parsing a nested json file

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1

hallo,

i have a nested json file like :
{
“fw1”: {
“ipv4”: {
“rtr”: {
“ip”: “1.2.3.4”,
“net”: “1.2.3.4”,

}
}
},
“fw2”: {
“ipv4”: {
“rtr”: {
“ip”: “4.3.2.1”,
“net”: “4.3.2.1”,

}
}
}
}

How could i parse in this case only the “ip” value of “fw2” ?
for a non nested json dictionary this phrase has worked for me

{{ (lookup('file', '/etc/foo.txt') | from_json).get('ip') }}.
2

{{ (lookup('file', '/etc/foo.txt') | from_json)['fw2']['ipv4']['rtr']['ip'] }}

or

{{ (lookup('file', '/etc/foo.txt') | from_json).fw2.ipv4.rtr.ip }}

3

Thanks alot dude. It did work ^^
i have recently got it working using lookup(‘file’, ‘/etc/foo.txt’) | from_json).get(‘fw2’).get(‘ipv4’).get(‘rtr’).get(‘ip’) # haha though it didn’t look quit pretty
i noticed if i am using an attribute with a minus sign i.e “fw2-m” the dot notation wouldn’t work.
Just curious how could one overcome this issue?

4

Python identifiers is not allowed to have dash in them(because dash is a subtraction), so only way around it in Ansible, is to use the square brackets notation.

5

can u please tell me why should one add a single parentheses to “from_json**)**.foo” ?