Check if a list contains an item in Ansible

Question

I m trying to check if the version supplied is a valid supported version  I ve set the list of acceptable versions in a variable  and I want to fail out of the task if the supplied version is not in the list  However  I m unsure of how to do that     role vars main yml ---   acceptable versions   2  3  4    and    role tasks main yml ---   - fail         msg   unsupported version        with items     acceptable versions          when     item        version       - name  continue with rest of tasks      Above is sort of what I want to do  but I haven t been able to figure out if there s a one line way to construct a  list contains  call for the fail module

User · Accepted Answer

You do not need      in when conditions  What you are searching for is   - fail  msg  unsupported version    when  version not in acceptable versions

User · Answer

Ansible has a version compare filter since 1 6  You can do something like below in when conditional   when  ansible distribution version   version compare  12 04     gt      This will give you support for major  amp  minor versions comparisons and you can compare versions using operators like    lt   lt   lt    le   gt   gt   gt    ge         eq       lt  gt   ne  You can find more information about this here  Ansible - Version comparison filters  Otherwise if you have really simple case you can use what  ProfHase85 suggested

[yaml] Check if a list contains an item in Ansible

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