[one-users] Attach a console to kvm instance to debug network/boot issue

Gavin netmatters at gmail.com
Wed Aug 26 08:18:18 PDT 2009


2009/8/26 Gavin <netmatters at gmail.com>:
> After battling with the kvm console issue I decided to go back to Xen,
> but I then realised that Xen support in Ubuntu/Debian is becoming less
> and less, and Xen seems to have a lot of issues these days.
>
> So after you email I went back to kvm and made use of the vnc option
> and I can now console successfully into my vm's.
>
> Now all I need to do is figure out how to modify the vmcontext.sh
> script to be compatible with kvm.
>
> On this note, I notice that there is now another method to
> contextualise a vm, the ISO method.
>
> Which is the recommended way to contextualise a vm and can anyone help
> with some pointers on a dual-homed kvm guest ???
>
> Sorry, but I have only recently started using kvm so am still getting
> to know how it works, what commands do what and so on.

Ok, so I am making some decent progress here....

Firstly the issue I was having with bringing up the interface(s) had
to do with am incorrect mac prefix, so fixed that.

Now I am using the vmcontext.sh script which is installed on the guest
in /etc/init.d/vmcontext.sh which is symlinked to
/etc/rc2.d/S01vmcontext.sh.

When the VM boots I am seeing the following errors:-

/etc/rc2.d/S01vmcontext.sh: 107: let: not found

and

[: 125: eth0: unexpected operator

and

/etc/rc2.d/S01vmcontext.sh: 125: let: not found

and

[: 125: eth0: unexpected operator

and my /etc/network/interfaces looks like this:-

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
  address ...
  network ...0
  netmask 255.255.255.0

auto eth1
iface eth1 inet static
  address ...
  network ...0
  netmask 255.255.255.0

However my vm does manage to get an IP via dhcp so I can still log in.....

It seems the vmcontext.sh script is not catching th IP variable correctly.

Has anyone else come across this before ??

Thanks!!
Gavin


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