Adds FluentD configuration for OpenvSwitch log matching

Adds a new configuration file that provides fluentd with an appropiate regex to match with OpenvSwitch logs in both default files.

The regex is segmented with variable as to isolate the relevant parts of each log message.

Closes-Bug: #1965815
Signed-off-by: Juan Pablo Suazo <jsuazo@whitestack.com>
Change-Id: Ife83c50c048d517a5c8a5dee588f8f7846fcee00

ansible/roles/common/tasks/config.yml

@@ -104,6 +104,8 @@
         enabled: "{{ enable_prometheus_fluentd_integration | bool }}"
       - name: "conf/input/09-monasca.conf.j2"
         enabled: true
+      - name: "conf/input/10-openvswitch.conf.j2"
+        enabled: true
     customised_input_files: "{{ find_custom_fluentd_inputs.files | map(attribute='path') | list }}"
     # Filters
     fluentd_filter_files: "{{ default_filter_files | customise_fluentd(customised_filter_files) }}"

ansible/roles/common/templates/conf/input/10-openvswitch.conf.j2

@@ -0,0 +1,25 @@
+<source>
+  @type tail
+  path /var/log/kolla/openvswitch/ovs-vswitchd.log
+  pos_file /var/run/td-agent/openvswitch.pos
+  tag infra.openvswitch
+  format multiline
+  format_firstline /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}/
+  format1 /^(?<Timestamp>\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3})Z\|\d{5,}\|(?<module>\S+)\|(?<log_level>\S+)\|(?<Payload>.*)/
+  time_key Timestamp
+  time_format %FT%T.%L
+  enable_watch_timer false
+</source>
+
+<source>
+  @type tail
+  path /var/log/kolla/openvswitch/ovsdb-server.log
+  pos_file /var/run/td-agent/openvswitchdb.pos
+  tag infra.openvswitchdb
+  format multiline
+  format_firstline /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}/
+  format1 /^(?<Timestamp>\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3})Z\|\d{5,}\|(?<module>\S+)\|(?<log_level>\S+)\|(?<Payload>.*)/
+  time_key Timestamp
+  time_format %FT%T.%L
+  enable_watch_timer false
+</source>

releasenotes/notes/bug-1965815-37fc4f82bef7a47e.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Adds Fluentd configurations to allow matching OpenvSwitch logs.
+    `LP#1965815 <https://launchpad.net/bugs/1965815>`__