Configuring IP Tables for Ambari Installation on CentOS, Access Denied

[#1]

Hi Everyone, I am installing HDP2.6.0.0 onto a 3 node AWS cluster running CentOS Linux 7 x86_64 HVM EBS 1704_01.

Got stuck on Configuring iptables step in the manual https://docs.hortonworks.com/HDPDocuments/Ambari-2.6.0.0/bk_ambari-installation/content/configuring_...

Here is the error:

$ sudo systemctl disable firewalld

Failed to execute operation: Access denied

Also tried this (same w/out sudo):

$ systemctl disable firewalld

==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-unit-files ===

Authentication is required to manage system service or unit files.

Authenticating as: Cloud User (centos)

Password:

==== AUTHENTICATION COMPLETE ===

Failed to execute operation: Access denied

Any idea why is it access denied? What is the right way to do this step?

[#2]

@Michael O

The problem is clearly a permission issue "Access Denied"

The AWS user is usually ec2-user or ubuntu

To add a temporary password to a root user:

1.Connect to your EC2 instance running Linux by using SSH.

2. Assume root user permissions by running the following command:

<em>$ sudo su</em>

3. Create a password for the root user by running the following command:

<em># passwd root </em>

4. When prompted, enter your temporary root password, and then enter it again to confirm it.

Note: You must run this command as the root user.

After you complete the task, delete the root password by running the following command:

<em># passwd –d root</em>

Hope that helps

[#3 · Accepted solution]

@Geoffrey Shelton Okot found the solution. Firewalld was not installed on the image I am using.

After running the command from this link, everything worked. It was not the permissions issue, firewalld was not on the image. Centos has an unclear way of explaining this.

https://docs-old.fedoraproject.org/en-US/Fedora/19/html/Security_Guide/sec-Check_if_firewalld_is_ins...

Thanks for taking a look at this.

Best