s3_bucket_object diffs didn't match, when ignore_changes lifecycle rule is in place

[hanninen]

The s3_bucket_object resource's diffs didn't match, when I added the ignore_changes lifecycle rule to the resource. The s3 object is defined in a module that is used in the terraform root module.

My working resource configuration

resource "aws_s3_bucket_object" "logstash-config" {
    bucket = "${aws_s3_bucket.ecs.id}"
    key = "logstash.config"
    source = "${path.module}/files/aws_s3_bucket_object.logstash.config"
}

terraform apply fails with this resource configuration

resource "aws_s3_bucket_object" "logstash-config" {
    bucket = "${aws_s3_bucket.ecs.id}"
    key = "logstash.config"
    source = "${path.module}/files/aws_s3_bucket_object.logstash.config"
    lifecycle { ignore_changes = ["source"] }
}

We are using a custom wrapper for terraform, which initializes the terraform environment in a clean temporary directory, thus causing the source value to change on each run.

Here is the error output from terraform apply:

* aws_s3_bucket_object.logstash-config: diffs didn't match during apply. This is a bug with Terraform and should be reported as a GitHub Issue.

Please include the following information in your report:

    Terraform Version: 0.6.12
    Resource ID: aws_s3_bucket_object.logstash-config
    Mismatch reason: diff RequiresNew; old: false, new: true
    Diff One (usually from plan): *terraform.InstanceDiff{Attributes:map[string]*terraform.ResourceAttrDiff{"key":*terraform.ResourceAttrDiff{Old:"logstash.config", New:"logstash.config", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Type:0x0}, "etag":*terraform.ResourceAttrDiff{Old:"\"8bf09728676947c03e069eaddc9ca391\"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Type:0x0}, "bucket":*terraform.ResourceAttrDiff{Old:"infra-ecs-test", New:"infra-ecs-test", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Type:0x0}, "content_type":*terraform.ResourceAttrDiff{Old:"binary/octet-stream", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Type:0x0}}, Destroy:false, DestroyTainted:false}
    Diff Two (usually from apply): *terraform.InstanceDiff{Attributes:map[string]*terraform.ResourceAttrDiff{"etag":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Type:0x0}, "bucket":*terraform.ResourceAttrDiff{Old:"", New:"infra-ecs-test", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Type:0x0}, "content_type":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Type:0x0}, "key":*terraform.ResourceAttrDiff{Old:"", New:"logstash.config", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Type:0x0}}, Destroy:false, DestroyTainted:false}

Also include as much context as you can about your config, state, and the steps you performed to trigger this error.

[phinze]

Hi @hanninen - thanks for this report, I'm working on fixing up all known issues with ignore_changes today. Consolidating this issue over into #5627 👍

[ghost]

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