Chapter 7. Appendix: Upgrading Ambari Server from 1.2.0 to 1.2.1

Upgrading Ambari Server is an eight step manual process.

Get the new Ambari bits. Use wget to fetch the repository file and replace the old repo file with the new repo file.

Fetch the new repo file:

For RHEL/CentOS 5

wget http://public-repo-1.hortonworks.com/ambari/centos5/1.x/GA/ambari.repo

For RHEL/CentOS 6

wget http://public-repo-1.hortonworks.com/ambari/centos6/1.x/GA/ambari.repo

For SLES 11

wget http://public-repo-1.hortonworks.com/ambari/suse11/1.x/GA/ambari.repo

Replace the old repo file with the new repo file:

For RHEL/CentOS 5

cp ambari.repo /etc/yum.repos.d

For RHEL/CentOS 6

cp ambari.repo /etc/yum.repos.d

For SLES 11

cp ambari.repo /etc/zypp/repos.d

	Note
	If your cluster does not have access to the Internet, you need to set up a local repository with this data before you continue. See Configure the Local Repositories for more information.

Upgrade Ambari Server. From the Ambari Server host:

SLES

zypper clean --all
zypper up ambari-server

Upgrade the Ambari Server schema. From the Ambari Server host:
```
ambari-server upgrade
```
Upgrade the Ambari Agent on all hosts. From each Ambari Agent host:
- RHEL/CentOS
```
yum upgrade ambari-agent
```
- SLES
```
zypper up ambari-agent
```
Update Ambari Server hostname in Agent configuration file. On each Agent host, open /etc/ambari-agent/conf/ambari-agent.ini and edit this property:
```
hostname = {your.ambari.server.hostname}
```
Start the Server and the Agents on all hosts. From the Server host:
```
ambari-server start
```
From each Agent host:
```
ambari-agent start
```
Re-set the Ambari-Ganglia connection.
1. Open Ambari Web. Point your browser to http://{your.ambari.server}:8080
  Use the Admin name and password you have set up to log in.
2. Go to the Services View and select the Ganglia service.
3. Use the Management Header to stop and re-start the Ganglia service.