mirror of
https://github.com/coredns/coredns.git
synced 2025-11-19 18:32:16 -05:00
953cfc1de4
* Removed lumberjack from coremain As is mentioned in 251, this fix removed lumberjack from coremain. Signed-off-by: Yong Tang <yong.tang.github@outlook.com> * Remove lumberjack from log middleware As mentioned in 251, lumberjack is not suitable for applications like CoreDNS so it is removed from the log middleware. Signed-off-by: Yong Tang <yong.tang.github@outlook.com> * Update log/README.md as lumberjack has been removed Signed-off-by: Yong Tang <yong.tang.github@outlook.com> * Adjust default log output from `ioutil.Discard` to `os.Stdout` Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
70 lines
1.6 KiB
Markdown
70 lines
1.6 KiB
Markdown
# log
|
|
|
|
`log` enables request logging. The request log is also known in some vernacular as an access log.
|
|
|
|
## Syntax
|
|
|
|
~~~
|
|
log
|
|
~~~
|
|
|
|
* With no arguments, a query log entry is written to query.log in the common log format for all requests
|
|
(base name = .).
|
|
|
|
~~~
|
|
log file
|
|
~~~
|
|
|
|
* file is the log file to create (or append to). The base path is assumed to be . .
|
|
|
|
~~~
|
|
log name file [format]
|
|
~~~
|
|
|
|
* `name` is the base name to match in order to be logged
|
|
* `file` is the log file to create (or append to)
|
|
* `format` is the log format to use (default is Common Log Format)
|
|
|
|
## Log File
|
|
|
|
The log file can be any filename. It could also be stdout or stderr to write the log to the console,
|
|
or syslog to write to the system log (except on Windows). If the log file does not exist beforehand,
|
|
CoreDNS will create it before appending to it.
|
|
|
|
## Log Format
|
|
|
|
You can specify a custom log format with any placeholder values. Log supports both request and
|
|
response placeholders.
|
|
|
|
The following place holders are supported:
|
|
|
|
* `{type}`: qtype of the request.
|
|
* `{name}`: qname of the request.
|
|
* `{class}`: qclass of the request.
|
|
* `{proto}`: protocol used (tcp or udp).
|
|
* `{when}`: time of the query.
|
|
* `{remote}`: client's IP address.
|
|
* `{port}`: client's port.
|
|
* `{rcode}`: response RCODE.
|
|
* `{size}`: response size.
|
|
* `{duration}`: response duration.
|
|
* `{>bufsize}`: the EDNS0 buffer size advertized by the client.
|
|
* `{>do}`: is the EDNS0 DO (DNSSEC OK) bit set.
|
|
* `{>id}`: query ID
|
|
* `{>opcode}`: query OPCODE
|
|
|
|
|
|
## Examples
|
|
|
|
Log all requests to a file:
|
|
|
|
~~~
|
|
log /var/log/query.log
|
|
~~~
|
|
|
|
Custom log format:
|
|
|
|
~~~
|
|
log . ../query.log "{proto} Request: {name} {type} {>id}"
|
|
~~~
|