[docker-base]: Rate limit priority INFO and lower in syslog (sonic-ne…

…t#5666)

There is currently a bug where messages from swss with priority lower than the current log level are still being counted against the syslog rate limiting threshhold. This leads to rate-limiting in syslog when the rate-limiting conditions have not been met, which causes several sonic-mgmt tests to fail since they are dependent on LogAnalyzer. It also omits potentially useful information from the syslog. Only rate-limiting messages of level INFO and lower allows these tests to pass successfully.

Signed-off-by: Lawrence Lee <lawlee@microsoft.com>

dockers/docker-base-buster/etc/rsyslog.conf

@@ -12,10 +12,11 @@
 $ModLoad imuxsock # provides support for local system logging
 
 #
-# Set a rate limit on messages from the container
+# Set a rate limit on messages from the container of priority INFO or lower (level 6 and above)
 #
 $SystemLogRateLimitInterval 300
 $SystemLogRateLimitBurst 20000
+$SystemLogRateLimitSeverity 6
 
 #$ModLoad imklog # provides kernel logging support
 #$ModLoad immark # provides --MARK-- message capability

dockers/docker-base-stretch/etc/rsyslog.conf

@@ -12,10 +12,11 @@
 $ModLoad imuxsock # provides support for local system logging
 
 #
-# Set a rate limit on messages from the container
+# Set a rate limit on messages from the container of priority INFO or lower (level 6 and above)
 #
 $SystemLogRateLimitInterval 300
 $SystemLogRateLimitBurst 20000
+$SystemLogRateLimitSeverity 6
 
 #$ModLoad imklog # provides kernel logging support
 #$ModLoad immark # provides --MARK-- message capability

dockers/docker-base/etc/rsyslog.conf

@@ -16,10 +16,11 @@
 $ModLoad imuxsock # provides support for local system logging
 
 #
-# Set a rate limit on messages from the container
+# Set a rate limit on messages from the container of priority INFO or lower (level 6 and above)
 #
 $SystemLogRateLimitInterval 300
 $SystemLogRateLimitBurst 20000
+$SystemLogRateLimitSeverity 6
 
 #$ModLoad imklog # provides kernel logging support
 #$ModLoad immark # provides --MARK-- message capability

files/image_config/rsyslog/rsyslog-container.conf.j2

@@ -12,10 +12,11 @@
 $ModLoad imuxsock # provides support for local system logging
 
 #
-# Set a rate limit on messages from the container
+# Set a rate limit on messages from the container of priority INFO or lower (level 6 and above)
 #
 $SystemLogRateLimitInterval 300
 $SystemLogRateLimitBurst 20000
+$SystemLogRateLimitSeverity 6
 
 #$ModLoad imklog # provides kernel logging support
 #$ModLoad immark # provides --MARK-- message capability