Chef Amazon Linux Boostrap File for Ruby 1.9.3 on AmazonLinux 2012.03

amazon-linux-gems-19.erb

bash -c '
<%= "export http_proxy=\"#{knife_config[:bootstrap_proxy]}\"" if knife_config[:bootstrap_proxy] -%>

if [ ! -f /usr/bin/chef-client ]; then
  yum groupinstall -y 'Development tools'
  yum install -y libxml2-devel libxslt-devel
  yum install -y ruby19 ruby19-devel rubygems19 rubygem19-rdoc rubygem19-rake rubygem19-bigdecimal
  ln -sf /usr/bin/ruby1.9 /usr/bin/ruby
  ln -sf /usr/bin/gem1.9 /usr/bin/gem
  ln -sf /usr/bin/irb1.9 /usr/bin/irb
  ln -sf /usr/bin/rdoc1.9 /usr/bin/rdoc
  ln -sf /usr/bin/rake1.9 /usr/bin/rake
fi

gem1.9 update --system
gem1.9 install bigdecimal
gem1.9 install rdoc
gem1.9 install rake
gem1.9 install yaml --no-rdoc --no-ri --verbose
gem1.9 install ohai --no-rdoc --no-ri -v 0.6.10 --verbose
gem1.9 install chef --no-rdoc --no-ri -v 0.10.8 --verbose
gem1.9 install multi_json -v '1.0.3' --no-rdoc --no-ri --verbose
gem1.9 install aws-sdk --no-rdoc --no-ri --verbose
gem1.9 install fog --no-rdoc --no-ri --verbose

mkdir -p /etc/chef

(
cat <<'EOP'
<%= validation_key %>
EOP
) > /tmp/validation.pem
awk NF /tmp/validation.pem > /etc/chef/validation.pem
rm /tmp/validation.pem

(
cat <<'EOP'
<%= config_content %>
EOP
) > /etc/chef/client.rb

(
cat <<'EOP'
<%= { "run_list" => @run_list }.to_json %>
EOP
) > /etc/chef/first-boot.json

<%= start_chef %>'

amazon_linux_ruby_update.sh

#!/usr/bin/env bash
# Perform an in place upgrade of Ruby from 1.8.7 to 1.9.3 on Amazon Linux 2012.03.
#   Based on 
#     http://tickets.opscode.com/browse/CHEF-3011
#     https://forums.aws.amazon.com/thread.jspa?messageID=333661

# Update the system
sudo yum clean all
sudo yum update -y

# Update our development tools and ruby install
sudo yum groupinstall -y 'Development tools'
sudo yum install -y libxml2-devel libxslt-devel
sudo yum install -y ruby19 ruby19-devel rubygems19 rubygem19-rdoc rubygem19-rake rubygem19-bigdecimal

# Link R19 in place of R18:
sudo ln -sf /usr/bin/ruby1.9 /usr/bin/ruby
sudo ln -sf /usr/bin/gem1.9 /usr/bin/gem
sudo ln -sf /usr/bin/irb1.9 /usr/bin/irb
sudo ln -sf /usr/bin/rdoc1.9 /usr/bin/rdoc
sudo ln -sf /usr/bin/rake1.9 /usr/bin/rake

# Update our gems. We are being a little paranoid and using gem1.9 directly.
sudo gem1.9 update --system
sudo gem1.9 install bigdecimal
sudo gem1.9 install rdoc
sudo gem1.9 install rake
sudo gem1.9 install yaml --no-rdoc --no-ri --verbose
sudo gem1.9 install ohai --no-rdoc --no-ri -v 0.6.10 --verbose
sudo gem1.9 install chef --no-rdoc --no-ri -v 0.10.8 --verbose
sudo gem1.9 install multi_json -v '1.0.3' --no-rdoc --no-ri --verbose
sudo gem1.9 install aws-sdk --no-rdoc --no-ri --verbose
sudo gem1.9 install fog --no-rdoc --no-ri --verbose

# Converge the node
sudo chef-client
sudo service chef-client stop
sudo service chef-client start

You might want yum groupinstall 'Development Tools' instead of yum install automake autoconf make libxslt-devel ...

Good suggestions. I also went paranoid and used gem1.9 vs. just calling gem. Do note that the yum group 'Development tools' does not include the libraries and that the 'Development Libraries' group does not include libxslt-devel.

One downside of the group install is that it is bringing in things that are not exactly necessary (like rpm package checking).

Ok, that was stupid of me. Didn't need to 'sudo' in the bootstrap file....