Force ansible to use IPv4 / IPv6?

[John Oliver]

I've run into a minor problem where one of my hosts has an AAAA record for an address assigned via DHCP6, but it isn't acquiring that address.  I can connect via the IPv4 address just fine.  I'm looking for a switch to tell ansible / ansible-playbook to force a connection over one protocol so I don't have to come up with some lower-level hack, forget about it, and have it cause another problem tomorrow :-)

[Greg Andrews]

Off the top of my head:

1. Do the IPv4 and IPv6 addresses have different hostnames in DNS?  If so, use the hostname for the address that's usable.
2. In the ansible machine's .ssh/config file, you can enter something like this:

HOST problem-hostname
    AddressFamily inet

According to my man page for ssh_config, "inet" is IPv4 and "inet6" is IPv6.

  -Greg

On Mon, Jan 12, 2015 at 4:04 PM, John Oliver <jno...@gmail.com> wrote:

I've run into a minor problem where one of my hosts has an AAAA record for an address assigned via DHCP6, but it isn't acquiring that address.  I can connect via the IPv4 address just fine.  I'm looking for a switch to tell ansible / ansible-playbook to force a connection over one protocol so I don't have to come up with some lower-level hack, forget about it, and have it cause another problem tomorrow :-)

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[Tom Bamford]

Should be able to do this with ssh-config.

Don't forget to tell your client to fix their brain-dead DNS! :-)

On 13 January 2015 at 02:04, John Oliver <jno...@gmail.com> wrote:

I've run into a minor problem where one of my hosts has an AAAA record for an address assigned via DHCP6, but it isn't acquiring that address.  I can connect via the IPv4 address just fine.  I'm looking for a switch to tell ansible / ansible-playbook to force a connection over one protocol so I don't have to come up with some lower-level hack, forget about it, and have it cause another problem tomorrow :-)

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Tom Bamford

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