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chef_base.rb
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chef_base.rb
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# -*- encoding: utf-8 -*-
#
# Author:: Fletcher Nichol (<fnichol@nichol.ca>)
#
# Copyright (C) 2013, Fletcher Nichol
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require "fileutils"
require "pathname"
require "json"
require "kitchen/provisioner/chef/berkshelf"
require "kitchen/provisioner/chef/librarian"
require "kitchen/util"
module Kitchen
module Provisioner
# Common implementation details for Chef-related provisioners.
#
# @author Fletcher Nichol <fnichol@nichol.ca>
class ChefBase < Base
default_config :require_chef_omnibus, true
default_config :chef_omnibus_url, "https://www.chef.io/chef/install.sh"
default_config :chef_omnibus_root, "/opt/chef"
default_config :chef_omnibus_install_options, nil
default_config :run_list, []
default_config :attributes, {}
default_config :log_file, nil
default_config :cookbook_files_glob, %w[
README.* metadata.{json,rb}
attributes/**/* definitions/**/* files/**/* libraries/**/*
providers/**/* recipes/**/* resources/**/* templates/**/*
].join(",")
default_config :data_path do |provisioner|
provisioner.calculate_path("data")
end
expand_path_for :data_path
default_config :data_bags_path do |provisioner|
provisioner.calculate_path("data_bags")
end
expand_path_for :data_bags_path
default_config :environments_path do |provisioner|
provisioner.calculate_path("environments")
end
expand_path_for :environments_path
default_config :nodes_path do |provisioner|
provisioner.calculate_path("nodes")
end
expand_path_for :nodes_path
default_config :roles_path do |provisioner|
provisioner.calculate_path("roles")
end
expand_path_for :roles_path
default_config :clients_path do |provisioner|
provisioner.calculate_path("clients")
end
expand_path_for :clients_path
default_config :encrypted_data_bag_secret_key_path do |provisioner|
provisioner.calculate_path("encrypted_data_bag_secret_key", :type => :file)
end
expand_path_for :encrypted_data_bag_secret_key_path
# (see Base#install_command)
def install_command
return unless config[:require_chef_omnibus]
lines = [Util.shell_helpers, chef_shell_helpers, chef_install_function]
Util.wrap_command(lines.join("\n"))
end
# (see Base#init_command)
def init_command
dirs = %w[cookbooks data data_bags environments roles clients].
map { |dir| File.join(config[:root_path], dir) }.join(" ")
lines = ["#{sudo("rm")} -rf #{dirs}", "mkdir -p #{config[:root_path]}"]
Util.wrap_command(lines.join("\n"))
end
# (see Base#create_sandbox)
def create_sandbox
super
prepare_json
prepare_cache
prepare_cookbooks
prepare(:data)
prepare(:data_bags)
prepare(:environments)
prepare(:nodes)
prepare(:roles)
prepare(:clients)
prepare(
:secret,
:type => :file,
:dest_name => "encrypted_data_bag_secret",
:key_name => :encrypted_data_bag_secret_key_path
)
end
private
# Load cookbook dependency resolver code, if required.
#
# (see Base#load_needed_dependencies!)
def load_needed_dependencies!
if File.exist?(berksfile)
debug("Berksfile found at #{berksfile}, loading Berkshelf")
Chef::Berkshelf.load!(logger)
elsif File.exist?(cheffile)
debug("Cheffile found at #{cheffile}, loading Librarian-Chef")
Chef::Librarian.load!(logger)
end
end
# Returns shell code with chef-related functions.
#
# @return [String] shell code
# @api private
def chef_shell_helpers
IO.read(File.join(
File.dirname(__FILE__), %w[.. .. .. support chef_helpers.sh]
))
end
# Generates the shell code to conditionally install a Chef Omnibus
# package onto an instance.
#
# @return [String] shell code
# @api private
def chef_install_function
version = config[:require_chef_omnibus].to_s.downcase
pretty_version = case version
when "true" then "install only if missing"
when "latest" then "always install latest version"
else version
end
install_flags = %w[latest true].include?(version) ? "" : "-v #{version}"
if config[:chef_omnibus_install_options]
install_flags += config[:chef_omnibus_install_options]
end
<<-INSTALL.gsub(/^ {10}/, "")
if should_update_chef "#{config[:chef_omnibus_root]}" "#{version}" ; then
echo "-----> Installing Chef Omnibus (#{pretty_version})"
do_download #{config[:chef_omnibus_url]} /tmp/install.sh
#{sudo("sh")} /tmp/install.sh #{install_flags}
else
echo "-----> Chef Omnibus installation detected (#{pretty_version})"
