Getting data from json format

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1

Hi all,

I have just discovered ansible and I must admit in certain tasks it this way easier to use ansible than puppet :slight_smile:
It is really stunning how easy are some tasks - thanks guys :slight_smile:

I am trying to get some data from nodes. I have just run

ansible -m setup node100

but I get output in json (I guess):

node100 | success >> {
ā€œansible_factsā€: {
ā€œansible_all_ipv4_addressesā€: [
ā€œx.x.x.xā€
],
ā€œansible_architectureā€: ā€œx86_64ā€,
ā€¦

ā€¦

Is there any easy way to read data from particular fields, i.e.:
var1 = ansible_facts ā†’ ansible_all_ipv4_addresses
Python-native way:
(var1, var2, var3) = (ansible_facts ā†’ ansible_all_ipv4_addresses, ansible_facts ā†’ ā€¦, ansible_facts ā†’ ā€¦)
would be ideal :wink:

Thanks
Przemek

2

If you want to use this in a playbook or template, this is pretty straightforward.

Jinja2 evaluation is basically Python. The only thing is you canā€™t do list comprehensions.

First element:

{{ ansible_all_ipv4_addresses[0] }}

3

At first I wanted to use it in the CLI (listing some facts about nodes) so I guess I need to download some external json parser.
Am I right ?

Regarding using it in a playbook/template: can you provide simple but full example how to use it ?

4

ā€œRegarding using it in a playbook/template: can you provide simple but full example how to use it ?ā€

http://ansibleworks.com/docs

5

Does anybody know how to parse the output from the following command ?
ansible groupofhosts -m setup -a ā€˜filter=some_filterā€™
?

6

Why do you want to parse the output of this command?

7

To gather config data from nodes for further analysis.

8

Ok, so the API is great for that.

You also have --tree mode to dump things into individual JSON files per host.

9

Where I could read about it ?
Any example program ?

10

ansible with the --help flag, then just try the option.

It will output JSON files into the specified directory with one file per hostname.

11

Oh I see Michael - I am testing the ā€œtreeā€ option now :slight_smile:
I was asking about API: docs + examples.

12

Yeah /usr/bin/ansible is a pretty self explanatory example of the Runner API.

I would look at that closely.