Yep, I do _KNOW_ this. Mostly because
we running alternative version of console for our customers, which
is websocket web2.0 based, not the ugly Java-VNC applet.
Anyway, here the story:
When PV VM starts, xenconsoled creates a unix-98 pseudo-terminal:
/dev/pts/X for VM console.
If someone use xenconsole, or xl console (same thing) or use it
own application for VM console access it simply open /dev/pts/num
and operates.
Oder version of XCP have only one way to access Vm consoles - via
VNC. It was specific service (vncterm) wich open /dev/pts/X and
listen on localhost to provide consoles via VNC. xapi wrap it to
http/ssl and allows to connect to console with known key. Xapi had
a special (undocumented) key for vm:
other-config:disable_pv_vnc=true, which simply says xapi 'hands
of' from /dev/pts.
New version of XCP (1.6) now provides VT100 (actually, simple byte
stream) connection to VM and ignores key 'disable_pv_vnc'. If two
or more listeners are connected to same /dev/pts/X, some bytes
streamed to one reader, some to other... Mess and pure chaos.
Morale:
1) Use xe console vm=vm_name to get local access to PV console.
OR
2) Connect to VNC to specified port (xenstore-read
/local/domain/DOMID/console/tc-port)
We decided to go second way. If you just want to see vm console on
console (lol), use xe console.
02.12.2012 12:26, Grant McWilliams пишет:
Our team has noticed that the /usr/lib/xen/binxenconsole has
stopped working on all XCP 1.6 systems (including final). We
initially thought it was a problem with running XCP inside of
VirtualBox which we do on occasion. Upon moving our physical
hosts to XCP 1.6 we also noticed that it's
happening consistently on real XCP 1.6 hosts as well. Using the
XCP VM install tutorials I wrote
here results
in a hung terminal. During the kickstart/preseed installs the
console does output garbled data so you can tell when the
install is over but it's not legible enough to interact with the
installer. Once the VM has rebooted and you try to log in the
console just hangs. Sometimes after about 5-10 minutes it will
show the login prompt but then be unresponsive. These tutorials
work for XCP 1.0 to 1.5b.
Anyone have any idea why?
Grant McWilliams
Xenapi Admin Documentation Project
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