Hi there, if i import an existing resource in azure ( for example resource group) with the importId parameter inside the CustomResourceOptions, why does pulumi rename my resource ?

var resourceGroup = new ResourceGroup("resourceBla", new ResourceGroupArgs,
new CustomResourceOptions
{
 ImportId = "/subscriptions/4711/resourceGroups/resourceBla"
}); 

azure:core:ResourceGroup  resourceBla                  import     [diff: ~name]; 1 warning

I don't think that using the ImportId causes it to actually import. This command gets the resource:

const resourceGroup = azure.core.ResourceGroup.get(resourceGroupName, resouceGroupId);

and this command with the

import

directive will import it and put it under stack management.

let server = new aws.ec2.Instance("web-server", {
    ami: "ami-6869aa05",
    instanceType: "t2.micro",
    securityGroups: [ group.name ],
}, { import: "i-06a1073de86f4adef" });

https://www.pulumi.com/docs/intro/concepts/programming-model/#import

Ah sorry i missed this inside the documentation

Because of auto-naming, it is common to run into this when importing a resource’s name property. Unless you explicitly specify a name, Pulumi will auto-generate one, which is guaranteed not to match, because it will have a random hex suffix. To fix this problem, explicitly specify the resource’s name as described here. Notice that has been done in the above example for the EC2 security group, by passing 

"web-sg-62a569b"

 as its name property in its arguments.