Random Values in Blueprints

In some cases, you might need to generate random strings in your Velocity Blueprint.
A common use case for using random strings is generating passwords, or secured tokens when provisioning new infrastructure resources. 
Velocity allows you to use the {velocity.v1.generate:random}Velocity Template which will be resolved into a string upon provisioning. The syntax supports two options: 
1.A simple random string that translates into an 8 character string:
{velocity.v1.generate:random} 

2.A custom regular expression:
{velocity.v1.generate:random([a-zA-Z0-9]{8})}
The random generator uses a combination of environment name, environment creation date, resource identifier, and path in the manifest as a seed of the random generator
Random Values Example:
apiVersion: apps/v1
kind: Deployment
metadata:
 name: mysql
 annotations:
  velocity.tech.v1/id: mysql
spec:
 containers:
  - name: mysql
   env:       
    - name: DATABASE_NAME
     value: 'orders'
    - name: DATABASE_PASSWORD
     value: '{velocity.v1.generate:random}'

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Last modified 2mo ago