You need to be root to execute - ansible - ansible

Question

I have a lab setup with ansible controller + node and exploring few areas.
I am so far setup an user account named ansible in both machines and enabled ssh keybased authentication
Also setup sudo premissions for the user in both machines
When I try to run the below playbook , It works on the local machine and fails on the other node.
--- #Install Telnet
- hosts: all
name: Install Telnet
become: true
become_user: ansible
become_method: sudo
tasks:
- yum:
name: telnet
state: latest
Output is as follows
`[ansible#host1 playbooks]$ ansible-playbook telnetDeployYUM.yml
PLAY [Install Telnet] ***********************************************************************************************************************************************************************
TASK [Gathering Facts] **********************************************************************************************************************************************************************
ok: [192.168.64.6]
ok: [192.168.64.5]
TASK [yum] **********************************************************************************************************************************************************************************
ok: [192.168.64.5]
fatal: [192.168.64.6]: FAILED! => {"changed": true, "msg": "You need to be root to perform this command.\n", "obsoletes": {"grub2": {"dist": "x86_64", "repo": "#anaconda", "version": "1:2.02-0.64.el7.centos"}, "grub2-tools": {"dist": "x86_64", "repo": "#anaconda", "version": "1:2.02-0.64.el7.centos"}}, "rc": 1, "results": ["Loaded plugins: fastestmirror\n"]}
to retry, use: --limit #/home/ansible/playbooks/telnetDeployYUM.retry
PLAY RECAP **********************************************************************************************************************************************************************************
192.168.64.5 : ok=2 changed=0 unreachable=0 failed=0
192.168.64.6 : ok=1 changed=0 unreachable=0 failed=1
[ansible#host1 playbooks]$
`
I could also manually able to run sudo yum on the failed target as ansible user
I believe sudo set up in correct
[ansible#host2 root]$ sudo whoami
root
Can experts share some insights on what I am missing with respect to my failed machine , Thanks.

Answer 1

Below should work fine
- hosts: all
name: Install Telnet
become: yes
tasks:
- yum:
name: telnet
state: latest
ansible or user through which ansible is getting executed should be in sudoers file.
You are changing your user to ansible which is not required.

Answer 2

Run with -vvvv to see what ansible is doing.
Have you setup ansible in sudoers for password less privilege elevation?
you are getting a message that it is waiting for "escalation prompt". That means when you are running with become, you are failing to become since it needs the password. Make sure your test user is in /etc/sudoers AND you have it marked for that user to NOT need to enter a password when running sudo commands. The entry should end with :NOPASSWD on the line in that file.