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require 'fog_extensions'
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class ComputeResource < ActiveRecord::Base
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include Taxonomix
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PROVIDERS = %w[ Libvirt Ovirt EC2 Vmware Openstack].delete_if{|p| p == "Libvirt" && !SETTINGS[:libvirt]}
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audited :except => [:password, :attrs]
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serialize :attrs, Hash
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has_many :trends, :as => :trendable, :class_name => "ForemanTrend"
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# to STI avoid namespace issues when loading the class, we append Foreman::Model in our database type column
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STI_PREFIX= "Foreman::Model"
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before_destroy EnsureNotUsedBy.new(:hosts)
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include Authorization
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has_and_belongs_to_many :users, :join_table => "user_compute_resources"
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validates_format_of :name, :with => /\A(\S+)\Z/, :message => "can't be blank or contain white spaces."
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validates_uniqueness_of :name
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validates_presence_of :provider, :in => PROVIDERS
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validates_presence_of :url
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scoped_search :on => :name, :complete_value => :true
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before_save :sanitize_url
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has_many :hosts
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has_many :images, :dependent => :destroy
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before_validation :set_attributes_hash
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# with proc support, default_scope can no longer be chained
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# include all default scoping here
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default_scope lambda {
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with_taxonomy_scope do
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order("LOWER(compute_resources.name)")
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end
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}
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scope :my_compute_resources, lambda {
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user = User.current
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if user.admin?
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conditions = { }
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else
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conditions = sanitize_sql_for_conditions([" (compute_resources.id in (?))", user.compute_resources.map(&:id)])
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conditions.sub!(/\s*\(\)\s*/, "")
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conditions.sub!(/^(?:\(\))?\s?(?:and|or)\s*/, "")
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conditions.sub!(/\(\s*(?:or|and)\s*\(/, "((")
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end
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where(conditions).reorder('type, name')
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}
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# allows to create a specific compute class based on the provider.
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def self.new_provider args
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raise "must provide a provider" unless provider = args[:provider]
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PROVIDERS.each do |p|
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return "#{STI_PREFIX}::#{p}".constantize.new(args) if p.downcase == provider.downcase
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end
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raise "unknown Provider"
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end
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def capabilities
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[]
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end
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# attributes that this provider can provide back to the host object
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def provided_attributes
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{:uuid => :identity}
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end
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def test_connection
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valid?
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end
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def save_vm uuid, attr
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vm = find_vm_by_uuid(uuid)
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vm.attributes.merge!(attr.symbolize_keys)
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vm.save
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end
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def to_param
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"#{id}-#{name.parameterize}"
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end
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def to_label
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"#{name} (#{provider_friendly_name})"
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end
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def provider_friendly_name
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list = SETTINGS[:libvirt] ? ["Libvirt"] : []
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list += %w[ oVirt EC2 VMWare OpenStack ]
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list[PROVIDERS.index(provider)] rescue ""
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end
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# returns a new fog server instance
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def new_vm attr={}
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client.servers.new vm_instance_defaults.merge(attr)
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end
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# return fog new interface ( network adapter )
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def new_interface attr={}
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client.interfaces.new attr
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end
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# return a list of virtual machines
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def vms
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client.servers
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end
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def find_vm_by_uuid uuid
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client.servers.get(uuid) || raise(ActiveRecord::RecordNotFound)
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end
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def start_vm uuid
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find_vm_by_uuid(uuid).start
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end
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def stop_vm uuid
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find_vm_by_uuid(uuid).stop
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end
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def create_vm args = {}
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client.servers.create vm_instance_defaults.merge(args.to_hash)
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rescue Fog::Errors::Error => e
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logger.debug "Fog error: #{e.message}\n " + e.backtrace.join("\n ")
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errors.add(:base, e.message.to_s)
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false
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end
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def destroy_vm uuid
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find_vm_by_uuid(uuid).destroy
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end
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def provider
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read_attribute(:type).to_s.gsub("#{STI_PREFIX}::","")
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end
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def provider=(value)
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if PROVIDERS.include? value
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self.type = "#{STI_PREFIX}::#{value}"
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end
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end
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def vm_instance_defaults
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{
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'name' => "foreman_#{Time.now.to_i}",
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}
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end
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def hardware_profiles(opts={})
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end
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def hardware_profile(id,opts={})
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end
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def update_required?(old_attrs, new_attrs)
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old_attrs.merge(new_attrs) do |k,old_v,new_v|
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update_required?(old_v, new_v) if old_v.is_a?(Hash)
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return true unless old_v == new_v
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new_v
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end
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false
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end
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def as_json(options={})
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super({:except => [:password]}.merge(options))
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end
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def console uuid = nil
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raise "#{provider} console is not supported at this time"
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end
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# by default, our compute providers do not support updating an existing instance
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def supports_update?
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false
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end
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protected
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def client
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raise "Not implemented"
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end
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def sanitize_url
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self.url.chomp!("/") unless url.empty?
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end
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def random_password
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n = 8
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chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890'
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(0...n).map { chars[rand(chars.length)].chr }.join
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end
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def nested_attributes_for type, opts
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return [] unless opts
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opts = opts.dup #duplicate to prevent changing the origin opts.
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opts.delete("new_#{type}") # delete template
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# convert our options hash into a sorted array (e.g. to preserve nic / disks order)
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opts = opts.sort { |l, r| l[0].sub('new_','').to_i <=> r[0].sub('new_','').to_i }.map { |e| Hash[e[1]] }
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opts.map do |v|
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if v[:"_delete"] == '1' && v[:id].blank?
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nil
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else
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v.symbolize_keys # convert to symbols deeper hashes
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end
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end.compact
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end
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private
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def enforce_permissions operation
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# We get called again with the operation being set to create
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return true if operation == "edit" and new_record?
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current = User.current
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if current.allowed_to?("#{operation}_compute_resources".to_sym)
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# If you can create compute resources then you can create them anywhere
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return true if operation == "create"
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# edit or delete
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if current.allowed_to?("#{operation}_compute_resources".to_sym)
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return true if ComputeResource.my_compute_resources.include? self
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end
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end
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errors.add :base, "You do not have permission to #{operation} this compute resource"
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false
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end
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def set_attributes_hash
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self.attrs ||= {}
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end
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end
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