Help generating device report in Ansible

[asi...@net-sense.com]

Hello,

I'm fairly new to Ansible and trying to do something very simple.  I want to collect a piece of information (version number) from a number a network devices and generate a simple report.

 - name: Get Data from devices

   gather_facts: False

   hosts: all

   connection: local

   roles:

     - Juniper.junos

   tasks:

        - name: Netconf test

          wait_for: host={{ inventory_hostname }} port=830  timeout=5

        # Do a quick test to gather facts

        - name: Getting Facts

          junos_get_facts: host={{ inventory_hostname }} logfile=tmp.log user=me passwd=passwd123

          register: data

        - name: Save version data to jinja2 template

          template: src=junos_version_report.j2 dest=./ver_report.txt

Here is the j2 file:

Device         Serial Number         Version

---------      -------------         ------------

{% for i in play_hosts %}

{{ i }}     {{ data.facts.serialnumber }}

{% endfor %}

The problem is when the report is written to the file, the information in the "data" variable is only from the last device that set it... As you can see, the Serial number is reported as being identical for each device ( which it is not...)

Device     Serial Number         Version

---------      -------------         ------------

dev1     77633B97ACF0

dev2     77633B97ACF0

dev3     77633B97ACF0

I've seen an example like this with the hostvars variable but how do I define my own variable to be an array like hostvars so I can then reference each object in the array.  For example:

{{ data[i].facts.serialnumber }}

Or open to other ideas?

Thanks

Al

[Kai Stian Olstad]

Change the line to this.

{{ i }} {{ hostvars[i].data.facts.serialnumber }}

--
Kai Stian Olstad

[asi...@net-sense.com]

hostvars[i] works because that is predefined variable in ansible.  However "data" is not.  I tried data[i].facts.serialnumber but I get an error back thats says data is undefined.  

Thx

[Kai Stian Olstad]

On 20. mars 2017 21:17, asi...@net-sense.com wrote:
> On Monday, March 20, 2017 at 3:51:37 PM UTC-4, Kai Stian Olstad wrote:
>>

> hostvars[i] works because that is predefined variable in ansible. However
> "data" is not. I tried data[i].facts.serialnumber but I get an error back
> thats says data is undefined.

Did you try my suggestion? You syntax is wrong, thats why I wrote what I
wrote.

"data" exist since you used "register: data" on the task before called
"Netconf test".

--
Kai Stian Olstad

[asi...@net-sense.com]

That was it Kia..  Thank you.  I should have looked at your response more closely.  I missed that you had "data" as a child of hostvars.  So is that true in all cases any time you define a register variable?  That variable will be a child within hostvars?

Thank you again.

{{ hostvars[i].data.facts.serialnumber }} 

[asi...@net-sense.com]

Any recommendations for problem related to this solution.  If connectivity to any one devices fails, then the registered variable (data) is not accessible for any of the other devices that actually passed.  This results on the following error when the jinja2 template part of the playbook is executed.  I understand the data variable not being available for the device that failed but why isn't available for the other 3 devices that collected the data with no problems??

Thx

fatal: [device1]: FAILED! => {"changed": false, "failed": true, "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'facts'"}

fatal: [device2]: FAILED! => {"changed": false, "failed": true, "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'facts'"}

fatal: [device3]: FAILED! => {"changed": false, "failed": true, "msg": "AnsibleUndefinedVariable: 'dict object' has no attribute 'facts'"}

[asi...@net-sense.com]

Ok, I got around this issue by editing the jinja template file to make sure the variable existed before referencing it.... Then everything fell into place.  The error message was throwing me off a bit as it was saying the variable did not exist even for the devices that passed.  Anyhow, this is what I added to jinja template...

{%if hostvars[i].data.facts is defined %}

{{ "%-15s"|format(i) }} {{ "%-15s"|format(hostvars[i].data.facts.serialnumber) }} {{ "%-s"|format(hostvars[i].data.facts.version) }}

{% else %}

{{ "%-15s"|format(i) }} {{ "%-15s"|format('--') }} {{ "%-s"|format('--') }}

{% endif %}

Thanks

Al