Sha256: 228dd9a3355d7b7c0e54a7efd2051668b9ba235b3d03652f7724a7f50d6129f7
Contents?: true
Size: 1.79 KB
Versions: 33
Compression:
Stored size: 1.79 KB
Contents
# frozen_string_literal: true
module Facter
module Resolvers
class Containers < BaseResolver
# :virtual
# :hypervisor
init_resolver
INFO = { 'docker' => 'id', 'lxc' => 'name' }.freeze
class << self
private
def post_resolve(fact_name, _options)
@fact_list.fetch(fact_name) { read_cgroup(fact_name) }
end
def read_cgroup(fact_name)
output_cgroup = Facter::Util::FileHelper.safe_read('/proc/1/cgroup', nil)
output_environ = Facter::Util::FileHelper.safe_read('/proc/1/environ', nil)
return unless output_cgroup && output_environ
output_docker = %r{docker/(.+)}.match(output_cgroup)
output_lxc = %r{^/lxc/([^/]+)}.match(output_cgroup)
lxc_from_environ = /container=lxc/ =~ output_environ
info, vm = extract_vm_and_info(output_docker, output_lxc, lxc_from_environ)
info, vm = extract_for_nspawn(output_environ) unless vm
@fact_list[:vm] = vm
@fact_list[:hypervisor] = { vm.to_sym => info } if vm
@fact_list[fact_name]
end
def extract_vm_and_info(output_docker, output_lxc, lxc_from_environ)
vm = nil
if output_docker
vm = 'docker'
info = output_docker[1]
end
vm = 'lxc' if output_lxc || lxc_from_environ
info = output_lxc[1] if output_lxc
[info ? { INFO[vm] => info } : {}, vm]
end
def extract_for_nspawn(output_environ)
nspawn = /container=systemd-nspawn/ =~ output_environ
if nspawn
vm = 'systemd_nspawn'
info = Facter::Util::FileHelper.safe_read('/etc/machine-id', nil)
end
[info ? { 'id' => info.strip } : {}, vm]
end
end
end
end
end
Version data entries
33 entries across 33 versions & 1 rubygems