| #!/usr/bin/python |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| # Version @VERSION@ |
| # |
| # A plugin for executing script needed by vmops cloud |
| |
| import os, sys, time |
| import XenAPIPlugin |
| if os.path.exists("/opt/xensource/sm"): |
| sys.path.extend(["/opt/xensource/sm/", "/usr/local/sbin/", "/sbin/"]) |
| if os.path.exists("/usr/lib/xcp/sm"): |
| sys.path.extend(["/usr/lib/xcp/sm/", "/usr/local/sbin/", "/sbin/"]) |
| import base64 |
| import socket |
| import stat |
| import tempfile |
| import util |
| import subprocess |
| import zlib |
| import cloudstack_pluginlib as lib |
| import logging |
| from util import CommandException |
| |
| lib.setup_logging("/var/log/cloud/cloud.log") |
| |
| def echo(fn): |
| def wrapped(*v, **k): |
| name = fn.__name__ |
| #command string is logged in SMlog, so method enter/exit logging into SMlog will help for debugging |
| util.SMlog("#### CLOUD enter %s ####" % name ) |
| res = fn(*v, **k) |
| util.SMlog("#### CLOUD exit %s ####" % name ) |
| return res |
| return wrapped |
| |
| @echo |
| def add_to_VCPUs_params_live(session, args): |
| key = args['key'] |
| value = args['value'] |
| vmname = args['vmname'] |
| try: |
| cmd = ["bash", "/opt/cloud/bin/add_to_vcpus_params_live.sh", vmname, key, value] |
| txt = util.pread2(cmd) |
| except: |
| return 'false' |
| return 'true' |
| |
| @echo |
| def setup_iscsi(session, args): |
| uuid=args['uuid'] |
| try: |
| cmd = ["bash", "/opt/cloud/bin/setup_iscsi.sh", uuid] |
| txt = util.pread2(cmd) |
| except: |
| txt = '' |
| return txt |
| |
| |
| @echo |
| def preparemigration(session, args): |
| uuid = args['uuid'] |
| try: |
| cmd = ["/opt/cloud/bin/make_migratable.sh", uuid] |
| util.pread2(cmd) |
| txt = 'success' |
| except: |
| logging.debug("Catch prepare migration exception" ) |
| txt = '' |
| |
| return txt |
| |
| @echo |
| def setIptables(session, args): |
| try: |
| cmd = ["/bin/bash", "/opt/cloud/bin/setupxenserver.sh"] |
| txt = util.pread2(cmd) |
| txt = 'success' |
| except: |
| logging.debug(" 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/cloud/bin/kill_copy_process.sh", namelabel] |
| txt = util.pread2(cmd) |
| except: |
| txt = 'false' |
| return txt |
| |
| @echo |
| def pingxenserver(session, args): |
| txt = 'success' |
| return txt |
| |
| def pingtest(session, args): |
| sargs = args['args'] |
| cmd = sargs.split(' ') |
| cmd.insert(0, "/opt/cloud/bin/pingtest.sh") |
| cmd.insert(0, "/bin/bash") |
| try: |
| txt = util.pread2(cmd) |
| txt = 'success' |
| except: |
| logging.debug(" pingtest 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().strip() == "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 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: |
| logging.debug(" failed to create HA proxy cfg file ") |
| txt = '' |
| |
| return txt |
| |
| @echo |
| def secureCopyToHost(session, args): |
| host_filepath = args['hostfilepath'] |
| src_ip = args['srcip'] |
| src_filepath = args['srcfilepath'] |
| src_target = "root@" + src_ip + ":" + src_filepath |
| # Make any directories as needed |
| if not os.path.isdir(host_filepath): |
| try: |
| os.makedirs(host_filepath) |
| except OSError, (errno, strerror): |
| if not os.path.isdir(host_filepath): |
| errMsg = "OSError while creating " + host_filepath + " with errno: " + str(errno) + " and strerr: " + strerror |
| logging.debug(errMsg) |
| return "fail# Cannot create the directory to copy file to " + host_filepath |
| |
| # Copy file to created directory |
| txt="" |
| try: |
| txt = util.pread2(['scp','-P','3922','-q','-o','StrictHostKeyChecking=no','-i','/root/.ssh/id_rsa.cloud', src_target, host_filepath]) |
| util.pread2(['chmod', 'a+r', os.path.join(host_filepath, os.path.basename(src_filepath))]) |
| txt = 'success#' + txt |
| except: |
| logging.error("failed to scp source target " + src_target + " to host at file path " + host_filepath) |
| txt = 'fail#' + txt |
| return txt |
| |
| @echo |
| def createFileInDomr(session, args): |
| src_filepath = args['srcfilepath'] |
| dst_path = args['dstfilepath'] |
| domrip = args['domrip'] |