fi
INSTALL
end
# Generates a rendered client.rb/solo.rb/knife.rb formatted file as a
# String.
#
# @param data [Hash] a key/value pair hash of configuration
# @return [String] a rendered Chef config file as a String
# @api private
def format_config_file(data)
data.each.map { |attr, value|
[attr, value.inspect].join(" ")
}.join("\n")
end
# Generates a Hash with default values for a solo.rb or client.rb Chef
# configuration file.
#
# @return [Hash] a configuration hash
# @api private
def default_config_rb
root = config[:root_path]
{
:node_name => instance.name,
:checksum_path => "#{root}/checksums",
:file_cache_path => "#{root}/cache",
:file_backup_path => "#{root}/backup",
:cookbook_path => ["#{root}/cookbooks", "#{root}/site-cookbooks"],
:data_bag_path => "#{root}/data_bags",
:environment_path => "#{root}/environments",
:node_path => "#{root}/nodes",
:role_path => "#{root}/roles",
:client_path => "#{root}/clients",
:user_path => "#{root}/users",
:validation_key => "#{root}/validation.pem",
:client_key => "#{root}/client.pem",
:chef_server_url => "http://127.0.0.1:8889",
:encrypted_data_bag_secret => "#{root}/encrypted_data_bag_secret"
}
end
# Prepares a generic Chef component source directory or file for
# inclusion in the sandbox path. These components might includes nodes,
# roles, etc.
#
# @param component [Symbol,String] a component name such as `:node`
# @param opts [Hash] optional configuration
# @option opts [Symbol] :type whether the component is a directory or
# file (default: `:directory`)
# @option opts [Symbol] :key_name the key name in the config hash from
# which to pull the source path (default: `"#{component}_path"`)
# @option opts [String] :dest_name the destination file or directory
# basename in the sandbox path (default: `component.to_s`)
# @api private
def prepare(component, opts = {})
opts = { :type => :directory }.merge(opts)
key_name = opts.fetch(:key_name, "#{component}_path")
src = config[key_name.to_sym]
return if src.nil?
info("Preparing #{component}")
debug("Using #{component} from #{src}")
dest = File.join(sandbox_path, opts.fetch(:dest_name, component.to_s))
case opts[:type]
when :directory
FileUtils.mkdir_p(dest)
FileUtils.cp_r(Dir.glob("#{src}/*"), dest)
when :file
FileUtils.mkdir_p(File.dirname(dest))
FileUtils.cp_r(src, dest)
end
end
# Prepares a Chef JSON file, sometimes called a dna.json or
# first-boot.json, for inclusion in the sandbox path.
#
# @api private
def prepare_json
dna = config[:attributes].merge(:run_list => config[:run_list])
info("Preparing dna.json")
debug("Creating dna.json from #{dna.inspect}")
File.open(File.join(sandbox_path, "dna.json"), "wb") do |file|
file.write(dna.to_json)
end
end
# Prepares a cache directory for inclusion in the sandbox path.
#
# @api private
def prepare_cache
FileUtils.mkdir_p(File.join(sandbox_path, "cache"))
end
# Prepares Chef cookbooks for inclusion in the sandbox path.
#
# @api private
def prepare_cookbooks
if File.exist?(berksfile)
resolve_with_berkshelf
elsif File.exist?(cheffile)
resolve_with_librarian
cp_site_cookbooks if File.directory?(site_cookbooks_dir)
elsif File.directory?(cookbooks_dir)
cp_cookbooks
elsif File.exist?(metadata_rb)
cp_this_cookbook
else
make_fake_cookbook
end
filter_only_cookbook_files
end
# Removes all non-cookbook files in the sandbox path.
#
# @api private
def filter_only_cookbook_files
info("Removing non-cookbook files before transfer")
FileUtils.rm(all_files_in_cookbooks - only_cookbook_files)
end
# Generates a list of all files in the cookbooks directory in the
# sandbox path.
#
# @return [Array<String>] an array of absolute paths to files
# @api private
def all_files_in_cookbooks
Dir.glob(File.join(tmpbooks_dir, "**/*"), File::FNM_DOTMATCH).
