Upgrading ambari 2.0 to 2.1 (HDP)

1. stop Ambari Metrics
2. ambari-server stop
3. all hosts
   1. ambari-agent stop
   2. cd /etc/yum.repos.d
   3. rm -f ambari* HDP*
   4. wget -nv http://public-repo-1.hortonworks.com/ambari/centos6/2.x/updates/2.1.0/ambari.repo -O /etc/yum.repos.d/ambari.repo
4. yum clean all; yum -y upgrade ambari-server
5. Confirm there is only one ambari-server*.jar file in /usr/lib/ambari-server. If there is more than one JAR file with name ambari-server*.jar, move all JARs except ambari-server-2.1.0.*.jar to /tmp before proceeding with upgrade
6. all hosts
   1. yum -y upgrade ambari-agent
   2. rpm -qa | grep ambari-agent
7. ambari-server upgrade
8. ambari-server start
9. ambari-agent start (each host)
10. http://<your.ambari.server>:8080
11. restart services
12. note that you may have to perform other processes to complete the upgrading which depends on your cluster configuration