Upgrading release versions

Prerequisite

• Release Notes
• Changelog

Procedure

• Backup Database schema and data, if it's being changed
• Stop relevant services
• Uninstall the applications if required
• Install the applications if required
• Restore the Database schema and data

Structure

e.g. upgrade.sh

#!/bin/bash

# Taking the backup and uninstalling deprecated apps
ansible-playbook -i upgrade_scripts/inventory/hosts upgrade.yml --tags backup, uninstall

# Provisioning & Deploying release-version, only apps that changed
ansible-playbook -i inventory/hosts provision.yml --tags mysql, nginx

# Restoring previous data
ansible-playbook -i upgrade_scripts/inventory/hosts upgrade.yml --tags restore

folder structure

╰─$ tree upgrade_scripts 
upgrade_scripts
├── inventory
│   └── hosts
├── roles
│   ├── mysql_backup
│   │   ├── defaults
│   │   │   └── main.yml
│   │   ├── files
│   │   ├── handlers
│   │   │   └── main.yml
│   │   ├── meta
│   │   │   └── main.yml
│   │   ├── README.md
│   │   ├── tasks
│   │   │   └── main.yml
│   │   ├── templates
│   │   ├── tests
│   │   │   ├── inventory
│   │   │   └── test.yml
│   │   └── vars
│   │       └── main.yml
│   └── mysql_restore
│       ├── defaults
│       │   └── main.yml
│       ├── files
│       ├── handlers
│       │   └── main.yml
│       ├── meta
│       │   └── main.yml
│       ├── README.md
│       ├── tasks
│       │   └── main.yml
│       ├── templates
│       ├── tests
│       │   ├── inventory
│       │   └── test.yml
│       └── vars
│           └── main.yml
└── upgrade.yml