Hi, I'm pretty new with pulumi trying to figure out few things, especially with reading outputs of one resource and re-using them in another. I have deployed rancher2.Cluster resource and trying to read its outputs and passing it to rancher2.AppV2

rancher_ci_cluster = rancher2.Cluster()

chart = rancher2.AppV2("cluster-autoscaler",
    cluster_id=rancher_ci_cluster.id,
    namespace="kube-system",
    repo_name=catalog.name.apply(lambda name: name),
    chart_name="cluster-autoscaler",
    chart_version="9.10.7",
    values=f"""
awsRegion: {config.require("rancherAwsCiRegion")}
autoDiscovery:
  clusterName: {rancher_ci_cluster.name.apply(lambda name: name)}
extraArgs:
  balance-similar-node-groups: true
priorityClassName: system-cluster-critical
""",
    opts=ResourceOptions(depends_on=catalog)
    )

so in the above snippet i could read the rancher_ci_cluster.id without any apply() or all() . but for looking up name even though i used

rancher_ci_cluster.name.apply(lambda name: name)

i still see it as an object instead of raw data

<pulumi.output.Output object at 0x103a73e20>

. so can anyone help me understand what is that im missing here and how the behavior works?

Not an answer to your question but just FYI

something.property.apply(lambda name: name)

is equivalent to

something.property

. The lambda function is just the identity function so no transformation is performed.

yeah just want a string but in an yaml format and i'm passing the value dynamically from previous resource

ohh right. does Pulumi Python have the

interpolate

function?

oh so need to use

all()

and

apply()

together?

yeah i think soemthing like this will work. might be an even better way to format it but i forget if python supports array param deconstruction

values=Output.all(config.require("rancherAwsCiRegion"), rancher_ci_cluster.name).apply(lambda s: f"""
awsRegion: {s[0]}
autoDiscovery:
  clusterName: {s[1]}
extraArgs:
  balance-similar-node-groups: true
priorityClassName: system-cluster-critical
""",

let me try it out.

might have to make that function a named function if python doesn't allow it for being multi-line

it might fail having

config

(as this is

pulumi.Config

) in

Output

as its not a resource

Output.all

just takes Outputs. it doesn't need to be from a cloud resource

perfect , thanks for help. appreciate it 👏

A Pulumi

Output<string>

is an object. It is not the same as a

string

. So you can't use it in normal string interpolation. The reason why you got an object reference earlier is because you used it python's string interpolation, and the string value of an object is that string you got with the memory address. What

apply

does is it allows you to access the value wrapped by

Output

. Within the callback function, you can treat an

Output<string>

as a normal string. This allows you to use

s[0]

and

s[1]

in the code block above as regular strings.

catalog.name.apply(lambda name: name)

is the same as

catalog.name

because the callback function you passed in is the identity function, not for any other reason.

understood, thanks for sharing out in detail. this helps.