118 lines
3.9 KiB
Python
118 lines
3.9 KiB
Python
"""
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sdn.py defines services to start Open vSwitch and the Ryu SDN Controller.
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"""
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import re
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import netaddr
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from core.services.coreservices import CoreService
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class SdnService(CoreService):
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"""
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Parent class for SDN services.
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"""
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group = "SDN"
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@classmethod
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def generate_config(cls, node, filename):
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return ""
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class OvsService(SdnService):
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name = "OvsService"
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executables = ("ovs-ofctl", "ovs-vsctl")
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group = "SDN"
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dirs = ("/etc/openvswitch", "/var/run/openvswitch", "/var/log/openvswitch")
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configs = ("OvsService.sh",)
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startup = ("sh OvsService.sh",)
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shutdown = ("killall ovs-vswitchd", "killall ovsdb-server")
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@classmethod
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def generate_config(cls, node, filename):
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# Check whether the node is running zebra
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has_zebra = 0
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for s in node.services:
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if s.name == "zebra":
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has_zebra = 1
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cfg = "#!/bin/sh\n"
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cfg += "# auto-generated by OvsService (OvsService.py)\n"
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cfg += "/etc/init.d/openvswitch-switch start < /dev/null\n"
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cfg += "ovs-vsctl add-br ovsbr0 -- set Bridge ovsbr0 fail-mode=secure\n"
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cfg += "ifconfig ovsbr0 up\n"
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for ifc in node.netifs():
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if hasattr(ifc, "control") and ifc.control is True:
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continue
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ifnumstr = re.findall(r"\d+", ifc.name)
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ifnum = ifnumstr[0]
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# create virtual interfaces
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cfg += "ip link add rtr%s type veth peer name sw%s\n" % (ifnum, ifnum)
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cfg += "ifconfig rtr%s up\n" % ifnum
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cfg += "ifconfig sw%s up\n" % ifnum
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# remove ip address of eths because quagga/zebra will assign same IPs to rtr interfaces
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# or assign them manually to rtr interfaces if zebra is not running
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for ifcaddr in ifc.addrlist:
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addr = ifcaddr.split("/")[0]
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if netaddr.valid_ipv4(addr):
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cfg += "ip addr del %s dev %s\n" % (ifcaddr, ifc.name)
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if has_zebra == 0:
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cfg += "ip addr add %s dev rtr%s\n" % (ifcaddr, ifnum)
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elif netaddr.valid_ipv6(addr):
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cfg += "ip -6 addr del %s dev %s\n" % (ifcaddr, ifc.name)
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if has_zebra == 0:
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cfg += "ip -6 addr add %s dev rtr%s\n" % (ifcaddr, ifnum)
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else:
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raise ValueError("invalid address: %s" % ifcaddr)
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# add interfaces to bridge
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cfg += "ovs-vsctl add-port ovsbr0 eth%s\n" % ifnum
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cfg += "ovs-vsctl add-port ovsbr0 sw%s\n" % ifnum
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# Add rule for default controller if there is one local (even if the controller is not local, it finds it)
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cfg += "ovs-vsctl set-controller ovsbr0 tcp:127.0.0.1:6633\n"
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# Setup default flows
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portnum = 1
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for ifc in node.netifs():
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if hasattr(ifc, "control") and ifc.control is True:
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continue
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cfg += (
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"ovs-ofctl add-flow ovsbr0 priority=1000,in_port=%d,action=output:%d\n"
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% (portnum, portnum + 1)
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)
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cfg += (
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"ovs-ofctl add-flow ovsbr0 priority=1000,in_port=%d,action=output:%d\n"
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% (portnum + 1, portnum)
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)
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portnum += 2
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return cfg
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class RyuService(SdnService):
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name = "ryuService"
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executables = ("ryu-manager",)
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group = "SDN"
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dirs = ()
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configs = ("ryuService.sh",)
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startup = ("sh ryuService.sh",)
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shutdown = ("killall ryu-manager",)
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@classmethod
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def generate_config(cls, node, filename):
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"""
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Return a string that will be written to filename, or sent to the
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GUI for user customization.
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"""
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cfg = "#!/bin/sh\n"
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cfg += "# auto-generated by ryuService (ryuService.py)\n"
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cfg += (
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"ryu-manager --observe-links ryu.app.ofctl_rest ryu.app.rest_topology &\n"
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)
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return cfg
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