[GCE] Support default credentials #22723
Merged
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SUMMARY
When running on GCE, if the user doesn't specify credentials, we should fall back to Application Default Credentials. This change allows that to happen.
ISSUE TYPE
COMPONENT NAME
GCE
ANSIBLE VERSION
ADDITIONAL INFORMATION
Add support for default credentials. Practically, this means that a playbook creator would not have to specify the service_account_email or credentials_file Ansible parameters.
Default Credentials only work when running on Google Cloud Platform. The 'project_id' is still required.
A test has been added to trigger this condition.
TESTING
Be sure of the following:
service_account_email
,pem_file
orcredentials_file
parameters./cc @ryansb