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require 'rexml/document'
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module Proxy::Virsh
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include Proxy::Log
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include Proxy::Util
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attr_reader :network
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def dump_xml
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@xml_dump ||= virsh('net-dumpxml', network)
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end
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def find_ip_for_host host
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doc = REXML::Document.new xml = dump_xml
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doc.elements.each("network/dns/host/hostname") do |e|
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if e.text == host
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return e.parent.attributes["ip"]
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end
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end
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raise Proxy::DNS::Error.new("Cannot find DNS entry for #{host}")
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rescue Exception => e
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msg = "DNS virsh provider error: unable to retrive virsh info: #{e}"
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logger.error msg
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logger.debug xml if defined?(xml)
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raise Proxy::DNS::Error, msg
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end
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def virsh *params
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unless sudo_cmd = which("sudo", "/usr/bin", "/usr/sbin")
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raise "DNS virsh provider error: sudo binary was not found"
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end
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unless virsh_cmd = which("virsh", "/usr/bin", "/usr/sbin")
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raise "DNS virsh provider error: virsh binary was not found"
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end
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logger.debug command = ([sudo_cmd, virsh_cmd] + params + ['2>&1']).join(' ')
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stdout = `#{command}`
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if $? == 0
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return stdout
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else
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raise "DNS virsh provider error: virsh call failed (#{$?}) - #{stdout}"
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end
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end
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def virsh_update_dns command, hostname, ip
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hostname = escape_for_shell(hostname)
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ip = escape_for_shell(ip)
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net = escape_for_shell(network)
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virsh "net-update", net, command, "dns-host",
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"--xml", "'<host ip=\"#{ip}\"><hostname>#{hostname}</hostname></host>'",
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"--live", "--config"
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rescue Exception => e
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raise Proxy::DNS::Error, "Failed to update DNS: #{e}"
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end
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def virsh_update_dhcp command, mac, ip
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mac = escape_for_shell(mac)
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ip = escape_for_shell(ip)
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net = escape_for_shell(network)
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virsh "net-update", net, command, "ip-dhcp-host",
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"--xml", "'<host mac=\"#{mac}\" ip=\"#{ip}\"/>'",
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"--live", "--config"
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rescue Exception => e
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raise Proxy::DHCP::Error, "Failed to update DNS: #{e}"
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end
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end
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