Can't install a gem on CentOS 8 - ruby

Question

Use root user installed rubygems.
# yum install rubygems -y
When check ruby's version, got
# ruby -v
ruby 2.5.9p229 (2021-04-05 revision 67939) [x86_64-linux]
Gem's version:
# gem -v
2.7.6.3
When install a gem, got
# gem install fluent-plugin-kinesis
Building native extensions. This could take a while...
ERROR: Error installing fluent-plugin-kinesis:
ERROR: Failed to build gem native extension.
current directory: /usr/local/share/gems/gems/msgpack-1.4.2/ext/msgpack
/usr/bin/ruby -r ./siteconf20210825-20925-17fyw57.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/share/include/ruby.h
extconf failed, exit code 1
Gem files will remain installed in /usr/local/share/gems/gems/msgpack-1.4.2 for inspection.
Results logged to /usr/local/lib64/gems/ruby/msgpack-1.4.2/gem_make.out
Should I install a high version ruby? It's the default one on the system.
update
I installed ruby-devel
# yum install ruby-devel.x86_64
Run install fluent-plugin-kinesis gem again
# gem install fluent-plugin-kinesis
Building native extensions. This could take a while...
ERROR: Error installing fluent-plugin-kinesis:
ERROR: Failed to build gem native extension.
current directory: /usr/local/share/gems/gems/msgpack-1.4.2/ext/msgpack
/usr/bin/ruby -r ./siteconf20210826-11878-18i9eps.rb extconf.rb
checking for ruby/st.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib64
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/usr/bin/$(RUBY_BASE_NAME)
/usr/share/ruby/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /usr/share/ruby/mkmf.rb:590:in `try_cpp'
from /usr/share/ruby/mkmf.rb:1098:in `block in have_header'
from /usr/share/ruby/mkmf.rb:948:in `block in checking_for'
from /usr/share/ruby/mkmf.rb:350:in `block (2 levels) in postpone'
from /usr/share/ruby/mkmf.rb:320:in `open'
from /usr/share/ruby/mkmf.rb:350:in `block in postpone'
from /usr/share/ruby/mkmf.rb:320:in `open'
from /usr/share/ruby/mkmf.rb:346:in `postpone'
from /usr/share/ruby/mkmf.rb:947:in `checking_for'
from /usr/share/ruby/mkmf.rb:1097:in `have_header'
from extconf.rb:3:in `<main>'
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/usr/local/lib64/gems/ruby/msgpack-1.4.2/mkmf.log
extconf failed, exit code 1
Gem files will remain installed in /usr/local/share/gems/gems/msgpack-1.4.2 for inspection.
Results logged to /usr/local/lib64/gems/ruby/msgpack-1.4.2/gem_make.out
For other gems works well.

Answer 1

Take a look at the docs or this answer.
Install Ruby >= 2.4 on your local environment. In addition, install ruby-dev package via Package Manager to build native extension gems.
I believe in CentOS ruby-dev equivalent is ruby-devel. You can confirm it by running yum search ruby-dev
You'll find 2 packages, one i686 and another x86_64. You can find which one you need by running lscpu | grep Arch.
Then simply download the package, and rerun gem install