Hi guys, I’m trying to create

VPC

and

Subnet Network

with Pulumi in python and during the process to understand the relationships management in Pulumi, I’ve created the following 3 files (attaching in the comments):

network.py

- which contains the python functions I want to use in multiple projects

Pulumi.stg.yaml

- contains the configurations

__main__.py

- main code with calls to the functions When I ran this code I saw there is no relationship management, I have tried to use

ResourceOptions(parent\child)

I’ve also tried to use the

dependsOn:

but I didn’t success to use it, I think in both options the resource should be exists before, and I want to know how to do it right. I’d be glad to get some examples because I didn’t find on the internet. Thanks a lot

@agreeable-angle-1483 I would start by wiring up dependencies using the Python objects, not strings / names. Concretely in this case: looks like you are declaring the

compute.Subnetwork(...)

with

network

set to the string value of the

vpc_name

variable, which is

"lala"

. Instead you would set

network

equal to the object that is returned from

compute.Network(...)

. This should establish the desired relationship.

Thanks @colossal-ram-89482 I’ve got to this example which seems helpful https://github.com/pulumi/pulumi-awsx/blob/master/python/pulumi_aws_infra/network.py I’m looking for an example for how to use Outputs as dependency between resources in python

Note that there are two notions of “output”. 1) Resource outputs of type

pulumi.output.Output

which can be used as inputs to other resources. And then 2) stack outputs which are created by

pulumi.export()

.

@agreeable-angle-1483 note that the awsx library is not yet available in Python (there is a partial port of part of the library in the repo there, but it is not complete and not yet documented). That is the reason there are almost no examples in that particular repo. “Examples” in most repros are also actually tests (we should rename to avoid confusion). There are 24 Python examples across a variety of clouds in the main Pulumi examples repo: https://github.com/pulumi/examples.

Is there an example of the

pulumi.output

and

pulumi.input

? I.e 2 resources with a dependency I didn't find

@agreeable-angle-1483 Sure. Looking at https://github.com/pulumi/examples/blob/master/aws-py-s3-folder/__main__.py

web_bucket

is of type

pulumi_aws.s3.Bucket

web_bucket.id

is of type

pulumi.output.Output[str]

then in the

for

loop:

obj

is of type

pulumi_aws.s3.BucketObject

obj.bucket

is of type

Input[str]

obj.bucket

is set to

web_bucket.id

// assigning

Input

to

Output

Thus all of the `obj`s (bucket objects) are dependent on the creation of

web_bucket

(the bucket itself)

Thanks @colossal-ram-89482 it makes more sense

Excellent!