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OpenStack Network - Local - zzzz~~~'s Blog

OpenStack Network - Local

zzzz~~~ posted @ 2014年7月16日 17:01 in OpenStack , 1521 阅读

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)

Contents

1 Configure network
2 Create external network
3 Create internal network
4 Create VM
5 Check network
- 5.1 compute node
- 5.2 OpenFlow

OpenStack Local 网络配置详解

其它相关文件请查阅我的 SimpleStack

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

5.2 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

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2022年11月09日 10:27

If your OpenStack-hosted virtual instances need network connection, you must establish a network. There are several types of networks, and in order to make the best selection, you must comprehend at least two crucial network attributes: 'router:external' and'shared'

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The subsequent sequence of commands will generate networks, subnets, routers, security group rules, instances, and floating IP addresses. When this is complete, the four distinct types of networks will be operational.

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Great guide on configuring OpenStack networks! I found the sections on creating internal and external networks particularly helpful. It reminds me of strategy games like Bad Parenting, where the right setup can make all the difference. For anyone looking to dive deeper, consider exploring DHCP settings to optimize your network further. Would love to see more practical examples in future posts!

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