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

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.

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