X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=plugins%2Fipv6.py;h=28e138fc0d362e7e98f56076bce46db4338466e2;hb=HEAD;hp=b627b58df348670703e816060927c5457a187e5c;hpb=b6ef770061128671bc199f62a25dca9bd480c5a5;p=nodemanager.git diff --git a/plugins/ipv6.py b/plugins/ipv6.py index b627b58..28e138f 100644 --- a/plugins/ipv6.py +++ b/plugins/ipv6.py @@ -3,8 +3,19 @@ """ Description: IPv6 Support and Management to Slices ipv6 nodemanager plugin -Version: 0.5 +Version: 0.8 Author: Guilherme Sperb Machado + +Requirements: +* The 'sliversipv6prefix' tag must have this format: + ipv6_address/prefix -- e.g., 2002:1000::1/64 +* The prefix specified on 'sliversipv6prefix' tag must be at least 64 + It should vary between 1 and 64, since it is the minimum amount of bits to + have native IPv6 auto-configuration. +* The ipv6_address in 'sliversipv6prefix' tag value can be any valid IPv6 address. + E.g., 2002:1000:: or 2002:1000::1 +* It is the node manager/admin responsibility to properly set the IPv6 routing, + since slivers should receive/send any kind of traffic. """ import logger @@ -13,19 +24,26 @@ import socket import re import tools -import libvirt import uuid -from sliver_libvirt import Sliver_Libvirt from xml.dom.minidom import parseString +# TODO: is there anything better to do if the "libvirt", "sliver_libvirt", +# and are not in place in the VS distro? +try: + import libvirt + from sliver_libvirt import Sliver_Libvirt +except: + logger.log("Could not import 'sliver_lxc' or 'libvirt'.") + priority=4 -radvdConfFile = '/etc/radvd.conf' +radvd_conf_file = '/etc/radvd.conf' +sliversipv6prefixtag = 'sliversipv6prefix' def start(): logger.log("ipv6: plugin starting up...") -def buildLibvirtDefaultNetConfig(dom): +def build_libvirt_default_net_config(dom): # create the element networkElem = dom.createElement("network") @@ -75,7 +93,7 @@ def buildLibvirtDefaultNetConfig(dom): networkElem.appendChild(ipElem0) return networkElem -def checkForIPv6(defaultNetworkConfig): +def check_for_ipv6(defaultNetworkConfig): netnodes = defaultNetworkConfig.getElementsByTagName('network') hasIPv6 = False for netnode in netnodes: @@ -88,7 +106,7 @@ def checkForIPv6(defaultNetworkConfig): return hasIPv6 -def addIPv6(defaultNetworkConfig, ipv6addr, prefix): +def add_ipv6(defaultNetworkConfig, ipv6addr, prefix): netnodes = defaultNetworkConfig.getElementsByTagName('network') for netnode in netnodes: @@ -108,7 +126,7 @@ def addIPv6(defaultNetworkConfig, ipv6addr, prefix): netnode.appendChild(ipElem2) return defaultNetworkConfig -def changeIPv6(dom, ipv6addr, prefix): +def change_ipv6(dom, ipv6addr, prefix): ips = dom.getElementsByTagName('ip') for ip in ips: if ip.getAttribute("family")=='ipv6' and not(re.match(r'fe80(.*)', ip.getAttribute("address"), re.I)): @@ -117,7 +135,7 @@ def changeIPv6(dom, ipv6addr, prefix): return dom -def removeIPv6(dom): +def remove_ipv6(dom): networks = dom.getElementsByTagName('network') for network in networks: ips = network.getElementsByTagName('ip') @@ -127,7 +145,7 @@ def removeIPv6(dom): return dom -def checkIfIPv6IsDifferent(dom, ipv6addr, prefix): +def check_if_ipv6_is_different(dom, ipv6addr, prefix): netnodes = dom.getElementsByTagName('network') for netnode in netnodes: ips = netnode.getElementsByTagName('ip') @@ -135,29 +153,29 @@ def checkIfIPv6IsDifferent(dom, ipv6addr, prefix): if ip.getAttribute('family')=='ipv6' and \ not ( re.match(r'fe80(.*)', ip.getAttribute("address"), re.I) ) and \ (ip.getAttribute('address')!=ipv6addr or ip.getAttribute('prefix')!