So I am running 'canary' tests post CI and pre deployment to test if the
newest code runs without error in a real environment.
The tests are just hitting a url and checking that it returns 200.
Sometimes it takes a little bit for the process I'm testing against to
become available which means my tests will fail if I run them before the
process is ready to serve requests. At first I was just having a pause in
between starting the process and running the test to give it time to come
up, but this is very brittle because that time can vary, and it is also
very inefficient if I wait for longer than I need to.
I then thought I could solve these problems by using a do-until loop. The
problem is, there is nothing I can check for in the registered var that
exists on both failure and success.
Example:
- name: run test
uri:
url: "https://0.0.0.0:3030/api/canary";
validate_certs: no
register: result
until: result['status'] == 200
This doesn't help because when the test fails because the url isn't ready
to serve requests, the register variable only contains something like:
{
"changed": false,
"failed": true,
"msg": "Socket error: [Errno 104] Connection reset by peer to
https://0.0.0.0:3030/api/canary";
}
Therefor, the until will fail with:
{
"failed": true,
"msg": "ERROR! The conditional check 'result['status'] == 200' failed. The
error was: ERROR! error while evaluating conditional (result['status'] ==
200): ERROR! 'dict object' has no attribute 'status'"
}
I thought that maybe "failed": false would exist in successful tests, but
that is not the case.
It's kind of a catch-22 because if the test succeeds the first time, I
don't need the do-until, but if it fails, then there is nothing for the
until to check against.
Any ideas on how to handle this?
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