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Every once in a while when I run pulumi up, the preview shows that it will replace a lot of resources due to a provider change. Sometimes this happens when I upgrade the AWS provider, and in the past this tended to happen more when the project has evolved a lot between updates. In some of these cases I can avoid replacement by breaking down the changes to the project into smaller units and applying them in order instead of in one large update. But today it seems to be happening even though the provider version is the same. There are some resources with additional changes, but many resources being replaced only have a provider diff, but it's the same version. Attaching an excerpt from the preview details here. Why is this? And how can I avoid it?

++aws:s3/bucket:Bucket: (create-replacement)
        [id=xxxx-dev]
        [urn=urn:pulumi:dev::datalake-iac::aws:s3/bucket:Bucket::xxxx]
        [provider: urn:pulumi:dev::datalake-iac::pulumi:providers:aws::default_6_48_0::1b1bc0e4-8f0c-4ca7-98eb-e9f2d2c280ad => urn:pulumi:dev::datalake-iac::pulumi:providers:aws::default_6_48_0::output<string>]
        acl         : "private"
        bucket      : "xxxx-dev"
        forceDestroy: false
        tags        : {
            abadai:component     : "Artifacts"
            abadai:env           : "dev"
            abadai:ops:owner     : "Engineering"
            abadai:pulumi:project: "datalake-iac"
            abadai:pulumi:stack  : "dev"
            abadai:service       : "Datalake"
        }
        tagsAll     : {
            abadai:component     : "Artifacts"
            abadai:env           : "dev"
            abadai:ops:owner     : "Engineering"
            abadai:pulumi:project: "datalake-iac"
            abadai:pulumi:stack  : "dev"
            abadai:service       : "Datalake"
        }

    +-aws:s3/bucket:Bucket: (replace)
        [id=xxxx-dev]
        [urn=urn:pulumi:dev::datalake-iac::aws:s3/bucket:Bucket::xxxx]
        [provider: urn:pulumi:dev::datalake-iac::pulumi:providers:aws::default_6_48_0::1b1bc0e4-8f0c-4ca7-98eb-e9f2d2c280ad => urn:pulumi:dev::datalake-iac::pulumi:providers:aws::default_6_48_0::output<string>]
      - accelerationStatus               : ""
      - arn                              : "arn:aws:s3:::xxxx-dev"
      - bucketDomainName                 : "xxxx-dev.s3.amazonaws.com"
      - bucketRegionalDomainName         : "xxxx-dev.s3.amazonaws.com"
      - corsRules                        : []
      - grants                           : []
      - hostedZoneId                     : "REDACTED"
      - id                               : "xxxx-dev"
      - lifecycleRules                   : []
      - loggings                         : []
      - region                           : "us-east-1"
      - requestPayer                     : "BucketOwner"
      - serverSideEncryptionConfiguration: {
          - rule: {
              - applyServerSideEncryptionByDefault: {
                  - kmsMasterKeyId: ""
                  - sseAlgorithm  : "AES256"
                }
              - bucketKeyEnabled                  : false
            }
        }
      - tagsAll                          : [secret]
      + tagsAll                          : {
          + abadai:component     : "Artifacts"
          + abadai:env           : "dev"
          + abadai:ops:owner     : "Engineering"
          + abadai:pulumi:project: "datalake-iac"
          + abadai:pulumi:stack  : "dev"
          + abadai:service       : "Datalake"
        }
      - versioning                       : {
          - enabled  : true
          - mfaDelete: false
        }

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Hi all, I'm using S3 as my backend and I specify the s3 path in

Pulumi.yaml

I want the backend s3 bucket to be different for each environment. How do I do it? Initially I wanted to use the same bucket name in each environment but then remembered that bucket names are global.

name: pulumi_backend
stackConfigDir: ./config
runtime:
  name: python
description: S3 backend for self-hosted Pulumi
backend:
  url: <s3://fd-pulumi-backend>

basically this needs to be different for each stack (

qa

,

prod

, etc.):

backend:
  url: <s3://fd-pulumi-backend>

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