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80 Commits

Author SHA1 Message Date
Matt Keeler 0fd7e97c2d Merge remote-tracking branch 'origin/master' into bugfix/prevent-multi-cname 2018-07-10 10:26:45 -04:00
Matt Keeler cbf8f14451 Ensure TXT RRs always end up in the Additional section except for ANY or TXT queries 
This also changes where the enforcement of the enable_additional_node_meta_txt configuration gets applied.

formatNodeRecord returns the main RRs and the meta/TXT RRs in separate slices. Its then up to the caller to add to the appropriate sections or not.
 2018-07-09 12:30:11 -04:00
Matt Keeler e3783a75e7 Refactor to make this much less confusing 2018-07-03 11:04:19 -04:00
Matt Keeler 554035974e Add a bunch of comments about preventing multi-cname 
Hopefully this a bit clearer as to the reasoning
 2018-07-03 10:32:52 -04:00
Matt Keeler 22c2be5bf1 Fix some edge cases and add some tests. 2018-07-02 16:58:52 -04:00
Matt Keeler 9a8500412b Only allow 1 CNAME when querying for a service. 
This just makes sure that if multiple services are registered with unique service addresses that we don’t blast back multiple CNAMEs for the same service DNS name and keeps us within the DNS specs.
 2018-07-02 16:12:06 -04:00
mkeeler 6813a99081 Merge remote-tracking branch 'connect/f-connect' 2018-06-25 19:42:51 +00:00
Kyle Havlovitz 050da22473 connect/ca: undo the interface changes and use sign-self-issued in Vault 2018-06-25 12:25:42 -07:00
Matt Keeler 8216816e3f Make filtering out TXT RRs only apply when they would end up in Additional section 
ANY queries are no longer affected.
 2018-06-19 10:08:16 -04:00
Mitchell Hashimoto 406366c45b
agent: working DNS for Connect queries, I think, but have to 
implement Health endpoints to be sure
 2018-06-14 09:41:47 -07:00
Matt Keeler 6cc0422408 Add configuration entry to control including TXT records for node meta in DNS responses 
If set to false, the only way to retrieve TXT records for node meta is to specifically query for TXT records.
 2018-06-11 11:49:04 -04:00
Matt Keeler 27fe219918
Merge pull request #4131 from pierresouchay/enable_full_dns_compression 
Enable full dns compression
 2018-06-01 10:42:03 -04:00
Pierre Souchay fa37f262eb Fixed comments for max DNS records returned as requested by @mkeeler 2018-05-31 18:15:52 +02:00
Wim d10e6d0292 Do reverse service lookup only if address doesn't match node 2018-05-21 22:27:41 +02:00
Wim 5c04864b28 Add support for reverse lookup of services 2018-05-19 19:39:02 +02:00
Pierre Souchay 486417a0fc Ensure to never send messages more than 64k 2018-05-16 12:47:35 +02:00
Pierre Souchay cfa5986df7 Fixed unit tests and updated limits 2018-05-16 12:11:49 +02:00
Pierre Souchay 6e80b6b127 Re-Enable compression while computing Len(), so we can send more answers 
This will fix https://github.com/hashicorp/consul/issues/4071
 2018-05-16 11:00:51 +02:00
Kyle Havlovitz ba3971d2c1
Remove deprecated metric names 2018-05-08 16:23:15 -07:00
Pierre Souchay 076ecf9712 Removed unecessary copy of Extra and index 2018-04-20 22:51:04 +02:00
Pierre Souchay 728c5308df Fixed sync of Extra in binarySearch 2018-04-18 14:17:44 +02:00
Pierre Souchay fadfb95e07 Added Unit tests + fixed boudary limit 2018-04-17 09:31:30 +02:00
Pierre Souchay c838376dfa Added comment for function dnsBinaryTruncate 2018-04-17 01:10:52 +02:00
Pierre Souchay 94c0bf978a Perform a binary search to find optimal size of DNS responses 
Will fix https://github.com/hashicorp/consul/issues/4036

Instead of removing one by one the entries, find the optimal
size using binary search.

