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###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems) #
# and others #
# #
# All rights reserved. This program and the accompanying materials #
# are made available under the terms of the Apache License, Version 2.0 #
# which accompanies this distribution, and is available at #
# http://www.apache.org/licenses/LICENSE-2.0 #
###############################################################################
import json
import re
from discover.fetchers.cli.cli_access import CliAccess
from discover.fetchers.db.db_access import DbAccess
from utils.inventory_mgr import InventoryMgr
from utils.singleton import Singleton
class DbFetchVedgesOvs(DbAccess, CliAccess, metaclass=Singleton):
def __init__(self):
super().__init__()
self.inv = InventoryMgr()
self.port_re = re.compile("^\s*port (\d+): ([^(]+)( \(internal\))?$")
self.port_line_header_prefix = " " * 8 + "Port "
def get(self, id):
host_id = id[:id.rindex('-')]
results = self.get_objects_list_for_id(
"""
SELECT *
FROM {}.agents
WHERE host = %s AND agent_type = 'Open vSwitch agent'
""".format(self.neutron_db),
"vedge", host_id)
host = self.inv.get_by_id(self.get_env(), host_id)
if not host:
self.log.error("unable to find host in inventory: %s", host_id)
return []
host_types = host["host_type"]
if "Network" not in host_types and "Compute" not in host_types:
return []
vsctl_lines = self.run_fetch_lines("ovs-vsctl show", host["id"])
ports = self.fetch_ports(host, vsctl_lines)
for doc in results:
doc["name"] = doc["host"] + "-OVS"
doc["configurations"] = json.loads(doc["configurations"])
doc["ports"] = ports
doc["tunnel_ports"] = self.get_overlay_tunnels(doc, vsctl_lines)
return results
def fetch_ports(self, host, vsctl_lines):
host_types = host["host_type"]
if "Network" not in host_types and "Compute" not in host_types:
return {}
ports = self.fetch_ports_from_dpctl(host["id"])
self.fetch_port_tags_from_vsctl(vsctl_lines, ports)
return ports
def fetch_ports_from_dpctl(self, host_id):
cmd = "ovs-dpctl show"
lines = self.run_fetch_lines(cmd, host_id)
ports = {}
for l in lines:
port_matches = self.port_re.match(l)
if not port_matches:
continue
port = {}
id = port_matches.group(1)
name = port_matches.group(2)
is_internal = port_matches.group(3) == " (internal)"
port["internal"] = is_internal
port["id"] = id
port["name"] = name
ports[name] = port
return ports
# from ovs-vsctl, fetch tags of ports
# example format of ovs-vsctl output for a specific port:
# Port "tap9f94d28e-7b"
# tag: 5
# Interface "tap9f94d28e-7b"
# type: internal
def fetch_port_tags_from_vsctl(self, vsctl_lines, ports):
port = None
for l in vsctl_lines:
if l.startswith(self.port_line_header_prefix):
port = None
port_name = l[len(self.port_line_header_prefix):]
# remove quotes from port name
if '"' in port_name:
port_name = port_name[1:][:-1]
if port_name in ports:
port = ports[port_name]
continue
if not port:
continue
if l.startswith(" " * 12 + "tag: "):
port["tag"] = l[l.index(":") + 2:]
ports[port["name"]] = port
return ports
def get_overlay_tunnels(self, doc, vsctl_lines):
if doc["agent_type"] != "Open vSwitch agent":
return {}
if "tunneling_ip" not in doc["configurations"]:
return {}
if not doc["configurations"]["tunneling_ip"]:
self.get_bridge_pnic(doc)
return {}
# read the 'br-tun' interface ports
# this will be used later in the OTEP
tunnel_bridge_header = " " * 4 + "Bridge br-tun"
try:
br_tun_loc = vsctl_lines.index(tunnel_bridge_header)
except ValueError:
return []
lines = vsctl_lines[br_tun_loc + 1:]
tunnel_ports = {}
port = None
for l in lines:
# if we have only 4 or less spaces in the beginng,
# the br-tun section ended so return
if not l.startswith(" " * 5):
break
if l.startswith(self.port_line_header_prefix):
if port:
tunnel_ports[port["name"]] = port
name = l[len(self.port_line_header_prefix):].strip('" ')
port = {"name": name}
elif port and l.startswith(" " * 12 + "Interface "):
interface = l[10 + len("Interface ") + 1:].strip('" ')
port["interface"] = interface
elif port and l.startswith(" " * 16):
colon_pos = l.index(":")
attr = l[:colon_pos].strip()
val = l[colon_pos + 2:].strip('" ')
if attr == "options":
opts = val.strip('{}')
val = {}
for opt in opts.split(", "):
opt_name = opt[:opt.index("=")]
opt_val = opt[opt.index("=") + 1:].strip('" ')
val[opt_name] = opt_val
port[attr] = val
if port:
tunnel_ports[port["name"]] = port
return tunnel_ports
def get_bridge_pnic(self, doc):
conf = doc["configurations"]
if "bridge_mappings" not in conf or not conf["bridge_mappings"]:
return
for v in conf["bridge_mappings"].values(): br = v
ifaces_list_lines = self.run_fetch_lines("ovs-vsctl list-ifaces " + br,
doc["host"])
br_pnic_postfix = br + "--br-"
interface = ""
for l in ifaces_list_lines:
if l.startswith(br_pnic_postfix):
interface = l[len(br_pnic_postfix):]
break
if not interface:
return
doc["pnic"] = interface
# add port ID to pNIC
pnic = self.inv.find_items({
"environment": self.get_env(),
"type": "switch_pnic",
"host": doc["host"],
"name": interface
}, get_single=True)
if not pnic:
return
port = doc["ports"][interface]
pnic["port_id"] = port["id"]
self.inv.set(pnic)
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