openstack in cirros with devstack

Openstack Single Node Deployment with Devstack

Devstack allows to deploy OpenStack infrastructure on a single VM or physical machine to test some hacks before facing the beast.

To summarize what you'll be going through, four main steps are needed:

1-Clone the Devstack Git repository
2-Configure local.conf (Optional)

3-Install with ./script.sh

4-Launch a Cirros instance

5-Access the launched instance

6-Launch Devstack after rebooting

tl;dr: at the end of this tutorial, you'll be able to access a Cirros instance launched on devstack, the whole environment being deployed on a VMware Workstation 10 VM. The Networking is based on nova-network (flat networking as opposed to VLAN networking). The configuration is done via Horizon Dashboard.

Cirros Instance on Devstack

 Hark!

VMware Workstation virtual machine configuration:

Update and upgrade the freshly installed Ubuntu 12.04 system:

Install Git:

Clone the Devstack repo:

Move into the devstack directory:

Check the host IP:

Create a local.conf file:

Launch stack.sh:

 

If the installation fails, re-run ./stack.sh script. If you receive the following message, run ./unstack.sh then ./stack.sh:

Check the network interfaces:

Launch the Horizon dashboard and login as admin/devstack:

 Display Access&Security tab and create a new Security group:

 This new group will allow ping and ssh to the instance: 

 Select Manage Rules:

 Add the adequate rules:

 Add the ICMP rule:

 Add the SSH rule:

 Check the rules:

Access the Access&Security tab again to create a key pair:

Generate a new key pair to use when you ssh to the instance:

Save the key pair:

Check the newly created key pair:

Manage floating IPs:

Allocate floating IP to project:

Check the allocated public pool:

Access the instances tab to create a new VM:

Configure the instance details:

Configure the security group and key pair associated with the VM the click launch:

Check the newly launched instance:

Let's take a look at the networking at this point (see Understanding FlatNetworking for more details):

 

Let's check the br001 interface details:

The eth0 IP address belongs to the local network IP address space:

Associate a floating IP:

The instance have now the IP associated:

Access the VM console:

SSH into the VM with cirros username and cubswin:) password:

First attempt to SSH with the key pair fails due to permissions 0644 being "too open":

 Second attempt with different permissions:

Let's ping the outside world from the Cirros instance:

The ping journey (see Network Troubleshooting for more details):

The vnet interface details:

The virbr0 interface (See Network Management Architecture for more details)

Compute resources overview tab:

After a reboot, move into the devstack directory and launch ./rejoin_stack.sh script