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|
#
# Author:: Adam Jacob (<adam@opscode.com>)
# Author:: Christopher Brown (<cb@opscode.com>)
# Author:: Christopher Walters (<cw@opscode.com>)
# Author:: Tim Hinderliter (<tim@opscode.com>)
# Copyright:: Copyright (c) 2008-2011 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# 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 'forwardable'
require 'chef/config'
require 'chef/cookbook/cookbook_collection'
require 'chef/nil_argument'
require 'chef/mixin/check_helper'
require 'chef/mixin/params_validate'
require 'chef/mixin/from_file'
require 'chef/mixin/language_include_attribute'
require 'chef/mixin/deep_merge'
require 'chef/environment'
require 'chef/couchdb'
require 'chef/rest'
require 'chef/run_list'
require 'chef/node/attribute'
require 'chef/index_queue'
require 'chef/mash'
require 'chef/json_compat'
require 'chef/search/query'
class Chef
class Node
extend Forwardable
def_delegators :construct_attributes, :keys, :each_key, :each_value, :key?, :has_key?
attr_accessor :recipe_list, :couchdb, :couchdb_rev, :run_state, :run_list
attr_accessor :override_attrs, :default_attrs, :normal_attrs, :automatic_attrs
attr_reader :couchdb_id
# TODO: 5/18/2010 cw/timh. cookbook_collection should be removed
# from here and for any place it's needed, it should be accessed
# through a Chef::RunContext
attr_accessor :cookbook_collection
include Chef::Mixin::CheckHelper
include Chef::Mixin::FromFile
include Chef::Mixin::ParamsValidate
include Chef::Mixin::LanguageIncludeAttribute
include Chef::IndexQueue::Indexable
DESIGN_DOCUMENT = {
"version" => 11,
"language" => "javascript",
"views" => {
"all" => {
"map" => <<-EOJS
function(doc) {
if (doc.chef_type == "node") {
emit(doc.name, doc);
}
}
EOJS
},
"all_id" => {
"map" => <<-EOJS
function(doc) {
if (doc.chef_type == "node") {
emit(doc.name, doc.name);
}
}
EOJS
},
"status" => {
"map" => <<-EOJS
function(doc) {
if (doc.chef_type == "node") {
var to_emit = { "name": doc.name, "chef_environment": doc.chef_environment };
if (doc["attributes"]["fqdn"]) {
to_emit["fqdn"] = doc["attributes"]["fqdn"];
} else {
to_emit["fqdn"] = "Undefined";
}
if (doc["attributes"]["ipaddress"]) {
to_emit["ipaddress"] = doc["attributes"]["ipaddress"];
} else {
to_emit["ipaddress"] = "Undefined";
}
if (doc["attributes"]["ohai_time"]) {
to_emit["ohai_time"] = doc["attributes"]["ohai_time"];
} else {
to_emit["ohai_time"] = "Undefined";
}
if (doc["attributes"]["uptime"]) {
to_emit["uptime"] = doc["attributes"]["uptime"];
} else {
to_emit["uptime"] = "Undefined";
}
if (doc["attributes"]["platform"]) {
to_emit["platform"] = doc["attributes"]["platform"];
} else {
to_emit["platform"] = "Undefined";
}
if (doc["attributes"]["platform_version"]) {
to_emit["platform_version"] = doc["attributes"]["platform_version"];
} else {
to_emit["platform_version"] = "Undefined";
}
if (doc["run_list"]) {
to_emit["run_list"] = doc["run_list"];
} else {
to_emit["run_list"] = "Undefined";
}
emit(doc.name, to_emit);
}
}
EOJS
},
"by_run_list" => {
"map" => <<-EOJS
function(doc) {
if (doc.chef_type == "node") {
if (doc['run_list']) {
for (var i=0; i < doc.run_list.length; i++) {
emit(doc['run_list'][i], doc.name);
}
}
}
}
EOJS
},
"by_environment" => {
"map" => <<-EOJS
function(doc) {
if (doc.chef_type == "node") {
var env = (doc['chef_environment'] == null ? "_default" : doc['chef_environment']);
emit(env, doc.name);