| cleanup = 'true' if 'cleanup' not in args else args['cleanup'] |
| txt="" |
| try: |
| target = "root@" + domrip + ":" + dst_path |
| txt = util.pread2(['scp','-P','3922','-q','-o','StrictHostKeyChecking=no','-i','/root/.ssh/id_rsa.cloud',src_filepath, target]) |
| if cleanup == 'true' or not cleanup: |
| util.pread2(['rm',src_filepath]) |
| txt = 'succ#' + txt |
| except: |
| logging.debug("failed to copy file " + src_filepath + " from host to VR with ip " + domrip) |
| txt = 'fail#' + txt |
| return txt |
| |
| @echo |
| def runPatchScriptInDomr(session, args): |
| domrip = args['domrip'] |
| txt="" |
| try: |
| target = "root@" + domrip |
| txt = util.pread2(['ssh','-p','3922','-i','/root/.ssh/id_rsa.cloud', target, "/bin/bash","/var/cache/cloud/patch-sysvms.sh"]) |
| txt = 'succ#' + txt |
| except: |
| logging.debug("failed to run patch script in systemVM with IP: " + domrip) |
| txt = 'fail#' + 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: |
| logging.debug(" failed to remove HA proxy cfg file ") |
| txt = '' |
| |
| return txt |
| |
| #using all the iptables chain names length to 24 because cleanup_rules groups the vm chain excluding -def,-eg |
| #to avoid multiple iptables chains for single vm, there using length 24 |
| 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]) |
| if len(vm_name) > 25: |
| vm_name = vm_name[0:24] |
| return vm_name |
| |
| def chain_name_def(vm_name): |
| #iptables chain length max is 29 chars |
| if len(vm_name) > 25: |
| vm_name = vm_name[0:24] |
| |
| if vm_name.startswith('i-'): |
| if vm_name.endswith('untagged'): |
| return '-'.join(vm_name.split('-')[:-1]) + "-def" |
| return vm_name + "-def" |
| |
| if len(vm_name) > 28: |
| vm_name = vm_name[0:27] |
| return vm_name |
| |
| def egress_chain_name(vm_name): |
| #iptables chain length max is 29 chars |
| name = chain_name(vm_name) |
| name = name+"-eg" |
| return name |
| |
| #chain name length is 14 because it has protocol and ports appends |
| def chain_name_ipset(vm_name): |
| if vm_name.startswith('i-') or vm_name.startswith('r-'): |
| if vm_name.endswith('untagged'): |
| return ''.join(vm_name.split('')[:-1]) |
| if len(vm_name) > 14: |
| vm_name = vm_name[0:13] |
| return vm_name |
| |
| def egress_chain_name_ipset(vm_name): |
| name = chain_name_ipset(vm_name) + "-e" |
| return name |
| |
| def ingress_chain_name_ipset(vm_name): |
| name = chain_name_ipset(vm_name) |
| return name |
| |
| @echo |
| def can_bridge_firewall(session, args): |
| try: |
| util.pread2(['ebtables', '-V']) |
| util.pread2(['ipset', '-V']) |
| cmd = ['cat', '/etc/xensource/network.conf'] |
| result = util.pread2(cmd) |
| if result.lower().strip() != "bridge": |
| return 'false' |
| |
| except: |
| return 'false' |
| |
| 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: |
| logging.debug('Chain BRIDGE-FIREWALL already exists') |
| |
| try: |
| util.pread2(['iptables', '-N', 'BRIDGE-DEFAULT-FIREWALL']) |
| util.pread2(['iptables', '-A', 'BRIDGE-DEFAULT-FIREWALL', '-m', 'state', '--state', 'RELATED,ESTABLISHED', '-j', 'ACCEPT']) |
| util.pread2(['iptables', '-A', 'BRIDGE-DEFAULT-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '-p', 'udp', '--dport', '67', '--sport', '68', '-j', 'ACCEPT']) |
| util.pread2(['iptables', '-A', 'BRIDGE-DEFAULT-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '-p', 'udp', '--dport', '68', '--sport', '67', '-j', 'ACCEPT']) |
| util.pread2(['iptables', '-I', 'BRIDGE-FIREWALL', '-j', 'BRIDGE-DEFAULT-FIREWALL']) |
| util.pread2(['iptables', '-D', 'BRIDGE-FIREWALL', '-m', 'state', '--state', 'RELATED,ESTABLISHED', '-j', 'ACCEPT']) |
| util.pread2(['iptables', '-D', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '-p', 'udp', '--dport', '67', '--sport', '68', '-j', 'ACCEPT']) |
| util.pread2(['iptables', '-D', 'BRIDGE-FIREWALL', '-m', 'physdev', '--physdev-is-bridged', '-p', 'udp', '--dport', '68', '--sport', '67', '-j', 'ACCEPT']) |
| except: |
| logging.debug('Chain BRIDGE-DEFAULT-FIREWALL already exists') |
| |
| 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', '-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', 'IPv4', '--ip-dst', '255.255.255.255', '--ip-proto', 'udp', '--ip-dport', '68', '-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: |
