Issue:
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One of my customers redirect Istio Envoy access logs to a file, for this purpose they changed accessLogFile: "/etc/istio/proxy/envoy.log" this is working fine, now their concern is regarding the growing size of this file.

The customer tried to add rotation parameters in istio-sidecar-injector ConfigMap, but envoy.log file size continues to grow anyway:

• '--log_target /etc/istio/proxy/envoy.log'
• '--log_rotate /etc/istio/proxy/envoy.log'
• '--log_rotate_max_size 2'
• '--log_rotate_max_age 0'
• '--log_rotate_max_backups 0'

Need to know why the parameter '--log_rotate_max_size 2' (2 MB) is not considered? The customer has shown the screenshot in which the file has grown upto 3.3M

I checked the ConfigMap yaml configuration and the syntax for the above parameters is correct. The configuration has been picked up by the Deployment properly.

Version:
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OpenShift 4.3.5
OpenShift ServiceMesh 1.0.7

Additional info:
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I have Checked below Istio documentation and the parameters that are used as correct.

https://istio.io/docs/ops/diagnostic-tools/component-logging/#log-rotation

https://istio.io/pt-br/docs/reference/commands/sidecar-injector/