{job="nginx"}'
+        stages:
+        - regex:
+            expression: '^(?P<timestamp>[0-9\/]+ [0-9:]+) \[(?P<level>[^ ]+)\] (?P<message>.+), host: "(?P<vhost>[^"]+)"(?P<rest>.*)$'
+
+        - timestamp:
+            source: timestamp
+            format: 2006/01/02 15:04:05
+            location: Asia/Tokyo
+
+        - labels:
+            vhost:
+
+        - output:
+            source: message