| logging.debug('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) |
| dev = pif_rec.get('device') |
| devs.append(dev + "+") |
| 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: |
| logging.debug("Failed to add FORWARD rule through to %s" % d) |
| return 'false' |
| return 'true' |
| |
| def getIpsetType(): |
| try: |
| out = util.pread2(['/bin/bash', '-c', "ipset -v | awk '{print $5}'"]) |
| out.replace(".","") |
| if int(out) < 6: |
| return 'iptreemap' |
| else: |
| return 'nethash' |
| except: |
| return 'iptreemap' |
| |
| def ipset(ipsetname, proto, start, end, cidrs): |
| type = getIpsetType() |
| try: |
| util.pread2(['ipset', '-N', ipsetname, type]) |
| except: |
| logging.debug("ipset chain already exists: " + ipsetname) |
| |
| result = True |
| ipsettmp = ''.join(''.join(ipsetname.split('-')).split('_')) + str(int(time.time()) % 1000) |
| |
| try: |
| util.pread2(['ipset', '-N', ipsettmp, type]) |
| except: |
| logging.debug("Failed to create temp ipset, reusing old name= " + ipsettmp) |
| try: |
| util.pread2(['ipset', '-F', ipsettmp]) |
| except: |
| logging.debug("Failed to clear old temp ipset name=" + ipsettmp) |
| return False |
| try: |
| for cidr in cidrs: |
| try: |
| util.pread2(['ipset', '-A', ipsettmp, cidr]) |
| except CommandException, cex: |
| logging.debug("ipset cidr add failed due to: " + str(cex.reason)) |
| if cex.reason.rfind('already in set') == -1: |
| raise |
| except: |
| logging.debug("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: |
| logging.debug("Failed to swap ipset, trying to delete and swap ipset: " + ipsetname) |
| # the old ipset entry could be of iphash type, try to delete and recreate |
| try: |
| util.pread2(['ipset', '-X', ipsetname]) |
| util.pread2(['ipset', '-N', ipsetname, type]) |
| util.pread2(['ipset', '-W', ipsettmp, ipsetname]) |
| except: |
| logging.debug("Failed to swap ipset " + ipsetname) |
| result = False |
| logging.debug("Succeeded in re-initializing and swapping ipset") |
| |
| try: |
| util.pread2(['ipset', '-F', ipsettmp]) |
| util.pread2(['ipset', '-X', ipsettmp]) |
| except: |
| # if the temporary name clashes next time we'll just reuse it |
| logging.debug("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: |
| logging.debug("Ignoring failure to delete chain " + vmchain_default) |
| |
| destroy_ebtables_rules(vmchain) |
| destroy_arptables_rules(vmchain) |
| |
| try: |
| util.pread2(['iptables', '-F', vmchain]) |
| util.pread2(['iptables', '-X', vmchain]) |
| except: |
| logging.debug("Ignoring failure to delete ingress chain " + vmchain) |
| |
| |
| try: |
| util.pread2(['iptables', '-F', vmchain_egress]) |
| util.pread2(['iptables', '-X', vmchain_egress]) |
| except: |
| logging.debug("Ignoring failure to delete egress chain " + vmchain_egress) |
| |
| remove_rule_log_for_vm(vm_name) |
| remove_secip_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 '%s' | grep -e '^-N' -e '^create' | awk '{print $2}'" % vmchain |
| ipset_names = filter(None, util.pread2(['/bin/bash', '-c', setscmd]).split('\n')) |
| for ipset_name in ipset_names: |
| if not ipset_name: |
| continue |
| util.pread2(['ipset', '-F', ipset_name]) |
| util.pread2(['ipset', '-X', ipset_name]) |
| except: |
| logging.debug("Failed to destroy ipsets for %" % vm_name) |
| |
| return 'true' |
| |
| @echo |
| def destroy_ebtables_rules(vm_chain): |
| delcmd = "ebtables-save | grep '%s' | sed 's/-A/-D/'" % vm_chain |
| delcmds = util.pread2(['/bin/bash', '-c', delcmd]).split('\n') |
| for cmd in filter(None, delcmds): |
| try: |
| dc = 'ebtables ' + cmd |
| util.pread2(filter(None, dc.split(' '))) |
| except: |
| logging.debug("Ignoring failure to delete ebtables rules for vm " + vm_chain) |
| try: |
| util.pread2(['ebtables', '-F', vm_chain]) |
| util.pread2(['ebtables', '-X', vm_chain]) |
| except: |
| logging.debug("Ignoring failure to delete ebtables chain for vm " + vm_chain) |
| |
| @echo |
| def destroy_arptables_rules(vm_chain): |
| delcmd = "arptables -vL FORWARD | grep '%s' | sed 's/-i any//' | sed 's/-o any//' | awk '{print $1,$2,$3,$4}' " % vm_chain |
