/usr/share/rubygems-integration/all/gems/vagrant-libvirt-0.0.43/lib/vagrant-libvirt/action/create_networks.rb is in vagrant-libvirt 0.0.43-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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require 'vagrant/util/network_ip'
require 'vagrant/util/scoped_hash_override'
require 'ipaddr'
require 'thread'
module VagrantPlugins
module ProviderLibvirt
module Action
# Prepare all networks needed for domain connections.
class CreateNetworks
include Vagrant::Util::NetworkIP
include Vagrant::Util::ScopedHashOverride
include VagrantPlugins::ProviderLibvirt::Util::ErbTemplate
include VagrantPlugins::ProviderLibvirt::Util::NetworkUtil
@@lock = Mutex.new
def initialize(app, env)
mess = 'vagrant_libvirt::action::create_networks'
@logger = Log4r::Logger.new(mess)
@app = app
@available_networks = []
@options = {}
@libvirt_client = env[:machine].provider.driver.connection.client
end
def call(env)
# only one vm at a time should try to set up networks
# otherwise they'll have inconsitent views of current state
# and conduct redundant operations that cause errors
@@lock.synchronize do
# Iterate over networks If some network is not
# available, create it if possible. Otherwise raise an error.
configured_networks(env, @logger).each do |options|
# Only need to create private networks
next if options[:iface_type] != :private_network ||
options.fetch(:tunnel_type, nil)
@logger.debug "Searching for network with options #{options}"
# should fix other methods so this doesn't have to be instance var
@options = options
# Get a list of all (active and inactive) libvirt networks. This
# list is used throughout this class and should be easier to
# process than libvirt API calls.
@available_networks = libvirt_networks(
env[:machine].provider.driver.connection.client
)
# Prepare a hash describing network for this specific interface.
@interface_network = {
name: nil,
ip_address: nil,
netmask: @options[:netmask],
network_address: nil,
bridge_name: nil,
domain_name: nil,
ipv6_address: options[:ipv6_address] || nil,
ipv6_prefix: options[:ipv6_prefix] || nil,
created: false,
active: false,
autostart: options[:autostart] || false,
guest_ipv6: @options[:guest_ipv6] || 'yes',
libvirt_network: nil
}
if @options[:ip]
handle_ip_option(env)
elsif @options[:type].to_s == 'dhcp'
handle_dhcp_private_network(env)
elsif @options[:network_name]
handle_network_name_option(env)
else
raise Errors::CreateNetworkError, error_message: @options
end
autostart_network if @interface_network[:autostart]
activate_network unless @interface_network[:active]
end
end
@app.call(env)
end
private
def lookup_network_by_ip(ip)
@logger.debug "looking up network with ip == #{ip}"
@available_networks.find { |network| network[:network_address] == ip }
end
# Return hash of network for specified name, or nil if not found.
def lookup_network_by_name(network_name)
@logger.debug "looking up network named #{network_name}"
@available_networks.find { |network| network[:name] == network_name }
end
# Return hash of network for specified bridge, or nil if not found.
def lookup_bridge_by_name(bridge_name)
@logger.debug "looking up bridge named #{bridge_name}"
@available_networks.find { |network| network[:bridge_name] == bridge_name }
end
# Throw an error if dhcp setting for an existing network does not
# match what was configured in the vagrantfile
# since we always enable dhcp for the management network
# this ensures we wont start a vm vagrant cant reach
# Allow the situation where DHCP is not requested (:libvirt__dhcp_enabled == false)
# but where it is enabled on the virtual network
def verify_dhcp
if @interface_network[:dhcp_enabled] == true && @options[:dhcp_enabled] == false
raise Errors::DHCPMismatch,
network_name: @interface_network[:name],
requested: @options[:dhcp_enabled] ? 'enabled' : 'disabled'
end
end
# Handle only situations, when ip is specified. Variables @options and
# @available_networks should be filled before calling this function.
def handle_ip_option(env)
return unless @options[:ip]
net_address = nil
unless @options[:forward_mode] == 'veryisolated'
net_address = network_address(@options[:ip], @options[:netmask])
# Set IP address of network (actually bridge). It will be used as
# gateway address for machines connected to this network.
@interface_network[:ip_address] = get_host_ip_addr(net_address)
end
@interface_network[:network_address] = net_address
# if network is veryisolated, search by name
network = if @options[:libvirt__forward_mode] == 'veryisolated'
lookup_network_by_name(@options[:network_name])
elsif net_address
# otherwise, search by ip (if set)
lookup_network_by_ip(net_address)
else
# leaving this here to mimic prior behavior. If we get
# here, something's probably broken.
lookup_network_by_name(@options[:network_name])
end
@interface_network = network if network
verify_dhcp if @interface_network[:created]
if @options[:network_name]
@logger.debug 'Checking that network name does not clash with ip'
if @interface_network[:created]
# Just check for mismatch error here - if name and ip from
# config match together.
if @options[:network_name] != @interface_network[:name]
raise Errors::NetworkNameAndAddressMismatch,
ip_address: @options[:ip],
network_name: @options[:network_name]
end
else
# Network is not created, but name is set. We need to check,
# whether network name from config doesn't already exist.
if lookup_network_by_name @options[:network_name]
raise Errors::NetworkNameAndAddressMismatch,
ip_address: @options[:ip],
network_name: @options[:network_name]
end
# Network with 'name' doesn't exist. Set it as name for new
# network.
@interface_network[:name] = @options[:network_name]
end
end
# Do we need to create new network?
unless @interface_network[:created]
# TODO: stop after some loops. Don't create infinite loops.
# Is name for new network set? If not, generate a unique one.
count = 0
while @interface_network[:name].nil?
