[CentOS-devel] [opstools] How to support fluentd with ruby24?

On 12/18/2017 04:04 PM, Rich Megginson wrote:
> On 12/18/2017 02:23 AM, Matthias Runge wrote:
>> On 16/12/17 05:51, Rich Megginson wrote:
>>
>>>> So a fluentd-ruby24-scl package, a fluent-plugin-add-ruby24-scl
>>>> package, etc. etc.?  That's going to be a non-starter.
>>> It is the only way.  You cannot run ruby24 and load packages built for
>>> ruby 2.0 - running fluentd on a system which has rh-ruby24 installed:
>>>
>>> + exec /opt/rh/rh-ruby24/root/usr/bin/ruby /usr/bin/fluentd
>>> --no-supervisor -vv
>>> /opt/rh/rh-ruby24/root/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in 
>>>
>>> `require': incompatible library version -
>>> /usr/share/gems/gems/yajl-ruby-1.3.1/lib/yajl/yajl.so (LoadError)
>>>          from
>>> /opt/rh/rh-ruby24/root/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in 
>>>
>>> `require'
>>>          from /usr/share/gems/gems/yajl-ruby-1.3.1/lib/yajl.rb:1:in 
>>> `<top
>>> (required)>'
>>>
>>> The gems in /usr/share/gems are installed via RPM and built with 
>>> ruby 2.0.
>>>
>>> It might be possible to perform this conversion at runtime:
>>>
>>> - install fluentd from regular ruby 2.0 rpms normally
>>> - for each gem in /usr/share/gems
>>>    rebuild using ruby24 into /opt/rh/rh-ruby24/root/usr/share
>>>
>>> but this is just piling hacks on top of more hacks
>>>
>>> I think we're going to need ruby24 branches for all of our common,
>>> collectd, and fluentd packages, and we're going to need some sort of
>>> mass conversion of all of those specs so that we can use them both with
>>> and without scl.
>>>
>> We could also go that route and build ruby 2.4 in opstools (+ rebuilding
>> all ruby-packages).
>>
>> Not sure if we really want to do that.
>
> I don't really want to do that.
>
> I think the best course of action is to convert the spec files so that 
> they can work both with and without SCL (there are instructions on the 
> SCL package page, and lots of rpm macros to use), then have ruby 2.0 
> and ruby24 scl versions of all of our packages.  There may even be 
> scripts which can convert spec files to be SCL-ized.
>

We will also need a version of gem2rpm that can generate the correct 
SCL-ized spec file.

> I wonder if we can add ruby24 as a "platform" e.g. have a single spec 
> file, and build e.g. fluentd-1.0.el7.x86_64.rpm and 
> fluentd-1.0.el7ruby24.x86_64.rpm ?
>
>>
>> Matthias
>
>
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