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OpenStack Network - Local

OpenStack Network - Local

Author: Yugang LIU <liuyug@gmail.com>
Copyright: 署名-相同方式共享 3.0 (CC BY-SA 3.0)

OpenStack Local 网络配置详解

其它相关文件请查阅我的 SimpleStack

local.png

1   Configure network

sh local_settings.sh

#!/bin/sh

cur_dir=`dirname  $(readlink -fn $0)`

. $cur_dir/../functions.sh
stack_conf=$cur_dir/../stack.conf

# To configure the Modular Layer 2 (ML2) plug-in
conf_file="/etc/neutron/plugins/ml2/ml2_conf.ini"
ini_set $conf_file "ml2" "type_drivers" "local"
ini_set $conf_file "ml2" "tenant_network_types" "local"
ini_set $conf_file "ml2" "mechanism_drivers" "openvswitch"
ini_set $conf_file "ovs" "integration_bridge" "br-int"

service neutron-plugin-openvswitch-agent restart
service neutron-l3-agent restart
service neutron-dhcp-agent restart
service neutron-metadata-agent restart
service neutron-server restart

# vim: ts=4 sw=4 et tw=79

2   Create external network

sh create_ext-net.sh

#!/bin/sh

cur_dir=`dirname  $(readlink -fn $0)`
. $cur_dir/../../functions.sh
stack_conf=$cur_dir/../../stack.conf

. $cur_dir/../../admin-openrc.sh

if [ "x$1" = "xclean" ]; then
    neutron router-gateway-clear demo-router
    neutron subnet-delete ext-subnet
    neutron net-delete ext-net
    exit 0
fi

FLOATING_IP_START=`ini_get $stack_conf "neutron" "floating_ip_start"`
FLOATING_IP_END=`ini_get $stack_conf "neutron" "floating_ip_end"`
EXTERNAL_NETWORK_GATEWAY=`ini_get $stack_conf "neutron" "external_network_gateway"`
EXTERNAL_NETWORK_CIDR=`ini_get $stack_conf "neutron" "external_network_cidr"`

tenant_id=`keystone tenant-list | awk '/ admin /{print $2}'`
neutron net-create ext-net \
    --shared \
    --tenant_id=$tenant_id \
    --router:external=True

neutron subnet-create ext-net --name ext-subnet \
    --tenant_id=$tenant_id \
    --disable-dhcp \
    --allocation-pool start=$FLOATING_IP_START,end=$FLOATING_IP_END \
    --gateway $EXTERNAL_NETWORK_GATEWAY \
    $EXTERNAL_NETWORK_CIDR

# vim: ts=4 sw=4 et tw=79

3   Create internal network

sh create_int-net.sh

#!/bin/sh

cur_dir=`dirname  $(readlink -fn $0)`
. $cur_dir/../../functions.sh
stack_conf=$cur_dir/../../stack.conf

. $cur_dir/../../admin-openrc.sh


if [ "x$1" = "xclean" ]; then
    neutron router-gateway-clear demo-router
    neutron router-interface-delete demo-router demo-subnet
    neutron router-delete demo-router
    neutron subnet-delete demo-subnet
    neutron net-delete demo-net
    exit 0
fi


TENANT_NETWORK_GATEWAY=`ini_get $stack_conf "neutron" "tenant_network_gateway"`
TENANT_NETWORK_CIDR=`ini_get $stack_conf "neutron" "tenant_network_cidr"`

tenant_id=`keystone tenant-list | awk '/ demo /{print $2}'`
neutron net-create demo-net \
    --tenant_id=$tenant_id

neutron subnet-create demo-net \
    --name demo-subnet \
    --tenant_id=$tenant_id \
    --dns-nameserver 8.8.8.8 \
    --gateway $TENANT_NETWORK_GATEWAY \
    $TENANT_NETWORK_CIDR

neutron router-create demo-router \
    --tenant_id=$tenant_id

neutron router-interface-add demo-router demo-subnet
neutron router-gateway-set demo-router ext-net

# vim: ts=4 sw=4 et tw=79

4   Create VM

sh tools/create_vm.sh cirros01 cirros-x86_64 demo-net

connect to VM through vnc:

nova get-vnc-console cirros01

5   Check network

5.1   compute node

ovs-vsctl show:

