Ingress access logging content is missing due to the maximum length 1024 bytes in OpenShift Container Platform 4

Issue

• Ingress access logging content is missing due to the default HAProxy maximum length 1024 bytes in OpenShift Container Platform 4 when using
  Configuring Ingress access logging with the httpLogFormat option to output the self-specific json format.

If the access logging content length is more than the default HAProxy maximum length 1024 bytes, it will be an incomplete json log and cannot be read by the backend log system.

Here is a sample for configuring the ingress access logging as the json format(if the customized json format is too long that will be over 1024 bytes):

# oc edit ingresscontroller -n openshift-ingress-operator

spec:
  logging:
    access:
      destination:
        syslog:
          address: 192.168.14.10
          port: 514
        type: Syslog
      httpLogFormat: '{"type":"router-log","log_format":"http","nodename":"%H","timestamp":"%[date,ltime(%Y/%m/%d %T)]","http_method":"%HM","url":"http://%[capture.req.hdr(0)]%HU","user-agent":"%[capture.req.hdr(1)]","x-forwarded-for":"%ci","x-forwarded-proto":"%[capture.req.hdr(3)]","response_time":%Tr,"status_code":%ST,"client_ip":"%ci","client_port":%cp,"bytes_uploaded":%U,"server_ip":"%si","server_port":"%sp","backend_name":"%b","backend_server":"%s","retries":%rc,"bytes_read":%B,"upstream_connect_time":%Tc,"session_duration":%Tt,"termination_state":"%ts"}'

Use wc -c to print access logging byte counts for the self-specific json format.

# echo '{"type":"router-log","log_format":"http","nodename":"worker-2.ocp4.example.com","timestamp":"2021/07/27 13:58:28","http_method":"GET","url":"http://-/","user-agent":"-","x-forwarded-for":"192.168.14.10","x-forwarded-proto":"-","response_time":5,"status_code":200,"client_ip":"192.168.14.10","client_port":36182,"bytes_uploaded":93,"server_ip":"10.131.0.34","server_port":"8080","backend_name":"be_http:httpecho:example","backend_server":"pod:http-https-echo-79664f4f97-jgp8w:http-https-echo:8080-tcp:10.131.0.34:8080","retries":0,"bytes_read":975,"upstream_connect_time":1,"session_duration":6,"termination_state":"--"}' | wc -c

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