}
}
EOJS
}
},
}
# Create a new Chef::Node object.
def initialize(couchdb=nil)
@name = nil
@chef_environment = '_default'
@normal_attrs = Mash.new
@override_attrs = Mash.new
@default_attrs = Mash.new
@automatic_attrs = Mash.new
@run_list = Chef::RunList.new
@couchdb_rev = nil
@couchdb_id = nil
@couchdb = couchdb || Chef::CouchDB.new
@run_state = {
:template_cache => Hash.new,
:seen_recipes => Hash.new,
:seen_attributes => Hash.new
}
# TODO: 5/20/2010 need this here as long as other objects try to access
# the cookbook collection via Node, otherwise get NoMethodError on nil.
@cookbook_collection = CookbookCollection.new
end
def couchdb_id=(value)
@couchdb_id = value
@index_id = value
end
# Used by DSL
def node
self
end
def chef_server_rest
Chef::REST.new(Chef::Config[:chef_server_url])
end
# Find a recipe for this Chef::Node by fqdn. Will search first for
# Chef::Config["node_path"]/fqdn.rb, then hostname.rb, then default.rb.
#
# Returns a new Chef::Node object.
#
# Raises an ArgumentError if it cannot find the node.
def find_file(fqdn)
host_parts = fqdn.split(".")
hostname = host_parts[0]
[fqdn, hostname, "default"].each { |fname|
node_file = File.join(Chef::Config[:node_path], "#{fname.to_s}.rb")
return self.from_file(node_file) if File.exists?(node_file)
}
raise ArgumentError, "Cannot find a node matching #{fqdn}, not even with default.rb!"
end
# Set the name of this Node, or return the current name.
def name(arg=nil)
if arg != nil
validate(
{:name => arg },
{:name => { :kind_of => String,
:cannot_be => :blank,
:regex => /^[\-[:alnum:]_:.]+$/}
})
@name = arg
else
@name
end
end
def chef_environment(arg=nil)
set_or_return(
:chef_environment,
arg,
{ :regex => /^[\-[:alnum:]_]+$/, :kind_of => String }
)
end
# Used by the DSL
def attribute
construct_attributes
end
def construct_attributes
Chef::Node::Attribute.new(normal_attrs, default_attrs, override_attrs, automatic_attrs)
end
def attribute=(value)
self.normal_attrs = value
end
# Return an attribute of this node. Returns nil if the attribute is not found.
def [](attrib)
construct_attributes[attrib]
end
# Set an attribute of this node
def []=(attrib, value)
construct_attributes[attrib] = value
end
def store(attrib, value)
