Cloudera Manager fails to add hosts

Question

I\'ve followed the installation procedure from here and when I reach the Inspect Role Assignments stage I only see one managed host: localhost.localdo

Answer 1

I also had a similar problem. Cloudera Manager was able to install all the components but the hosts wasn't showing up in the managed hosts list.

In my case the ip/dns name configuration was fine. I was able to do lookups successfully. Later I realized that Cloudera needs bunch of ports to manage the nodes. Also additional ports will be needed for various Hadoop services. Just to see if the problem is because of this, you can turn off the firewall temporarily. If that's the issue, refer to Cloudera's documentation for list of ports. Currently it's located in: https://ccp.cloudera.com/display/ENT4DOC/Configuring+Ports+for+Cloudera+Manager