| delcmds = util.pread2(['/bin/bash', '-c', delcmd]).split('\n') |
| for cmd in filter(None, delcmds): |
| try: |
| dc = 'arptables -D FORWARD ' + cmd |
| util.pread2(filter(None, dc.split(' '))) |
| except: |
| logging.debug("Ignoring failure to delete arptables rules for vm " + vm_chain) |
| |
| try: |
| util.pread2(['arptables', '-F', vm_chain]) |
| util.pread2(['arptables', '-X', vm_chain]) |
| except: |
| logging.debug("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': |
| logging.debug("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: |
| logging.debug("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: |
| logging.debug("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 |
| try: |
| util.pread2(['ebtables', '-t', 'nat', '-I', 'PREROUTING', '-i', vif, '-s', '!' , vm_mac, '-j', 'DROP']) |
| except: |
| 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: |
| logging.debug("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': |
| logging.debug("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: |
| logging.debug("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: |
| logging.debug("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: |
| logging.debug("Failed to program default arptables rules") |
| return 'false' |
| |
| return 'true' |
| |
| |
| @echo |
| def network_rules_vmSecondaryIp(session, args): |
| vm_name = args.pop('vmName') |
| vm_mac = args.pop('vmMac') |
| ip_secondary = args.pop('vmSecIp') |
| action = args.pop('action') |
| logging.debug("vmMac = "+ vm_mac) |
| logging.debug("vmName = "+ vm_name) |
| #action = "-A" |
| logging.debug("action = "+ action) |
| 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: |
| logging.debug("### Failed to get domid or vif list for vm ##" + vm_name) |
| return 'false' |
| |
| if domid == '-1': |
| logging.debug("### 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) |
| add_to_ipset(vmchain, [ip_secondary], action) |
| |
| #add arptables rules for the secondary ip |
| arp_rules_vmip(vmchain, vifs, [ip_secondary], vm_mac, action) |
| |
| return 'true' |
| |
| @echo |
| def default_network_rules_systemvm(session, args): |
| try: |
| util.pread2(['/bin/bash', '-c', 'iptables -n -L FORWARD | grep BRIDGE-FIREWALL']) |
| except: |
| can_bridge_firewall(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: |
| logging.debug("### Failed to get domid or vif list for vm ##" + vm_name) |
| return 'false' |
| |
| if domid == '-1': |
| logging.debug("### 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]) |
| |
| 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: |
| logging.debug("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: |
| logging.debug("Failed to log default network rules for systemvm, ignoring") |
| return 'true' |
| |
| @echo |
| def create_ipset_forvm (ipsetname): |
| result = True |
| type = getIpsetType() |
| try: |
| logging.debug("Creating ipset chain .... " + ipsetname) |
| util.pread2(['ipset', '-F', ipsetname]) |
| util.pread2(['ipset', '-X', ipsetname]) |
| util.pread2(['ipset', '-N', ipsetname, type]) |
| except: |
| logging.debug("ipset chain not exists creating.... " + ipsetname) |
| util.pread2(['ipset', '-N', ipsetname, type]) |
| |
| return result |
| |
| @echo |
| def add_to_ipset(ipsetname, ips, action): |
| result = True |
| for ip in ips: |
| try: |
| logging.debug("vm ip " + ip) |
| util.pread2(['ipset', action, ipsetname, ip]) |
| except: |
| logging.debug("vm ip already in ip set" + ip) |
| continue |
| |
| return result |
| |
| @echo |
| def arp_rules_vmip (vm_chain, vifs, ips, vm_mac, action): |
| try: |
| if action == "-A": |
| action = "-I" |
| for vif in vifs: |
| for vm_ip in ips: |
| #accept any arp requests to this vm as long as the request is for this vm's ip |
| util.pread2(['arptables', action, 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', action, vm_chain, '-o', vif, '--opcode', 'Reply', '--destination-mac', vm_mac, '--destination-ip', vm_ip, '-j', 'ACCEPT']) |
| #accept arp replies into the bridge as long as the source mac and ips match the vm |
