Installing OpenStack Icehouse On RHEL 7

The public “release candidate” of RHEL 7 (Red Hat Enterprise Linux) came out yesterday, and I decided to take a shot at installing the latest OpenStack RDO on it. The install was smooth, and surprisingly easy. To try it out yourself, follow the steps below.

Install RHEL 7

Grab the RHEL 7 Release Candidate from here [ Note: You must have a current Red Hat Enterprise Linux subscription. ] You can also download an OpenStack / KVM ready qcow2 image to quickly get up and running. Install RHEL 7 on your host server, or in a VM. Make sure to register with:

# subscription-manager register --auto-attach

Update the system:

# yum -y update

Reboot if necessary (kernel update, etc.)

If you are running an instance using the rhel7 qcow2, you should log in and edit root’s ssh authorized_keys. This will allow ssh to root, and generally make things easier when we run packstack:

cloud-user$ sudo -i
# vi /root/.ssh/authorized_keys</em> (remove everything on the first line before "ssh-rsa")

Install EPEL 7

Add the EPEL 7 beta repo on each host with:

# yum -y install http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-0.1.noarch.rpm

Install Icehouse RDO

For each host install the Icehouse RDO repo:

# yum install -y http://rdo.fedorapeople.org/openstack-icehouse/rdo-release-icehouse.rpm

On the controller node run:
# yum install openstack-packstack

Create ssh keys (optional)

If you have multiple hosts you should create root ssh keys, and add them to the authorized_keys for each host. Log into the host where you will be running packstack (the cloud controler node), and execute the following as root:

# ssh-keygen (accept defaults)
# cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys

For each hostN:

# perl -e '$pub=`cat /root/.ssh/id_rsa.pub`; chomp $pub; print "ssh root\@hostN echo \"$pub >>/root/.ssh/authorized_keys\"\n"' | sh

When you are finished test logging into one of the other servers as root. You shouldn’t be prompted for a password.

Run packstack

The best approach to using packstack is to run:

# packstack --gen-answer-file=config.txt

Edit config.txt for your environment, then execute:

packstack --answer-file=config.txt

If you are in a hurry a packstack --allinone will get you up and running all on one node.
Likewise, a packstack --install-hosts=host1,host2 will install on two hosts, making host1 the cloud controller, and host2 a compute node.

packstack will take a while to run, but on a clean install of RHEL 7 you should soon see:

**** Installation completed successfully ******

Congratulations! It’s a cloud!

Check Out Your Cloud!

Source your keystonerc_admin file and verify services are up:

# source /root/keystonerc_admin
# openstack-status

You should see a lot of “active” components, and some additional info. If you have no errors, then it is time to connect to the dashboard!

First, allow connections to the OpenStack dashboard (horizon):

# vi /etc/openstack-dashboard/local_settings

( Add the hosts you like to ALLOWED_HOSTS. Be sure to add the floating ip if you are running this on top of another OpenStack install! )

# systemctl restart httpd

At this point you should be able to log into the dashboard. Go to http://the-address-of-the controller-node/dashboard/ and you should see the below:

Image

Cat the keystonerc_admin created by packstack, and log in as the admin user with the supplied password.

About syncomm

Gregory S. Hayes has 17 years of experience in enterprise IT, specializing in OpenStack, Linux, and Open Source. Currently he is a Lead Cloud Architect with Wells Fargo, principally working on next-generation enterprise cloud initiatives. Previously he served at Red Hat as a Cloud Infrastructure Solutions Architect working with a number of strategic enterprise accounts to enable cloud transformation, workload migration, and cloud governance. Prior to joining Red Hat, he also served as a Senior Cloud Architect for Hewlett-Packard. Gregory has led the way in these organizations with regard to cloud enablement and infrastructure automation. He has been involved in the OpenSource community since 1995, and considers himself an evangelist for the next generation of cloud technologies based on OpenStack.
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