Hi,
On 09/26/2015 02:04 AM, Christopher Schultz wrote:
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Graham,
On 9/25/15 7:23 PM, Graham Leggett wrote:
On 25 Sep 2015, at 10:33 PM, Christopher Schultz
<ch...@christopherschultz.net> wrote:
While I obviously agree with the sentiment, I do feel bad for
the OP who has to fight this battle.
It is important however to clarify that this isn’t a typical
scenario, lest someone cites this thread as to why they should be
doing the same thing.
1. All the code we currently have in tcnative uses APR for
everything, and I'm not sure if APR supports AF_UNIX sockets, or
even if it would have to support them to do this.
The as-yet-unreleased v1.6 of APR does support unix domain
sockets, although the docs for it don’t appear to be very clear.
2. The plumbing required to configure an AF_UNIX socket is
non-trivial, and it's currently all wired-around using AF_INET
sockets, so it's got hostname, port, etc. I suppose we could
stuff the inode's name into the hostname and ignore the port
number or something like that, but it's fairly hacky.
Currently APR seems to accept the UDS filename where the IP
address would otherwise be provided.
So this is a non-trivial amount of work, here.
Srini, is there any chance your employer would pay someone to
write this code? Patches are always welcome, and Tomcat is
otherwise completely free…
If there was a push for unix domain sockets from Tomcat it would
definitely help working out whether the APR_UNIX implementation
does what it needs to do, and gets properly documented and v1.6
released.
I don't really see this happening.
I'm fairly sure that the widespread use of HTTP/2 is going to kill AJP
forever, leaving only mod_proxy_http(2) as a viable long-term
connector. Nobody is ever going to bother writing an AF_UNIX connector
for HTTP/2, so I think this idea is very likely to die in this thread.
Not sure on this, as AJP is quite handy. Expecialy load balancing java
webapps and i find mod_jk quite good at this.
Out of curiosity, why do you think so? What does offer HTTP/2 that can
be handy in a reverse proxy scenario? Compression / streams?
- -chris
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