| util.pread2(['arptables', action, 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', action, vm_chain, '-i', vif, '--opcode', 'Request', '--source-mac', vm_mac, '--source-ip', vm_ip, '-j', 'RETURN']) |
| except: |
| logging.debug("Failed to program arptables rules for ip") |
| return 'false' |
| |
| 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') |
| sec_ips = args.pop("secIps") |
| action = "-A" |
| |
| try: |
| vm = session.xenapi.VM.get_by_name_label(vm_name) |
| if len(vm) != 1: |
| logging.debug("### 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: |
| logging.debug("### Failed to get domid for vm " + vm_name) |
| return 'false' |
| if domid == '-1': |
| logging.debug("### 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]) |
| |
| vmipset = vm_name |
| if len(vmipset) > 28: |
| vmipset = vmipset[0:27] |
| #create ipset and add vm ips to that ip set |
| if create_ipset_forvm(vmipset) == False: |
| logging.debug(" failed to create ipset for rule " + str(tokens)) |
| return 'false' |
| |
| #add primary nic ip to ipset |
| if add_to_ipset(vmipset, [vm_ip], action ) == False: |
| logging.debug(" failed to add vm " + vm_ip + " ip to set ") |
| return 'false' |
| |
| #add secondary nic ips to ipset |
| secIpSet = "1" |
| ips = sec_ips.split(';') |
| ips.pop() |
| if ips[0] == "0": |
| secIpSet = "0"; |
| |
| if secIpSet == "1": |
| logging.debug("Adding ipset for secondary ips") |
| add_to_ipset(vmipset, ips, action) |
| if write_secip_log_for_vm(vm_name, sec_ips, vm_id) == False: |
| logging.debug("Failed to log default network rules, ignoring") |
| |
| keyword = '--' + get_ipset_keyword() |
| |
| 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]) |
| |
| #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, '-m', 'set', keyword, vmipset, 'src', '-p', 'udp', '--dport', '53', '-j', 'RETURN']) |
| util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '-m', 'set', '!', keyword, vmipset, 'src', '-j', 'DROP']) |
| util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', v, '-m', 'set', '!', keyword, vmipset, 'dst', '-j', 'DROP']) |
| util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-in', v, '-m', 'set', keyword, vmipset, 'src', '-j', vmchain_egress]) |
| util.pread2(['iptables', '-A', vmchain_default, '-m', 'physdev', '--physdev-is-bridged', '--physdev-out', v, '-j', vmchain]) |
| except: |
| logging.debug("Failed to program default rules for vm " + vm_name) |
| return 'false' |
| |
| default_arp_antispoof(vmchain, vifs, vm_ip, vm_mac) |
| #add default arp rules for secondary ips; |
| if secIpSet == "1": |
| logging.debug("Adding arp rules for sec ip") |
| arp_rules_vmip(vmchain, vifs, ips, vm_mac, action) |
| |
| 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: |
| logging.debug("Failed to log default network rules, ignoring") |
| |
| logging.debug("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: |
| logging.debug("### Could not get record for vm ## " + vmName) |
| else: |
| vm_rec = session.xenapi.VM.get_record(vm[0]) |
| curr_domid = vm_rec.get('domid') |
| except: |
| logging.debug("### 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 '%s' | sed 's/-A/-D/'" % vmchain |
| delcmds = util.pread2(['/bin/bash', '-c', delcmd]).split('\n') |
| for cmd in filter(None, delcmds): |
| try: |
| dc = 'iptables ' + cmd |
| util.pread2(filter(None, dc.split(' '))) |
| except: |
| logging.debug("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 |
| |
| logging.debug("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', '2', '-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/!--set/! --set/' | sed 's/-A/-D/'" |
| delcmd2 = "iptables-save | grep '\-A " + vmchain_default + "' | grep physdev-out | sed 's/!--set/! --set/'| 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/!--set/! --set/'" |
| inscmd2 = "iptables-save| grep '\-A " + vmchain_default + "' | grep physdev-in | grep tap | sed -r 's/tap[0-9]+.0/" + tap + "/' | sed 's/!--set/! --set/'" |
| inscmd3 = "iptables-save | grep '\-A " + vmchain_default + "' | grep physdev-out | grep vif | sed -r 's/vif[0-9]+.0/" + vif + "/' | sed 's/!--set/! --set/'" |
