vagrant/plugins/guests/debian/cap/change_host_name.rb

106 lines
3.8 KiB
Ruby

require "log4r"
require_relative "../../linux/cap/network_interfaces"
module VagrantPlugins
module GuestDebian
module Cap
class ChangeHostName
extend Vagrant::Util::GuestInspection::Linux
def self.change_host_name(machine, name)
@logger = Log4r::Logger.new("vagrant::guest::debian::changehostname")
comm = machine.communicate
if !comm.test("hostname -f | grep '^#{name}$'", sudo: false)
basename = name.split(".", 2)[0]
comm.sudo <<-EOH.gsub(/^ {14}/, '')
# Set the hostname
echo '#{basename}' > /etc/hostname
# Prepend ourselves to /etc/hosts
grep -w '#{name}' /etc/hosts || {
if grep -w '^127\\.0\\.1\\.1' /etc/hosts ; then
sed -i'' 's/^127\\.0\\.1\\.1\\s.*$/127.0.1.1\\t#{name}\\t#{basename}/' /etc/hosts
else
sed -i'' '1i 127.0.1.1\\t#{name}\\t#{basename}' /etc/hosts
fi
}
# Update mailname
echo '#{name}' > /etc/mailname
EOH
if hostnamectl?(comm)
comm.sudo("hostnamectl set-hostname '#{basename}'")
else
comm.sudo <<-EOH.gsub(/^ {14}/, '')
hostname -F /etc/hostname
# Restart hostname services
if test -f /etc/init.d/hostname; then
/etc/init.d/hostname start || true
fi
if test -f /etc/init.d/hostname.sh; then
/etc/init.d/hostname.sh start || true
fi
EOH
end
restart_command = nil
if systemd?(comm)
if systemd_networkd?(comm)
@logger.debug("Attempting to restart networking with systemd-networkd")
restart_command = "systemctl restart systemd-networkd.service"
elsif systemd_controlled?(comm, "NetworkManager.service")
@logger.debug("Attempting to restart networking with NetworkManager")
restart_command = "systemctl restart NetworkManager.service"
end
end
if restart_command
comm.sudo(restart_command)
else
restart_each_interface(machine, @logger)
end
end
end
protected
# Due to how most Debian systems and older Ubuntu systems handle restarting
# networking, we cannot simply run the networking init script or use the ifup/down
# tools to restart all interfaces to renew the machines DHCP lease when setting
# its hostname. This method is a workaround for those older systems that
# cannoy reliably restart networking. It restarts each individual interface
# on its own instead.
#
# @param [Vagrant::Machine] machine
# @param [Log4r::Logger] logger
def self.restart_each_interface(machine, logger)
comm = machine.communicate
interfaces = VagrantPlugins::GuestLinux::Cap::NetworkInterfaces.network_interfaces(machine)
nettools = true
if systemd?(comm)
@logger.debug("Attempting to restart networking with systemctl")
nettools = false
else
@logger.debug("Attempting to restart networking with ifup/down nettools")
end
interfaces.each do |iface|
logger.debug("Restarting interface #{iface} on guest #{machine.name}")
if nettools
restart_command = "ifdown #{iface};ifup #{iface}"
else
restart_command = "systemctl stop ifup@#{iface}.service;systemctl start ifup@#{iface}.service"
end
comm.sudo(restart_command)
end
end
end
end
end
end