#!/usr/bin/python # Version @VERSION@ # # A plugin for executing script needed by vmops cloud import os, sys, time import XenAPIPlugin sys.path.extend(["/opt/xensource/sm/", "/usr/local/sbin/", "/sbin/"]) import base64 import hostvmstats import socket import stat import tempfile import util import subprocess import zlib from util import CommandException def echo(fn): def wrapped(*v, **k): name = fn.__name__ util.SMlog("#### VMOPS enter %s ####" % name ) res = fn(*v, **k) util.SMlog("#### VMOPS exit %s ####" % name ) return res return wrapped @echo def gethostvmstats(session, args): collect_host_stats = args['collectHostStats'] consolidation_function = args['consolidationFunction'] interval = args['interval'] start_time = args['startTime'] result = hostvmstats.get_stats(session, collect_host_stats, consolidation_function, interval, start_time) return result @echo def setup_iscsi(session, args): uuid=args['uuid'] try: cmd = ["bash", "/opt/xensource/bin/setup_iscsi.sh", uuid] txt = util.pread2(cmd) except: txt = '' return txt @echo def getvncport(session, args): domid = args['domID'] hvm = args['hvm'] version = args['version'] if hvm == 'true': path1 = "/local/domain/" + domid + "/qemu-pid" path2 = "/local/domain/" + domid + "/console/vnc-port" else: if version[:3] == '6.0': path1 = "/local/domain/" + domid + "/vncterm-pid" path2 = "/local/domain/" + domid + "/console/vnc-port" else: path1 = "/local/domain/" + domid + "/serial/0/vncterm-pid" path2 = "/local/domain/" + domid + "/serial/0/vnc-port" try: cmd = ["xenstore-read", path1] pid = util.pread2(cmd) pid = pid.strip() cmd = ["ps", pid] util.pread2(cmd) cmd = ["xenstore-read", path2] vncport = util.pread2(cmd) vncport = vncport.strip() return vncport except: return '' @echo def getgateway(session, args): mgmt_ip = args['mgmtIP'] try: cmd = ["bash", "/opt/xensource/bin/network_info.sh", "-g", mgmt_ip] txt = util.pread2(cmd) except: txt = '' return txt @echo def preparemigration(session, args): uuid = args['uuid'] try: cmd = ["/opt/xensource/bin/make_migratable.sh", uuid] util.pread2(cmd) txt = 'success' except: util.SMlog("Catch prepare migration exception" ) txt = '' return txt @echo def setIptables(session, args): try: cmd = ["/bin/bash", "/opt/xensource/bin/setupxenserver.sh"] txt = util.pread2(cmd) txt = 'success' except: util.SMlog(" setIptables execution failed " ) txt = '' return txt @echo def pingdomr(session, args): host = args['host'] port = args['port'] socket.setdefaulttimeout(3) s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: s.connect((host,int(port))) txt = 'success' except: txt = '' s.close() return txt @echo def kill_copy_process(session, args): namelabel = args['namelabel'] try: cmd = ["bash", "/opt/xensource/bin/kill_copy_process.sh", namelabel] txt = util.pread2(cmd) except: txt = 'false' return txt @echo def pingxenserver(session, args): txt = 'success' return txt @echo def vm_data(session, args): router_ip = args.pop('routerIP') vm_ip = args.pop('vmIP') util.SMlog(" adding vmdata for VM with IP: " + vm_ip + " to router with IP: " + router_ip) for pair in args: pairList = pair.split(',') vmDataFolder = pairList[0] vmDataFile = pairList[1] vmDataValue = args[pair] cmd = ["/bin/bash", "/opt/xensource/bin/vm_data.sh", "-r", router_ip, "-v", vm_ip, "-F", vmDataFolder, "-f", vmDataFile] fd = None tmp_path = None try: fd,tmp_path = tempfile.mkstemp() tmpfile = open(tmp_path, 'w') if vmDataFolder == "userdata" and vmDataValue != "none": vmDataValue = base64.urlsafe_b64decode(vmDataValue) if vmDataValue != "none": tmpfile.write(vmDataValue) tmpfile.close() cmd.append("-d") cmd.append(tmp_path) except: util.SMlog(" vmdata failed to write tempfile " ) os.close(fd) os.remove(tmp_path) return '' try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog(" vmdata failed with folder: " + vmDataFolder + " and file: " + vmDataFile) txt = '' if (fd != None): os.close(fd) os.remove(tmp_path) return txt def pingtest(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/pingtest.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog(" pingtest failed " ) txt = '' return txt @echo def savePassword(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/save_password_to_domr.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog(" save password to domr failed " ) txt = '' return txt @echo def saveDhcpEntry(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/dhcp_entry.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog(" save dhcp entry failed " ) txt = '' return txt @echo def lt2p_vpn(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/l2tp_vpn.