Condition in Templates

[jpall...@gmail.com]

Hi everyone,

one simple question and sry for my english skills :-)

I have a playbook with some templates, in one template I added a condition to write a specific IP Address in my template.

(My servers have several network ports and unfortunately they have sometimes different names. Ok, i could use different templates but i wanted to use a single file)

The code:

{% if ansible_mgt.ipv4.address is defined %}

server_address={{ansible_mgt.ipv4.address}}

{% else %}

server_address={{ansible_eth0.ipv4.address}}

{% endif %}

If I run the playbook against a server which has not the network port ansible_mgt the playbook fails because the variable ansible_mgt.ipv4.address is not defined.

What I am doing wrong? Or it is not possible to check in a template if a variable is not defined?

Thanks for your help!

Regards,

Jost

[David Karban]

Hi, 

I guess, in that case not even ansible_mgt will be defined? What is exact error message (try ansible-playbook with -vvv) ?

David

Linux server specialist/Specialista na správu linuxových serverů
www.karban.eu

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[jpall...@gmail.com]

Hi David,

the error message is:

fatal: [testserver.xxx] => {'msg': "AnsibleUndefinedVariable: One or more undefined variables: 'ansible_mgt' is undefined", 'failed': True}

fatal: [testserver.xxx] => {'msg': "AnsibleUndefinedVariable: One or more undefined variables: 'ansible_mgt' is undefined", 'failed': True}

FATAL: all hosts have already failed -- aborting

Well, that is true. On this machine I have only ansible_eth0:

        "ansible_eth0": {

            "active": true,

            "device": "eth0",

            "ipv4": {

                "address": "10.101.10.133",

                "netmask": "255.255.255.0",

                "network": "10.101.10.0"

            },

My idea was to use the condition, if ansible_mgt is defined -> use ansible_mgt and if not -> ansible_eth0

Regards,

Jost

[David Karban]

Hi Josh, 

your idea is right:

{% if ansible_mgt is defined and ansible_mgt.ipv4.address is defined %}

server_address={{ansible_mgt.ipv4.address}}

{% else %}

server_address={{ansible_eth0.ipv4.address}}

{% endif %}

you have to check ansible_mgt first.

David
Linux server specialist/Specialista na správu linuxových serverů
www.karban.eu

To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/f3228aec-cbf2-470a-ba06-883f8007bdf0%40googlegroups.com.

[jpall...@gmail.com]

Hi David,

of course! thank you very much! 

I didn't recognized that the error message was only saying "ansible_mgt" and not "ansible_mgt.ipv4.address"...facepalm

Regards,

Jost