| inscmd4 = "iptables-save| grep '\-A " + vmchain_default + "' | grep physdev-out | grep tap | sed -r 's/tap[0-9]+.0/" + tap + "/' | sed 's/!--set/! --set/'" |
| |
| ipts = [] |
| for cmd in [delcmd, delcmd2, inscmd, inscmd2, inscmd3, inscmd4]: |
| cmds = util.pread2(['/bin/bash', '-c', cmd]).split('\n') |
| cmds.pop() |
| for c in filter(None,cmds): |
| ipt = c.split(' ') |
| ipt.insert(0, 'iptables') |
| ipts.append(ipt) |
| |
| for ipt in ipts: |
| try: |
| util.pread2(filter(None,ipt)) |
| except: |
| logging.debug("Failed to rewrite antispoofing rules for vm " + vm_name) |
| except: |
| logging.debug("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) |
| |
| #check whether the vm has secondary ips |
| if is_secondary_ips_set(vm_name) == True: |
| vmips = get_vm_sec_ips(vm_name) |
| #add arp rules for the secondaryp ip |
| for ip in vmips: |
| arp_rules_vmip(vmchain, vifs, [ip], vm_mac, "-A") |
| |
| |
| default_ebtables_antispoof_rules(vmchain, vifs, vm_ip, vm_mac) |
| rewrite_rule_log_for_vm(vm_name, curr_domid) |
| return True |
| |
| |
| |
| @echo |
| def get_vm_sec_ips(vm_name): |
| logfilename = "/var/run/cloud/" + vm_name +".ip" |
| |
| lines = (line.rstrip() for line in open(logfilename)) |
| for line in lines: |
| try: |
| [_vmName,_vmIP,_vmID] = line.split(',') |
| break |
| except ValueError,v: |
| [_vmName,_vmIP,_vmID] = line.split(',') |
| |
| _vmIPS = _vmIP.split(":")[:-1] |
| return _vmIPS |
| |
| @echo |
| def is_secondary_ips_set(vm_name): |
| logfilename = "/var/run/cloud/" + vm_name +".ip" |
| if not os.path.exists(logfilename): |
| return False |
| |
| return True |
| |
| @echo |
| 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: |
| logging.debug("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: |
| logging.debug("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': |
| logging.debug("vm " + vm_name + " is not running, cleaning up") |
| destroy_network_rules_for_vm(session, {'vmName':vm_name}) |
| cleaned = cleaned+1 |
| |
| logging.debug("Cleaned up rules for " + str(cleaned) + " vms") |
| except: |
| logging.debug("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: resident_vms= %s' %resident_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//'| sed 's/-eg//' | sort|uniq" |
| 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: vmchains= %s' %vmchains) |
| 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: |
| vmname = chain |
| vmpresent = False |
| #looping intentionally because if vmaname in resident_vms is not greedy. |
| #after trimming the vm names which more than 29 chars, resident vm name and iptables chain name is substring of |
| #of resident vm. |
| for rvm in resident_vms: |
| if vmname in rvm: |
| vmpresent = True |
| break |
| |
| if vmpresent is False: |
| vmname = chain + "-untagged" |
| for rvm in resident_vms: |
| if vmname in rvm: |
| vmpresent = True |
| break |
| #vm chain is present but vm is not running on the host. So remove the rules |
| if vmpresent is False: |
| logging.debug("vm " + chain + " is not running on this host, cleaning up") |
| cleanup.append(chain) |
| |
| for vm_name in cleanup: |
| destroy_network_rules_for_vm(session, {'vmName':vm_name}) |
| |
| logging.debug("Cleaned up rules for " + str(len(cleanup)) + " chains") |
| return str(len(cleanup)) |
| except Exception, ex: |
| logging.debug("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): |
| logging.debug("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: |
| logging.debug("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): |
| logging.debug("Change in default info set of vm %s" % vmName) |
| return [True, True, True] |
| else: |
| logging.debug("No change in default info set of vm %s" % vmName) |
| |
| reprogramChain = False |
| rewriteLog = True |
| if (int(seqno) > int(_seqno)): |
| if (_signature != signature): |
| reprogramChain = True |
| logging.debug("Seqno increased from %s to %s: reprogamming "\ |
| "ingress rules for vm %s" % (_seqno, seqno, vmName)) |
| else: |
| logging.debug("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)): |
| logging.debug("Seqno decreased from %s to %s: ignoring these "\ |