self[attrib] = value
end
# Set a normal attribute of this node, but auto-vivifiy any Mashes that
# might be missing
def normal
attrs = construct_attributes
attrs.set_type = :normal
attrs.auto_vivifiy_on_read = true
attrs
end
alias_method :set, :normal
# Set a normal attribute of this node, auto-vivifiying any mashes that are
# missing, but if the final value already exists, don't set it
def normal_unless
attrs = construct_attributes
attrs.set_type = :normal
attrs.auto_vivifiy_on_read = true
attrs.set_unless_value_present = true
attrs
end
alias_method :set_unless, :normal_unless
# Set a default of this node, but auto-vivifiy any Mashes that might
# be missing
def default
attrs = construct_attributes
attrs.set_type = :default
attrs.auto_vivifiy_on_read = true
attrs
end
# Set a default attribute of this node, auto-vivifiying any mashes that are
# missing, but if the final value already exists, don't set it
def default_unless
attrs = construct_attributes
attrs.set_type = :default
attrs.auto_vivifiy_on_read = true
attrs.set_unless_value_present = true
attrs
end
# Set an override attribute of this node, but auto-vivifiy any Mashes that
# might be missing
def override
attrs = construct_attributes
attrs.set_type = :override
attrs.auto_vivifiy_on_read = true
attrs
end
# Set an override attribute of this node, auto-vivifiying any mashes that
# are missing, but if the final value already exists, don't set it
def override_unless
attrs = construct_attributes
attrs.set_type = :override
attrs.auto_vivifiy_on_read = true
attrs.set_unless_value_present = true
attrs
end
# Return true if this Node has a given attribute, false if not. Takes either a symbol or
# a string.
#
# Only works on the top level. Preferred way is to use the normal [] style
# lookup and call attribute?()
def attribute?(attrib)
construct_attributes.attribute?(attrib)
end
# Yield each key of the top level to the block.
def each(&block)
construct_attributes.each(&block)
end
# Iterates over each attribute, passing the attribute and value to the block.
def each_attribute(&block)
construct_attributes.each_attribute(&block)
end
# Encouraged to only get used for lookups - while you can do sets from here, it's not as explicit
# as using the normal/default/override interface.
def method_missing(symbol, *args)
attrs = construct_attributes
attrs.send(symbol, *args)
end
# Returns true if this Node expects a given recipe, false if not.
#
# First, the run list is consulted to see whether the recipe is
# explicitly included. If it's not there, it looks in
# run_state[:seen_recipes], which is populated by include_recipe
# statements in the DSL (and thus would not be in the run list).
#
# NOTE: It's used by cookbook authors
def recipe?(recipe_name)
run_list.include?(recipe_name) || run_state[:seen_recipes].include?(recipe_name)
end
# Returns true if this Node expects a given role, false if not.
def role?(role_name)
run_list.include?("role[#{role_name}]")
end
# Returns an Array of roles and recipes, in the order they will be applied.
# If you call it with arguments, they will become the new list of roles and recipes.
def run_list(*args)
args.length > 0 ? @run_list.reset!(args) : @run_list
end
# Returns true if this Node expects a given role, false if not.
def run_list?(item)
run_list.detect { |r| r == item } ? true : false
end
# Consume data from ohai and Attributes provided as JSON on the command line.
def consume_external_attrs(ohai_data, json_cli_attrs)
Chef::Log.debug("Extracting run list from JSON attributes provided on command line")
consume_attributes(json_cli_attrs)
@automatic_attrs = ohai_data
platform, version = Chef::Platform.find_platform_and_version(self)
Chef::Log.debug("Platform is #{platform} version #{version}")
@automatic_attrs[:platform] = platform
@automatic_attrs[:platform_version] = version
end
# Consumes the combined run_list and other attributes in +attrs+
def consume_attributes(attrs)
normal_attrs_to_merge = consume_run_list(attrs)
Chef::Log.debug("Applying attributes from json file")
@normal_attrs = Chef::Mixin::DeepMerge.horizontal_merge(@normal_attrs,normal_attrs_to_merge)
self.tags # make sure they're defined
end
# Lazy initializer for tags attribute
def tags
self.set[:tags] = [] unless attribute?(:tags)
self[:tags]
end
# Extracts the run list from +attrs+ and applies it. Returns the remaining attributes
def consume_run_list(attrs)
attrs = attrs ? attrs.dup : {}
if new_run_list = attrs.delete("recipes") || attrs.delete("run_list")
if attrs.key?("recipes") || attrs.key?("run_list")
raise Chef::Exceptions::AmbiguousRunlistSpecification, "please set the node's run list using the 'run_list' attribute only."
end
Chef::Log.info("Setting the run_list to #{new_run_list.inspect} from JSON")
run_list(new_run_list)
end
attrs
end
# Clear defaults and overrides, so that any deleted attributes
# between runs are still gone.
def reset_defaults_and_overrides
@default_attrs = Mash.new
@override_attrs = Mash.new
end
# Expands the node's run list and sets the default and override
# attributes. Also applies stored attributes (from json provided
# on the command line)
#
# Returns the fully-expanded list of recipes, a RunListExpansion.
#
#--
# TODO: timh/cw, 5-14-2010: Should this method exist? Should we
# instead modify default_attrs and override_attrs whenever our
# run_list is mutated? Or perhaps do something smarter like
# on-demand generation of default_attrs and override_attrs,
# invalidated only when run_list is mutated?
def expand!(data_source = 'server')
expansion = run_list.expand(chef_environment, data_source)
raise Chef::Exceptions::MissingRole, expansion if expansion.errors?