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog("l2tp vpn failed " ) txt = '' return txt @echo def setLinkLocalIP(session, args): brName = args['brName'] try: cmd = ["ip", "route", "del", "169.254.0.0/16"] txt = util.pread2(cmd) except: txt = '' try: cmd = ["ifconfig", brName, "169.254.0.1", "netmask", "255.255.0.0"] txt = util.pread2(cmd) except: try: cmd = ['cat', '/etc/xensource/network.conf'] result = util.pread2(cmd) except: return 'can not cat network.conf' if result.lower() == "bridge": try: cmd = ["brctl", "addbr", brName] txt = util.pread2(cmd) except: pass else: try: cmd = ["ovs-vsctl", "add-br", brName] txt = util.pread2(cmd) except: pass try: cmd = ["ifconfig", brName, "169.254.0.1", "netmask", "255.255.0.0"] txt = util.pread2(cmd) except: pass try: cmd = ["ip", "route", "add", "169.254.0.0/16", "dev", brName, "src", "169.254.0.1"] txt = util.pread2(cmd) except: txt = '' txt = 'success' return txt @echo def setFirewallRule(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/call_firewall.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog(" set firewall rule failed " ) txt = '' return txt @echo def routerProxy(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/router_proxy.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog("routerProxy command " + sargs + " failed " ) txt = '' return txt @echo def setLoadBalancerRule(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/call_loadbalancer.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog(" set loadbalancer rule failed " ) txt = '' return txt @echo def createFile(session, args): file_path = args['filepath'] file_contents = args['filecontents'] try: f = open(file_path, "w") f.write(file_contents) f.close() txt = 'success' except: util.SMlog(" failed to create HA proxy cfg file ") txt = '' return txt @echo def deleteFile(session, args): file_path = args["filepath"] try: if os.path.isfile(file_path): os.remove(file_path) txt = 'success' except: util.SMlog(" failed to remove HA proxy cfg file ") txt = '' return txt def get_private_nic(session, args): vms = session.xenapi.VM.get_all() host_uuid = args.get('host_uuid') host = session.xenapi.host.get_by_uuid(host_uuid) piflist = session.xenapi.host.get_PIFs(host) mgmtnic = 'eth0' for pif in piflist: pifrec = session.xenapi.PIF.get_record(pif) network = pifrec.get('network') nwrec = session.xenapi.network.get_record(network) if nwrec.get('name_label') == 'cloud-guest': return pifrec.get('device') if pifrec.get('management'): mgmtnic = pifrec.get('device') return mgmtnic def chain_name(vm_name): if vm_name.startswith('i-') or vm_name.startswith('r-'): if vm_name.endswith('untagged'): return '-'.join(vm_name.split('-')[:-1]) return vm_name def chain_name_def(vm_name): if vm_name.startswith('i-'): if vm_name.endswith('untagged'): return '-'.join(vm_name.split('-')[:-2]) + "-def" return '-'.join(vm_name.split('-')[:-1]) + "-def" return vm_name def egress_chain_name(vm_name): return chain_name(vm_name) + "-eg" @echo def can_bridge_firewall(session, args): try: util.pread2(['ebtables', '-V']) util.pread2(['ipset', '-V']) except: return 'false' host_uuid = args.get('host_uuid') try: util.pread2(['iptables', '-N', 'BRIDGE-FIREWALL']) util.pread2(['iptables', '-I', 'BRIDGE-FIREWALL', '-m', 'state', '--state', 'RELATED,ESTABLISHED', '-j', 'ACCEPT']) util.pread2(['iptables', '-A', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '-p', 'udp', '--dport', '67', '--sport', '68', '-j', 'ACCEPT']) util.pread2(['iptables', '-A', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '-p', 'udp', '--dport', '68', '--sport', '67', '-j', 'ACCEPT']) util.pread2(['iptables', '-D', 'FORWARD', '-j', 'RH-Firewall-1-INPUT']) except: util.SMlog('Chain BRIDGE-FIREWALL already exists') privnic = get_private_nic(session, args) result = 'true' try: util.pread2(['/bin/bash', '-c', 'iptables -n -L FORWARD | grep BRIDGE-FIREWALL']) except: try: util.pread2(['iptables', '-I', 'FORWARD', '-m', 'physdev', '--physdev-is-bridged', '-j', 'BRIDGE-FIREWALL']) util.pread2(['iptables', '-A', 'FORWARD', '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', privnic, '-j', 'ACCEPT']) util.pread2(['iptables', '-A', 'FORWARD', '-j', 'DROP']) except: return 'false' default_ebtables_rules() allow_egress_traffic(session) if not os.path.exists('/var/run/cloud'): os.makedirs('/var/run/cloud') if not os.path.exists('/var/cache/cloud'): os.makedirs('/var/cache/cloud') #get_ipset_keyword() cleanup_rules_for_dead_vms(session) cleanup_rules(session, args) return result @echo def default_ebtables_rules(): try: util.pread2(['ebtables', '-N', 'DEFAULT_EBTABLES']) util.pread2(['ebtables', '-A', 'FORWARD', '-j' 'DEFAULT_EBTABLES']) util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '--ip-dst', '255.255.255.255', '--ip-proto', 'udp', '--ip-dport', '67', '-j', 'ACCEPT']) util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'ARP', '--arp-op', 'Request', '-j', 'ACCEPT']) util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'ARP', '--arp-op', 'Reply', '-j', 'ACCEPT']) # deny mac broadcast and multicast util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '-d', 'Broadcast', '-j', 'DROP']) util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '-d', 'Multicast', '-j', 'DROP']) # deny ip broadcast and multicast util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '--ip-dst', '255.255.255.255', '-j', 'DROP']) util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '--ip-dst', '224.0.0.0/4', '-j', 'DROP']) util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv4', '-j', 'RETURN']) # deny ipv6 