puppet-anchor-pattern-vs-containment

# Anchor
# /etc/puppetlabs/puppet/modules/profiles/manifests/dbserver.pp
class profiles::dbserver {
  anchor{'before_mysql:'} -> class{'mysql':} -> anchor{'after_mysql':}
}

# /etc/puppetlabs/puppet/modules/profiles/manifests/webserver.pp
class profiles::webserver {
  anchor{'before_apache:'} -> class{'apache':} -> anchor{'after_apache':}
}

# /etc/puppetlabs/puppet/modules/roles/webstack.pp
class roles::ecommerce_app {
  include profiles::dbserver
  include profiles::webserver
  Class['profiles::dbserver'] -> Class['profiles::webserver']
}

#/etc/puppetpabs/puppet/manifests/site.pp
node 'webapp01.puppetlabs.com' {
  include roles::ecommerce_app
}

# Containment
# /etc/puppetlabs/puppet/modules/profiles/manifests/dbserver.pp
class profiles::dbserver {
  contain mysql
}

# /etc/puppetlabs/puppet/modules/profiles/manifests/webserver.pp
class profiles::webserver {
  contain apache
}

# /etc/puppetlabs/puppet/modules/roles/webstack.pp
class roles::ecommerce_app {
  include profiles::dbserver
  include profiles::webserver
  Class['profiles::dbserver'] -> Class['profiles::webserver']
}

#/etc/puppetpabs/puppet/manifests/site.pp
node 'webapp01.puppetlabs.com' {
  include roles::ecommerce_app
}