JQ

Easy parse from JSON to output

Brief

• Written on Python
• Don't faster

Tips

• Show only HTTP_CODE 500 and print as tab table

tail -f /var/log/nginx/access.log | \
  jq -r '[.time_local,.remote_addr,(.status | select(contains("500"))),.request_time,.upstream_response_time,.request] | @tsv'

• Show request contains a pattern

tail -f /var/log/nginx/access.log | \
  jq -r 'select(.request | contains("feedback/attach")) | [.time_local,.client_addr,.status,.request_time,.upstream_response_time,.request] | @tsv'

• Apply two sequence filters and setup limit to the request field just 80 symbols

tail -f /var/log/nginx/access.log | \
  jq -r 'select(.status != "200") | select(.request | contains("/api/health")) | [.time_local,.remote_addr,.status,.request_time,.upstream_response_time,.request[0:80]] | @tsv'