To enable high availabilty for Hue, you must configure at least two Hue servers, each
on a different host and a load balancer.
For
secure connections, enable TLS/SSL and install
Kerberos. Configuring Hue for high availability
includes configuring Hue, Hive, and Impala.
Prerequisites:
SSH network access to host machines with a Hue Server/Kerberos Ticker Renewer
role.
External database configured for each Hue Server.
Add Hue roles:
Hue HA requires at least two Hue server roles and one Load Balancer
role. If the cluster is authenticating with Keberos, you need one
Kerberos Ticker Renewer on each host with a Hue Server.
Log in to Cloudera Manager and go to the Hue
service.
Go to the Hue service and select
Actions > Add Role
Instances.
Click Hue Server, assign to one or more hosts, and click
OK > Continue.
Click Kerberos Ticket Renewer, assign to each host with a Hue
Server, and click
OK > Continue.
Click Load Balancer, assign to one or more hosts, and click
OK > Continue.
Check each role and select Actions for
Selected > Start
and click Start.
Enable TLS for the Hue load balancer:
Go to
Hue > Configuration
and search on TLS/SSL.
Check Enable TLS/SSL for Hue for the
Hue Server Default Group.
Set other TLS/SSL properties appropriate for your setup. Some to
consider are:
Hue Load Balancer Port - Apache Load Balancer listens
on this port (default is 8889).
Path to TLS/SSL Certificate File - Must be
multi-domain with CN = Load Balancer in PEM format.
Path to TLS/SSL Private Key File - Must be in PEM
format.
