Question:
How can I pass yaml array to --extra-vars in Ansible playbook. Ansible documentation does not declares its syntax nor I can find that on any internet resource.
I mean if I have a playbook:
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--- - hosts: {{hostName}} - remote_user: admin ... |
Then I should call my playbook like
ansible-playbook DeployWar.yml --extra-vars="hostName=tomcat-webApp"
But I want to run this playbook on two servers say tomcat-webApp and tomcat-all, and I want to control it from out side i.e. using --extra-vars. What I have tried to do is:
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ansible-playbook DeployWar.yml --extra-vars="hostName=[tomcat-webApp, tomcat-all]" ansible-playbook DeployWar.yml --extra-vars="hostName={tomcat-webApp, tomcat-all}" ansible-playbook DeployWar.yml --extra-vars="[{hostName: tomcat-webApp}, {hostName: tomcat-all}]" |
But in all cases playbook fails declaring a syntax error in my call.
Any help appreciated.
Answer:
To answer your first question “How can I pass yaml array to –extra-vars in Ansible playbook.”
you can pass in a json formatted string to extra-vars.
Here is an example play:
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- hosts: all gather_facts: no tasks: - debug: var=test_list |
And how to pass in test_list to ansible-playbook:
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ansible-playbook -c local -i localhost, test.yml --extra-vars='{"test_list": [1,2,3]}' |
Though you can use a variable for hosts I recommend checking out Ansible’s mechanism for host management which is inventory in conjunction with the --limit option.