In this lab we will configure two networks and create a router to allow communication between the networks
01. Create Networks
Create a network named “GREEN”Assign 192.168.0.0/24 subnet to GREEN network. First IP address will be reserved as default gateway since Gateway IP address is not defined.Enable DHCP service for this subnet. In that way instance will be able to get IP address automatically from this subnet if this subnet is assigned to the instance. Created a BLUE network and BLUE_SN subnet with the address 192.168.1.0/24 as well
02. Create Instance
Launch 2 instances with the name GREEN_1 and GREEN_2 respectively.
Count value of this will be denoted as number of instances Cirros vm instance allocated Selected predefined m1.nano compute resourceAllocated GREEN_SN subnet for this instanceThis shows GREEN-1 and GREEN-2 instance are taken DHCP IP addresses from the GREEN_SN subnet pool. Additionally created a instance called BLUE with assigning BLUE_SN subnet . According to the above figure BLUE instance has received 192.168.1.80 ip address from BLUE network DHCP scope from the DHCP server.GREEN-1 instance is up and running GREEN-2 instance is up and runningBLUE instance is up and runningGREEN-1 (192.168.0.83) instance able to ping GREEN-2 (192.168.0.249) as both the instances are belongs to same subnet but cannot ping BLUE (192.168.1.80) instance which belongs to different subnet.
03. Review the OpenStack network topology graph
Topology show no IP link between GREEN and BLUE network domain. there must be routing device to be placed in order to communicate between above network domains.
04. Create a router to route packets between the networks
Created router named ROUTER_1Added both GREEN_SN and BLUE_SN subnet to the ROUTER_1. First IP address of each subnet will be allocated to the respective router interface Topology show IP router (ROUTER_1) has been placed to communicate between GREEN-1/GREEN-2 and BLUE instances GREEN-1 instance (192.168.0.83) able to ping BLUE instance (192.168.1.80) after placing ROUTER_1 having both networks connected to it.
05. Investigating an OpenStack networking feature of your choice
I would like to explore little description about Flat Network in Openstack. Flat networks were the network type provided with the original nova networking. With flat networks all projects connect to the same network and the outside world. It is hard to protect internal services that do not need to face the internet. Additionally, security is reduced as all instances share the same network no matter the owner of the instance.
If you needed to enable Flat Networks edit the file: /etc/neutron/plugins/ml2/ml2_conf.ini then add,
type_drivers = vxlan,flat
i tried to install opestack packstack ( Pack stack is openstack all in one repository) and installed in my PC on vmware workstation instance but ended up with errors. need more time to research however with other activities i did not have time to more on research regarding this implementation
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