self.tags # make sure they're defined
@automatic_attrs[:recipes] = expansion.recipes
@automatic_attrs[:roles] = expansion.roles
expansion
end
# Apply the default and overrides attributes from the expansion
# passed in, which came from roles.
def apply_expansion_attributes(expansion)
load_chef_environment_object = (chef_environment == "_default" ? nil : Chef::Environment.load(chef_environment))
environment_default_attrs = load_chef_environment_object.nil? ? {} : load_chef_environment_object.default_attributes
default_before_roles = Chef::Mixin::DeepMerge.horizontal_merge(default_attrs, environment_default_attrs)
@default_attrs = Chef::Mixin::DeepMerge.horizontal_merge(default_before_roles, expansion.default_attrs)
environment_override_attrs = load_chef_environment_object.nil? ? {} : load_chef_environment_object.override_attributes
overrides_before_environments = Chef::Mixin::DeepMerge.horizontal_merge(override_attrs, expansion.override_attrs)
@override_attrs = Chef::Mixin::DeepMerge.horizontal_merge(overrides_before_environments, environment_override_attrs)
end
# Transform the node to a Hash
def to_hash
index_hash = Hash.new
index_hash["chef_type"] = "node"
index_hash["name"] = name
index_hash["chef_environment"] = chef_environment
attribute.each do |key, value|
index_hash[key] = value
end
index_hash["recipe"] = run_list.recipe_names if run_list.recipe_names.length > 0
index_hash["role"] = run_list.role_names if run_list.role_names.length > 0
index_hash["run_list"] = run_list.run_list if run_list.run_list.length > 0
index_hash
end
def display_hash
display = {}
display["name"] = name
display["chef_environment"] = chef_environment
display["automatic"] = automatic_attrs
display["normal"] = normal_attrs
display["default"] = default_attrs
display["override"] = override_attrs
display["run_list"] = run_list.run_list
display
end
# Serialize this object as a hash
def to_json(*a)
result = {
"name" => name,
"chef_environment" => chef_environment,
'json_class' => self.class.name,
"automatic" => automatic_attrs,
"normal" => normal_attrs,
"chef_type" => "node",
"default" => default_attrs,
"override" => override_attrs,
#Render correctly for run_list items so malformed json does not result
"run_list" => run_list.run_list.map { |item| item.to_s }
}
result["_rev"] = couchdb_rev if couchdb_rev
result.to_json(*a)
end
def update_from!(o)
run_list.reset!(o.run_list)
@automatic_attrs = o.automatic_attrs
@normal_attrs = o.normal_attrs
@override_attrs = o.override_attrs
@default_attrs = o.default_attrs
chef_environment(o.chef_environment)
self
end
# Create a Chef::Node from JSON
def self.json_create(o)
node = new
node.name(o["name"])
node.chef_environment(o["chef_environment"])
if o.has_key?("attributes")
node.normal_attrs = o["attributes"]
end
node.automatic_attrs = Mash.new(o["automatic"]) if o.has_key?("automatic")
node.normal_attrs = Mash.new(o["normal"]) if o.has_key?("normal")
node.default_attrs = Mash.new(o["default"]) if o.has_key?("default")
node.override_attrs = Mash.new(o["override"]) if o.has_key?("override")
if o.has_key?("run_list")
node.run_list.reset!(o["run_list"])
else
o["recipes"].each { |r| node.recipes << r }
end
node.couchdb_rev = o["_rev"] if o.has_key?("_rev")
node.couchdb_id = o["_id"] if o.has_key?("_id")
node.index_id = node.couchdb_id
node
end
def self.cdb_list_by_environment(environment, inflate=false, couchdb=nil)
rs = (couchdb || Chef::CouchDB.new).get_view("nodes", "by_environment", :include_docs => inflate, :startkey => environment, :endkey => environment)
inflate ? rs["rows"].collect {|r| r["doc"]} : rs["rows"].collect {|r| r["value"]}
end
def self.list_by_environment(environment, inflate=false)
if inflate
response = Hash.new
Chef::Search::Query.new.search(:node, "chef_environment:#{environment}") {|n| response[n.name] = n unless n.nil?}
response
else
Chef::REST.new(Chef::Config[:chef_server_url]).get_rest("environments/#{environment}/nodes")
