Improved Log Format
log_format main_cf '$remote_addr\t$http_cf_connecting_ip\t$server_addr\t$hostname\t'
'$time_iso8601\t$host\t$request_uri\t$request_length\t'
'$request_time\t$status\t$body_bytes_sent\t$http_user_agent\t'
'$upstream_addr\t$upstream_status\t$upstream_connect_time\t$upstream_response_time\t'
'$request_method\t$server_protocol\t$http_cf_ipcountry\t$http_cf_ray\t';Note: If a server cannot be selected, $upstream_status keeps the 502.
Position of common variables in main_cf format:
| Variable | Position |
|---|---|
$status | 10 |
$request_uri | 7 |
$request_time | 9 |
$http_user_agent | 12 |
Basic Information
$bytes_sent
number of bytes sent to a client (1.3.8, 1.2.5). Measured at HTTP-level, not including TCP or TLS overhead.
$body_bytes_sent
number of bytes sent to a client, not counting the response header; this variable is compatible with the “%B” parameter of the mod_log_config Apache module
$host
in this order of precedence: host name from the request line, or host name from the “Host” request header field, or the server name matching a request. Read from headers_in.server instead of headers_in.host. The former is normalized with ngx_http_validate_host().
$hostname
host name
$remote_addr
client address
$server_addr
an address of the server which accepted a request
Computing a value of this variable usually requires one system call. To avoid a system call, the listen directives must specify addresses and use the bind parameter.
$request_length
request length (including request line, header, and request body) (1.3.12, 1.2.7)
$request_method
request method, usually “GET” or “POST”
$request_time
request processing time in seconds with a milliseconds resolution (1.3.9, 1.2.6); time elapsed since the first bytes were read from the client
$request_uri
full original request URI (with arguments)
$scheme
request scheme, “http” or “https”
$server_protocol
request protocol, usually “HTTP/1.0”, “HTTP/1.1”, “HTTP/2.0”, or “HTTP/3.0”
$status
response status (1.3.2, 1.2.2)
$time_iso8601, $time_local
local time in the ISO 8601 standard format (1.3.12, 1.2.7) and the Common Log Format (1.3.12, 1.2.7). Records the time (cached) when the log entry is written.
$http_name
arbitrary request header field; the last part of a variable name is the field name converted to lower case with dashes replaced by underscores
HTTP/2
$connection
connection serial number (1.3.8, 1.2.5)
$connection_requests
current number of requests made through a connection (1.3.8, 1.2.5)
$connection_time
connection time in seconds with a milliseconds resolution (1.19.10)
TCP Information
$tcpinfo_rtt, $tcpinfo_rttvar, $tcpinfo_snd_cwnd, $tcpinfo_rcv_space
information about the client TCP connection; available on systems that support the TCP_INFO socket option