How to move ambari server from one host to another

Ambari Server Movement

Steps:

1. ambari-server stop & ambari-agent stop (on all hosts)

2. Mysql DB backup:

mysqldump ambari> /root/backup_ambari.sql

3. Install ambari-server on the new host, have the ambari repo in /etc/yum.repos.d

 yum -y install ambari-server

If you need mysql to installed on the same host as well. Then,

yum install mysql-server  

/etc/init.d/mysqld start

Note: {Make sure this installs the right msql version supported by ambari}

To restore the "Ambari" database on new host, login to mysql as root and

Mysql>use mysql;

Mysql> create database ambari;

Mysql> create user ambari identified by 'somepassword';

mysql -u root  ambari < /root/backup_ambari.sql

4. Ambari-server setup
5. ambari-server start
6. Need to run on all hosts of the cluster where agents are running

ambari-agent reset

Ex: ambari-agent reset c249-node3.squadron-labs.com

ambari-agent start