943359 - Operational SRV entries to support HTTP/2 data experiment

Status: RESOLVED FIXED

(Infrastructure & Operations :: DNS and Domain Registration, task)

Description

[Patrick McManus [:mcmanus]]

In order to support HTTP/2 data gathering efforts, and specifically bug 942317 I need a couple DNS SRV records established in mozilla.org. These records will see query rates less than the daily ping volume of our pre-release channels (only pre-release users with telemetry enabled will make the query, they will make it no more than the daily ping query is already made, and they will make it no more than once a session.) No connections will be made the addresses returned by the record (though the addresses should be constants so they can be verified in the experiment).

Specifically

1] a wildcard domain that provides an a record for *.http2test.mozilla.org (return any constant IP.. unroutable would be good :) and a short ttl)

2] a wildcard domain that provides an srv record for *.http2test.mozilla.org .. returning something like pri=100 weight=100 port=443 target=success.http2test.mozilla.org and a short ttl


The data will all be collected via telemetry on the client. The goal here is to look up the a and srv in parallel and correlate their arrival times (and in the case of SRV its success rate - as certainly anything other that A has some reachability problems - we want to find out how bad).

The only reason these need to be in mozilla.org, and link their use to aus, is to preserve the same level of privacy user's already have. at this point I don't want to fool around with cnames or levels of redirections that would muddy the waters. If there is a different zone that aus typically cname's to then it would be fine to use that instead - I just don't want to chase the cname or be loadbalanced in the experiment.

Comment 1

[Brian Hourigan [:digi]]

Hi Doug,

We went ahead and setup a wildcard A record for *.http2test.mozilla.org to point to 127.0.0.1 with a very short TTL of 60 seconds. We also setup a wildcard SRV record for *.http2test.mozilla.org ith the priority, weight, port, and target as requested. This record also has a very short TTL of 60 seconds.

bhourigan@digi ~ » dig +short test.http2test.mozilla.org SRV @8.8.8.8
100 100 443 success.http2test.mozilla.org.

I think everything has been setup as requested. If anything else comes up feel free to ping me on irc (digi) or update the bug.

Comment 2

[Patrick McManus [:mcmanus]]

thanks brian. will be in touch if anything comes up.

Comment 3

[Doug Turner (:dougt)]

over to mcmanus -- please let us know when this can be removed.

Comment 4

[Brian Hourigan [:digi]]

If everything is working as expected I'd like to close the bug. When you folks are ready to remove the records you can file a new request in the same component.

Comment 5

[Patrick McManus [:mcmanus]]

:digi - sure, we'll reopen if there is a problem in the meantime.

Comment 6

[Brian Hourigan [:digi]]

Thanks!