Instance parameters

instance_parameters.yaml

# 1. Current Nail's PR implementation
# + single union type with uniform way of passing parameters
# - breaking backward compatibility with current "parameters" field
# - extra "inline" nesting level for inline parameters (concern expressed by Doug)
spec:
  serviceClassName: user-provided-service
  planName: default
  parameters:
    inline:
      username: root
      password: letmein
    secretRef:
      name: mySecret
    secretKeyRef:
      name: myOtherSecret
      key: key1
      
# 2. Doug's proposal
# + eliminates extra "inline" nesting level
# + preserves backward compatibility with master implementation
# - "k8s_" prefix looks ugly and hacky
spec:
  serviceClassName: user-provided-service
  planName: default
  parameters:
    username: root
    password: letmein
    k8s_secretRef:
      name: mySecret
    k8s_secretKeyRef:
      name: myOtherSecret
      key: key1
      
# 3. Nail's alternative proposal
# + eliminates extra "inline" nesting level
# + preserves backward compatibility with master implementation
# + similar to "env.value" and "env.valueFrom" approach in Kubernetes
# - 2 fields at the top level, outstanding separate case for inline parameters
spec:
  serviceClassName: user-provided-service
  planName: default
  parameters:
    username: root
    password: letmein
  parametersFrom:
    secretRef:
      name: mySecret
    secretKeyRef:
      name: myOtherSecret
      key: key1