Install on RHEL 6

If you plan to install Eucalyptus HA, we recommend that you install each Eucalyptus component on a separate host. For example, if you are installing CLC, Walrus, CC, and SC, you will install each of these components on a separate host. You will also install each secondary component (the secondary CLC, Walrus, CC, and SC) on a separate host. In this case, you will need eight machines. Each additional cluster needs four more machines for its CCs and SCs. This does not account for NCs, which are not redundant.

To install Eucalyptus on servers running RHEL 6:

Configure the Eucalyptus package repository on each host that will run a Eucalyptus component:
```
yum install http://downloads.eucalyptus.com/software/eucalyptus/3.1/rhel/6/x86_64/eucalyptus-release-3.1.noarch.rpm
```
Configure the Euca2ools package repository on each host that will run a Eucalyptus component or Euca2ools:
```
yum install http://downloads.eucalyptus.com/software/euca2ools/2.1/rhel/6/x86_64/euca2ools-release-2.1.noarch.rpm
```
Configure the EPEL package repository on each host that will run a Eucalyptus component or Euca2ools:
```
yum install http://downloads.eucalyptus.com/software/eucalyptus/3.1/rhel/6/x86_64/epel-release-6.noarch.rpm
```

Configure the ELRepo repository on each host that will run Walrus:

yum install http://downloads.eucalyptus.com/software/eucalyptus/3.1/rhel/6/x86_64/elrepo-release-6.noarch.rpm

Tip

If you are a Eucalyptus subscriber, you should have received an rpm package file that you will need to install. If you are not a Eucalyptus subscriber, skip this step.

Install the Eucalyptus subscription package on each host that will run a Eucalyptus component:

yum install eucalyptus-enterprise-release-3.1*.noarch.rpm

Install the Eucalyptus cloud controller software on each planned CLC host:
```
yum groupinstall eucalyptus-cloud-controller
```

Note

Clouds that use the VMware hypervisor do not have NCs; if you plan to use VMware then skip this step.

Install the KVM driver appropriate to your hardware.
For systems with Intel processors:
```
modprobe kvm_intel
modprobe vhost_net
```
For systems with AMD processors:
```
modprobe kvm_amd
modprobe vhost_net
```
Restart libvirtd by running service libvirtd restart
Install the Eucalyptus node controller software on each planned NC host:
```
yum install eucalyptus-nc
```

Install the software for the remaining Eucalyptus components. The following example shows most components being installed on the same host. We recommend that you use different hosts for each component:
```
yum install eucalyptus-cc eucalyptus-sc eucalyptus-walrus
```

Tip

If you do not have a Eucalyptus subscription and don't plan to use Eucalyptus's SAN capabilities, skip this step.

Install the Eucalyptus SAN adapter software on each SC host:

yum install eucalyptus-enterprise-storage-san

After you have installed Eucalyptus, test multicast connectivity between each CLC and Walrus, SC, and VMware broker host.
1. Run the following receiver command on the CLC:
```
java -classpath /usr/share/eucalyptus/jgroups-2.11.1.Final.jar org.jgroups.tests.McastReceiverTest -mcast_addr 224.10.10.10 -port 5555
```
2. Once the receiver command blocks, simultaneously run the following sender command on each Walrus host:
```
java -classpath /usr/share/eucalyptus/jgroups-2.11.1.Final.jar org.jgroups.tests.McastSenderTest -mcast_addr 224.10.10.10 -port 5555
```
  The two applications should be able to connect and arbitrary lines entered on the sender should appear on the receiver.
3. Repeat the previous step on each SC host and VMware broker host
4. If you are installing an HA environment, repeat these tasks with the second CLC.

Your installation is complete.

You are now ready to Configure Eucalyptus.