ssh-keygen
enter three times..now you will see keys successfully created.
2. Execute the below command on Ansible management node and copy the public key content:
sudo cat ~/.ssh/id_rsa.pub
copy the above output.
3. Now login to target node, execute the below command to open the file
sudo vi /home/ubuntu/.ssh/authorized_keys
type shift A and then enter now
and paste the key in the above file. please do not delete any existing values in this file.
4. Now go back to Ansible mgmt node, do changes in /etc/ansible/hosts file to include the node you will be installing software. Make sure you add public IP address of target node as highlighted below in red color:
sudo vi /etc/ansible/hosts
[My_Group]
xx.xx.xx.xx ansible_ssh_user=ubuntu ansible_ssh_private_key_file=~/.ssh/id_rsa ansible_python_interpreter=/usr/bin/python3
5. make changes in playbooks as given below,
cd ~/playbooks
sudo vi installJava11.yml
---
- hosts: My_Group
tasks:
- name: Update APT package manager repositories cache
become: true
apt:
update_cache: yes
- name: Install Java using Ansible
become: yes
apt:
name: "{{ packages }}"
state: present
vars:
packages:
- openjdk-11-jdk
6. Execute Ansible playbook
sudo ansible-playbook installJava11.yml
now after successfully executing, enter below command to make sure Java is installed in target node:
java -version
openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment (build 11.0.7+10-post-Ubuntu-2ubuntu218.04)
OpenJDK 64-Bit Server VM (build 11.0.7+10-post-Ubuntu-2ubuntu218.04, mixed mode, sharing)
If you are getting any warning like below:
Upgrade the below utility:
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