retrieving facter_ec2_metadata from hostvars - can't get element in macs

[Chris Jefferies]

I can drill down into hostvars like this:

    - debug:
        msg: "looking at interface macs: {{ hostvars[inventory_hostname].facter_ec2_metadata.network.interfaces.macs }}"

And I get something like this:

ok: [db01.deva.ecm] => {
    "msg": "looking at interface macs: {u'xx:xx:xx:xx:xx:xx': {u'local-hostname': u'ip-10-1-1-9.us-west-1.compute.internal', u'security-groups': u'sg_me', u'vpc-ipv4-cidr-blocks': u'10.1.0.0/16', u'subnet-id': u'subnet-009ae259d26e44f23', u'vpc-ipv4-cidr-block': u'10.1.0.0/16', u'interface-id': u'eni-0f706387a1423f329', u'mac': u'xx:xx:xx:xx:xx:xx, u'security-group-ids': u'sg-034d209d935486e41', u'local-ipv4s': u'10.1.1.10', u'owner-id': u'784710449476', u'subnet-ipv4-cidr-block': u'10.1.1.0/24', u'device-number': u'0', u'vpc-id': u'vpc-1710943aba582459a'}}"
}

I get an error if I try to find the first/only mac address with the [0] approach like this:

{{ hostvars[inventory_hostname].facter_ec2_metadata.network.interfaces.macs[0] }}

or 

{{ hostvars[inventory_hostname].facter_ec2_metadata.network.interfaces.macs.0 }}

What's the trick to get to the values within the mac address?

Any tips would be appreciated,  thanks,

Chris.

[Chris Jefferies]

ansible 2.7.1

  config file = /etc/ansible/ansible.cfg

  configured module search path = [u'/Users/cjefferies/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']

  ansible python module location = /Library/Python/2.7/site-packages/ansible

  executable location = /usr/local/bin/ansible

  python version = 2.7.10 (default, Aug 17 2018, 17:41:52) [GCC 4.2.1 Compatible Apple LLVM 10.0.0 (clang-1000.0.42)]

[Kai Stian Olstad]

macs is a dict and not a list. Therefor using 0 to get the fist list element wont work.

To get information out of a dict you need to use the key which is the mac address in you case.


--
Kai Stian Olstad

[Chris Jefferies]

That's too bad because I don't have the mac address before I need to read its attributes.  How might a person get a list of the mac addresses associated with the interfaces?

Thanks for the info.

Chris.

[Kai Stian Olstad]

On 09.03.2019 02:47, Chris Jefferies wrote:
> That's too bad because I don't have the mac address before I need to read
> its attributes. How might a person get a list of the mac addresses
> associated with the interfaces?

You could try using python method to get the keys .....macs.keys() this will return the list of all keys in macs.
So the fist one would be .....macs.keys()[0]


--
Kai Stian Olstad

[Chris Jefferies]

That worked, Kai.  Thank you.