end
end
# List all the Chef::Node objects in the CouchDB. If inflate is set to true, you will get
# the full list of all Nodes, fully inflated.
def self.cdb_list(inflate=false, couchdb=nil)
rs =(couchdb || Chef::CouchDB.new).list("nodes", inflate)
lookup = (inflate ? "value" : "key")
rs["rows"].collect { |r| r[lookup] }
end
def self.list(inflate=false)
if inflate
response = Hash.new
Chef::Search::Query.new.search(:node) do |n|
response[n.name] = n unless n.nil?
end
response
else
Chef::REST.new(Chef::Config[:chef_server_url]).get_rest("nodes")
end
end
# Load a node by name from CouchDB
def self.cdb_load(name, couchdb=nil)
(couchdb || Chef::CouchDB.new).load("node", name)
end
def self.exists?(nodename, couchdb)
begin
self.cdb_load(nodename, couchdb)
rescue Chef::Exceptions::CouchDBNotFound
nil
end
end
def self.find_or_create(node_name)
load(node_name)
rescue Net::HTTPServerException => e
raise unless e.response.code == '404'
node = build(node_name)
node.create
end
def self.build(node_name)
node = new
node.name(node_name)
node.chef_environment(Chef::Config[:environment]) unless Chef::Config[:environment].nil? || Chef::Config[:environment].chomp.empty?
node
end
# Load a node by name
def self.load(name)
Chef::REST.new(Chef::Config[:chef_server_url]).get_rest("nodes/#{name}")
end
# Remove this node from the CouchDB
def cdb_destroy
couchdb.delete("node", name, couchdb_rev)
end
# Remove this node via the REST API
def destroy
chef_server_rest.delete_rest("nodes/#{name}")
end
# Save this node to the CouchDB
def cdb_save
@couchdb_rev = couchdb.store("node", name, self)["rev"]
end
# Save this node via the REST API
def save
# Try PUT. If the node doesn't yet exist, PUT will return 404,
# so then POST to create.
begin
if Chef::Config[:why_run]
Chef::Log.warn("In whyrun mode, so NOT performing node save.")
else
chef_server_rest.put_rest("nodes/#{name}", self)
end
rescue Net::HTTPServerException => e
raise e unless e.response.code == "404"
chef_server_rest.post_rest("nodes", self)
end
self
end
# Create the node via the REST API
def create
chef_server_rest.post_rest("nodes", self)
self
end
# Set up our CouchDB design document
def self.create_design_document(couchdb=nil)
(couchdb || Chef::CouchDB.new).create_design_document("nodes", DESIGN_DOCUMENT)
end
def to_s
"node[#{name}]"
end
# Load all attribute files for all cookbooks associated with this
# node.
def load_attributes
cookbook_collection.values.each do |cookbook|
cookbook.segment_filenames(:attributes).each do |segment_filename|
Chef::Log.debug("Node #{name} loading cookbook #{cookbook.name}'s attribute file #{segment_filename}")
self.from_file(segment_filename)
end
end
end
# Used by DSL.
# Loads the attribute file specified by the short name of the
# file, e.g., loads specified cookbook's
# "attributes/mailservers.rb"
# if passed
# "mailservers"
def load_attribute_by_short_filename(name, src_cookbook_name)
src_cookbook = cookbook_collection[src_cookbook_name]
raise Chef::Exceptions::CookbookNotFound, "could not find cookbook #{src_cookbook_name} while loading attribute #{name}" unless src_cookbook
attribute_filename = src_cookbook.attribute_filenames_by_short_filename[name]
raise Chef::Exceptions::AttributeNotFound, "could not find filename for attribute #{name} in cookbook #{src_cookbook_name}" unless attribute_filename
self.from_file(attribute_filename)
self
end
end
end
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