Nginx access.log have to be formatted with this format:

log_format main_ext
    '$remote_addr $http_host $remote_user [$time_local] "$request" '
    '$status $body_bytes_sent "$http_referer" '
    '"$http_user_agent" "$http_x_forwarded_for" '
    'rt=$request_time ua="$upstream_addr" '
    'us="$upstream_status" ut="$upstream_response_time" '
    'ul="$upstream_response_length" '
    'cs=$upstream_cache_status';

Install with pip:

pip install nginx2es

• Stable log record ID (hostname + file inode number + timestamp + file position). It makes possible to import log file more than once (adding some additional processing to nginx2es, or dropping a daily index containing only a half of records, etc) without creating a duplicate records.
• Parse query params and split request uri path components to separate fields for complex log filtering / aggregations.
• Optional use of the GeoIP database (requires the geoip module and the GeoIPCity.dat database file) - adds city and region_name fields.
• Correctly parse log records containing information about multiple upstream responses.
• The tail -F-like mode implemented with inotify.