util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', 'IPv6', '-j', 'DROP']) # deny vlan util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-p', '802_1Q', '-j', 'DROP']) # deny all others (e.g., 802.1d, CDP) util.pread2(['ebtables', '-A', 'DEFAULT_EBTABLES', '-j', 'DROP']) except: util.SMlog('Chain DEFAULT_EBTABLES already exists') @echo def allow_egress_traffic(session): devs = [] for pif in session.xenapi.PIF.get_all(): pif_rec = session.xenapi.PIF.get_record(pif) vlan = pif_rec.get('VLAN') dev = pif_rec.get('device') if vlan == '-1': devs.append(dev) else: devs.append(dev + "." + vlan) for d in devs: try: util.pread2(['/bin/bash', '-c', "iptables -n -L FORWARD | grep '%s '" % d]) except: try: util.pread2(['iptables', '-I', 'FORWARD', '2', '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', d, '-j', 'ACCEPT']) except: util.SMlog("Failed to add FORWARD rule through to %s" % d) return 'false' return 'true' def ipset(ipsetname, proto, start, end, ips): try: util.pread2(['ipset', '-N', ipsetname, 'iptreemap']) except: util.SMlog("ipset chain already exists" + ipsetname) result = True ipsettmp = ''.join(''.join(ipsetname.split('-')).split('_')) + str(int(time.time()) % 1000) try: util.pread2(['ipset', '-N', ipsettmp, 'iptreemap']) except: util.SMlog("Failed to create temp ipset, reusing old name= " + ipsettmp) try: util.pread2(['ipset', '-F', ipsettmp]) except: util.SMlog("Failed to clear old temp ipset name=" + ipsettmp) return False try: for ip in ips: try: util.pread2(['ipset', '-A', ipsettmp, ip]) except CommandException, cex: if cex.reason.rfind('already in set') == -1: raise except: util.SMlog("Failed to program ipset " + ipsetname) util.pread2(['ipset', '-F', ipsettmp]) util.pread2(['ipset', '-X', ipsettmp]) return False try: util.pread2(['ipset', '-W', ipsettmp, ipsetname]) except: util.SMlog("Failed to swap ipset " + ipsetname) result = False try: util.pread2(['ipset', '-F', ipsettmp]) util.pread2(['ipset', '-X', ipsettmp]) except: # if the temporary name clashes next time we'll just reuse it util.SMlog("Failed to delete temp ipset " + ipsettmp) return result @echo def destroy_network_rules_for_vm(session, args): vm_name = args.pop('vmName') vmchain = chain_name(vm_name) vmchain_egress = egress_chain_name(vm_name) vmchain_default = chain_name_def(vm_name) delete_rules_for_vm_in_bridge_firewall_chain(vm_name) if vm_name.startswith('i-') or vm_name.startswith('r-') or vm_name.startswith('l-'): try: util.pread2(['iptables', '-F', vmchain_default]) util.pread2(['iptables', '-X', vmchain_default]) except: util.SMlog("Ignoring failure to delete chain " + vmchain_default) destroy_ebtables_rules(vmchain) try: util.pread2(['iptables', '-F', vmchain]) util.pread2(['iptables', '-X', vmchain]) except: util.SMlog("Ignoring failure to delete ingress chain " + vmchain) try: util.pread2(['iptables', '-F', vmchain_egress]) util.pread2(['iptables', '-X', vmchain_egress]) except: util.SMlog("Ignoring failure to delete egress chain " + vmchain_egress) remove_rule_log_for_vm(vm_name) if 1 in [ vm_name.startswith(c) for c in ['r-', 's-', 'v-', 'l-'] ]: return 'true' try: setscmd = "ipset --save | grep " + vmchain + " | grep '^-N' | awk '{print $2}'" setsforvm = util.pread2(['/bin/bash', '-c', setscmd]).split('\n') for set in setsforvm: if set != '': util.pread2(['ipset', '-F', set]) util.pread2(['ipset', '-X', set]) except: util.SMlog("Failed to destroy ipsets for %" % vm_name) return 'true' @echo def destroy_ebtables_rules(vm_chain): delcmd = "ebtables-save | grep " + vm_chain + " | sed 's/-A/-D/'" delcmds = util.pread2(['/bin/bash', '-c', delcmd]).split('\n') delcmds.pop() for cmd in delcmds: try: dc = cmd.split(' ') dc.insert(0, 'ebtables') util.pread2(dc) except: util.SMlog("Ignoring failure to delete ebtables rules for vm " + vm_chain) try: util.pread2(['ebtables', '-F', vm_chain]) util.pread2(['ebtables', '-X', vm_chain]) except: util.SMlog("Ignoring failure to delete ebtables chain for vm " + vm_chain) @echo def destroy_arptables_rules(vm_chain): delcmd = "arptables -vL FORWARD | grep " + vm_chain + " | sed 's/-i any//' | sed 's/-o any//' | awk '{print $1,$2,$3,$4}' " delcmds = util.pread2(['/bin/bash', '-c', delcmd]).split('\n') delcmds.pop() for cmd in delcmds: try: dc = cmd.split(' ') dc.insert(0, 'arptables') dc.insert(1, '-D') dc.insert(2, 'FORWARD') util.pread2(dc) except: util.SMlog("Ignoring failure to delete arptables rules for vm " + vm_chain) try: util.pread2(['arptables', '-F', vm_chain]) util.pread2(['arptables', '-X', vm_chain]) except: util.SMlog("Ignoring failure to delete arptables chain for vm " + vm_chain) @echo def default_ebtables_antispoof_rules(vm_chain, vifs, vm_ip, vm_mac): if vm_mac == 'ff:ff:ff:ff:ff:ff': util.SMlog("Ignoring since mac address is not valid") return 'true' try: util.pread2(['ebtables', '-N', vm_chain]) except: try: util.pread2(['ebtables', '-F', vm_chain]) except: util.SMlog("Failed to create ebtables antispoof chain, skipping") return 'true' # note all rules for packets into the bridge (-i) precede all output rules (-o) # always start after the first