docker? returns true if the process is running inside of a docker container. Implementation derived from observation of a boot2docker system
# File lib/facter/util/virtual.rb, line 154 def self.docker? path = Pathname.new('/proc/1/cgroup') return false unless path.readable? in_docker = path.readlines.any? {|l| l.split(":")[2].to_s.start_with? '/docker/' } return true if in_docker return false end
# File lib/facter/util/virtual.rb, line 123 def self.gce? File.read("/sys/devices/virtual/dmi/id/product_name") =~ /Google/ rescue false end
# File lib/facter/util/virtual.rb, line 135 def self.hpvm? Facter::Core::Execution.exec("/usr/bin/getconf MACHINE_MODEL").chomp =~ /Virtual Machine/ end
# File lib/facter/util/virtual.rb, line 127 def self.jail? path = case Facter.value(:kernel) when "FreeBSD" then "/sbin" when "GNU/kFreeBSD" then "/bin" end Facter::Core::Execution.exec("#{path}/sysctl -n security.jail.jailed") == "1" end
# File lib/facter/util/virtual.rb, line 93 def self.kvm? txt = if FileTest.exists?("/proc/cpuinfo") File.read("/proc/cpuinfo") elsif ["FreeBSD", "OpenBSD"].include? Facter.value(:kernel) Facter::Util::POSIX.sysctl("hw.model") end (txt =~ /QEMU Virtual CPU/) ? true : false end
# File lib/facter/util/virtual.rb, line 106 def self.kvm_type # TODO Tell the difference between kvm and qemu # Can't work out a way to do this at the moment that doesn't # require a special binary if self.kvm? "kvm" end end
lspci is a delegating helper method intended to make it easier to stub the system call without affecting other calls to Facter::Core::Execution.exec
# File lib/facter/util/virtual.rb, line 32 def self.lspci(command = "lspci 2>/dev/null") Facter::Core::Execution.exec command end
lxc? returns true if the process is running inside of a linux container. Implementation derived from stackoverflow.com/questions/20010199/determining-if-a-process-runs-inside-lxc-docker
# File lib/facter/util/virtual.rb, line 143 def self.lxc? path = Pathname.new('/proc/1/cgroup') return false unless path.readable? in_lxc = path.readlines.any? {|l| l.split(":")[2].to_s.start_with? '/lxc/' } return true if in_lxc return false end
# File lib/facter/util/virtual.rb, line 36 def self.openvz? FileTest.directory?("/proc/vz") and not self.openvz_cloudlinux? end
Cloudlinux uses OpenVZ to a degree, but always has an empty /proc/vz/ and has /proc/lve/list present
# File lib/facter/util/virtual.rb, line 55 def self.openvz_cloudlinux? FileTest.file?("/proc/lve/list") or Dir.glob('/proc/vz/*').empty? end
So one can either have #6728 work on OpenVZ or Cloudlinux. Whoo.
# File lib/facter/util/virtual.rb, line 41 def self.openvz_type return false unless self.openvz? return false unless FileTest.exists?( '/proc/self/status' ) envid = Facter::Core::Execution.exec( 'grep "envID" /proc/self/status' ) if envid =~ /^envID:\s+0$/ return 'openvzhn' elsif envid =~ /^envID:\s+(\d+)$/ return 'openvzve' end end
# File lib/facter/util/virtual.rb, line 119 def self.ovirt? File.read("/sys/devices/virtual/dmi/id/product_name") =~ /oVirt Node/ rescue false end
read_sysfs Reads the raw data as per the documentation at [Detecting if You Are Running in Google Compute Engine](developers.google.com/compute/docs/instances#dmi) This method is intended to provide an easy seam to mock.
@api public
@return [String] or nil if the path does not exist or is unreadable
# File lib/facter/util/virtual.rb, line 175 def self.read_sysfs_dmi_entries(path="/sys/firmware/dmi/entries/1-0/raw") if File.readable?(path) Facter::Util::FileRead.read_binary(path) end end
# File lib/facter/util/virtual.rb, line 115 def self.rhev? File.read("/sys/devices/virtual/dmi/id/product_name") =~ /RHEV Hypervisor/ rescue false end
virt_what is a delegating helper method intended to make it easier to stub the system call without affecting other calls to Facter::Core::Execution.exec
Per bugzilla.redhat.com/show_bug.cgi?id=719611 when run as a non-root user the virt-what command may emit an error message on stdout, and later versions of virt-what may emit this message on stderr. This method ensures stderr is redirected and that error messages are stripped from stdout.
# File lib/facter/util/virtual.rb, line 16 def self.virt_what(command = "virt-what") command = Facter::Core::Execution.which(command) return unless command if Facter.value(:kernel) == 'windows' redirected_cmd = "#{command} 2>NUL" else redirected_cmd = "#{command} 2>/dev/null" end output = Facter::Core::Execution.exec redirected_cmd output.gsub(/^virt-what: .*$/, '') if output end
# File lib/facter/util/virtual.rb, line 102 def self.virtualbox? File.read("/sys/devices/virtual/dmi/id/product_name") =~ /VirtualBox/ rescue false end
# File lib/facter/util/virtual.rb, line 66 def self.vserver? return false unless FileTest.exists?("/proc/self/status") txt = File.open("/proc/self/status", "rb").read if txt.respond_to?(:encode!) txt.encode!('UTF-16', 'UTF-8', :invalid => :replace) txt.encode!('UTF-8', 'UTF-16') end return true if txt =~ /^(s_context|VxID):[[:blank:]]*[0-9]/ return false end
# File lib/facter/util/virtual.rb, line 77 def self.vserver_type if self.vserver? if FileTest.exists?("/proc/virtual") "vserver_host" else "vserver" end end end
# File lib/facter/util/virtual.rb, line 87 def self.xen? ["/proc/sys/xen", "/sys/bus/xen", "/proc/xen" ].detect do |f| FileTest.exists?(f) end end
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