select { |fn| File.file?(fn) && ! %w[. ..].include?(fn) }
end
# Generates a list of all typical cookbook files needed in a Chef run,
# located in the cookbooks directory in the sandbox path.
#
# @return [Array<String>] an array of absolute paths to files
# @api private
def only_cookbook_files
glob = File.join(tmpbooks_dir, "*", "{#{config[:cookbook_files_glob]}}")
Dir.glob(glob, File::FNM_DOTMATCH).
select { |fn| File.file?(fn) && ! %w[. ..].include?(fn) }
end
# @return [String] an absolute path to a Berksfile, relative to the
# kitchen root
# @api private
def berksfile
File.join(config[:kitchen_root], "Berksfile")
end
# @return [String] an absolute path to a Cheffile, relative to the
# kitchen root
# @api private
def cheffile
File.join(config[:kitchen_root], "Cheffile")
end
# @return [String] an absolute path to a metadata.rb, relative to the
# kitchen root
# @api private
def metadata_rb
File.join(config[:kitchen_root], "metadata.rb")
end
# @return [String] an absolute path to a cookbooks/ directory, relative
# to the kitchen root
# @api private
def cookbooks_dir
File.join(config[:kitchen_root], "cookbooks")
end
# @return [String] an absolute path to a site-cookbooks/ directory,
# relative to the kitchen root
# @api private
def site_cookbooks_dir
File.join(config[:kitchen_root], "site-cookbooks")
end
# @return [String] an absolute path to a cookbooks/ directory in the
# sandbox path
# @api private
def tmpbooks_dir
File.join(sandbox_path, "cookbooks")
end
# @return [String] an absolute path to a site cookbooks directory in the
# sandbox path
# @api private
def tmpsitebooks_dir
File.join(sandbox_path, "cookbooks")
end
# Copies a cookbooks/ directory into the sandbox path.
def cp_cookbooks
info("Preparing cookbooks from project directory")
debug("Using cookbooks from #{cookbooks_dir}")
FileUtils.mkdir_p(tmpbooks_dir)
FileUtils.cp_r(File.join(cookbooks_dir, "."), tmpbooks_dir)
cp_site_cookbooks if File.directory?(site_cookbooks_dir)
cp_this_cookbook if File.exist?(metadata_rb)
end
# Copies a site-cookbooks/ directory into the sandbox path.
#
# @api private
def cp_site_cookbooks
info("Preparing site-cookbooks from project directory")
debug("Using cookbooks from #{site_cookbooks_dir}")
FileUtils.mkdir_p(tmpsitebooks_dir)
FileUtils.cp_r(File.join(site_cookbooks_dir, "."), tmpsitebooks_dir)
end
# Copies the current project, assumed to be a Chef cookbook into the
# sandbox path.
#
# @api private
def cp_this_cookbook
info("Preparing current project directory as a cookbook")
debug("Using metadata.rb from #{metadata_rb}")
cb_name = MetadataChopper.extract(metadata_rb).first || raise(UserError,
"The metadata.rb does not define the 'name' key." \
" Please add: `name '<cookbook_name>'` to metadata.rb and retry")
cb_path = File.join(tmpbooks_dir, cb_name)
glob = Dir.glob("#{config[:kitchen_root]}/**")
FileUtils.mkdir_p(cb_path)
FileUtils.cp_r(glob, cb_path)
end
# Creates a minimal, no-op cookbook in the sandbox path.
#
# @api private
def make_fake_cookbook
info("Berksfile, Cheffile, cookbooks/, or metadata.rb not found " \
"so Chef will run with effectively no cookbooks. Is this intended?")
name = File.basename(config[:kitchen_root])
fake_cb = File.join(tmpbooks_dir, name)
FileUtils.mkdir_p(fake_cb)
File.open(File.join(fake_cb, "metadata.rb"), "wb") do |file|
file.write(%{name "#{name}"\n})
end
end
# Performs a Berkshelf cookbook resolution inside a common mutex.
#
# @api private
def resolve_with_berkshelf
Kitchen.mutex.synchronize do
Chef::Berkshelf.new(berksfile, tmpbooks_dir, logger).resolve
end
end
# Performs a Librarin-Chef cookbook resolution inside a common mutex.
#
# @api private
def resolve_with_librarian
Kitchen.mutex.synchronize do
Chef::Librarian.new(cheffile, tmpbooks_dir, logger).resolve
end
end
end
end
end