mirror of
https://github.com/coredns/coredns.git
synced 2025-10-27 16:24:19 -04:00
133 lines
2.0 KiB
Groff
133 lines
2.0 KiB
Groff
.\" Generated by Mmark Markdown Processer - mmark.miek.nl
|
|
.TH "COREDNS-ERRATIC" 7 "August 2020" "CoreDNS" "CoreDNS Plugins"
|
|
|
|
.SH "NAME"
|
|
.PP
|
|
\fIerratic\fP - a plugin useful for testing client behavior.
|
|
|
|
.SH "DESCRIPTION"
|
|
.PP
|
|
\fIerratic\fP returns a static response to all queries, but the responses can be delayed,
|
|
dropped or truncated. The \fIerratic\fP plugin will respond to every A or AAAA query. For
|
|
any other type it will return a SERVFAIL response (except AXFR). The reply for A will return
|
|
192.0.2.53 (RFC 5737
|
|
\[la]https://tools.ietf.org/html/rfc5737\[ra]), for AAAA it returns 2001:DB8::53 (RFC
|
|
3849
|
|
\[la]https://tools.ietf.org/html/rfc3849\[ra]). For an AXFR request it will respond with a small
|
|
zone transfer.
|
|
|
|
.SH "SYNTAX"
|
|
.PP
|
|
.RS
|
|
|
|
.nf
|
|
erratic {
|
|
drop [AMOUNT]
|
|
truncate [AMOUNT]
|
|
delay [AMOUNT [DURATION]]
|
|
}
|
|
|
|
.fi
|
|
.RE
|
|
|
|
.IP \(bu 4
|
|
\fB\fCdrop\fR: drop 1 per \fBAMOUNT\fP of queries, the default is 2.
|
|
.IP \(bu 4
|
|
\fB\fCtruncate\fR: truncate 1 per \fBAMOUNT\fP of queries, the default is 2.
|
|
.IP \(bu 4
|
|
\fB\fCdelay\fR: delay 1 per \fBAMOUNT\fP of queries for \fBDURATION\fP, the default for \fBAMOUNT\fP is 2 and
|
|
the default for \fBDURATION\fP is 100ms.
|
|
|
|
|
|
.PP
|
|
In case of a zone transfer and truncate the final SOA record \fIisn't\fP added to the response.
|
|
|
|
.SH "READY"
|
|
.PP
|
|
This plugin reports readiness to the ready plugin.
|
|
|
|
.SH "EXAMPLES"
|
|
.PP
|
|
.RS
|
|
|
|
.nf
|
|
example.org {
|
|
erratic {
|
|
drop 3
|
|
}
|
|
}
|
|
|
|
.fi
|
|
.RE
|
|
|
|
.PP
|
|
Or even shorter if the defaults suit you. Note this only drops queries, it does not delay them.
|
|
|
|
.PP
|
|
.RS
|
|
|
|
.nf
|
|
example.org {
|
|
erratic
|
|
}
|
|
|
|
.fi
|
|
.RE
|
|
|
|
.PP
|
|
Delay 1 in 3 queries for 50ms
|
|
|
|
.PP
|
|
.RS
|
|
|
|
.nf
|
|
example.org {
|
|
erratic {
|
|
delay 3 50ms
|
|
}
|
|
}
|
|
|
|
.fi
|
|
.RE
|
|
|
|
.PP
|
|
Delay 1 in 3 and truncate 1 in 5.
|
|
|
|
.PP
|
|
.RS
|
|
|
|
.nf
|
|
example.org {
|
|
erratic {
|
|
delay 3 5ms
|
|
truncate 5
|
|
}
|
|
}
|
|
|
|
.fi
|
|
.RE
|
|
|
|
.PP
|
|
Drop every second query.
|
|
|
|
.PP
|
|
.RS
|
|
|
|
.nf
|
|
example.org {
|
|
erratic {
|
|
drop 2
|
|
truncate 2
|
|
}
|
|
}
|
|
|
|
.fi
|
|
.RE
|
|
|
|
.SH "ALSO SEE"
|
|
.PP
|
|
RFC 3849
|
|
\[la]https://tools.ietf.org/html/rfc3849\[ra] and RFC 5737
|
|
\[la]https://tools.ietf.org/html/rfc5737\[ra].
|
|
|