We are trying to create RHEL6.1 container and having trouble getting a
proper console to the container.
I have used lxc containers in the past and lxc has a script (lxc-fedora)
to setup a basic Fedora container. Is there something similar or docs
with virtmgr ?
We started out making a copy of the root fs and using that copy as the
root for the container. I made a couple of tweaks to the container rootfs:
1. ensured that /dev/ptmx is a symlink to pts/ptmx
2. Added 'newinstance' option to the devpts mount in fstab
The container xml file is attached.
If devpts entry in container's fstab has the 'newinstance' option, I get a
brief "domain test01 started" message on the stdout.
When I run 'virsh consle test01', I only see a few messages
---
Setting hostname node03: [ OK ]
Setting up Logical Volume Management: No volume groups found
[ OK ]
Checking filesystems
[ OK ]
mount: can't find / in /etc/fstab or /etc/mtab
Mounting local filesystems: [ OK ]
Enabling local filesystem quotas: [ OK ]
Enabling /etc/fstab swaps: [ OK ]
---
and then a hang wihtout a shell. At ths point sshd or any of the other
services don't appear to be running.
If I remove the 'newinstance' entry in fstab and run 'virsh start test01'
the container starts up ok. I get all "console" messages on whichever
is my current /dev/pts/0 !
At this point sshd and many other services are running and I can ssh in.
Even in this case, though 'virsh console test01' shows the same _few_
messages as above and no login shell.
Back to the newinstance case, by putting some debug messages in the
container's /etc/rc.sysinit, I see that devpts is already mounted
with newinstance.
With lxc, in setup_pts(), we unmount devpts in the container and then
mount with newinstance. I wonder what that sequence is with virtmgr.
I double checked that /dev/ptmx in container is a symlink to pts/ptmx
and that CONFIG_DEVPTS_MULTIPLE_INSTANCES=y.
Appreciate any tips on how I can get access to the console of the RHEL6.1
container.
Suka
Suka
