[CentOS] yum install <olderversion> does not downgrade

Sat Jun 3 11:44:18 UTC 2017
James Hogarth <james.hogarth at gmail.com>

On 2 Jun 2017 1:28 pm, "Mark Haney" <mark.haney at neonova.net> wrote:

Personally, I would do one of three things:

1. Use the -m command to run 'yum install <version>' which /might/ work.

2. Uninstall the newer package and install the version you want. (Check the
'state' directive to do this.)

3. Pin that package version when creating the server/VM so as not to be

#3 is useful to us as we kickstart all our servers and VMs, and this
eliminates the problem going forward.  Then, when we're ready to upgrade
the pinned package, we have an ansible playbook that unpins that version,
installs the new version (even if not latest), then re-pins.


On 06/01/2017 03:46 PM, Anand Buddhdev wrote:

> We're using ansible to configure our CentOS 6 servers, and we have a
> task to install a specific version of a package:
> - name: install thrift2
>    yum: name=ripencc-thrift2-{{ version }}
> In this ansible task, the "version" variable is set by the operator.
> When we want to upgrade, it works. But today we had to downgrade, and
> noticed that ansible wasn't downgrading it. So we tried by hand (the
> installed version was 1.0.8):
> # yum install ripencc-thrift2-1.0.3
> I don't have the output handy, because a colleague was working on it,
> but basically, yum said something like "package already installed" and
> refused to downgrade it, even though the package is in our repository.
> I have a strong sense that yum _used to_ downgrade packages if asked to
> install an older version, but perhaps I am misremembering.
> Nevertheless, I want to ask: is this a bug in yum? If asked to install a
> specific version, should it not upgrade OR downgrade as needed?
> Regards,
> Anand
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> CentOS at centos.org
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The present version of ansible can't handle downgrades with the yum module

There's been a few discussions of this over time but this is the most
recent I think, and it looks like it might get fixed on 2.4 perhaps


If you want to do a specific version you are better off not using the yum
module at present but rather shell/command to do so instead.