URL Automation Script

Purpose

Shell script developed to automate the creation of external URLs on an apache reverse proxy server.

Inputs

The script requires a number of variables defined on the pipeline to create the external URL rule

Variable Name	Value
DEMO_URL_ENVCODE	a double digit code which represents a deployment environment
DEMO_URL_APPLICATION	Must be either first_app or second_app or third_app
DEMO_URL_INTERNALHOSTNAME	Either the shortname or FQDN of the instance. Do NOT prefix with http or https and do not add a port
DEMO_URL_INTERNALPORT	portnumber only. NO letters or slash

Method

The script performs the following actions based on the variables provided

Functions

• validate_app function
  • This function performs a number of checks to ensure the input variables are valid and converts all to lowecase
• build_record function
  • This function is used to work out the next available external host for the environment and application provided.
  • This is performed by checking against AWS Route53 for existing records. If they exists the code will increment the suffix number until it finds one which does not exist
  • For example if the env is Z1 and the app is first_app the process will check for z1first_app01, if it exists it will try z1first_app02 and continue until an unused value is calculated
• check_conf_d
  • This function checks to ensure there are no existing apache configuration files for this rule
• update_route53
  • A json file is generated which is used by the AWS CLI to create the Route53 A Record for the external URL. Prior to creating the rule the existing Route53 A Records are backed up to a json file.
• build_proxy_rule
  • Used to build the re-write rule for this external url. Will be stored as a drop-in file on the Apache server
• restart_service
  • Restarts the httpd process

Known issues

None

Planned enhancements

None presently

Author

Dave Hart link to blog!