rule in the FORWARD chain that jumps to DEFAULT_EBTABLES chain try: for vif in vifs: util.pread2(['ebtables', '-I', 'FORWARD', '2', '-i', vif, '-j', vm_chain]) util.pread2(['ebtables', '-A', 'FORWARD', '-o', vif, '-j', vm_chain]) except: util.SMlog("Failed to program default ebtables FORWARD rules for %s" % vm_chain) return 'false' try: for vif in vifs: # only allow source mac that belongs to the vm util.pread2(['ebtables', '-A', vm_chain, '-i', vif, '-s', '!', vm_mac, '-j', 'DROP']) # do not allow fake dhcp responses util.pread2(['ebtables', '-A', vm_chain, '-i', vif, '-p', 'IPv4', '--ip-proto', 'udp', '--ip-dport', '68', '-j', 'DROP']) # do not allow snooping of dhcp requests util.pread2(['ebtables', '-A', vm_chain, '-o', vif, '-p', 'IPv4', '--ip-proto', 'udp', '--ip-dport', '67', '-j', 'DROP']) except: util.SMlog("Failed to program default ebtables antispoof rules for %s" % vm_chain) return 'false' return 'true' @echo def default_arp_antispoof(vm_chain, vifs, vm_ip, vm_mac): if vm_mac == 'ff:ff:ff:ff:ff:ff': util.SMlog("Ignoring since mac address is not valid") return 'true' try: util.pread2(['arptables', '-N', vm_chain]) except: try: util.pread2(['arptables', '-F', vm_chain]) except: util.SMlog("Failed to create arptables rule, skipping") return 'true' # note all rules for packets into the bridge (-i) precede all output rules (-o) try: for vif in vifs: util.pread2(['arptables', '-I', 'FORWARD', '-i', vif, '-j', vm_chain]) util.pread2(['arptables', '-A', 'FORWARD', '-o', vif, '-j', vm_chain]) except: util.SMlog("Failed to program default arptables rules in FORWARD chain vm=" + vm_chain) return 'false' try: for vif in vifs: #accept arp replies into the bridge as long as the source mac and ips match the vm util.pread2(['arptables', '-A', vm_chain, '-i', vif, '--opcode', 'Reply', '--source-mac', vm_mac, '--source-ip', vm_ip, '-j', 'ACCEPT']) #accept any arp requests from this vm. In the future this can be restricted to deny attacks on hosts #also important to restrict source ip and src mac in these requests as they can be used to update arp tables on destination util.pread2(['arptables', '-A', vm_chain, '-i', vif, '--opcode', 'Request', '--source-mac', vm_mac, '--source-ip', vm_ip, '-j', 'RETURN']) #accept any arp requests to this vm as long as the request is for this vm's ip util.pread2(['arptables', '-A', vm_chain, '-o', vif, '--opcode', 'Request', '--destination-ip', vm_ip, '-j', 'ACCEPT']) #accept any arp replies to this vm as long as the mac and ip matches util.pread2(['arptables', '-A', vm_chain, '-o', vif, '--opcode', 'Reply', '--destination-mac', vm_mac, '--destination-ip', vm_ip, '-j', 'ACCEPT']) util.pread2(['arptables', '-A', vm_chain, '-j', 'DROP']) except: util.SMlog("Failed to program default arptables rules") return 'false' return 'true' @echo def default_network_rules_systemvm(session, args): vm_name = args.pop('vmName') try: vm = session.xenapi.VM.get_by_name_label(vm_name) if len(vm) != 1: return 'false' vm_rec = session.xenapi.VM.get_record(vm[0]) vm_vifs = vm_rec.get('VIFs') vifnums = [session.xenapi.VIF.get_record(vif).get('device') for vif in vm_vifs] domid = vm_rec.get('domid') except: util.SMlog("### Failed to get domid or vif list for vm ##" + vm_name) return 'false' if domid == '-1': util.SMlog("### Failed to get domid for vm (-1): " + vm_name) return 'false' vifs = ["vif" + domid + "." + v for v in vifnums] #vm_name = '-'.join(vm_name.split('-')[:-1]) vmchain = chain_name(vm_name) delete_rules_for_vm_in_bridge_firewall_chain(vm_name) try: util.pread2(['iptables', '-N', vmchain]) except: util.pread2(['iptables', '-F', vmchain]) allow_egress_traffic(session) for vif in vifs: try: util.pread2(['iptables', '-A', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', vif, '-j', vmchain]) util.pread2(['iptables', '-I', 'BRIDGE-FIREWALL', '2', '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', vif, '-j', vmchain]) util.pread2(['iptables', '-I', vmchain, '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', vif, '-j', 'RETURN']) except: util.SMlog("Failed to program default rules") return 'false' util.pread2(['iptables', '-A', vmchain, '-j', 'ACCEPT']) if write_rule_log_for_vm(vm_name, '-1', '_ignore_', domid, '_initial_', '-1') == False: util.SMlog("Failed to log default network rules for systemvm, ignoring") return 'true' @echo def default_network_rules(session, args): vm_name = args.pop('vmName') vm_ip = args.pop('vmIP') vm_id = args.pop('vmID') vm_mac = args.pop('vmMAC') try: vm = session.xenapi.VM.get_by_name_label(vm_name) if len(vm) != 1: util.SMlog("### Failed to get record for vm " + vm_name) return 'false' vm_rec = session.xenapi.VM.get_record(vm[0]) domid = vm_rec.get('domid') except: util.SMlog("### Failed to get domid for vm " + vm_name) return 'false' if domid == '-1': util.SMlog("### Failed to get domid for vm (-1): " + vm_name) return 'false' vif = "vif" + domid + ".0" tap = "tap" + domid + ".0" vifs = [vif] try: util.pread2(['ifconfig', tap]) vifs.append(tap) except: pass delete_rules_for_vm_in_bridge_firewall_chain(vm_name) vmchain = chain_name(vm_name) vmchain_egress = egress_chain_name(vm_name) vmchain_default = chain_name_def(vm_name) destroy_ebtables_rules(vmchain) try: util.pread2(['iptables', '-N', vmchain]) except: util.pread2(['iptables', '-F', vmchain]) try: util.pread2(['iptables', '-N', vmchain_egress]) except: util.pread2(['iptables', '-F', vmchain_egress]) try: util.pread2(['iptables', '-N', vmchain_default]) except: util.pread2(['iptables', '-F', vmchain_default]) try: for v in vifs: util.pread2(['iptables', '-A', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', v, '-j', vmchain_default]) util.pread2(['iptables', '-I', 'BRIDGE-FIREWALL', '2', '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '-j', vmchain_default]) util.pread2(['iptables', '-A', vmchain_default, '-m', 'state', '--state', 'RELATED,ESTABLISHED', '-j', 'ACCEPT']) #allow dhcp for v in vifs: util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '-p', 'udp', '--dport', '67', '--sport', '68', '-j', 'ACCEPT']) util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', v, '-p', 'udp', '--dport', '68', '--sport', '67', '-j', 'ACCEPT']) #don't let vm spoof its ip address for v in vifs: util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '--source', vm_ip,'-p', 'udp', '--dport', '53', '-j', 'RETURN']) util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '--source', '!', vm_ip, '-j', 'DROP']) util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', v, '--destination', '!', vm_ip, '-j', 'DROP']) util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '--source', vm_ip, '-j', vmchain_egress]) for v in vifs: util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', v, '-j', vmchain]) except: util.SMlog("Failed to program default rules for vm " + vm_name) return 'false' default_arp_antispoof(vmchain, vifs, vm_ip, vm_mac) default_ebtables_antispoof_rules(vmchain, vifs, vm_ip, vm_mac) if write_rule_log_for_vm(vm_name, vm_id, vm_ip, domid, '_initial_', '-1', vm_mac) == False: util.SMlog("Failed to log default network rules, ignoring") util.SMlog("Programmed default rules for vm " + vm_name) return 'true' @echo def check_domid_changed(session, vmName): curr_domid = '-1' try: vm = session.xenapi.VM.get_by_name_label(vmName) if len(vm) != 1: util.SMlog("### Could not get record for vm ## " + vmName) else: vm_rec = session.xenapi.VM.get_record(vm[0]) curr_domid = vm_rec.get('domid') except: util.SMlog("### Failed to get domid for vm ## " + vmName) logfilename = "/var/run/cloud/" + vmName +".log" if not os.path.exists(logfilename): return ['-1', curr_domid] lines = (line.rstrip() for line in open(logfilename)) [_vmName,_vmID,_vmIP,old_domid,_signature,_seqno, _vmMac] = ['_', '-1', '_', '-1', '_', '-1', 'ff:ff:ff:ff:ff:ff'] for line in lines: try: [_vmName,_vmID,_vmIP,old_domid,_signature,_seqno,_vmMac] = line.split(',') except ValueError,v: [_vmName,_vmID,_vmIP,old_domid,_signature,_seqno] = line.split(',') break return [curr_domid, old_domid] @echo def delete_rules_for_vm_in_bridge_firewall_chain(vmName): vm_name = vmName vmchain = chain_name_def(vm_name) delcmd = "iptables-save | grep '\-A BRIDGE-FIREWALL' | grep " + vmchain + " | sed 's/-A/-D/'" delcmds = util.pread2(['/bin/bash', '-c', delcmd]).split('\n') delcmds.pop() for cmd in delcmds: try: dc = cmd.split(' ') dc.insert(0, 'iptables') dc.pop() util.pread2(filter(None, dc)) except: util.SMlog("Ignoring failure to delete rules for vm " + vmName) @echo def network_rules_for_rebooted_vm(session, vmName): vm_name = vmName [curr_domid, old_domid] = check_domid_changed(session, vm_name) if curr_domid == old_domid: return True if old_domid == '-1': return True if curr_domid == '-1': return True util.SMlog("Found a rebooted VM -- reprogramming rules for " + vm_name) delete_rules_for_vm_in_bridge_firewall_chain(vm_name) if 1 in [ vm_name.startswith(c) for c in ['r-', 's-', 'v-', 'l-'] ]: default_network_rules_systemvm(session, {"vmName":vm_name}) return True vif = "vif" + curr_domid + ".0" tap = "tap" + curr_domid + ".0" vifs = [vif] try: util.pread2(['ifconfig', tap]) vifs.append(tap) except: pass vmchain = chain_name(vm_name) vmchain_default = chain_name_def(vm_name) for v in vifs: util.pread2(['iptables', '-A', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', v, '-j', vmchain_default]) util.pread2(['iptables', '-I', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '-j', vmchain_default]) #change antispoof rule in vmchain try: delcmd = "iptables-save | grep '\-A " + vmchain_default + "' | grep physdev-in | sed 's/-A/-D/'" delcmd2 = "iptables-save | grep '\-A " + vmchain_default + "' | grep physdev-out | sed 's/-A/-D/'" inscmd = "iptables-save | grep '\-A " + vmchain_default + "' | grep physdev-in | grep vif | sed -r 's/vif[0-9]+.0/" + vif + "/' | sed 's/-A/-I/'" inscmd2 = "iptables-save| grep '\-A " + vmchain_default + "' | grep physdev-in | grep tap | sed -r 's/tap[0-9]+.0/" + tap + "/' | sed 's/-A/-I/'" inscmd3 = "iptables-save | grep '\-A " + vmchain_default + "' | grep physdev-out | grep vif | sed -r 's/vif[0-9]+.0/" + vif + "/' | sed 's/-A/-I/'" inscmd4 = "iptables-save| grep '\-A " + vmchain_default + "' | grep physdev-out | grep tap | sed -r 's/tap[0-9]+.0/" + tap + "/' | sed 's/-A/-I/'" ipts = [] for cmd in [delcmd, delcmd2, inscmd, inscmd2, inscmd3, inscmd4]: cmds = util.pread2(['/bin/bash', '-c', cmd]).split('\n') cmds.pop() for c in cmds: ipt = c.split(' ') ipt.insert(0, 'iptables') ipt.pop() ipts.append(ipt) for ipt in ipts: try: util.pread2(filter(None,ipt)) except: util.SMlog("Failed to rewrite antispoofing rules for vm " + vm_name) except: util.SMlog("No rules found for vm " + vm_name) destroy_ebtables_rules(vmchain) destroy_arptables_rules(vmchain) [vm_ip, vm_mac] = get_vm_mac_ip_from_log(vmchain) default_arp_antispoof(vmchain, vifs, vm_ip, vm_mac) default_ebtables_antispoof_rules(vmchain, vifs, vm_ip, vm_mac) rewrite_rule_log_for_vm(vm_name, curr_domid) return True def rewrite_rule_log_for_vm(vm_name, new_domid): logfilename = "/var/run/cloud/" + vm_name +".log" if not os.path.exists(logfilename): return lines = (line.rstrip() for line in open(logfilename)) [_vmName,_vmID,_vmIP,_domID,_signature,_seqno,_vmMac] = ['_', '-1', '_', '-1', '_', '-1','ff:ff:ff:ff:ff:ff'] for line in lines: try: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno,_vmMac] = line.split(',') break except ValueError,v: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno] = line.split(',') write_rule_log_for_vm(_vmName, _vmID, _vmIP, new_domid, _signature, '-1', _vmMac) def get_rule_log_for_vm(session, vmName): vm_name = vmName; logfilename = "/var/run/cloud/" + vm_name +".log" if not os.path.exists(logfilename): return '' lines = (line.rstrip() for line in open(logfilename)) [_vmName,_vmID,_vmIP,_domID,_signature,_seqno,_vmMac] = ['_', '-1', '_', '-1', '_', '-1', 'ff:ff:ff:ff:ff:ff'] for line in lines: try: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno,_vmMac] = line.split(',') break except ValueError,v: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno] = line.split(',') return ','.join([_vmName, _vmID, _vmIP, _domID, _signature, _seqno]) @echo def get_vm_mac_ip_from_log(vm_name): [_vmName,_vmID,_vmIP,_domID,_signature,_seqno,_vmMac] = ['_', '-1', '0.0.0.0', '-1', '_', '-1','ff:ff:ff:ff:ff:ff'] logfilename = "/var/run/cloud/" + vm_name +".log" if not os.path.exists(logfilename): return ['_', '_'] lines = (line.rstrip() for line in open(logfilename)) for line in lines: try: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno,_vmMac] = line.split(',') break except ValueError,v: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno] = line.split(',') return [ _vmIP, _vmMac] @echo def get_rule_logs_for_vms(session, args): host_uuid = args.pop('host_uuid') try: thishost = session.xenapi.host.get_by_uuid(host_uuid) hostrec = session.xenapi.host.get_record(thishost) vms = hostrec.get('resident_VMs') except: util.SMlog("Failed to get host from uuid " + host_uuid) return ' ' result = [] try: for name in [session.xenapi.VM.get_name_label(x) for x in vms]: if 1 not in [ name.startswith(c) for c in ['r-', 's-', 'v-', 'i-', 'l-'] ]: continue network_rules_for_rebooted_vm(session, name) if name.startswith('i-'): log = get_rule_log_for_vm(session, name) result.append(log) except: util.SMlog("Failed to get rule logs, better luck next time!") return ";".join(result) @echo def cleanup_rules_for_dead_vms(session): try: vms = session.xenapi.VM.get_all() cleaned = 0 for vm_name in [session.xenapi.VM.get_name_label(x) for x in vms]: if 1 in [ vm_name.startswith(c) for c in ['r-', 'i-', 's-', 'v-', 'l-'] ]: vm = session.xenapi.VM.get_by_name_label(vm_name) if len(vm) != 1: continue vm_rec = session.xenapi.VM.get_record(vm[0]) state = vm_rec.get('power_state') if state != 'Running' and state != 'Paused': util.SMlog("vm " + vm_name + " is not running, cleaning up") destroy_network_rules_for_vm(session, {'vmName':vm_name}) cleaned = cleaned+1 util.SMlog("Cleaned up rules for " + str(cleaned) + " vms") except: util.SMlog("Failed to cleanup rules for dead vms!") @echo def cleanup_rules(session, args): instance = args.get('instance') if not instance: instance = 'VM' resident_vms = [] try: hostname = util.pread2(['/bin/bash', '-c', 'hostname']).split('\n') if len(hostname) < 1: raise Exception('Could not find hostname of this host') thishost = session.xenapi.host.get_by_name_label(hostname[0]) if len(thishost) < 1: raise Exception("Could not find host record from hostname %s of this host"%hostname[0]) hostrec = session.xenapi.host.get_record(thishost[0]) vms = hostrec.get('resident_VMs') resident_vms = [session.xenapi.VM.get_name_label(x) for x in vms] util.SMlog('cleanup_rules: found %s resident vms on this host %s' % (len(resident_vms)-1, hostname[0])) chainscmd = "iptables-save | grep '^:' | awk '{print $1}' | cut -d':' -f2 | sed 's/-def/-%s/'| sed 's/-eg//' | sort|uniq" % instance chains = util.pread2(['/bin/bash', '-c', chainscmd]).split('\n') vmchains = [ch for ch in chains if 1 in [ ch.startswith(c) for c in ['r-', 'i-', 's-', 'v-', 'l-']]] util.SMlog('cleanup_rules: found %s iptables chains for vms on this host %s' % (len(vmchains), hostname[0])) cleaned = 0 cleanup = [] for chain in vmchains: vm = session.xenapi.VM.get_by_name_label(chain) if len(vm) != 1: vm = session.xenapi.VM.get_by_name_label(chain + "-untagged") if len(vm) != 1: util.SMlog("chain " + chain + " does not correspond to a vm, cleaning up") cleanup.append(chain) continue if chain not in resident_vms: util.SMlog("vm " + chain + " is not running, cleaning up") cleanup.append(chain) for vm_name in cleanup: destroy_network_rules_for_vm(session, {'vmName':vm_name}) util.SMlog("Cleaned up rules for " + str(len(cleanup)) + " chains") return str(len(cleanup)) except Exception, ex: util.SMlog("Failed to cleanup rules, reason= " + str(ex)) return '-1'; @echo def check_rule_log_for_vm(vmName, vmID, vmIP, domID, signature, seqno): vm_name = vmName; logfilename = "/var/run/cloud/" + vm_name +".log" if not os.path.exists(logfilename): util.SMlog("Failed to find logfile %s" %logfilename) return [True, True, True] lines = (line.rstrip() for line in open(logfilename)) [_vmName,_vmID,_vmIP,_domID,_signature,_seqno,_vmMac] = ['_', '-1', '_', '-1', '_', '-1', 'ff:ff:ff:ff:ff:ff'] try: for line in lines: try: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno, _vmMac] = line.split(',') except ValueError,v: [_vmName,_vmID,_vmIP,_domID,_signature,_seqno] = line.split(',') break except: util.SMlog("Failed to parse log file for vm " + vmName) remove_rule_log_for_vm(vmName) return [True, True, True] reprogramDefault = False if (domID != _domID) or (vmID != _vmID) or (vmIP != _vmIP): util.SMlog("Change in default info set of vm %s" % vmName) return [True, True, True] else: util.SMlog("No change in default info set of vm %s" % vmName) reprogramChain = False rewriteLog = True if (int(seqno) > int(_seqno)): if (_signature != signature): reprogramChain = True util.SMlog("Seqno increased from %s to %s: reprogamming "\ "ingress rules for vm %s" % (_seqno, seqno, vmName)) else: util.SMlog("Seqno increased from %s to %s: but no change "\ "in signature for vm: skip programming ingress "\ "rules %s" % (_seqno, seqno, vmName)) elif (int(seqno) < int(_seqno)): util.SMlog("Seqno decreased from %s to %s: ignoring these "\ "ingress rules for vm %s" % (_seqno, seqno, vmName)) rewriteLog = False elif (signature != _signature): util.SMlog("Seqno %s stayed the same but signature changed from "\ "%s to %s for vm %s" % (seqno, _signature, signature, vmName)) rewriteLog = True reprogramChain = True else: util.SMlog("Seqno and signature stayed the same: %s : ignoring these "\ "ingress rules for vm %s" % (seqno, vmName)) rewriteLog = False return [reprogramDefault, reprogramChain, rewriteLog] @echo def write_rule_log_for_vm(vmName, vmID, vmIP, domID, signature, seqno, vmMac='ff:ff:ff:ff:ff:ff'): vm_name = vmName logfilename = "/var/run/cloud/" + vm_name +".log" util.SMlog("Writing log to " + logfilename) logf = open(logfilename, 'w') output = ','.join([vmName, vmID, vmIP, domID, signature, seqno, vmMac]) result = True try: logf.write(output) logf.write('\n') except: util.SMlog("Failed to write to rule log file " + logfilename) result = False logf.close() return result @echo def remove_rule_log_for_vm(vmName): vm_name = vmName logfilename = "/var/run/cloud/" + vm_name +".log" result = True try: os.remove(logfilename) except: util.SMlog("Failed to delete rule log file " + logfilename) result = False return result @echo def inflate_rules (zipped): return zlib.decompress(base64.b64decode(zipped)) @echo def cache_ipset_keyword(): tmpname = 'ipsetqzvxtmp' try: util.pread2(['/bin/bash', '-c', 'ipset -N ' + tmpname + ' iptreemap']) except: util.pread2(['/bin/bash', '-c', 'ipset -F ' + tmpname]) try: util.pread2(['/bin/bash', '-c', 'iptables -A INPUT -m set --set ' + tmpname + ' src' + ' -j ACCEPT']) util.pread2(['/bin/bash', '-c', 'iptables -D INPUT -m set --set ' + tmpname + ' src' + ' -j ACCEPT']) keyword = 'set' except: keyword = 'match-set' try: util.pread2(['/bin/bash', '-c', 'ipset -X ' + tmpname]) except: pass cachefile = "/var/cache/cloud/ipset.keyword" util.SMlog("Writing ipset keyword to " + cachefile) cachef = open(cachefile, 'w') try: cachef.write(keyword) cachef.write('\n') except: util.SMlog("Failed to write to cache file " + cachef) cachef.close() return keyword @echo def get_ipset_keyword(): cachefile = "/var/cache/cloud/ipset.keyword" keyword = 'match-set' if not os.path.exists(cachefile): util.SMlog("Failed to find ipset keyword cachefile %s" %cachefile) keyword = cache_ipset_keyword() else: lines = (line.rstrip() for line in open(cachefile)) for line in lines: keyword = line break return keyword @echo def network_rules(session, args): try: vm_name = args.get('vmName') vm_ip = args.get('vmIP') vm_id = args.get('vmID') vm_mac = args.get('vmMAC') signature = args.pop('signature') seqno = args.pop('seqno') deflated = 'false' if 'deflated' in args: deflated = args.pop('deflated') try: vm = session.xenapi.VM.get_by_name_label(vm_name) if len(vm) != 1: util.SMlog("### Could not get record for vm ## " + vm_name) return 'false' vm_rec = session.xenapi.VM.get_record(vm[0]) domid = vm_rec.get('domid') except: util.SMlog("### Failed to get domid for vm ## " + vm_name) return 