| "ingress rules for vm %s" % (_seqno, seqno, vmName)) |
| rewriteLog = False |
| elif (signature != _signature): |
| logging.debug("Seqno %s stayed the same but signature changed from "\ |
| "%s to %s for vm %s" % (seqno, _signature, signature, vmName)) |
| rewriteLog = True |
| reprogramChain = True |
| else: |
| logging.debug("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_secip_log_for_vm (vmName, secIps, vmId): |
| vm_name = vmName |
| logfilename = "/var/run/cloud/"+vm_name+".ip" |
| logging.debug("Writing log to " + logfilename) |
| logf = open(logfilename, 'w') |
| output = ','.join([vmName, secIps, vmId]) |
| result = True |
| |
| try: |
| logf.write(output) |
| logf.write('\n') |
| except: |
| logging.debug("Failed to write to rule log file " + logfilename) |
| result = False |
| |
| logf.close() |
| |
| return result |
| |
| @echo |
| def remove_secip_log_for_vm(vmName): |
| vm_name = vmName |
| logfilename = "/var/run/cloud/"+vm_name+".ip" |
| |
| result = True |
| try: |
| os.remove(logfilename) |
| except: |
| logging.debug("Failed to delete rule log file " + logfilename) |
| result = False |
| |
| return result |
| |
| @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" |
| logging.debug("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: |
| logging.debug("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: |
| logging.debug("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(): |
| type = getIpsetType() |
| tmpname = 'ipsetqzvxtmp' |
| try: |
| util.pread2(['ipset', '-N', tmpname, type]) |
| except: |
| util.pread2(['ipset', '-F', tmpname]) |
| |
| try: |
| util.pread2(['iptables -A INPUT -m set --set ' + tmpname + ' src' + ' -j ACCEPT']) |
| util.pread2(['iptables -D INPUT -m set --set ' + tmpname + ' src' + ' -j ACCEPT']) |
| keyword = 'set' |
| except: |
| keyword = 'match-set' |
| |
| try: |
| util.pread2(['ipset', '-X', tmpname]) |
| except: |
| pass |
| |
| cachefile = "/var/cache/cloud/ipset.keyword" |
| logging.debug("Writing ipset keyword to " + cachefile) |
| cachef = open(cachefile, 'w') |
| try: |
| cachef.write(keyword) |
| cachef.write('\n') |
| except: |
| logging.debug("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): |
| logging.debug("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') |
| sec_ips = args.get("secIps") |
| deflated = 'false' |
| |
| try: |
| util.pread2(['/bin/bash', '-c', 'iptables -n -L FORWARD | grep BRIDGE-FIREWALL']) |
| except: |
| can_bridge_firewall(session, args) |
| |
| if 'deflated' in args: |
| deflated = args.pop('deflated') |
| |
| try: |
| vm = session.xenapi.VM.get_by_name_label(vm_name) |
| if len(vm) != 1: |
| logging.debug("### 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: |
| logging.debug("### Failed to get domid for vm ## " + vm_name) |
| return 'false' |
| if domid == '-1': |
| logging.debug("### 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: |
| logging.debug("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) |
| logging.debug("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: |
| logging.debug("###Not programming any ingress rules since no changes detected?") |
| return 'true' |
| |
| if reprogramDefault: |
| logging.debug("Change detected in vmId or vmIp or domId, resetting default rules") |
| default_network_rules(session, args) |
| reason = 'domid_change' |
| |
| rules = args.pop('rules') |
| logging.debug("Network rules compressed in base64 [%s]." % rules) |
| |
| if deflated.lower() == 'true': |
| rules = inflate_rules (rules) |
| keyword = '--' + get_ipset_keyword() |
| |
| #Split spaces into lines. Example of rule [I:tcp;22;22;0.0.0.0/22,NEXT I:tcp;8001;8010;192.168.100.0/24,NEXT E:tcp;22;22;0.0.0.0/0,NEXT ] |
| #After split: |
| # I:tcp;22;22;0.0.0.0/22,NEXT |
| # I:tcp;8001;8010;192.168.100.0/24,NEXT |
| # E:tcp;22;22;0.0.0.0/0,NEXT |
| lines = rules.split(' ') |
| |
| logging.info("Network rules to be processed [%s]." % rules) |
| |
| logging.info("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)) |
| |
| # Flush iptables rules to clear ipset references and before re-applying iptable rules |
