CCNA 3 Supplemental Module 1.6

CCNA 3 Supplemental Module 1.6

1. SUPPLEMENTAL MODULE

   • ANSIBLE
     • INTRODUCTION TO ANSIBLE
       • TOOL FOR INFRAESTRUCTURE AS CODE (IaC)
       • WHATS IS IaC ?
         • 1 MANAGE AND PROVISION INFRASTRUCTURE AS CODE USING HUMAN-READABLE
           • RATHER THAN PHYSICAL HARDWARE CONFIGURATION
           • OR INTERECTIVE CONFIGURATION COMMANDS OR TOOLS
         • CONCEPT IN MODERN IT
       • HOW CAN WE USE IT ?
         • ALLOWS MANAGER YOUR NETWORK THROUGH CODE
           • USING SIMPLE HUMAN READABLE PLAYBOOKS
             • THIS APPROACH ENABLE AUTOMATE AND VERSION CONTROL YOUR CONFIGURATIONS
       • ANSIBLE IS AN OPEN SOURCE AUTOMATION TOOL AND USES A SIMPLE HUMAM READABLE CALLED
         • YAML (YET ANOTHER MARKUP LANGUAGE) TO DESCRIBE AUTOMATION TASKS
       • OPERATES IN AN AGENTLESS MANNER , WHICH MEANS IT DOES NOT REQUIRE ANY SPECIALIZED SOFTWARE INSTALLED MANAGED DEVICES
         • THIS ALLOWS OPERATES THROUGH STANDARD PROTOCOLS LIKE SSH
     • INFRAESTRUCTURE AS CODE (IaC)
       • TRADITIONALLY ADMIN NETWORKS HAVE USE CLI TO CONFIGURE CISCO IOS DEVICES
       • WITH THE EMERGENCE OF THE IAC , YOU CAN CREATE SIMILAR CONFIGURATION BE USED TO AUMATICALLY SET UP , MODIFY AND MANAGE VARIOUS DEVICES
         • SERVERS
         • ROUTERS
         • SWITCHES
         • CLOUD RESOURCES
         • THE DEFINITION FILES PERFORM THA SAME FUNCTIONs AS CISCO IOS COMMANDS
           • THIS ELIMINATE THE NEED MANUALLY CONFIGURATIONS INDIVIDUAL
       • ANSIBLE UTILIZES YAML FOR ITS PLAYBOOK FORMAT
         • THIS IS VERY HUMAN READABLE AND EASY TO UNDESTAND
         • ORGANIZE TASKS IN A SIMPLE LIST FORMAT
       • TERRAFORM UTILIZES ITS OWN HASHICORP CONFIGUARATION LANGUAGE (HCL)
         • IS ALSO DESIGNATED TO BE HUMAN READABLE
           • HOWEVER , IT IS SPECIFICALLY STRUCTURED TO PROVISION INFRAESTRUCTURE COMPONENTS
     • ANSIBLE ARCHITECTURE
       • IN ADDITION , A PRODUCTION INSTANCE OF ANSIBLE WILL HAVE A VARIETY OF APIS CONFIGURED AND PLUGINS INSTALLED TO PROVIDE
         • DEVICE CONNECTION, LOGGING, EMAIL, AND ANY OTHER ENHANCEMENTS THE NETWORK ADMINISTRATOR WANTS TO ENABLE.
       • TYPICAL WORKFLOW
         • 1. THE ADMIN CREATES PLAYBOOKS
           • AND DEFINES THE INVENTORY OF HOSTS.
         • 2. PLAYBOOKS AND INVENTORIES
           • ARE PROCESSED BY ANSIBLE'S CORE, WHICH INCLUDES MODULES, APIS, AND PLUGINS.
         • 3 . ANSIBLE CAN OPTIONALLY INTERACT BI-DIRECTIONALLY WITH EXTERNAL SYSTEMS:
           • CLOUD PROVIDER
             • ANSIBLE CAN INTERFACE WITH CLOUD SERVICES TO PROVISION, MANAGE, AND SCALE CLOUD RESOURCES SUCH AS VIRTUAL MACHINES, STORAGE, AND NETWORKS.
           • CMDB (CONFIGURATION MANAGEMENT DATABASE )
             • IS A REPOSITORY THAT ACTS AS A DATA WAREHOUSE FOR IT INSTALLATIONS.
             • ANSIBLE CAN USE THE CMDB TO GATHER DETAILED INFORMATION ABOUT THE IT ENVIRONMENT, UPDATE CONFIGURATION STATES, AND ENSURE CONSIST
         • 4 . ANSIBLE EXECUTES THE DEFINED TASKS ON THE SPECIFIED HOSTS
           • (ROUTERS, SWITCHES, AND SERVERS) AS PER THE PLAYBOOK INSTRUCTIONS.
       • THREEE ESSENTIAL COMPONENTS
         • PLAYBOOK
           • THE PLAYBOOK DEFINES A SERIES OF TASKS TO AUTOMATE, SUCH AS CONFIGURING A NETWORK DEVICE.
           • WRITTEN IN YAML
           • IT INCLUDES PLAYS, WHICH CONTAIN THE VARIABLES, ROLES AND AN ORDERED LISTS OF TASKS.
           • A PLAY CAN BE RUN REPEATEDLY.
         • MODULES
           • THESE ARE THE BUILDING BLOCKS OF TASKS INCLUDED IN THE PLAYBOOK
           • PROVIDING SPECIFIC FUNCTIONS LIKE EXECUTING COMMANDS OR CONFIGURING INTERFACES ON CISCO IOS DEVICES.
         • INVENTORY
           • THESE FILES LIST THE DEVICES YOU WANT TO MANAGE, INCLUDING THEIR IP ADDRESSES AND CONNECTION DETAILS.
       • INSTALLING ANSIBLE
         • TO INSTALL ANSIBLE, YOU NEED TO USE LINUX, MACOS, OR SET UP A LINUX ENVIRONMENT ON WINDOWS (VIA A VM OR WINDOWS SUBSYSTEM FOR LINUX).
         • THEN, UPDATE YOUR PACKAGE LISTS AND INSTALL THE TOOL. FOR EXACT STEPS, REFER TO THE OFFICIAL ANSIBLE DOCUMENTATION.
       • TO USE ANSIBLE TO CONFIGURE DEVICES
         • 1. WRITEN PLAYBOOK IN YAML SPECIFYING DESIRED CONFIGURATION
           • THE PLAYBOOK REFERENCES TARGET DEVICES CONTAINED IN AN INVENTORY FILE
         • 2 . YOU CAN RUN THE
           • ANSIBLE-PLAYBOOK COMMAND
         • 3 . ANSIBLE CONNECTS TO DEVICES LISTEDED IN AN INVENTORY FILE USING VIA SSH OR OTHER PROTOCOLS
           • THAN APPLIES THE CONFIGURATIONS AUTOMATICALLY
     • MAKING IT IDEAL FOR CONFIGURATION MANAGEMENT ON SYSTEMS WHERE SSH IS THE MAIN INTERFACE