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Ok, virtualization again. Trying this approach on a Dell PowerEdge 2950.

• https://linuxcontainers.org/
• http://docs.oracle.com/cd/E37670_01/E37355/html/ol_config_os_containers.html
• http://wiki.centos.org/HowTos/LXC-on-CentOS6

Starting with the latter.

When you get the SElinux policy, create the *.te file then

[root@petaltail ~]# vi lxc.te
[root@petaltail ~]# semodule -l | grep lxc
[root@petaltail ~]# checkmodule -M -m -o lxc.mod lxc.te
checkmodule:  loading policy configuration from lxc.te
checkmodule:  policy configuration loaded
checkmodule:  writing binary representation (version 10) to lxc.mod
[root@petaltail ~]# semodule_package -o lxc.pp -m lxc.mod
[root@petaltail ~]# semodule -i lxc.pp
[root@petaltail ~]# semodule -l | grep ^lx
lxc     1.0

Ah, I'm simply going to CentOS7 because LXC is fully integrated

• http://www.theregister.co.uk/2014/07/07/centos_7_gm/

Ah, no. Took a look at v7 and it's very different with the over engineering part of system control. Will learn later, back to v6.5. I also want to preserve the ability to run different OS flavors which is not possible under LXC containers.

• Followed the primary setup on this page
  • http://www.howtoforge.com/virtualization-with-kvm-on-a-centos-6.4-server
• Once virt-manager worked we followed this doc a bit setting up bridges etc
  • http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CDQQFjAB&url=http%3A%2F%2Flinux.dell.com%2Ffiles%2Fwhitepapers%2FKVM_Virtualization_in_RHEL_6_made_easy.pdf&ei=GZfjU9P2KqS-sQS5p4HgCw&usg=AFQjCNFgCfRXV-g4eGE_Fm5AiIw4thnfYg&bvm=bv.72676100,d.cWc&cad=rja
    • for future reference, more details
      • http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CC4QFjAA&url=http%3A%2F%2Flinux.dell.com%2Ffiles%2Fwhitepapers%2FKVM_Virtualization_in_RHEL_6_Made_Easy_Part2.pdf&ei=GZfjU9P2KqS-sQS5p4HgCw&usg=AFQjCNGzBgZ3f-YvCbV5sav7450BX_Io6Q&bvm=bv.72676100,d.cWc&cad=rja
• But once I got to the cloning part, I found this to be super easy and scritpable
  • http://rwmj.wordpress.com/tag/virt-clone/

First I build my v1 clone the way I wanted it from ISO and then customized it manually. Added second bridge (br1, public) later via virt-manager GUI (view the details of vm and then select Add Hardware). Power this clone up, add to a test queue, and sbumit some jobs to make it all works. Then clone.

virt-install --connect=qemu:///system -n v1 -r 1024 --vcpus=1 \
--disk path=/var/lib/libvirt/images/v1.img,size=8 \
-c /var/lib/libvirt/images/CentOS-6.5-x86_64-bin-DVD1.iso \
--vnc --noautoconsole --os-type linux --os-variant rhel6 --accelerate \
--network=bridge:br0 --hvm

Here are the steps for cloning vm v1 to v5. You'll need guestfish' part of the libguestfs programs * yum install libguestfs-tools-c Next we'll create the v5.img block device, dump the v1 config into v5.xml and then edit that file. UUID and Mac Address we'll edit and the last 2 characters to '05'. Name becomes v5 from v1 and we'll similarly adjust the block device location-filename. Then we define this v5 vm. Launch guesfish' and make the same edits to Mac Address in files listed below. The boot the vm.

# cd /var/lib/libvirt/images
# dd if=v1.img of=v5.img bs=1M

# virsh dumpxml v1 > /tmp/v5.xml
# vi /tmp/v5.xml
(change name, uuid, file location, mac address(es))

# virsh define  /tmp/v5.xml
Domain v5 defined from /tmp/v5.xml

# guestfish -i -d v5

Welcome to guestfish, the libguestfs filesystem interactive shell for
editing virtual machine filesystems.

Operating system: CentOS release 6.5 (Final)
/dev/vg_v1/lv_root mounted on /
/dev/sda1 mounted on /boot

><fs> edit /etc/sysconfig/network
(change hostname)
><fs> edit /etc/sysconfig/network-scripts/ifcfg-eth0
><fs> edit /etc/sysconfig/network-scripts/ifcfg-eth1
(for nics comment out any UUID lines, change hardmare address, change IP)
><fs> edit /etc/udev/rules.d/70-persistent-net.rules
(change hardware address)
><fs> exit

# virsh start v5
Domain v5 started

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