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Deaton
Asked: 2019-11-15 02:02:50 +0800 CST

Ansible Centos 8 dnf module "module" switch missing?

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I'm trying to use the dnf module of Ansible with the module switch to install PHP 7.4 from the remi repo.

I'm doing this as a command, as I can't get it to work using Ansible dnf.

This is what I want to do: dnf module -y install php:remi-7.4

I can't work out if I can use the module switch on the Ansible dnf module. Does anyone know if that's possible?

Thanks,

David

Thanks for replying. I don't have a problem using the dnf module in Ansible, I have a problem with using the parameter module using Ansible dnf.

I'm doing this:

- name: install php from stream {{ php_module_stream }}
  command: dnf module -y install {{ php_module_stream }}

and I want to do something like this:

- name: install php from stream {{ php_module_stream }}
  dnf:
    name: {{ php_module_stream }}
    module: true

I can't work out how to use the word module in dnf.

ansible

2 Answers

  1. Best Answer

    You can install a module (which is essentially a group of packages) by adding a @ prior to the name of the module to the name parameter of the Ansible dnf module. It can be used like this:

    - name: install the 'Development tools' package group
  dnf:
    name: '@Development tools'
    state: present
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  2. Semantics warning: Ansible uses the term "Module" to describe a specific command set or functionality. DNF/Yum4 uses the term "module" to describe groups of packages, features, and software vendors. These can easily confuse things in this question.

    Per the official documentation for Ansible 2.9, there is no (documented) support for the DNF/Yum4 "modules" capabilities.

    If you specifically need to use the 'modules' switch with DNF/Yum4, you can do so using the ansible command or shell modules, depending on how you use it. Some example code:

    - name: Use dnf command to install postgresql 9.6 client
  command: dnf module install postgresql:9.6/client

    This task will enable the postgreql module, 9.6 stream, and install the packages tagged as part of the 'client' profile.

    Alternatively, you could try the following notation with the dnf module in Ansible; I have not tested it and cannot say if it will work or if Ansible can properly interpret the special characters.

    - name: Use the ansible dnf_module to install postgresql 9.6 client
  dnf:
    name: '@postgresql:9.6/client'
    state: present

    According to RHEL8 documentation, yum4/dns accepts this notation without explicitly calling the "module" switch. (Example near the bottom of section 4.6)

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