fastly json log format

format.json

{
	"service_id":"%{req.service_id}V",
	"service_version":"%{fastly_info.version}V",
	"time_start":%{begin:msec}t,
	"time_end":%{end:msec}t,
	"time_elapsed":%{time.elapsed.usec}V,
	"client_ip":"%{req.http.Fastly-Client-IP}V",
	"request":"%{req.request}V",
	"protocol":"%{req.proto}V",
	"host":"%{req.http.Fastly-Orig-Host}V",
	"origin_host":"%{req.http.Host}V",
	"url":"%{cstr_escape(req.url)}V",
	"is_ipv6":%{if(req.is_ipv6,"true","false")}V,
	"is_tls":%{if(req.is_ssl,"true","false")}V,
	"tls_client_protocol":"%{cstr_escape(tls.client.protocol)}V",
	"tls_client_servername":"%{cstr_escape(tls.client.servername)}V",
	"tls_client_cipher":"%{cstr_escape(tls.client.cipher)}V",
	"tls_client_cipher_sha":"%{cstr_escape(tls.client.ciphers_sha )}V",
	"tls_client_tlsexts_sha":"%{cstr_escape(tls.client.tlsexts_sha)}V",
	"is_h2":%{if(fastly_info.is_h2,"true","false")}V,
	"is_h2_push":%{if(fastly_info.h2.is_push,"true","false")}V,
	"h2_stream_id":"%{fastly_info.h2.stream_id}V",
	"request_referer":"%{cstr_escape(req.http.Referer)}V",
	"request_user_agent":"%{cstr_escape(req.http.User-Agent)}V",
	"request_accept_content":"%{cstr_escape(req.http.Accept)}V",
	"request_accept_language":"%{cstr_escape(req.http.Accept-Language)}V",
	"request_accept_encoding":"%{cstr_escape(req.http.Accept-Encoding)}V",
	"request_accept_charset":"%{cstr_escape(req.http.Accept-Charset)}V",
	"request_connection":"%{cstr_escape(req.http.Connection)}V",
	"request_dnt":"%{cstr_escape(req.http.DNT)}V",
	"request_forwarded":"%{cstr_escape(req.http.Forwarded)}V",
	"request_via":"%{cstr_escape(req.http.Via)}V",
	"request_cache_control":"%{cstr_escape(req.http.Cache-Control)}V",
	"request_x_requested_with":"%{cstr_escape(req.http.X-Requested-With)}V",
	"request_x_forwarded_for":"%{cstr_escape(req.http.X-Forwarded-For)}V",
	"status":"%{resp.status}V",
	"content_type":"%{cstr_escape(resp.http.Content-Type)}V",
	"cache_status":"%{regsub(fastly_info.state,"^(HIT-(SYNTH)|(HITPASS|HIT|MISS|PASS|ERROR|PIPE)).*","\\2\\3")}V",
	"is_cacheable":%{if(fastly_info.state ~"^(HIT|MISS)$","true","false")}V,
	"response_age":"%{cstr_escape(resp.http.Age)}V",
	"response_cache_control":"%{cstr_escape(resp.http.Cache-Control)}V",
	"response_expires":"%{cstr_escape(resp.http.Expires)}V",
	"response_last_modified":"%{cstr_escape(resp.http.Last-Modified)}V",
	"response_tsv":"%{cstr_escape(resp.http.TSV)}V",
	"geo_datacenter":"%{server.datacenter}V",
	"geo_city":"%{geoip.city}V",
	"geo_country_code":"%{geoip.country_code}V",
	"geo_continent_code":"%{geoip.continent_code}V",
	"geo_region":"%{geoip.region}V",
	"req_header_size":%{req.header_bytes_read}V,
	"req_body_size":%{req.body_bytes_read}V,
	"resp_header_size":%{resp.header_bytes_written}V,
	"resp_body_size":%{resp.body_bytes_written}V,
	"socket_cwnd":%{client.socket.cwnd}V,
	"socket_nexthop":"%{client.socket.nexthop}V",
	"socket_tcpi_rcv_mss":%{client.socket.tcpi_rcv_mss}V,
	"socket_tcpi_snd_mss":%{client.socket.tcpi_snd_mss}V,
	"socket_tcpi_rtt":%{client.socket.tcpi_rtt}V,
	"socket_tcpi_rttvar":%{client.socket.tcpi_rttvar}V,
	"socket_tcpi_rcv_rtt":%{client.socket.tcpi_rcv_rtt}V,
	"socket_tcpi_rcv_space":%{client.socket.tcpi_rcv_space}V,
	"socket_tcpi_last_data_sent":%{client.socket.tcpi_last_data_sent}V,
	"socket_tcpi_total_retrans":%{client.socket.tcpi_total_retrans}V,
	"socket_tcpi_delta_retrans":%{client.socket.tcpi_delta_retrans}V,
	"socket_ploss":%{client.socket.ploss}V
}