Cloud Operating System

Exercise #1

Install DevStack

$ git clone https://github.com/openstack-dev/devstack.git
$ cd devstack
$ ./stack.sh

Start Your Engine

Log In

Launch Your First Instance

Say Hello to the World

Make Yourself a Persistent Home

Check Out Existing Block Devices

$ find /dev/ -type b | grep vd
/dev/vda

Add a New Volume

Attach the New Volume

Check Out Existing Block Devices Again

$ find /dev/ -type b | grep vd
/dev/vda
/dev/vdb  <--- There you are!

Partition the New Volume

$ sudo fdisk /dev/vdb
...
Command (m for help): p

Disk /dev/vdb: 1073 MB, 1073741824 bytes
...

Command (m for help): n
...
Select (default p): <Enter>
Partition number (1-4, default 1): <Enter>
First sector (2048-2097151, default 2048): <Enter>
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-2097151, default 2097151): <Enter>
Using default value 2097151

Command (m for help): p

...
Device Boot     Start   End         Blocks      Id      System
/dev/vdb1       2048    2097151     1047552     83      Linux

Command (m for help): w

Create filesystem and Mount the New Volume

$ sudo mkfs.ext4 /dev/vdb1
...
$ sudo mount /dev/vdb1 /mnt
$ mount
/dev/vdb1 on /mnt type ext4 (...)

Build a Better Network

Destruction Before Construction

$ cd devstack
$ ./unstack.sh

Enable Neutron

Add the following into localrc file

# enable neutron
disable_service n-net
enable_service q-svc
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service neutron

Start Your Engine Again

$ ./stack.sh

Exercise #2

OpenStack Havana released on 10/17, 2013, so we're moving on to Havana. Before started the main exercises, there are a few things we need to do first.

First, stop devstack and pull down the latest devstack

$ cd devstack
$ ./unstack.sh
$ git pull

Second, upgrade openvswitch. The version of openvswitch package in Ubuntu 12.04 is too old to work properly with the latest Neutron.

$ echo 'deb http://ubuntu-cloud.archive.canonical.com/ubuntu precise-updates/havana main' | sudo tee /etc/apt/sources.list.d/cloud-archive.list
$ sudo apt-get update
$ sudo apt-get install openvswitch-common openvswitch-datapath-dkms openvswitch-switch
$ sudo reboot

Multi-node Setup

Normally, a production OpenStack platform would consist of three kinds of nodes, controller node(s), network node(s) and compute nodes. In the previous exercise, we have built up a single node OpenStack setup. Let's call this node the controller node in this document, though it also acts as a network node and a compute node. And now, we're going to add an extra compute node.

Configure the Contoller Node

Modify your localrc like this, and replace <replaceme> with your settings.

# localrc

DATABASE_PASSWORD=<password>
RABBIT_PASSWORD=<password>
SERVICE_TOKEN=<password>
SERVICE_PASSWORD=<password>
ADMIN_PASSWORD=<password>

# enable neutron
disable_service n-net
enable_service q-svc
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service neutron

MULTI_HOST=1

Q_PLUGIN=ml2
ENABLE_TENANT_TUNNELS=True

HOST_IP=<ip address of this node>
VNCSERVER_LISTEN=$HOST_IP
VNCSERVER_PROXYCLIENT_ADDRESS=$HOST_IP

And start devstack

$ cd devstack
$ ./stack.sh

Setup an Extra Compute Node

The host environment of the extra compute node is just the same as the original node. It depends on how you want it to be setup. For example, if you install the controller node as an VM, you can simply clone a new one from it, and replace the ip and hostname with a different one. Also, don't forget to upgrade the openvswitch just like what we did above for the controller node.

Configure the New Compute Node

Modify your localrc like this, and replace <replaceme> with your settings.

# localrc

DATABASE_PASSWORD=<password>
RABBIT_PASSWORD=<password>
SERVICE_TOKEN=<password>
SERVICE_PASSWORD=<password>
ADMIN_PASSWORD=<password>

MULTI_HOST=1

SERVICE_HOST=<ip address of the controller node>
GLANCE_HOSTPORT=$SERVICE_HOST:9292
MYSQL_HOST=$SERVICE_HOST
RABBIT_HOST=$SERVICE_HOST
Q_HOST=$SERVICE_HOST
MATCHMAKER_REDIS_HOST=$SERVICE_HOST

ENABLED_SERVICES=n-cpu,n-api,n-novnc,rabbit,q-agt,neutron

Q_PLUGIN=ml2
ENABLE_TENANT_TUNNELS=True

HOST_IP=<ip address of this node>
VNCSERVER_LISTEN=$HOST_IP
VNCSERVER_PROXYCLIENT_ADDRESS=$HOST_IP

And start devstack

$ cd devstack
$ ./stack.sh