20add6c1-a16c-4227-982b-52dad4261a5b
    Bridge br-int
        Port "qvo7bfa2daa-66"
            tag: 2
            Interface "qvo7bfa2daa-66"
        Port "qr-cbfa75fd-e1"
            tag: 2
            Interface "qr-cbfa75fd-e1"
                type: internal
        Port "tapa042dd0d-97"
            tag: 2
            Interface "tapa042dd0d-97"
                type: internal
        Port br-int
            Interface br-int
                type: internal
    Bridge br-ex
        Port br-ex
            Interface br-ex
                type: internal
        Port "qg-c5ab6a1c-f1"
            Interface "qg-c5ab6a1c-f1"
                type: internal
        Port "eth0"
            Interface "eth0"
    ovs_version: "2.0.1"

ip link:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP mode DEFAULT group default qlen 1000
    link/ether 00:26:2d:fe:da:fc brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:23:14:79:c7:b4 brd ff:ff:ff:ff:ff:ff
4: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default
    link/ether f2:c9:24:ce:b6:13 brd ff:ff:ff:ff:ff:ff
5: br-ex: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/ether 00:26:2d:fe:da:fc brd ff:ff:ff:ff:ff:ff
6: br-int: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/ether d2:13:d2:3b:79:4a brd ff:ff:ff:ff:ff:ff
7: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default
    link/ether 92:1d:26:a8:fa:37 brd ff:ff:ff:ff:ff:ff
23: qbr7bfa2daa-66: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default
    link/ether 32:ba:59:e0:15:06 brd ff:ff:ff:ff:ff:ff
24: qvo7bfa2daa-66: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP mode DEFAULT group default qlen 1000
    link/ether ce:6a:49:bf:59:d3 brd ff:ff:ff:ff:ff:ff
25: qvb7bfa2daa-66: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbr7bfa2daa-66 state UP mode DEFAULT group default qlen 1000
    link/ether 32:ba:59:e0:15:06 brd ff:ff:ff:ff:ff:ff
26: tap7bfa2daa-66: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbr7bfa2daa-66 state UNKNOWN mode DEFAULT group default qlen 500
    link/ether fe:16:3e:5f:1f:58 brd ff:ff:ff:ff:ff:ff

brctl show:

bridge name bridge id               STP enabled     interfaces
qbr7bfa2daa-66              8000.32ba59e01506       no              qvb7bfa2daa-66
                            tap7bfa2daa-66

virsh list:

 Id    Name                           State
----------------------------------------------------
 2     instance-00000007              running

virsh dumpxml instance-00000007 | grep tap:

<target dev='tap7bfa2daa-66'/>
  • VM 使用接口 tap7bfa2daa-66
  • tap7bfa2daa-66 和 qvb7bfa2daa-66 在桥 qbr7bfa2daa-66 里

ethtool -S qvb7bfa2daa-66:

NIC statistics:
     peer_ifindex: 24

# from ip link
# 24: qvo7bfa2daa-66: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master ovs-system state UP mode DEFAULT group default qlen 1000
    link/ether ce:6a:49:bf:59:d3 brd ff:ff:ff:ff:ff:ff

ethtool -S qvo7bfa2daa-66:

NIC statistics:
     peer_ifindex: 25

# from ip link
# 25: qvb7bfa2daa-66: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbr7bfa2daa-66 state UP mode DEFAULT group default qlen 1000
    link/ether 32:ba:59:e0:15:06 brd ff:ff:ff:ff:ff:ff
  • qvb7bfa2daa-66 和 qvo7bfa2daa-66 是一对 veth
  • qvo7bfa2daa-66 在 br-int 里

ip netns:

qdhcp-5f2ffda1-76da-427e-b3c1-4bfc088cfb75
qrouter-7052699b-ed8d-48a0-8365-50ac54017dfc

ip netns exec qdhcp-5f2ffda1-76da-427e-b3c1-4bfc088cfb75 ip link:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
22: tapa042dd0d-97: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/ether fa:16:3e:d3:3f:64 brd ff:ff:ff:ff:ff:ff

ps -ef | grep dns:

nobody    6390     1  0 09:11 ?        00:00:00 dnsmasq --no-hosts --no-resolv --strict-order --bind-interfaces --interface=tapa042dd0d-97 --except-interface=lo --pid-file=/var/lib/neutron/dhcp/5f2ffda1-76da-427e-b3c1-4bfc088cfb75/pid --dhcp-hostsfile=/var/lib/neutron/dhcp/5f2ffda1-76da-427e-b3c1-4bfc088cfb75/host --addn-hosts=/var/lib/neutron/dhcp/5f2ffda1-76da-427e-b3c1-4bfc088cfb75/addn_hosts --dhcp-optsfile=/var/lib/neutron/dhcp/5f2ffda1-76da-427e-b3c1-4bfc088cfb75/opts --leasefile-ro --dhcp-range=set:tag0,10.0.1.0,static,86400s --dhcp-lease-max=16 --conf-file= --domain=openstacklocal
root      7797  3390  0 10:00 pts/0    00:00:00 grep --color=auto dns
  • tapa042dd0d-97 接口上是 DHCP 服务