'false' if domid == '-1': util.SMlog("### Failed to get domid for vm (-1): " + vm_name) return 'false' vif = "vif" + domid + ".0" tap = "tap" + domid + ".0" vifs = [vif] try: util.pread2(['ifconfig', tap]) vifs.append(tap) except: pass reason = 'seqno_change_or_sig_change' [reprogramDefault, reprogramChain, rewriteLog] = \ check_rule_log_for_vm (vm_name, vm_id, vm_ip, domid, signature, seqno) if not reprogramDefault and not reprogramChain: util.SMlog("No changes detected between current state and received state") reason = 'seqno_same_sig_same' if rewriteLog: reason = 'seqno_increased_sig_same' write_rule_log_for_vm(vm_name, vm_id, vm_ip, domid, signature, seqno, vm_mac) util.SMlog("Programming network rules for vm %s seqno=%s signature=%s guestIp=%s,"\ " do nothing, reason=%s" % (vm_name, seqno, signature, vm_ip, reason)) return 'true' if not reprogramChain: util.SMlog("###Not programming any ingress rules since no changes detected?") return 'true' if reprogramDefault: util.SMlog("Change detected in vmId or vmIp or domId, resetting default rules") default_network_rules(session, args) reason = 'domid_change' rules = args.pop('rules') if deflated.lower() == 'true': rules = inflate_rules (rules) keyword = '--' + get_ipset_keyword() lines = rules.split(' ') util.SMlog("Programming network rules for vm %s seqno=%s numrules=%s signature=%s guestIp=%s,"\ " update iptables, reason=%s" % (vm_name, seqno, len(lines), signature, vm_ip, reason)) cmds = [] egressrules = 0 for line in lines: tokens = line.split(':') if len(tokens) != 5: continue type = tokens[0] protocol = tokens[1] start = tokens[2] end = tokens[3] cidrs = tokens.pop(); ips = cidrs.split(",") ips.pop() allow_any = False if type == 'E': vmchain = egress_chain_name(vm_name) action = "RETURN" direction = "dst" egressrules = egressrules + 1 else: vmchain = chain_name(vm_name) action = "ACCEPT" direction = "src" if '0.0.0.0/0' in ips: i = ips.index('0.0.0.0/0') del ips[i] allow_any = True range = start + ":" + end if ips: ipsetname = vmchain + "_" + protocol + "_" + start + "_" + end if start == "-1": ipsetname = vmchain + "_" + protocol + "_any" if ipset(ipsetname, protocol, start, end, ips) == False: util.SMlog(" failed to create ipset for rule " + str(tokens)) if protocol == 'all': iptables = ['iptables', '-I', vmchain, '-m', 'state', '--state', 'NEW', '-m', 'set', keyword, ipsetname, direction, '-j', action] elif protocol != 'icmp': iptables = ['iptables', '-I', vmchain, '-p', protocol, '-m', protocol, '--dport', range, '-m', 'state', '--state', 'NEW', '-m', 'set', keyword, ipsetname, direction, '-j', action] else: range = start + "/" + end if start == "-1": range = "any" iptables = ['iptables', '-I', vmchain, '-p', 'icmp', '--icmp-type', range, '-m', 'set', keyword, ipsetname, direction, '-j', action] cmds.append(iptables) util.SMlog(iptables) if allow_any and protocol != 'all': if protocol != 'icmp': iptables = ['iptables', '-I', vmchain, '-p', protocol, '-m', protocol, '--dport', range, '-m', 'state', '--state', 'NEW', '-j', action] else: range = start + "/" + end if start == "-1": range = "any" iptables = ['iptables', '-I', vmchain, '-p', 'icmp', '--icmp-type', range, '-j', action] cmds.append(iptables) util.SMlog(iptables) vmchain = chain_name(vm_name) util.pread2(['iptables', '-F', vmchain]) egress_vmchain = egress_chain_name(vm_name) util.pread2(['iptables', '-F', egress_vmchain]) for cmd in cmds: util.pread2(cmd) if egressrules == 0 : util.pread2(['iptables', '-A', egress_vmchain, '-j', 'RETURN']) else: util.pread2(['iptables', '-A', egress_vmchain, '-j', 'DROP']) util.pread2(['iptables', '-A', vmchain, '-j', 'DROP']) if write_rule_log_for_vm(vm_name, vm_id, vm_ip, domid, signature, seqno, vm_mac) == False: return 'false' return 'true' except: util.SMlog("Failed to network rule !") @echo def bumpUpPriority(session, args): sargs = args['args'] cmd = sargs.split(' ') cmd.insert(0, "/opt/xensource/bin/bumpUpPriority.sh") cmd.insert(0, "/bin/bash") try: txt = util.pread2(cmd) txt = 'success' except: util.SMlog("bump up priority fail! ") txt = '' return txt if __name__ == "__main__": XenAPIPlugin.dispatch({"pingtest": pingtest, "setup_iscsi":setup_iscsi, "gethostvmstats": gethostvmstats, "getvncport": getvncport, "getgateway": getgateway, "preparemigration": preparemigration, "setIptables": setIptables, "pingdomr": pingdomr, "pingxenserver": pingxenserver, "vm_data": vm_data, "savePassword": savePassword, "saveDhcpEntry": saveDhcpEntry, "setFirewallRule": setFirewallRule, "routerProxy": routerProxy, "setLoadBalancerRule": setLoadBalancerRule, "createFile": createFile, "deleteFile": deleteFile, "network_rules":network_rules, "can_bridge_firewall":can_bridge_firewall, "default_network_rules":default_network_rules, "destroy_network_rules_for_vm":destroy_network_rules_for_vm, "default_network_rules_systemvm":default_network_rules_systemvm, "get_rule_logs_for_vms":get_rule_logs_for_vms, "setLinkLocalIP":setLinkLocalIP, "lt2p_vpn":lt2p_vpn, "cleanup_rules":cleanup_rules, "bumpUpPriority":bumpUpPriority, "kill_copy_process":kill_copy_process})