For SRV records, with 5k nodes, duration of DNS lookups is
divided by 4 or more.
 2018-04-17 00:50:00 +02:00
Kyle Havlovitz af4be34a2a
Update make static-assets goal and run format 2018-04-13 09:57:25 -07:00
Matt Keeler 0619efc254 GH-3798: More PR Updates 
Update docs a little
Update/add tests. Make sure all the various ways of determining the source IP work
Update X-Forwarded-For header parsing. This can be a comma separated list with the first element being the original IP so we now handle csv data there.
Got rid of error return from sourceAddrFromRequest
 2018-04-12 10:40:46 -04:00
Matt Keeler cec8d5145b GH-3798: A few more PR updates 2018-04-11 20:32:35 -04:00
Matt Keeler d065d3a6db GH-3798: Updates for PR 
Allow DNS peer IP as the source IP.
Break early when the right node was found for executing the preapred query.
Update docs
 2018-04-11 17:02:04 -04:00
Matt Keeler 45a537def9 GH-3798: Add near=_ip support for prepared queries 2018-04-10 14:50:50 -04:00
Matt Keeler 27899f9f46
Merge pull request #3948 from pierresouchay/fix_tcp_dns_limit 
[BUGFIX] do not break when TCP DNS answer exceeds 64k
 2018-03-30 16:25:23 -04:00
Matt Keeler ebc6f414ac Formatting update 2018-03-27 16:31:27 -04:00
Matt Keeler 3facce6bfa GH-3854: Warn when node name isnt a valid DNS label 2018-03-27 15:00:33 -04:00
Pierre Souchay 93fa1f6f49 Optimize size for SRV records, should improve performance a bit 
Stricter Unit tests that checks if truncation was OK.
 2018-03-09 18:25:29 +01:00
Pierre Souchay ce3f47a75d Performance optimization for services having more than 2k records 2018-03-08 00:26:41 +01:00
Pierre Souchay 7d59249d96 Avoid issue with compression of DNS messages causing overflow 2018-03-07 23:33:41 +01:00
Pierre Souchay b77fd5ce9d 64000 max limit to DNS messages since there is overhead 
Added debug log to give information about truncation.
 2018-03-07 16:14:41 +01:00
Pierre Souchay be39fb20cc [BUGFIX] do not break when TCP DNS answer exceeds 64k 
It will avoid having discovery broken when having large number
of instances of a service (works with SRV and A* records).

Fixes https://github.com/hashicorp/consul/issues/3850
 2018-03-07 10:08:06 +01:00
Pierre Souchay 0b7f620dc6 Allow to control the number of A/AAAA Record returned by DNS 
This allows to have randomized resource records (i.e. each
answer contains only one IP, but the IP changes every request) for
A, AAAA records.

It will fix https://github.com/hashicorp/consul/issues/3355 and
https://github.com/hashicorp/consul/issues/3937

See https://github.com/hashicorp/consul/issues/3937#issuecomment-370610509
for details.

It basically add a new option called `a_record_limit` and will not
return more than a_record_limit when performing A, AAAA or ANY DNS
requests.

The existing `udp_answer_limit` option is still working but should
be considered as deprecated since it works only with DNS clients
not supporting EDNS.
 2018-03-06 02:07:42 +01:00
Andrei Burd b608091014 adding human readability for dns requests debug log (#3751) 2018-02-11 09:02:28 -06:00
Veselkov Konstantin 5f38e1148a fix refactoring 2018-01-28 22:53:30 +04:00
Veselkov Konstantin 7de57ba4de remove golint warnings 2018-01-28 22:40:13 +04:00
Frank Schröder 350932161d dns: return NXDOMAIN if datacenter is invalid (#3200) (#3596) 
Queries to the DNS server can contain an optional datacenter
name in the query name. You can query for 'foo.service.consul'
or 'foo.service.dc.consul' to get a response for either the
default or a specific datacenter.

Datacenter names cannot have dots, therefore the datacenter
name can refer to only one element in the DNS query name.

The DNS server allowed extra labels between the optional
datacenter name and the domain and returned a valid response
instead of returning NXDOMAIN. For example, if the domain
is set to '.consul' then 'foo.service.dc1.extra.consul'
should return NXDOMAIN because of 'extra' being between
the datacenter name 'dc1' and the domain '.consul'.

Fixes #3200
 2017-10-20 16:49:17 -07:00
Ryan Slade 85e4aea9d1 Replace time.Now().Sub(x) with time.Since(x) 2017-10-17 20:38:24 +02:00
Kyle Havlovitz c728564994
Update metric names and add a legacy config flag 2017-10-04 16:43:27 -07:00
Patrick Sodré 7501331d13
Implement encodeKVasRFC1464 function 2017-09-28 12:32:46 +02:00
Patrick Sodré 865f087ec9
Turn encodeKVasRFC1464 into a plain function 2017-09-28 12:32:45 +02:00
Patrick Sodré d5e3b9d843
Refactor formatTxtRecords as encodeKVasRFC1464 
- Move the logic of rfc1035 out of the encoding function
  - Left basic version of encodingKV as 'k=v'
 2017-09-28 12:32:45 +02:00
Patrick Sodré 655c89ee10
Fix editorial suggestions 2017-09-28 12:32:45 +02:00
Patrick Sodré afb0c92334
Remove redundant check of Node.Meta size 2017-09-28 12:32:45 +02:00
Patrick Sodré 53e812e759
Return Node.Meta info using the DNS interface 2017-09-28 12:32:45 +02:00