Dependencies and Credentials

[tamirkamara]

Hi,

In a situation where a parent bundle depends on a child bundle and both have credentials (same ones), how should those be passed along?
There's a parameters object under a dependency but nothing is mentioned about credentials...

[carolynvs]

All credentials supplied to the parent bundle are passed along to any dependencies in the current implementation of dependencies. This means that if you are using a dependency that needs a credential, you must redeclare that credential on the parent bundle too.

This is something that is being completely overhauled in the proposal for changing dependencies in Porter but is a long way off from being implemented.

[tamirkamara]

Hi @carolynvs,
I might had mis-diagnose the issue I was seeing - trying to do something like this:

dependencies:
  - name: child
    reference: myacr/child:v0.1.0
    parameters:
      tre_id: "{{ bundle.parameters.tre_id }}"
      id: "{{ bundle.parameters.id }}"
      azure_location: "{{ bundle.parameters.azure_location }}"
      tfstate_resource_group_name: "{{ bundle.parameters.tfstate_resource_group_name }}"
      tfstate_storage_account_name: "{{ bundle.parameters.tfstate_storage_account_name }}"
      tfstate_container_name: "{{ bundle.parameters.tfstate_container_name }}"

Essentially chaining the parent's parameters and passing them to the child call.
Isn't it possible in v0?

[carolynvs]

Right now you can only pass in hard-coded values to the dependencies parameters. Wiring up the parent bundle's parameters and credentials to a dependency is a new feature that we are planning for dependencies v2 in PEP 003.

[tamirkamara]

It's unfortunate... I think this is a must for realistic reuse.
Do you have ideas on how can this be done in the meantime? Maybe porter in the parent bundle? Trying to avoid just duplicating the child bundle files.

[carolynvs]

Agreed that it's a problem which is why we are completely redoing dependencies from the ground up...

For now if you want something a piece of data to pass through from the parent to a dependency, define a credential in both bundles and pass it that way, and don't use a parameter. Porter passes ALL credentials given to the parent bundle to the child dependencies, so as long as you line up the names of the creds, it should work.