How To Install Java Using Ansible PlayBook ?

Last Updated : 02 Apr, 2024

In today's dynamic IT landscape, effective management and automation of software installations across various servers are pivotal for maintaining consistency, dependability, and versatility. Ansible, an open-source automation tool, has acquired huge popularity for its simplicity and flexibility in automating different IT tasks, including software provisioning, configuration management, and application deployment.

Java is necessary for running a wide range of applications, web servers, and enterprise software solutions because it is one of the most widely used programming languages and computing platforms. The process of manually installing Java on multiple servers can be time-consuming and error-prone. Be that as it may, with Ansible, you can streamline out and automate the establishment of Java across your infrastructure easily.

This guide intends to give a comprehensive walkthrough on the best way to use Ansible to introduce Java seamlessly on target servers. We'll go over everything you need to know about installing Java with Ansible playbooks, from the definitions of key terms to a step-by-step procedure.

Primary Terminologies

Ansible

Ansible is an automation tool for IT orchestration, configuration management, and application deployment that is open-source. It enables users to efficiently automate complicated workflows across multiple servers by defining automation tasks in playbooks using a simple language based on YAML.

Playbook

In Ansible, a playbook is a YAML file that contains a set of tasks that define the system's desired state. Playbooks are used to automate software installation, server configuration, and application deployment, among other IT tasks. They empower users to depict the means expected to accomplish a specific result and can be executed successively or simultaneously across numerous hosts.

Java

Java is a programming language that is used a lot and a computing platform that is known for being portable, secure, and scalable. Web applications, mobile apps, enterprise software, and embedded systems all make use of it frequently. Java programs are compiled into bytecode, which can run on any device or platform with a Java Virtual Machine (JVM) introduced.

OpenJDK

OpenJDK is a Java Platform, Standard Edition (Java SE) implementation that is freely available. It gives a free and open-source Java Improvement Unit (JDK), including compilers, runtime libraries, and improvement devices. OpenJDK is generally utilized in both business and non-business projects and servers in as the reference implementation of the Java platform.

YAML

YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly utilized for configuration files, data exchange, and defining structured data in Ansible playbooks. By employing key-value pairs and indentation to represent hierarchical data structures, YAML files are machine- and human-friendly to read and write. Ansible playbooks, inventory records, and configuration files are normally written in YAML format.

Step-By-Step Process To Install Java using Ansible Playbook?

Step 1: Launch an instance

Go to Amazon console management and log in with your credentials or create a new account and go to the EC2 dashboard.
Now launch two Instances because Ansible is a master-slave configuration management tool. So We are working from the master node and installing Python in the slave node. In the master node, we are defining the host details of the slave node.

Now connect with terminal like git bash,powershell, putty, command prompt and so on. By using SSH Command

putty

Step 2: Install Ansible

Now Install Ansible on your control node (local machine). By using following command

 sudo amazon-linux-extras install ansible2

install ansible

Step 3: Create a playbook

Now create a playbook with .yml extension. Here .yml indicates that YAML scripts

sudo vi <filename.yml>

Here is the playbook script to install JAVA using ansible playbook

- name: Install Java on Amazon Linux
  hosts: all
  become: yes
  tasks:
    - name: Install Java
      yum:
        name: java-1.8.0-openjdk
        state: present

install java

Step 4: Setting up Host Permission for slave node

Now move to ansible directory path by using cd command. In that ansible directory there is a file is name is HOST. In that host file we can provide host details. Following command navigate to ansible path

cd /etc/ansible/

vi package.yaml

Now open that Host file by using following command. Without sudo we cannot open that file

sudo vi host

Inside this host file we providing host details that means our slave node details like Private IP Address, username and keypairs details because to install our java package. Host file means its like a destination path t install java.

hostfile

Ensure that our instance keypair's was downloaded in local machine that is our master node. We can download by using following command

 scp -i keyapir.pem keypair.pem ec2-user@public-IP-address:/home/ec2-user(path to download)

After that change permissions to that keypair file because security purpose only giving read permissions. By using following command

sudo chmod 400 <keypair.pem>

chmod 400

Now execute ansible ping command to verify that our slave node connected or not

ansible ping -m all

ansible all -m ping

Step 5: Running the Playbook

Now run ansible-playbook command to run your playbook, specifying the playbook file and target hosts. By using following command

ansible-playbook <filename.yml>

To verify whether JAVA installed or not by using following command. Check in slave node because we installed in slave node.

java -version

java -version

Conclusion

There are numerous advantages to using Ansible to install Java across your infrastructure, including scalability, consistency, and automation. By utilizing Ansible playbooks, you can streamline the deployment process, ensure that all servers have the necessary Java variant introduced, and limit manual blunders. All through this guide, we've investigated the primary terminologies related with Ansible and Java, illustrated a step by step process for introducing Java utilizing Ansible playbooks, and gave experiences into best practices and contemplations.

Mastering tools like Ansible becomes increasingly valuable as organizations continue to adopt automation and DevOps practices. With Ansible, you can introduce Java as well as deal with your whole IT infrastructure efficiently, from configuration management to application deployment. You can automate repetitive tasks, accelerate software deployments, and maintain consistency across your infrastructure by utilizing the power of Ansible. This will ultimately lead to an increase in productivity and a decrease in the cost of operations.

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