From 81822f12d3e7763711952a874a88eacdc9814f7d Mon Sep 17 00:00:00 2001
From: Kazuhiro MUSASHI <simoom634@yahoo.co.jp>
Date: Mon, 21 Sep 2020 00:19:52 +0900
Subject: [PATCH 1/2] Modify `promtail` config for `init` journal.

---
 .../promtail/templates/etc/promtail/base.yaml | 22 ++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/cookbooks/promtail/templates/etc/promtail/base.yaml b/cookbooks/promtail/templates/etc/promtail/base.yaml
index 3f73651..46df03b 100644
--- a/cookbooks/promtail/templates/etc/promtail/base.yaml
+++ b/cookbooks/promtail/templates/etc/promtail/base.yaml
@@ -208,9 +208,29 @@ scrape_configs:
       path: /var/log/journal
       labels:
         job: init
-        level: notice
         hostname: <%= @HOSTNAME %>
 
+    pipeline_stages:
+    - match:
+        selector: '{job="init"} |~ "(apt download|Message of the Day)"'
+        stages:
+        - template:
+            source: level
+            template: 'info'
+
+        - labels:
+            level:
+
+    - match:
+        selector: '{job="init"} !~ "(apt download|Message of the Day)"'
+        stages:
+        - template:
+            source: level
+            template: 'notice'
+
+        - labels:
+            level:
+
     relabel_configs:
       - action: keep
         regex: 'init\.scope'

From 0d3d8fe8006be0dffaf03a393d66db1934356d76 Mon Sep 17 00:00:00 2001
From: Kazuhiro MUSASHI <simoom634@yahoo.co.jp>
Date: Mon, 21 Sep 2020 00:20:34 +0900
Subject: [PATCH 2/2] Modify `promtail` config for `systemd`.

---
 .../promtail/templates/etc/promtail/base.yaml | 27 ++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/cookbooks/promtail/templates/etc/promtail/base.yaml b/cookbooks/promtail/templates/etc/promtail/base.yaml
index 46df03b..2470f8c 100644
--- a/cookbooks/promtail/templates/etc/promtail/base.yaml
+++ b/cookbooks/promtail/templates/etc/promtail/base.yaml
@@ -249,11 +249,36 @@ scrape_configs:
 
     pipeline_stages:
     - match:
-        selector: '{job="systemd"}'
+        selector: '{job="systemd"} !~ "temperature"'
         stages:
         - drop:
             expression: (CMD|UFW|session|TTY)
 
+    - match:
+        selector: '{job="systemd"} |~ "temperature"'
+
+        stages:
+        - regex:
+            expression: '^(?P<message>.+)$'
+
+        - template:
+            source: level
+            template: '{{ .message }}'
+
+        - template:
+            source: level
+            template: '{{ regexReplaceAllLiteral ".*normal.*" .Value "notice" }}'
+
+        - template:
+            source: level
+            template: '{{ regexReplaceAllLiteral ".*temperature.*" .Value "error" }}'
+
+        - labels:
+            level:
+
+        - output:
+            source: message
+
     relabel_configs:
       - source_labels: ['__journal__systemd_unit']
         target_label: 'unit'