[ovirt-users] Re: ovirt_vm ansible cloud-init ipv6 related

20 Jun 2019

      Hello Ondra,

Thank you for reporting an issue, its appreciated.

I have to ask something additional, if you had experience with it:
- to work around the current situation, I have added /etc/cloud/cloud.cfg.d/99_custom-networking.cfg file with following content:

network:
  version: 2
  ethernets:
    eth0:
      dhcp4: true
      dhcp6: true
    eth1:
      dhcp4: true
      dhcp6: true

- this works, meaning that DHCPV6 address is added,  but it results in following situation: the RA route is killed,  rendering VM unreachable
- to solve this one , we added following line, route to link-local ipv6 of the vlan with runcmd:
runcmd:
  - [ ip, "-6", route, add, default, via, "ipv6 : link : local ", dev, eth0 ]

Still, this yaml is completely ignored/not even parsed. Cloud-init complains (looking at the logs) of the bad datasource, but I have configured following in the cloud.cfg:
datasource_list: ["NoCloud", "ConfigDrive"] 

Thnak you.

On 19/06/2019, 12:25, "Ondra Machacek" <omachace@redhat.com> wrote:

    Hello,

    thanks for the report. This is indeed supported by oVirt, but it's not
    supported by ovirt_vm Ansible module, I've opened an issue[1]. Thanks.

    [1] https://github.com/ansible/ansible/issues/58054

    On 17/06/2019 15:18, Vrgotic, Marko wrote:
    > Dear oVirt
    > 
    > Would you be so kind to help out clarifying if and how is IPv6 supported 
    > with
    > 
    > -ansible / ovirt_vm / cloud-init boot protocol.
    > 
    > I have created a VM template which by default uses cloud-init with 
    > following:
    > 
    > When I boot the VM from UI, each VM gets IPv4 DHCP and IPv6 DHCP6 
    > address, default cloud-init setup and we have infrastructure for both 
    > IPv4 and IPv6.
    > 
    > However, when calling same template via Ansible ovirt_vm, using following:
    > 
    > cloud_init_nics:                                                                                              
    >    |~
    > 
    >           - nic_name: 
    > eth0                                                                                                
    > |~
    > 
    >             nic_boot_protocol: 
    > dhcp                                                                                       
    > |~
    > 
    >             nic_on_boot: true
    > 
    > each VM receives only IPv4 DHCP and only IPv6 RA, but not DHCP IPv6.
    > 
    > Looking at booted VM, following options are not set:
    > 
    >   * /etc/sysconfig/network => NETWORKING_IPV6=yes
    >   * Or /etc/sysconfig/network-scripts/ifcfg-eth0 => DHCPV6C=yes and
    >     IPV6INIT=yes
    > 
    > We need IPv6 DHCP6 address , especially for registering it host with DNS 
    > AAAA record.
    > 
    > Is this supported? Am I doing it wrong way?
    > 
    > If its supported please let me know, how can I make sure that VMs 
    > created using Ansible also initialize DHCPV6.
    > 
    > Please assist.
    > 
    > Marko Vrgotic
    > 
    > ActiveVideo
    > 
    > 
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