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62 lines
1.5 KiB
Groff
62 lines
1.5 KiB
Groff
.\" generated with Ronn/v0.7.3
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.\" http://github.com/rtomayko/ronn/tree/0.7.3
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.
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.TH "COREDNS\-DEBUG" "7" "October 2018" "CoreDNS" "CoreDNS plugins"
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.
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.SH "NAME"
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\fIdebug\fR \- disables the automatic recovery upon a crash so that you\'ll get a nice stack trace\.
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.
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.SH "DESCRIPTION"
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Normally CoreDNS will recover from panics, using \fIdebug\fR inhibits this\. The main use of \fIdebug\fR is to help testing\. A side effect of using \fIdebug\fR is that \fBlog\.Debug\fR and \fBlog\.Debugf\fR will be printed to standard output\.
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.
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.P
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Note that the \fIerrors\fR plugin (if loaded) will also set a \fBrecover\fR negating this setting\.
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.
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.SH "SYNTAX"
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.
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.nf
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debug
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.
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.fi
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.
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.P
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Some plugin will debug log DNS messages\. This is done in the following format:
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.
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.IP "" 4
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.
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.nf
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debug: 000000 00 0a 01 00 00 01 00 00 00 00 00 01 07 65 78 61
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debug: 000010 6d 70 6c 65 05 6c 6f 63 61 6c 00 00 01 00 01 00
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debug: 000020 00 29 10 00 00 00 80 00 00 00
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debug: 00002a
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.
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.fi
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.
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.IP "" 0
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.
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.P
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Using \fBtext2pcap\fR (part of Wireshark) this can be converted back to binary, with the following command line: \fBtext2pcap \-i 17 \-u 53,53\fR\. Where 17 is the protocol (UDP) and 53 are the ports\. These ports allow wireshark to detect these packets as DNS messages\.
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.
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.P
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Each plugin can decide to dump messages to aid in debugging\.
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.
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.SH "EXAMPLES"
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Disable the ability to recover from crashes and show debug logging:
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.
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.IP "" 4
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.
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.nf
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\&\. {
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debug
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}
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.
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.fi
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.
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.IP "" 0
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.
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.SH "ALSO SEE"
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https://www\.wireshark\.org/docs/man\-pages/text2pcap\.html\.
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