coredns/middleware/erratic

erratic

erratic is a middleware useful for testing client behavior. It returns a static response to all queries, but the responses can be delayed by a random amount of time or dropped all together, i.e. no answer at all.

._<transport>.qname. 0 IN SRV 0 0 <port> .

The erratic middleware will respond to every A or AAAA query. For any other type it will return a SERVFAIL response. The reply for A will return 192.0.2.53 (see RFC 5737), for AAAA it returns 2001:DB8::53 (see RFC 3849).

Syntax

erratic {
    drop AMOUNT
}

• AMOUNT drop 1 per AMOUNT of the queries, the default is 2.

Examples

.:53 {
    erratic {
        drop 3
    }
}

Or even shorter if the defaults suits you:

. {
    erratic
}

Bugs

Delaying answers is not implemented.