@abhinav_joshi  its related to permissions for root user.  First, you should avoid root user.  Also recommend use FQDNs, not ips.   It seems that user has perms on the localhost ip, but maybe not when connecting from the external IP.    If you make a specific user, you would need to grant them access to a database from a specific host.  For example:   CREATE DATABASE hive; CREATE USER 'hive'@'hdp3.cloudera.com' IDENTIFIED BY 'hive'; GRANT ALL PRIVILEGES ON *.* TO 'hive'@'hdp3.cloudera.com' WITH GRANT OPTION; FLUSH PRIVILEGES;   ... View more

@math23 I have confirmed your version of ambari is not able to install management packs. The error you are getting is indicating "install-mpack" is not an allowed ambari-server command. You will need to use a newer version of Ambari/HDP.   If you really have to install in old version you can also deliver a custom service to ambari without a management pack (.tar.gz). You can unpack the contents and copy the airflow service into right ambari version folder directly.   I don't have the steps to do that for airflow, but some other examples of how to get the version, and what the service folder contents look, are including in these custom services:   https://github.com/EsharEditor/ambari-hue-service https://github.com/abajwa-hw/ambari-flink-service         ... View more