Hello list,
I'm trying to automate an API call that adds an 'A' record to the
linode DNS service. The relevant playbook snippet is:
----
- name: create linode 'A' record
uri:
url: "https://api.linode.com/?api_key={{ linode_api_key
}}&api_action={{ linode_api_action }}&domainid={{ linode_domain_id
}}&type={{ linode_record_type }}&target={{ public_ip }}&name={{
instance_name }}&TTL_sec={{ linode_record_ttl }}"
return_content: yes
register: json_resp
- name: set JSON response
set_fact:
linode_api_error: "{{ (json_resp.content|from_json).ERRORARRAY.0
}}"
- fail: msg="Setting DNS entry failed with error '{{
linode_api_error.ERRORARRAY.0.ERRORMESSAGE }}'"
when: (linode_api_error is defined) # <=== The problem is here
- debug: msg="DNS A record set for '{{ instance_name }}.host.com'
targets to '{{ public_ip }}'"
when: (linode_api_error not defined) # <=== The problem is here
----
A successful entry looks returns a JSON object that looks like this (the
ERRORARRAY is empty):
{
"ACTION": "domain.resource.create",
"DATA": {
"ResourceID": 8016441
},
"ERRORARRAY": []
}
An unsuccessful entry looks like this:
{
"ACTION": "domain.resource.create",
"DATA": {},
"ERRORARRAY": [
{
"ERRORMESSAGE": "Authentication failed",
"ERRORCODE": 4
}
]
}
After I figured how the API works[1] I opted for a check on the JSON
"ERRORARRAY" dictionary. But every approach I took failed. What I'd like to
achieve is the following:
1) If the "linode_api_key" is defined make the URI call (this is not
implemented here in case you're wondering). The variable is set by
linode_api_key: "{{ lookup('env','LINODE_API_KEY') }}" - not sure what
happens when the env variable is not set.
2) If the "uri" call returns error (this can be checked only by the
ERRORARRAY), fail.
Any suggestions on how to fix the code or handle this in a more optimised
way are more than welcome!
[1]: My first thought was to test against status code (401 for failure and
20x for success). But a failed request will still return a "200" status
code. I believe that is a peculiar API design choice. I think that Facebook
returns "200" for failed calls too.
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