X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=topo.py;h=c895741e553a3f85fc2c6ebd7b54bfd5aa6c9b35;hb=4d2db6bf4fca9a75c83d97f4df252076e16b8b2b;hp=e142802772f22312d41298905c439a19f52ab4b9;hpb=1b5940a1a58122ab437c3b2dfe0794bbf01118c7;p=nodemanager-topo.git diff --git a/topo.py b/topo.py index e142802..c895741 100755 --- a/topo.py +++ b/topo.py @@ -31,6 +31,13 @@ def run(cmd): return subprocess.call(cmd, shell=True); +""" +Subnet used for virtual interfaces by setup-egre-link script +""" +def iias_network(): + return "192.168.0.0 255.255.0.0" + + """ Check for existence of interface dx """ @@ -46,7 +53,7 @@ Create a "virtual link" for slice between here and nodeid. The key is used to create the EGRE tunnel. """ def setup_virtual_link(slice, key, rate, myid, nodeid, ipaddr, virtip, vnet): - logger.log("%s: Set up virtual link to node %d" % (slice, nodeid)) + logger.log("%s: Set up virtual link to node %s" % (slice, nodeid)) run(setup_link_cmd + " %s %s %s %s %s %s %s" % (slice, nodeid, ipaddr, key, rate, virtip, vnet)) return @@ -71,6 +78,14 @@ def refresh_virtual_link(nodeid, key): return +""" +IP address of the NAT interface created inside the slice by the +setup-nat script. +""" +def nat_inner_ip(key): + return "10.0.%s.2" % key + + """ Check for existence of interface natx """ @@ -152,6 +167,11 @@ def update_links(slice, myid, topospec, key, netns): logger.log("%s: virtual link to node %s exists" % (slice, nodeid)) refresh_virtual_link(nodeid, key) + +""" +Update NAT interface for the slice +""" +def update_nat(slice, myid, key, netns): if not nat_exists(key): if netns: setup_nat(slice, myid, key) @@ -161,11 +181,12 @@ def update_links(slice, myid, topospec, key, netns): """ -Write /etc/vservers//spaces/net +Write /etc/vservers//spaces/net. If the vserver is running and the spaces/net file is modified, we need to restart it. """ -def writeConf(slicename, value): +def write_conf_and_restart(slicename, value): SLICEDIR="/etc/vservers/%s/" % slicename SPACESDIR="%s/spaces/" % SLICEDIR + FILENAME="%s/net" % SPACESDIR if os.path.exists(SLICEDIR): if not os.path.exists(SPACESDIR): try: @@ -173,13 +194,27 @@ def writeConf(slicename, value): except os.error: logger.log("topo: could not create %s\n" % SPACESDIR) return - f = open("%s/net" % SPACESDIR, "w") - f.write("%s\n" % value) - f.close() - STATUS="OFF" - if value: - STATUS="ON" - logger.log("%s: network namespace %s\n" % (slicename, STATUS)) + + if os.path.exists(FILENAME) != value: + sliver = vserver.VServer(slicename) + restart = sliver.is_running() + + if (restart): + sliver.stop() + + if value: + STATUS="ON" + f = open(FILENAME, "w") + f.close() + else: + STATUS="OFF" + os.remove(FILENAME) + + logger.log("%s: network namespace %s\n" % (slicename, STATUS)) + + if (restart): + logger.log("topo: restarting sliver %s\n" % slicename) + sliver.start() """ @@ -211,17 +246,16 @@ password %s """ -Network used by OpenVPN on this node +IP address of NAT gateway to outside world """ -def openvpn_net(myid): - return "10.%s.0.0/16" % myid - +def nat_gw(key): + return "10.0.%s.1" % key """ -IP address of NAT gateway to outside world +IP address of the NAT interface inside the slice """ -def nat_gw(key, myid): - return "10.%s.%s.1" % (key, myid) +def nat_inner(key): + return "10.0.%s.2" % key """ @@ -241,13 +275,11 @@ link-detect """ % name) f.write ("""! -ip route %s %s -! access-list vty permit 127.0.0.1/32 ! line vty ! -""" % (openvpn_net(myid), nat_gw(key, myid))) +""") f.close() return @@ -259,6 +291,7 @@ def write_ospf(filename, myname, ifaces): f = open(filename, 'w') password = "zebra" write_header(f, myname, password) + name = None for name in ifaces: f.write ("""! @@ -269,7 +302,8 @@ def write_ospf(filename, myname, ifaces): ip ospf network non-broadcast """ % name) - f.write ("""! + if name: + f.write ("""! router ospf ospf router-id %s """ % ifaces[name]['local-ip']) @@ -281,7 +315,7 @@ def write_ospf(filename, myname, ifaces): net = ifaces[name]['network'] f.write (" network %s area 0\n" % net) - f.write(""" redistribute static + f.write(""" redistribute kernel ! access-list vty permit 127.0.0.1/32 ! @@ -324,8 +358,30 @@ def update_hosts(slicename, hosts): f.close() return +""" +Write /etc/vini/egre-keys.txt, used by vsys topo scripts +""" +def write_egre_keys(slicekeys): + vini_dir = "/etc/vini" + if not os.path.exists(vini_dir): + try: + os.mkdir(vini_dir) + except os.error: + logger.log("topo: could not create %s\n" % vini_dir) + return + keys_file = "%s/egre-keys.txt" % vini_dir + f = open(keys_file, 'w') + for slice in slicekeys: + f.write("%s %s\n" % (slice, slicekeys[slice])) + f.close() + return + +""" +Executed on NM startup +""" def start(options, config): + run ("echo 1 > /proc/sys/net/ipv4/ip_forward") pass @@ -340,25 +396,32 @@ def GetSlivers(data): global ifaces, old_ifaces ifaces = old_ifaces = sioc.gifconf() + slicekeys = {} for sliver in data['slivers']: attrs = {} - for attribute in sliver['attributes']: - attrs[attribute['name']] = attribute['value'] + for tag in sliver['attributes']: + attrs[tag['tagname']] = tag['value'] + if tag['tagname'] == 'egre_key': + slicekeys[sliver['name']] = tag['value'] + + if 'netns' in attrs: netns = int(attrs['netns']) - writeConf(sliver['name'], netns) else: netns = 0 + write_conf_and_restart(sliver['name'], netns) if vserver.VServer(sliver['name']).is_running(): - if 'egre_key' in attrs and 'topo_rspec' in attrs: - logger.log("topo: Update topology for slice %s" % \ - sliver['name']) - update_links(sliver['name'], data['node_id'], - attrs['topo_rspec'], attrs['egre_key'], netns) - update_quagga_configs(sliver['name'], data['hostname'], - data['node_id'], attrs['topo_rspec'], - attrs['egre_key'], netns) + if 'egre_key' in attrs: + logger.log("topo: Update slice %s" % sliver['name']) + update_nat(sliver['name'], data['node_id'], attrs['egre_key'], + netns) + if 'topo_rspec' in attrs: + update_links(sliver['name'], data['node_id'], + attrs['topo_rspec'], attrs['egre_key'], netns) + update_quagga_configs(sliver['name'], data['hostname'], + data['node_id'], attrs['topo_rspec'], + attrs['egre_key'], netns) if 'hosts' in attrs: update_hosts(sliver['name'], attrs['hosts']) else: @@ -366,6 +429,7 @@ def GetSlivers(data): sliver['name']) clean_up_old_virtual_links() + write_egre_keys(slicekeys) return