[Users] Sharing Unix Domain Sockets between VEs in devel version

[Kir Kolyshkin]

Stefan,

I suggest you file a bug to http://bugzilla.openvz.org/

Stefan Siegel wrote:
> Hello,
>
> Currently I have a Linux-VServer setup using the official Debian Etch 
> binaries with MySQL socket sharing similar to what is described in the 
> "Shared webhosting" article in the OpenVZ Wiki (it works the same with 
> Linux-VServer). Now that there probably will be official Debian Lenny 
> kernel images patched with OpenVZ support, I consider switching to 
> OpenVZ. The 2.6.26 images currently in Sid are very promising. But there 
> is a problem:
>
> When I try to setup socket sharing as described in 
> http://wiki.openvz.org/Shared_webhosting#MySQL_socket_sharing (or just 
> starting my Linux-VServer virtual machines in OpenVZ) I cannot connect 
> to a socket listening in a different VE. Only when I connect from the 
> same VE the connection succeeds. I tried:
> - hardlinking the socket
> - bind mounting the containing directory
> - directly connecting from/to VE0
> I tried both MySQL and simply creating/connecting to the socket using 
> Netcat (the OpenBSD version works with Unix Domain Sockets). Related 
> strace output:
>
> [...]
> socket(PF_FILE, SOCK_STREAM, 0)         = 3
> fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
> connect(3, {sa_family=AF_FILE, path="testdir/testsocket"...}, 20)
>                                 = -1 ECONNREFUSED (Connection refused)
> close(3)                                = 0
> [...]
>
> Using linux-image-2.6.24-openvz-24-004.1d1-686_004.1d1_i386.deb from 
> download.openvz.org doesn't change anything, but when using the stable 
> linux-image-2.6.18-openvz-18-53.5d1-k7_028.53.5d1_i386.deb, I can 
> connect without problems.
>
> Am I missing something? Is the devel OpenVZ broken, or is it supposed to 
> be a feature and the stable version behavior is deprecated? Is it 
> configurable or is there a workaround? If the devel version's behavior 
> is correct, then the Wiki article should probably be changed to mention 
> that (and I would be forced to postpone my migration to OpenVZ). On the 
> article's discussion page there is a user who also failed getting this 
> to work.
>
> Greetings,
> Stefan Siegel
>
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