=prefix) : - logger.log("ipv6: the IPv6 address or prefix are different. Change detected!") + logger.log("ipv6: IPv6 address or prefix are different. Change detected!") return True return False -def setAutostart(network): +def set_autostart(network): try: network.setAutostart(1) except: logger.log("ipv6: network could not set to autostart") -def setUp(networkLibvirt, connLibvirt, networkElem, ipv6addr, prefix): +def set_up(networkLibvirt, connLibvirt, networkElem, ipv6addr, prefix): newXml = networkElem.toxml() #logger.log(networkElem.toxml()) #ret = dir(conn) #for method in ret: - # logger.log(repr(method)) + # logger.log(repr(method)) networkLibvirt.undefine() networkLibvirt.destroy() connLibvirt.networkCreateXML(newXml) networkDefault = connLibvirt.networkDefineXML(newXml) - setAutostart(networkDefault) + set_autostart(networkDefault) commandForwarding = ['sysctl', '-w', 'net.ipv6.conf.all.forwarding=1'] logger.log_call(commandForwarding, timeout=15*60) configRadvd = """ @@ -175,92 +193,106 @@ interface virbr0 }; """ % locals() - with open(radvdConfFile,'w') as f: + with open(radvd_conf_file, 'w') as f: f.write(configRadvd) - killRadvd() - startRadvd() - logger.log("ipv6: set up process finalized. Enabled IPv6 address to the slivers!") + kill_radvd() + start_radvd() + logger.log("ipv6: set up process finalized -- enabled IPv6 address to the slivers!") -def cleanUp(networkLibvirt, connLibvirt, networkElem): - dom = removeIPv6(networkElem) +def clean_up(networkLibvirt, connLibvirt, networkElem): + dom = remove_ipv6(networkElem) newXml = dom.toxml() networkLibvirt.undefine() networkLibvirt.destroy() # TODO: set autostart for the network connLibvirt.networkCreateXML(newXml) networkDefault = connLibvirt.networkDefineXML(newXml) - setAutostart(networkDefault) - killRadvd() + set_autostart(networkDefault) + kill_radvd() logger.log("ipv6: cleanup process finalized. The IPv6 support on the slivers was removed.") -def killRadvd(): - commandKillRadvd = ['killall', 'radvd'] - logger.log_call(commandKillRadvd, timeout=15*60) +def kill_radvd(): + command_kill_radvd = ['killall', 'radvd'] + logger.log_call(command_kill_radvd, timeout=15*60) -def startRadvd(): +def start_radvd(): commandRadvd = ['radvd'] logger.log_call(commandRadvd, timeout=15*60) def GetSlivers(data, config, plc): type = 'sliver.LXC' + virt=tools.get_node_virt() + if virt!='lxc': + return interfaces = data['interfaces'] logger.log(repr(interfaces)) for interface in interfaces: - logger.log('ipv6: get interface 1: %r'%(interface)) - if 'interface_tag_ids' in interface: + #logger.log('ipv6: get interface: %r'%(interface)) + if 'interface_tag_ids' in interface: interface_tag_ids = "interface_tag_ids" - interface_tag_id = "interface_tag_id" - settings = plc.GetInterfaceTags({interface_tag_id:interface[interface_tag_ids]}) - isSliversIPv6PrefixSet = False - for setting in settings: - #logger.log(repr(setting)) - # TODO: create a static variable to describe the "sliversipv6prefix" tag - if setting['tagname']=='sliversipv6prefix': - ipv6addrprefix = setting['value'].split('/', 1) - ipv6addr = ipv6addrprefix[0] - prefix = ipv6addrprefix[1] - logger.log("ipv6: %s" % (ipv6addr) ) - validIPv6 = tools.isValidIPv6(ipv6addr) - if not(validIPv6): - logger.log("ipv6: the 'sliversipv6prefix' tag presented a non-valid IPv6 address!") - else: - # connecting to the libvirtd - connLibvirt = Sliver_Libvirt.getConnection(type) - list = connLibvirt.listAllNetworks() - for networkLibvirt in list: - xmldesc = networkLibvirt.XMLDesc() - dom = parseString(xmldesc) - hasIPv6 = checkForIPv6(dom) - if hasIPv6: - # let's first check if the IPv6 is different or is it the same... - isDifferent = checkIfIPv6IsDifferent(dom, ipv6addr, prefix) - if isDifferent: - logger.log("ipv6: tag 'sliversipv6prefix' was modified! " + + interface_tag_id = "interface_tag_id" + settings = plc.GetInterfaceTags({interface_tag_id:interface[interface_tag_ids]}) + is_slivers_ipv6_prefix_set = False + for setting in settings: + if setting['tagname']==sliversipv6prefixtag: + ipv6addrprefix = setting['value'].split('/', 1) + ipv6addr = ipv6addrprefix[0] + valid_prefix = False + #logger.log("ipv6: len(ipv6addrprefix)=%s" % (len(ipv6addrprefix)) ) + if len(ipv6addrprefix)>1: + prefix = ipv6addrprefix[1] + #logger.log("ipv6: prefix=%s" % (prefix) ) + if int(prefix)>0 and int(prefix)<=64: + valid_prefix = True + else: + valid_prefix = False + else: + valid_prefix = False + #logger.log("ipv6: '%s'=%s" % (sliversipv6prefixtag, ipv6addr) ) + valid_ipv6 = tools.is_valid_ipv6(ipv6addr) + if not(valid_ipv6): + logger.log("ipv6: the 'sliversipv6prefix' tag presented a non-valid IPv6 address!") + elif not(valid_prefix): + logger.log("ipv6: the '%s' tag does not present a valid prefix (e.g., '/64', '/58')!" % \ + (sliversipv6prefixtag)) + else: + # connecting to the libvirtd + connLibvirt = Sliver_Libvirt.getConnection(type) + list = connLibvirt.listAllNetworks() + for networkLibvirt in list: + xmldesc = networkLibvirt.XMLDesc() + dom = parseString(xmldesc) + has_ipv6 = check_for_ipv6(dom) + if has_ipv6: + # let's first check if the IPv6 is different or is it the same... + is_different = check_if_ipv6_is_different(dom, ipv6addr, prefix) + if is_different: + logger.log("ipv6: tag 'sliversipv6prefix' was modified! " + "Updating configuration with the new one...") - networkElem = changeIPv6(dom, ipv6addr, prefix) - setUp(networkLibvirt, connLibvirt, networkElem, ipv6addr, prefix) + network_elem = change_ipv6(dom, ipv6addr, prefix) + set_up(networkLibvirt, connLibvirt, network_elem, ipv6addr, prefix) + logger.log("ipv6: trying to reboot the slivers...") + tools.reboot_slivers() + else: + logger.log("ipv6: starting to redefine the virtual network...") + #network_elem = buildLibvirtDefaultNetConfig(dom, ipv6addr, prefix) + network_elem = add_ipv6(dom, ipv6addr, prefix) + set_up(networkLibvirt, connLibvirt, network_elem, ipv6addr, prefix) logger.log("ipv6: trying to reboot the slivers...") - tools.reboot_sliver('blah') - else: - logger.log("ipv6: starting to redefine the virtual network...") - #networkElem = buildLibvirtDefaultNetConfig(dom,ipv6addr,prefix) - networkElem = addIPv6(dom, ipv6addr, prefix) - setUp(networkLibvirt, connLibvirt, networkElem, ipv6addr, prefix) - logger.log("ipv6: trying to reboot the slivers...") - tools.reboot_sliver('blah') - isSliversIPv6PrefixSet = True - if not(isSliversIPv6PrefixSet): - # connecting to the libvirtd - connLibvirt = Sliver_Libvirt.getConnection(type) - list = connLibvirt.listAllNetworks() - for networkLibvirt in list: - xmldesc = networkLibvirt.XMLDesc() - dom = parseString(xmldesc) - if checkForIPv6(dom): - cleanUp(networkLibvirt, connLibvirt, dom) - logger.log("ipv6: trying to reboot the slivers...") - tools.reboot_sliver('blah') + tools.reboot_slivers() + is_slivers_ipv6_prefix_set = True + if not(is_slivers_ipv6_prefix_set): + # connecting to the libvirtd + connLibvirt = Sliver_Libvirt.getConnection(type) + list = connLibvirt.listAllNetworks() + for networkLibvirt in list: + xmldesc = networkLibvirt.XMLDesc() + dom = parseString(xmldesc) + if check_for_ipv6(dom): + clean_up(networkLibvirt, connLibvirt, dom) + logger.log("ipv6: trying to reboot the slivers...") + tools.reboot_slivers() logger.log("ipv6: all done!")