@logger.debug 'generating name for network'
# Generate a network name.
network_name = env[:root_path].basename.to_s.dup
network_name << count.to_s
count += 1
# Check if network name is unique.
next if lookup_network_by_name(network_name)
@interface_network[:name] = network_name
end
# Generate a unique name for network bridge.
@interface_network[:bridge_name] = generate_bridge_name
# Create a private network.
create_private_network(env)
end
end
# Handle network_name option, if ip was not specified. Variables
# @options and @available_networks should be filled before calling this
# function.
def handle_network_name_option(env)
return if @options[:ip] || \
!@options[:network_name] || \
!@options[:libvirt__forward_mode] == 'veryisolated'
network = lookup_network_by_name(@options[:network_name])
@interface_network = network if network
if @options[:libvirt__forward_mode] == 'veryisolated'
# if this interface has a network address, something's wrong.
if @interface_network[:network_address]
raise Errors::NetworkNotAvailableError,
network_name: @options[:network_name]
end
else
if !@interface_network
raise Errors::NetworkNotAvailableError,
network_name: @options[:network_name]
else
verify_dhcp
end
end
# Do we need to create new network?
unless @interface_network[:created]
@interface_network[:name] = @options[:network_name]
@interface_network[:ip_address] ||= @options[:host_ip]
# Generate a unique name for network bridge.
@interface_network[:bridge_name] = generate_bridge_name
# Create a private network.
create_private_network(env)
end
end
def handle_dhcp_private_network(env)
net_address = @options[:libvirt__network_address]
net_address = '172.28.128.0' unless net_address
network = lookup_network_by_ip(net_address)
@interface_network = network if network
# Do we need to create new network?
unless @interface_network[:created]
@interface_network[:name] = 'vagrant-private-dhcp'
@interface_network[:network_address] = net_address
# Set IP address of network (actually bridge). It will be used as
# gateway address for machines connected to this network.
@interface_network[:ip_address] = get_host_ip_addr(net_address)
# Generate a unique name for network bridge.
@interface_network[:bridge_name] = generate_bridge_name
# Create a private network.
create_private_network(env)
end
end
# Return provided address or first address of network otherwise
def get_host_ip_addr(network)
@options[:host_ip] ? IPAddr.new(@options[:host_ip]) : IPAddr.new(network).succ
end
# Return the first available virbr interface name
def generate_bridge_name
@logger.debug 'generating name for bridge'
count = 0
while lookup_bridge_by_name(bridge_name = "virbr#{count}")
count += 1
end
@logger.debug "found available bridge name #{bridge_name}"
bridge_name
end
def create_private_network(env)
@network_name = @interface_network[:name]
@network_bridge_name = @interface_network[:bridge_name]
@network_address = @interface_network[:ip_address]
@network_netmask = @interface_network[:netmask]
@network_mtu = Integer(@options[:mtu]) if @options[:mtu]
@guest_ipv6 = @interface_network[:guest_ipv6]
@network_ipv6_address = @interface_network[:ipv6_address]
@network_ipv6_prefix = @interface_network[:ipv6_prefix]
@network_forward_mode = @options[:forward_mode]
if @options[:forward_device]
@network_forward_device = @options[:forward_device]
end
if @options[:dhcp_enabled]
# Find out DHCP addresses pool range.
network_address = "#{@interface_network[:network_address]}/"
network_address << (@interface_network[:netmask]).to_s
net = @interface_network[:network_address] ? IPAddr.new(network_address) : nil
# First is address of network, second is gateway (by default).
# So start the range two addresses after network address by default.
# TODO: Detect if this IP is not set on the interface.
start_address = @options[:dhcp_start] || net.to_range.begin.succ
# Default to last possible address. (Stop address must not be broadcast address.)
stop_address = @options[:dhcp_stop] || (net.to_range.end & IPAddr.new('255.255.255.254'))
@network_dhcp_enabled = true
@network_dhcp_bootp_file = @options[:dhcp_bootp_file]
@network_dhcp_bootp_server = @options[:dhcp_bootp_server]
@network_range_start = start_address
@network_range_stop = stop_address
else
@network_dhcp_enabled = false
end
@network_domain_name = @options[:domain_name]
begin
@interface_network[:libvirt_network] = \
@libvirt_client.define_network_xml(to_xml('private_network'))
@logger.debug 'created network'
rescue => e
raise Errors::CreateNetworkError, error_message: e.message
end
created_networks_file = env[:machine].data_dir + 'created_networks'
message = 'Saving information about created network '
message << "#{@interface_network[:name]}, "
message << "UUID=#{@interface_network[:libvirt_network].uuid} "
message << "to file #{created_networks_file}."
@logger.info(message)
File.open(created_networks_file, 'a') do |file|
file.puts @interface_network[:libvirt_network].uuid
end
end
def autostart_network
@interface_network[:libvirt_network].autostart = true
rescue => e
raise Errors::AutostartNetworkError, error_message: e.message
end
def activate_network
@interface_network[:libvirt_network].create
rescue => e
raise Errors::ActivateNetworkError, error_message: e.message
end
end
end
end
end
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