Chapter 8. Appendix: Upgrading Ambari Server from 1.2.0/1.2.1/1.2.2 to 1.2.2.4

Upgrading Ambari Server is a ten step manual process.

Stop the Ambari Server and all Ambari Agents. From the Ambari Server host:
```
ambari-server stop
```
From each Ambari Agent host:
```
ambari-agent stop
```

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

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

	Important
	Check your current directory before you download the new repo file to make sure that there are no previous versions of the file. If you do not, and a previous version exists, the new download will be saved with a numeric extension such as `ambari.repo.1`. Make sure that the version you copy is the new version.

Replace the old repo file with the new repo file.

For RHEL/CentOS 5

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

For RHEL/CentOS 6

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

For SLES 11

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

	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.

Local repository installs only: Copy the old stacks definition file (/var/lib/ambari-server/resources/stacks/HDPLocal/1.2.0/repos/repoinfo.xml to a safe place. You will be using it in Step 8.

Upgrade Ambari Server. From the Ambari Server host:

RHEL/CentOS
```
yum upgrade ambari-server
```

SLES

zypper clean --all
zypper up ambari-server

Check for upgrade success:
- As the process runs, the console should produce output similar to this:
```
Setting up Upgrade Process
Resolving Dependencies
--> Running transaction check
---> Package ambari-agent.x86_64 0:1.2.2.3-1 will be updated
---> Package ambari-agent.x86_64 0:1.2.2.4-1 will be an update ...
```
  Once the process is complete, check each host to make sure the new files have been installed:
```
rpm -qa | grep ambari-*
```
- If the upgrade fails, the console should produce output similar to this:
```
Setting up Upgrade Process
No Packages marked for Update
```
Rename the config folder for the Server. The name is changed in the upgrade process and must be changed back.
```
mv /etc/ambari-server/conf.save /etc/ambari-server/conf
```
Upgrade the Ambari Server schema. From the Ambari Server host:
```
ambari-server upgrade
```
Local repository installs only: Take the version of the repoinfo.xml file you copied in Step 3, and copy it back to /var/lib/ambari-server/resources/stacks/HDPLocal/1.2.0/repos/repoinfo.xml.
Upgrade the Ambari Agent on all hosts. From each Ambari Agent host:
- RHEL/CentOS
```
yum upgrade ambari-agent
```
- SLES
```
zypper up ambari-agent
```
Check to see if you have a file named /etc/ambari-agent/conf.save on each Agent host. If you do, rename it back. On each Agent host:
```
mv /etc/ambari-agent/conf.save /etc/ambari-agent/conf
```
Rename the ambari-agent.ini file. This name is changed during the upgrade process and must be changed back. On each Agent host::
```
mv /etc/ambari-agent/conf/ambari-agent.ini.rpmsave /etc/ambari-agent/conf/ambari-agent.ini
```
Upgrade the Nagios addons package and restart the http daemon. On the Nagios host:
- RHEL/CentOS
```
yum upgrade hdp_mon_nagios_addons
service httpd restart
```
- SLES
```
zypper up hdp_mon_nagios_addons 
service apache2 restart
```
Note
If you do not know which host is running the Nagios server, you can use the Services View Summary panel to locate it.
Start the Server and the Agents on all hosts. From the Server host:
```
ambari-server start
```
From each Agent host:
```
ambari-agent start
```

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.

	Note
	If the Install Wizard is displayed, you need to refresh your browser so that it loads the new version of the code. Hold the Shift key down while clicking the refresh button on the browser. If this still does not solve the problem, clear your browser cache and relaunch the browser after restarting Ambari Server.

Re-set the Ambari-Ganglia connection. In Ambari Web.
1. Go to the Services View and select the Ganglia service.
2. Use the Management Header to stop and re-start the Ganglia service.

Legal notices

	Note
	If you do not know which host is running the Nagios server, you can use the Services View Summary panel to locate it.