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The Ruby Gems package provider attempts to use the Ruby Gems API to install gems without spawning a new process, whenever possible.
A gems command to install will be spawned under the following conditions: resource, it is preferable to provide the install options as a hash.
Fetching version metadata from https://rubygems.org/. Bundler 1.14 introduced a new flag that allows you to not update any shared dependencies, it’s called Fetching gem metadata from https://rubygems.org/............... Using daemons 1.2.4 Using eventmachine 1.2.3 Using rack 1.6.5 Using bundler 1.14.6 Using rack-protection 1.5.3 Using thin 1.7.0 As you can see it only updated thin and left rack alone.
Fetching version metadata from https://rubygems.org/. That means there is no risk of it unexpectedly breaking any of your other dependencies relying on rack.
This approach allows the provider to install the gem without needing to spawn an external gem process.
The following Ruby Gems options are available for inclusion within a hash and are passed to the Ruby Gems Dependency Installer: , the chef-client is forced to spawn a gems process to install the gems (which uses more system resources) when options are passed as a string.
This does mean some gems may be upgraded to unexpected versions.
Let’s take a look at this minimal Gemfile: Fetching gem metadata from https://rubygems.org/............... Using daemons 1.2.4 Using eventmachine 1.2.3 Using rack 2.0.1 Which might be surprising to you since you asked it to update thin, not rack and both top-level gems would be satisfied with the older version of rack (so it doesn’t need to update rack to satisfy the dependency graph).When this resource is notified, this resource block is either run immediately or it is queued up to be run at the end of the chef-client run.Where a resource represents a piece of the system (and its desired state), a provider defines the steps that are needed to bring that piece of the system from its current state into the desired state.One is the standard, system-wide instance of Ruby and the other is a dedicated instance that is available only to the chef-client.Use the chef_gem resource to install gems into the instance of Ruby that is dedicated to the chef-client.