Configuration Management (CM)

• There are two types of CM
  • Pull based CM
  • Push Based CM
• Direction of Communication
  • PULL => Node to CM server
  • Push => CM Server to Node
    
• What is required in PULL Based CM?
  • Agent needs to be installed with necessary credentials to connect to CM Server
• What is required in Push Based CM
  • List of nodes (inventory)
  • Credentials to login into node
    
• Popular tools
  • Pull:
    • Chef
    • Puppet
  • Push:
    • Ansible
    • SaltStack
      

Ansible

• Refer Here for official docs

Architecture and workflow

• Basic workflow
  
• Ansible control node can execute desired state on nodes using
  • adhoc commands
  • playbooks
• Playbooks are YAML files.

Exercises

• Install necessary softwares Refer Here
• YAML and JSON Tutorial Refer Here