Chapter 8. Appendix: Upgrading Ambari to 1.2.5

This process upgrades Ambari Server, Ambari Agents, Nagios and Ganglia. It does not change the underlying Hadoop Stack. This is a fourteen step manual process.

	Note
	You must know the location of the Nagios and Ganglia servers for step 11. Use the Services->Nagios/Ganglia-> Summary panel to locate the hosts on which they are running.

Stop Nagios and Ganglia, using the Ambari Web GUI. From the Services View, select Nagios and use the Management Header to stop it. Do the same for Ganglia.
Stop the Ambari Server and all Ambari Agents. From the Ambari Server host:
```
ambari-server stop
```
From each Ambari Agent host:
```
ambari-agent stop
```
Check to see if you have a conf.save directory for Ambari server and agents. If you do, move them to a back-up location:
```
mv /etc/ambari-server/conf.save/ /etc/ambari-server/conf.save.bak 
```
```
mv /etc/ambari-agent/conf.save/ /etc/ambari-agent/conf.save.bak 
```

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.

	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 is saved with a numeric extension such as `ambari.repo.1`. Make sure that the version you copy is the new version.

Fetch the new repo file and replace the old repo file with the new file:

For RHEL/CentOS 5/Oracle Linux 5

wget http://public-repo-1.hortonworks.com/ambari/centos5/1.x/updates/1.2.5.17/ambari.repo 
cp ambari.repo /etc/yum.repos.d/ambari.repo

For RHEL/CentOS 6/Oracle Linux 6

wget http://public-repo-1.hortonworks.com/ambari/centos6/1.x/updates/1.2.5.17/ambari.repo 
cp ambari.repo /etc/yum.repos.d/ambari.repo

For SLES 11

wget http://public-repo-1.hortonworks.com/ambari/suse11/1.x/updates/1.2.5.17/ambari.repo 
cp ambari.repo /etc/zypp/repos.d/ambari.repo

	Note
	If your cluster does not have access to the Internet, 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:

RHEL/CentOS/Oracle Linux

yum clean all
yum upgrade ambari-server ambari-log4j

SLES

zypper clean
zypper up ambari-server ambari-log4j

Check for upgrade success:
- As the process runs, the console should produce output similar, although not identical, to this:
```
Setting up Upgrade Process
Resolving Dependencies
--> Running transaction check
...
```
  After the process is complete, check each host to make sure the new 1.2.5 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
```
Check to see if you have a folder named /etc/ambari-server/conf.save. If you do, rename it back:
```
mv /etc/ambari-server/conf.save /etc/ambari-server/conf
```
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/Oracle Linux
```
yum upgrade ambari-agent ambari-log4j
```
- SLES
```
zypper up ambari-agent ambari-log4j
```
  Note
  If you get a warning that begins "There are some running programs that use files deleted by recent upgrade" you can ignore it.
Check to see if you have a folder 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
```

Upgrade Ganglia and Nagios:

Upgrade Ganglia Server. From the Ganglia Server host:

RHEL/CentOS/Oracle Linux

yum upgrade ganglia-gmond ganglia-gmetad libganglia
yum erase gweb hdp_mon_ganglia_addons
yum install ganglia-web

SLES

zypper up ganglia-gmond ganglia-gmetad libganglia
zypper remove gweb hdp_mon_ganglia_addons
zypper install ganglia-web

Upgrade Ganglia Monitor. From every host that has Ganglia Monitor installed:
- RHEL/CentOS
```
yum upgrade ganglia-gmond libganglia
```
- SLES
```
zypper up ganglia-gmond libganglia 
```
Upgrade Nagios. From the Nagios Server host:
- RHEL/CentOS/Oracle Linux
```
yum upgrade nagios
yum upgrade hdp_mon_nagios_addons
yum erase nagios-plugins-1.4.15
yum install nagios-plugins-1.4.9
```
  The 1.4.9 version of the plugin may already be installed. In this case, the second step is a no-op.
- SLES
```
zypper up nagios
 zypper up hdp_mon_nagios_addons
zypper remove nagios-plugins-1.4.15
zypper install nagios-plugins-1.4.9
```
  The 1.4.9 version of the plugin may already be installed. In this case, the second step is a no-op.

Start the Ambari Server and 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

	Important
	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 you have problems, clear your browser cache manually and restart Ambari Server.

Use the Admin name and password you have set up to log in.

Start the Ganglia and Nagios services and restart MapReduce. In Ambari Web.
1. Go to the Services and select each service.
2. Use the Management Header to start or stop and re-start each service.

Legal notices

	Note
	If you get a warning that begins "There are some running programs that use files deleted by recent upgrade" you can ignore it.