Date: Wed, 15 Mar 2017 11:11:03 -0400 From: Rich Felker <dalias@...c.org> To: musl@...ts.openwall.com Subject: Re: Queries with less than `ndots` dots never lead to resolution using the global namespace if the `search` domains don't work On Wed, Mar 15, 2017 at 12:58:02PM +0000, dominic.chambers@...ncore.com wrote: > HI Rich, > > Thanks for the prompt response here. Apologies for any confusion I > may have created, but I think the server is responding with an > overall `NXDOMAIN` response. This is what I get from running `dig > google.com.default.svc.cluster.local`: > > ``` > ; <<>> DiG 9.10.3-P4-Ubuntu <<>> google.com.default.svc.cluster.local > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 20863 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 > > ;; QUESTION SECTION: > ;google.com.default.svc.cluster.local. IN A > > ;; AUTHORITY SECTION: > cluster.local. 60 IN SOA ns.dns.cluster.local. hostmaster > .cluster.local. 1489579200 28800 7200 604800 60 > > ;; Query time: 0 msec > ;; SERVER: 10.43.0.10#53(10.43.0.10) > ;; WHEN: Wed Mar 15 12:49:14 UTC 2017 > ;; MSG SIZE rcvd: 147 > ``` > > Although there's less information with nslookup, the response from > running `nslookup google.com.default.svc.cluster.local` seems even > more definitive: > > ``` > Server: 10.43.0.10 > Address: 10.43.0.10#53 > > ** server can't find google.com.default.svc.cluster.local: NXDOMAIN > ``` > > Maybe I was just reading too much into the output from dig regarding > exactly what was being returned from the server. Any further > thoughts? Can you send an strace log of an affected lookup with musl's resolver (rather than dig/nslookup which use bind's resolver) for me to look at? Attached is source for a trivial sample utility to perform a lookup. Rich View attachment "gai3a.c" of type "text/plain" (786 bytes)
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