DevOps Classroomnotes 09/Jan/2023

Ansible Contd…

Ansible loops and variables in inventory

we are supposed to install the following softwares into a node
- git
- tree
- nano
- net-tools
Adding lists to ini inventory formats and executing playbook
inventory

[local]
localhost packages='["git", "nano", "tree", "net-tools"]'

playbook

---
- name: install utilities
  hosts: all
  tasks:
    - name: install utilities
      ansible.builtin.package:
        name: "{{ item }}"
        state: present
      become: yes
      loop: "{{ packages }}"

lets try writing the inventory in yaml. Refer Here for the changes
inventory in ini file

[appservers]
20.121.55.193 java_package_name=java-11-openjdk-devel
172.31.24.180 java_package_name=openjdk-11-jdk

[appservers:vars]
user_name=tomcat
group_name=tomcat
user_home=/opt/tomcat
user_shell=/bin/false
tomcat_version="10.1.4"
tomcat_major_version="10"
tomcat_service_name=tomcat.service

same inventory in yaml file

---
all:
  children:
    appservers:
      hosts:
        20.121.55.193:
          java_package_name: java-11-openjdk-devel
        172.31.24.180:
          java_package_name: openjdk-11-jdk
      vars:
        user_name: tomcat
        group_name: tomcat
        user_home: /opt/tomcat
        user_shell: /bin/false
        tomcat_version: "10.1.4"
        tomcat_major_version: "10"
        tomcat_service_name: tomcat.service

It is not a good idea to define variables in inventory, variables should be treated seperately. Optimizing inventory Refer Here and Refer Here for organizing group and host variables.
Refer Here for the changes done and screen shot below for output