0

i'm currently investigating a Scenario, where a LXC Container, which was created on Ubuntu, is supposed to be migrated to a Container on SLES.

Is there a way to do that? Are there any Tools one could recommend?

user3383458
  • 113
  • 5

1 Answers1

0

There is nothing completely automated end-to-end, but 'virsh' provides a 'domxml-from-native' command that gives you a helping hand in building an XML configuration doc

$ cat container.cfg 
lxc.utsname = complex
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br0
lxc.network.hwaddr = 4a:49:43:49:79:bf
lxc.network.ipv4 = 10.2.3.5/24
lxc.network.type = macvlan
lxc.network.flags = up
lxc.network.link = eth0
lxc.network.hwaddr = 4a:49:43:49:79:bd
lxc.network.ipv4 = 10.2.3.4/24
lxc.network.ipv4 = 192.168.10.125/24
lxc.network.type = phys
lxc.network.flags = up
lxc.network.link = dummy0
lxc.network.hwaddr = 4a:49:43:49:79:ff
lxc.network.ipv4 = 10.2.3.6/24
lxc.cgroup.cpuset.cpus = 0,1
lxc.cgroup.cpu.shares = 1234
lxc.cgroup.devices.deny = a
lxc.cgroup.devices.allow = c 1:3 rw
lxc.cgroup.devices.allow = b 8:0 rw
lxc.rootfs = /mnt/rootfs.complex
lxc.cap.drop = sys_module mknod setuid net_raw
lxc.cap.drop = mac_override

$ virsh -c lxc:/// domxml-from-native lxc-tools container.cfg 
<domain type='lxc'>
  <name>complex</name>
  <uuid>1e600565-6421-4826-a511-20fdd4a5236c</uuid>
  <memory unit='KiB'>65536</memory>
  <currentMemory unit='KiB'>65536</currentMemory>
  <vcpu placement='static' cpuset='0-1'>1</vcpu>
  <cputune>
    <shares>1234</shares>
  </cputune>
  <os>
    <type>exe</type>
    <init>/sbin/init</init>
  </os>
  <features>
    <capabilities policy='allow'>
      <mknod state='off'/>
      <net_raw state='off'/>
      <setuid state='off'/>
      <sys_module state='off'/>
    </capabilities>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/libvirt_lxc</emulator>
    <filesystem type='mount' accessmode='passthrough'>
      <source dir='/mnt/rootfs.complex'/>
      <target dir='/'/>
    </filesystem>
    <interface type='bridge'>
      <mac address='4a:49:43:49:79:bf'/>
      <source bridge='br0'/>
      <ip address='10.2.3.5' family='ipv4' prefix='24'/>
      <link state='up'/>
    </interface>
    <interface type='direct'>
      <mac address='4a:49:43:49:79:bd'/>
      <source dev='eth0' mode='private'/>
      <ip address='10.2.3.4' family='ipv4' prefix='24'/>
      <ip address='192.168.10.125' family='ipv4' prefix='24'/>
      <link state='up'/>
    </interface>
    <hostdev mode='capabilities' type='net'>
      <source>
        <interface>dummy0</interface>
      </source>
      <ip address='10.2.3.6' family='ipv4' prefix='24'/>
    </hostdev>
  </devices>
</domain>

This conversion isn't foolproof and can't handle every possible configuration option, but it should get you going in the write direction. Once you have a suitable XML config, then use virsh -c lxc:/// define to save it in libvirt

DanielB
  • 1,618
  • 7
  • 7