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require 'tempfile'
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module Foreman
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module Renderer
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include ::Foreman::ForemanUrlRenderer
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ALLOWED_GENERIC_HELPERS ||= [ :foreman_url, :snippet, :snippets, :snippet_if_exists, :indent, :foreman_server_fqdn,
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:foreman_server_url, :log_debug, :log_info, :log_warn, :log_error, :log_fatal, :template_name, :dns_lookup,
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:pxe_kernel_options ]
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ALLOWED_HOST_HELPERS ||= [ :grub_pass, :ks_console, :root_pass,
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:media_path, :param_true?, :param_false?, :match ]
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ALLOWED_HELPERS ||= ALLOWED_GENERIC_HELPERS + ALLOWED_HOST_HELPERS
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ALLOWED_VARIABLES ||= [ :arch, :host, :osver, :mediapath, :mediaserver, :static,
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:repos, :dynamic, :kernel, :initrd, :xen,
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:preseed_server, :preseed_path, :provisioning_type, :template_name ]
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def template_logger
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@template_logger ||= Foreman::Logging.logger('templates')
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end
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def render_safe(template, allowed_methods = [], allowed_vars = {})
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if Setting[:safemode_render]
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box = Safemode::Box.new self, allowed_methods
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box.eval(ERB.new(template, nil, '-').src, allowed_vars)
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else
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allowed_vars.each { |k,v| instance_variable_set "@#{k}", v }
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ERB.new(template, nil, '-').result(binding)
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end
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end
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def foreman_server_fqdn
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config = URI.parse(Setting[:foreman_url])
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config.host
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end
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def foreman_server_url
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Setting[:foreman_url]
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end
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class_eval do
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[:debug, :info, :warn, :error, :fatal].each do |level|
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define_method("log_#{level}".to_sym) do |msg|
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template_logger.send(level, msg) if msg.present?
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end
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end
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end
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def template_name
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@template_name || 'Unnamed'
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end
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def pxe_kernel_options
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return '' unless @host || @host.operatingsystem
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@host.operatingsystem.pxe_kernel_options(@host.params).join(' ')
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rescue => e
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template_logger.warn "Unable to build PXE kernel options: #{e}"
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''
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end
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# provide embedded snippets support as simple erb templates
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def snippets(file)
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if Template.where(:name => file, :snippet => true).empty?
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render :partial => "unattended/snippets/#{file}"
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else
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return snippet(file.gsub(/^_/, ""))
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end
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end
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def snippet(name, options = {})
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if (template = Template.where(:name => name, :snippet => true).first)
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begin
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return unattended_render(template)
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rescue => exc
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raise "The snippet '#{name}' threw an error: #{exc}"
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end
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else
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if options[:silent]
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nil
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else
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raise "The specified snippet '#{name}' does not exist, or is not a snippet."
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end
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end
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end
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def snippet_if_exists(name)
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snippet name, :silent => true
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end
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def indent(count)
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return unless block_given? && (text = yield.to_s)
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prefix = " " * count
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prefix + text.gsub(/\n/, "\n#{prefix}")
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end
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def dns_lookup(name_or_ip)
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resolver = Resolv::DNS.new
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Timeout.timeout(Setting[:dns_conflict_timeout]) do
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begin
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resolver.getname(IPAddr.new(name_or_ip))
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rescue IPAddr::Error
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resolver.getaddress(name_or_ip)
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end
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end
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rescue => e
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log_warn "Template helper dns_lookup failed: #{e}"
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raise e
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end
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# accepts either template object or plain string
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def unattended_render(template, overridden_name = nil)
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@template_name = template.respond_to?(:name) ? template.name : (overridden_name || 'Unnamed')
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template_logger.info "Rendering template '#{@template_name}'"
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raise ::Foreman::Exception.new(N_("Template '%s' is either missing or has an invalid organization or location"), @template_name) if template.nil?
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content = template.respond_to?(:template) ? template.template : template
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allowed_variables = allowed_variables_mapping(ALLOWED_VARIABLES)
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render_safe content, ALLOWED_HELPERS, allowed_variables
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end
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def unattended_render_to_temp_file(content, prefix = id.to_s, options = {})
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file = ""
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Tempfile.open(prefix, Rails.root.join('tmp')) do |f|
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f.print(unattended_render(content))
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f.flush
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f.chmod options[:mode] if options[:mode]
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file = f
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end
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file
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end
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# can be used to load additional variable relevant for give pxe type, requires @host to be present
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def load_template_vars
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# load the os family default variables
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if @host.operatingsystem.respond_to?(:pxe_type)
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send "#{@host.operatingsystem.pxe_type}_attributes"
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pxe_config
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end
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@provisioning_type = @host.is_a?(Hostgroup) ? 'hostgroup' : 'host'
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# force static network configuration if static http parameter is defined, in the future this needs to go into the GUI
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@static = !params[:static].empty?
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# this is sent by the proxy when the templates feature is enabled
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# and is needed to direct the host to the correct url. without it, we increase
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# latency by requesting the correct url directly from the proxy.
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@template_url = params['url']
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end
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private
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# takes variable names array and loads instance variables with the same name like this
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# { :name => @name, :another => @another }
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def allowed_variables_mapping(variable_names)
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variable_names.reduce({}) do |mapping, var|
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mapping.update(var => instance_variable_get("@#{var}"))
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end
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end
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def alterator_attributes
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@mediapath = @host.operatingsystem.mediumpath @host
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@mediaserver = URI(@mediapath).host
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@metadata = params[:metadata].to_s
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end
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def jumpstart_attributes
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if @host.operatingsystem.supports_image && @host.use_image
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@install_type = "flash_install"
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# We have an individual override for the host's image file
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@archive_location = @host.image_file ? @host.image_file : @host.default_image_file
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else
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@install_type = "initial_install"
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@system_type = "standalone"
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@cluster = "SUNWCreq"
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@packages = "SUNWgzip"
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@locale = "C"
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end
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@disk = @host.diskLayout if @host.disk.present? || @host.ptable.present?
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end
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def kickstart_attributes
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@dynamic = @host.diskLayout =~ /^#Dynamic/ if (@host.respond_to?(:disk) && @host.disk.present?) || @host.ptable.present?
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@arch = @host.architecture.name
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@osver = @host.operatingsystem.major.to_i
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@mediapath = @host.operatingsystem.mediumpath @host if @host.medium
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@repos = @host.operatingsystem.repos @host
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end
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def preseed_attributes
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if @host.operatingsystem && @host.medium && @host.architecture
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@preseed_path = @host.operatingsystem.preseed_path @host
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@preseed_server = @host.operatingsystem.preseed_server @host
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end
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end
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def yast_attributes
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@dynamic = @host.diskLayout =~ /^#Dynamic/ if (@host.respond_to?(:disk) && @host.disk.present?) || @host.ptable.present?
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@mediapath = @host.operatingsystem.mediumpath @host
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end
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def coreos_attributes
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@mediapath = @host.operatingsystem.mediumpath @host
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end
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def aif_attributes
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@mediapath = @host.operatingsystem.mediumpath @host
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end
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def memdisk_attributes
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@mediapath = @host.operatingsystem.mediumpath @host
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end
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def ZTP_attributes
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@mediapath = @host.operatingsystem.mediumpath @host
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end
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def waik_attributes
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end
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def xenserver_attributes
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@mediapath = @host.operatingsystem.mediumpath @host
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@xen = @host.operatingsystem.xen @host.arch
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end
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def pxe_config
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@kernel = @host.operatingsystem.kernel @host.arch
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@initrd = @host.operatingsystem.initrd @host.arch
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end
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end
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end
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