| for chain in [chain_name(vm_name), egress_chain_name(vm_name)]: |
| try: |
| util.pread2(['iptables', '-F', chain]) |
| except: |
| logging.debug("Ignoring failure to delete chain " + chain) |
| util.pread2(['iptables', '-N', chain]) |
| |
| cmds = [] |
| egressrules = 0 |
| for line in lines: |
| logging.debug("Processing rule [%s]." % line) |
| |
| #Example of rule: [I:tcp;12;34;1.2.3.4/24,NEXT] -> tokens: ['I:tcp', '12', '34', '1.2.3.4/24,NEXT']. |
| tokens = line.split(';') |
| logging.debug("Tokens %s." % tokens) |
| |
| tokens_size = len(tokens) |
| |
| expected_tokens_size = 4 |
| if tokens_size != expected_tokens_size: |
| logging.warning("Network rule tokens size [%s] is different from the expected size [%s], ignoring rule %s" % (str(tokens_size), str(expected_tokens_size), tokens)) |
| continue |
| |
| token_type, protocol = tokens[0].split(':') |
| start = tokens[1] |
| end = tokens[2] |
| cidrs = tokens[3].split(",") |
| # Remove placeholder 'NEXT' from the cidrs array |
| cidrs.pop() |
| allow_any = False |
| |
| if token_type == 'E': |
| vmchain = egress_chain_name(vm_name) |
| #ipset chain name |
| ipset_chain = egress_chain_name_ipset(vm_name) |
| action = "RETURN" |
| direction = "dst" |
| egressrules = egressrules + 1 |
| logging.debug("Ipset chaing [%s], VM chain [%s], VM name [%s], Action [%s], Direction [%s], egress rules [%s]" % (ipset_chain, vmchain, vm_name, action, direction, egressrules)) |
| else: |
| #ipset chain name |
| ipset_chain = ingress_chain_name_ipset(vm_name) |
| vmchain = chain_name(vm_name) |
| action = "ACCEPT" |
| direction = "src" |
| logging.debug("Ipset chaing [%s], VM [%s], Action [%s], Direction [%s], egress rules [%s]" % (ipset_chain, vm_name, action, direction, egressrules)) |
| if '0.0.0.0/0' in cidrs: |
| i = cidrs.index('0.0.0.0/0') |
| del cidrs[i] |
| allow_any = True |
| |
| port_range = start + ":" + end |
| logging.debug("port range [%s]" % port_range) |
| |
| if cidrs: |
| #create separate ipset name |
| ipsetname = ipset_chain + "" + protocol[0:1] + "" + start + "_" + end |
| if start == "-1": |
| ipsetname = ipset_chain + "_" + protocol[0:1] + "_any" |
| |
| if ipset(ipsetname, protocol, start, end, cidrs) == False: |
| logging.debug(" 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', port_range, '-m', 'state', '--state', 'NEW', '-m', 'set', keyword, ipsetname, direction, '-j', action] |
| else: |
| port_range = start + "/" + end |
| if start == "-1": |
| port_range = "any" |
| iptables = ['iptables', '-I', vmchain, '-p', 'icmp', '--icmp-type', port_range, '-m', 'set', keyword, ipsetname, direction, '-j', action] |
| cmds.append(iptables) |
| logging.debug(iptables) |
| |
| if allow_any and protocol != 'all': |
| if protocol != 'icmp': |
| iptables = ['iptables', '-I', vmchain, '-p', protocol, '-m', protocol, '--dport', port_range, '-m', 'state', '--state', 'NEW', '-j', action] |
| else: |
| port_range = start + "/" + end |
| if start == "-1": |
| port_range = "any" |
| iptables = ['iptables', '-I', vmchain, '-p', 'icmp', '--icmp-type', port_range, '-j', action] |
| cmds.append(iptables) |
| logging.debug(iptables) |
| |
| for cmd in cmds: |
| logging.debug("Executing command: [%s]." % str(cmd)) |
| util.pread2(cmd) |
| |
| vmchain = chain_name(vm_name) |
| egress_vmchain = egress_chain_name(vm_name) |
| |
| 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: |
| logging.exception("Failed to network rule!") |
| |
| if __name__ == "__main__": |
| XenAPIPlugin.dispatch({"pingtest": pingtest, "setup_iscsi":setup_iscsi, |
| "preparemigration": preparemigration, |
| "setIptables": setIptables, "pingdomr": pingdomr, "pingxenserver": pingxenserver, |
| "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, |
| "network_rules_vmSecondaryIp":network_rules_vmSecondaryIp, |
| "get_rule_logs_for_vms":get_rule_logs_for_vms, |
| "add_to_VCPUs_params_live":add_to_VCPUs_params_live, |
| "setLinkLocalIP":setLinkLocalIP, |
| "cleanup_rules":cleanup_rules, |
| "createFileInDomr":createFileInDomr, |
| "kill_copy_process":kill_copy_process, |
| "secureCopyToHost":secureCopyToHost, |
| "runPatchScriptInDomr": runPatchScriptInDomr}) |
