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Contents
# frozen_string_literal: true
module Facter
module Resolvers
class Xen < BaseResolver
init_resolver
XEN_PATH = '/proc/xen/capabilities'
XEN_TOOLSTACK = '/usr/lib/xen-common/bin/xen-toolstack'
XEN_COMMANDS = ['/usr/sbin/xl', '/usr/sbin/xm'].freeze
class << self
private
def post_resolve(fact_name, _options)
@fact_list.fetch(fact_name) { detect_xen(fact_name) }
end
def detect_xen(fact_name)
@fact_list[:vm] = detect_xen_type
@fact_list[:privileged] = privileged?(@fact_list[:vm])
@fact_list[:domains] = detect_domains
@fact_list[fact_name]
end
def detect_xen_type
xen_type = 'xen0' if File.exist?('/dev/xen/evtchn')
xen_type = 'xenu' if !xen_type && (File.exist?('/proc/xen') || File.exist?('/dev/xvda1'))
xen_type
end
def privileged?(xen_type)
content = Facter::Util::FileHelper.safe_read(XEN_PATH, nil)
content&.strip == 'control_d' || xen_type == 'xen0'
end
def detect_domains
domains = []
xen_command = find_command
return unless xen_command
output = Facter::Core::Execution.execute("#{xen_command} list", logger: log)
return if output.empty?
output.each_line do |line|
next if line =~ /Domain-0|Name/
domain = line.match(/^([^\s]*)\s/)
domain = domain&.captures&.first
domains << domain if domain
end
domains
end
def find_command
num_stacks = 0
XEN_COMMANDS.each do |command|
num_stacks += 1 if File.exist?(command)
end
return XEN_TOOLSTACK if num_stacks > 1 && File.exist?(XEN_TOOLSTACK)
XEN_COMMANDS.each { |command| return command if File.exist?(command) }
end
end
end
end
end
Version data entries
17 entries across 17 versions & 1 rubygems