ip netns exec qrouter-7052699b-ed8d-48a0-8365-50ac54017dfc ip link:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
20: qr-cbfa75fd-e1: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/ether fa:16:3e:7f:af:47 brd ff:ff:ff:ff:ff:ff
21: qg-c5ab6a1c-f1: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
    link/ether fa:16:3e:61:7b:20 brd ff:ff:ff:ff:ff:ff

ip netns exec qrouter-7052699b-ed8d-48a0-8365-50ac54017dfc ip route:

default via 192.168.1.1 dev qg-c5ab6a1c-f1
192.168.1.0/24 dev qg-c5ab6a1c-f1  proto kernel  scope link  src 192.168.1.245
10.0.1.0/28 dev qr-cbfa75fd-e1  proto kernel  scope link  src 10.0.1.1
  • qr-XXX 和 qg-XXX 两个接口被路由
  • br-int 通过 qr-XXX, qg-XXX 路由到 br-ex

ip netns exec qrouter-7052699b-ed8d-48a0-8365-50ac54017dfc iptables -S:

-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT
-N neutron-filter-top
-N neutron-l3-agent-FORWARD
-N neutron-l3-agent-INPUT
-N neutron-l3-agent-OUTPUT
-N neutron-l3-agent-local
-A INPUT -j neutron-l3-agent-INPUT
-A FORWARD -j neutron-filter-top
-A FORWARD -j neutron-l3-agent-FORWARD
-A OUTPUT -j neutron-filter-top
-A OUTPUT -j neutron-l3-agent-OUTPUT
-A neutron-filter-top -j neutron-l3-agent-local
-A neutron-l3-agent-INPUT -d 127.0.0.1/32 -p tcp -m tcp --dport 9697 -j ACCEPT

ip netns exec qrouter-7052699b-ed8d-48a0-8365-50ac54017dfc iptables -t nat -S:

-P PREROUTING ACCEPT
-P INPUT ACCEPT
-P OUTPUT ACCEPT
-P POSTROUTING ACCEPT
-N neutron-l3-agent-OUTPUT
-N neutron-l3-agent-POSTROUTING
-N neutron-l3-agent-PREROUTING
-N neutron-l3-agent-float-snat
-N neutron-l3-agent-snat
-N neutron-postrouting-bottom
-A PREROUTING -j neutron-l3-agent-PREROUTING
-A OUTPUT -j neutron-l3-agent-OUTPUT
-A POSTROUTING -j neutron-l3-agent-POSTROUTING
-A POSTROUTING -j neutron-postrouting-bottom
-A neutron-l3-agent-POSTROUTING ! -i qg-c5ab6a1c-f1 ! -o qg-c5ab6a1c-f1 -m conntrack ! --ctstate DNAT -j ACCEPT
-A neutron-l3-agent-PREROUTING -d 169.254.169.254/32 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 9697
-A neutron-l3-agent-snat -j neutron-l3-agent-float-snat
-A neutron-l3-agent-snat -s 10.0.1.0/28 -j SNAT --to-source 192.168.1.245
-A neutron-postrouting-bottom -j neutron-l3-agent-snat
  • 访问 169.254.169.254:80 将被转发到 169.254.169.254:9697
  • 从 10.0.1.0 出发的包，源地址变成 192.168.1.245。VM 通过地址转换可以访问外网

ip netns exec qrouter-7052699b-ed8d-48a0-8365-50ac54017dfc netstat -tunlp:

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:9697            0.0.0.0:*               LISTEN      5957/python

ps -ef | grep 5957:

root      5957     1  0 09:10 ?        00:00:00 /usr/bin/python /usr/bin/neutron-ns-metadata-proxy --pid_file=/var/lib/neutron/external/pids/7052699b-ed8d-48a0-8365-50ac54017dfc.pid --metadata_proxy_socket=/var/lib/neutron/metadata_proxy --router_id=7052699b-ed8d-48a0-8365-50ac54017dfc --state_path=/var/lib/neutron --metadata_port=9697 --verbose --log-file=neutron-ns-metadata-proxy-7052699b-ed8d-48a0-8365-50ac54017dfc.log --log-dir=/var/log/neutron
root      7917  3390  0 10:06 pts/0    00:00:00 grep --color=auto 5957
  • 9697 端口是 Neutron Metadata agent

5.2   OpenFlow

ovs-ofctl dump-flows br-int:

NXST_FLOW reply (xid=0x4):
 cookie=0x0, duration=6525.696s, table=0, n_packets=437, n_bytes=90523, idle_age=3315, priority=1 actions=NORMAL

ovs-ofctl dump-flows br-ex:

NXST_FLOW reply (xid=0x4):
 cookie=0x0, duration=6590.781s, table=0, n_packets=23602, n_bytes=3315438, idle_age=0, priority=0 actions=NORMAL
  • 不做 flow 处理

OpenStack Comments(19) 2014年7月16日 17:01




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