Upgrade Ambari Server

Follow the below steps to upgrade the Ambari server.

Stop Infra-solr Service

Stop the Infra-solr Service from Ambari-UI.

Stop Ambari Server and Agents

Stop Ambari Server

ambari-server stop

Stop Agents

Stop Ambari-agent on every cluster nodes.

ambari-agent stop

Back up Ambari Database

Take the Ambari-server backend database backup from the server host.

DB Backup Commands

mkdir /tmp/ambari-server_db_bckp

mysqldump --databases ambari > /tmp/ambari-server_db_bckp/ambari_mysql_bckp.sql

The upgraded version Ambari-2.7.8.2-2 supports only Python 2. Please ensure Python 2 is installed and configured on all cluster nodes before proceeding with the upgrade.

Verify the Python Version

python -V

Response: Python 2.7.x.

Add Ambari Repo on Cluster Nodes

Back up the Old Ambari Repository

mv /etc/yum.repos.d/ambari.repo /tmp/

Retrieve the latest Ambari repository details from Accessing Acceldata Repositories and add it to all cluster nodes.

List the existing Ambari packages

On RHEL

rpm -qa | grep ambari

On Ubuntu

apt list ambari-*

Example Output (if the current Ambari version is 2.7.6.0-1):

ambari-infra-solr-2.7.6.0-1.noarch

ambari-agent-2.7.6.0-1.x86_64

ambari-server-2.7.6.0-1.x86_64

ambari-infra-solr-client-2.7.6.0-1.noarch

Remove the Existing Ambari Packages

From the Ambari Server node, remove the installed packages before upgrading:

On RHEL

yum remove ambari-server

On Ubuntu

apt remove ambari-server

Note

• Adjust the package names based on the installed versions on each node.
• You can verify installed packages before removal using:

On RHEL

rpm -qa | grep ambari

On Ubuntu

apt list ambari-*

Make sure the Amabri packages are not installed.

Install Ambari packages

Install the latest Ambari-server only on ambari-server node.

Server Node

For RHEL

yum clean all

yum install ambari-server -y

For Ubuntu

apt clean

 apt update

 apt install ambari-server -y

Ambari Server Configuration Files Restore

Restore the configuration files backed up at step4 (Backup Taken in step 4).

Restore ambari.properties File

cp conf_12_02_25_16_52.save/ambari.properties  conf/

When prompted, enter 'y' to confirm.

cp: overwrite 'conf/ambari.properties'? y

Restore passwd.dat File

cp /etc/ambari-server/conf_12_02_25_16_52.save/password.dat /etc/ambari-server/conf/password.dat

Ambari Server Schema Upgrade

Before upgrading, ensure a database backup has been taken (as mentioned in Step 6).

Run the Ambari Server upgrade command:

ambari-server upgrade -v

Response when prompted:

Ambari Server configured for MySQL. Confirm you have made a backup of the Ambari Server database [y/n] (n)? y

​

Enter 'y' to confirm.

After the successful completion, you must see the following message.

Ambari Server 'upgrade' completed successfully.

Start Ambari-server

ambari-server start

Once started, verify that the Ambari UI is accessible using the same URL as before.

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Verify Ambari Version

Verify the upgraded Ambari version in admin->about on top right corner in Ambari UI.

The Ambari version is upgraded successfully.