Open-stack Queens network configuration tutorial 2018

Q: How to Configure Network in OpenStack

Step 1:

Cheek interface using “ip a” command

ip a

Copy Interface file and edit

cd /etc/sysconfig/network-scripts/

cp ifcfg-enp0s3 ifcfg-br-ex

vi /etc/sysconfig/network-scripts/ifcfg-br-ex

TYPE=OVSBridge
BOOTPROTO=static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
NAME=br-ex
UUID=d2f77013-76f1-4829-8137-d98f44a19632
DEVICE=br-ex
DEVICETYPE=ovs
ONBOOT=yes
IPADDR=172.17.20.100
NETMASK=255.255.0.0
GATEWAY=172.17.0.1
DNS1=8.8.8.8

vi /etc/sysconfig/network-scripts/ifcfg-enp3s0

TYPE="OVSPort"
DEVICETYPE="ovs"
OVS_BRIDGE="br-ex"
BOOTPROTO=static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
NAME=enp3s0
UUID=d2f77013-76f1-4829-8137-d98f44a19632
DEVICE=enp3s0
ONBOOT=yes



Restart Network Service

systemctl restart network

Check Status :

ip a

Step 2:

Configure Neutron Controller: open File and add Below line

vi /etc/neutron/plugin.ini

type_drivers = vxlan,flat



flat_networks = *



Restart neutron-server Service

systemctl restart neutron-server.service

Step 3:

Map the Bridge to the physical network : Find bridge_mappings and add “physnet1:br-ex“

vi /etc/neutron/plugins/ml2/openvswitch_agent.ini

bridge_mappings = physnet1:br-ex



Restart the neutron-openvswitch-agent service

systemctl restart neutron-openvswitch-agent

Step 4:

Enables the use of External provider networks and leave blank

vi /etc/neutron/l3_agent.ini

external_network_bridge =



Restart neutron-l3-agent

systemctl restart neutron-l3-agent.service

Step 5:

Video Tutorial  - English



Video Tutorial  - Hindi


Load source file : find in /root/ or create new one with following content

unset OS_SERVICE_TOKEN
export OS_USERNAME=admin
export OS_PASSWORD=1661bfc512194d92
export OS_AUTH_URL=http://172.17.20.100:5000/v2.0
export PS1='[\u@\h \W(keystone_admin)]\$ '
export OS_TENANT_NAME=admin
export OS_REGION_NAME=RegionOne




Run source file

source keystonerc_admin

Step 6:

Create Flat External Network Interface and Associate it with the configured physical_network

neutron net-create linuxtopic-external --provider:network_type flat --provider:physical_network physnet1 --router:external=True --shared

Step 7:

Open Dashboard: Login

http://172.17.20.100/

User = AdminPwd = 1661bfc512194d92 # see keystonerc_admin

cat /root/keystonerc_admin

   

Project Window:

Step 2:

Create Subnet for External Network

Go to → Project → Network → Networks

In network Windows  find “linuxtopic-external”  and Press “Add Subnet”

Add Subnet According to your Needs  :

Subnet Name :

Network Address :

IP Version :

Gateway IP :

Add Subnet Details: like DHCP and POOL

After Successfully Adding :

External Network Configured, Now we configure Internal Network for Inside Openstack Communication

Step 3:

Internal Network

Go to → Project → Network → Networks

In Network Window Press  “Create Network” button

Network Name: linuxtopic-internal

Admin State: UP

And Check on Create Subnet

Press “ Next”

Subnet :

Add Subnet According to your Needs  :

Subnet Name: linuxtopic-internal

Network Address: 192.168.20.0/24

IP Version: IPv4

Gateway IP: 192.168.20.1

Subnet Details :

Step 4 :

Create Router :

Go to → Project → Network → Router

Press “Create Router”

Router Name:linuxtopic-router

Admin State : UP

External Network : linuxtopic-external # select using drug-down

After Press “Create Router” Button look like

Now Add Interface :

Click Router “linuxtopic-router”  press Interface tab and again press “Add Interface” button

Subnet: Select from Drug down button

IP Address: Optional you can leave blank

Press “Submit”, Output Like

Ping your External Gateway :

Network Topology :

Go to → Project → Network →Network Topology

End of Network Configuration part 2

End of Part-2 ####

Openstack Mitaka 5 : 

Part 1: OpenStack Mitaka 5 installation in CentOS 7

Part 2: Network Configuration in OpenStack

Part 3: Network & Router configuration using Dashboard

Part 4: Create Project, Image, Volume & Instance

Part 5: Instance Snapshot & Boot from Volume

Part 6: Autostart OpenStack Instance Setting

Part 7: Extend Volume Size