Error with aws_autoscaling_group after 0.10.0 upgrade

[fillup]

After upgrading to 0.10.0 I am getting an error related to aws_autoscaling_group. Reverting to 0.9.11 is successful again.

Terraform Version

0.10.0

Affected Resource(s)

Please list the resources as a list, for example:

• aws_autoscaling_group

Terraform Configuration Files

Using custom module: https://github.com/silinternational/terraform-modules/tree/master/aws/asg

Debug Output

Terraform existed with an error and some details to include in this report, here is a link to the gist:
https://gist.github.com/fillup/8c6930ecf00d3985c7f74aeaabaf5875

Expected Behavior

When running apply my infrastructure should have been created

Actual Behavior

Terraform failed due to diff issues between plan and apply

[fillup]

I just wanted to comment that I still have this error with Terraform 0.10.2

Error applying plan:

1 error(s) occurred:

* module.cluster.module.asg.aws_autoscaling_group.asg: aws_autoscaling_group.asg: 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: 0.10.2
    Resource ID: aws_autoscaling_group.asg
    Mismatch reason: attribute mismatch: availability_zones.2762590996
    Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"${aws_launch_configuration.as_conf.id}", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "force_delete":*terraform.ResourceAttrDiff{Old:"", New:"false", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "max_size":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.1787451045.value":*terraform.ResourceAttrDiff{Old:"", New:"idp-appsdev", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "load_balancers.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.1787451045.key":*terraform.ResourceAttrDiff{Old:"", New:"app_name", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.679526560.value":*terraform.ResourceAttrDiff{Old:"", New:"staging", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "name":*terraform.ResourceAttrDiff{Old:"", New:"asg-${var.app_name}-${var.app_env}-${aws_launch_configuration.as_conf.name}", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}, "tag.679526560.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "arn":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.986537655":*terraform.ResourceAttrDiff{Old:"", New:"us-east-1c", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.#":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "health_check_grace_period":*terraform.ResourceAttrDiff{Old:"", New:"120", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.2762590996":*terraform.ResourceAttrDiff{Old:"", New:"us-east-1d", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "min_size":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.679526560.key":*terraform.ResourceAttrDiff{Old:"", New:"app_env", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.#":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "target_group_arns.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "wait_for_capacity_timeout":*terraform.ResourceAttrDiff{Old:"", New:"10m", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "default_cooldown":*terraform.ResourceAttrDiff{Old:"", New:"30", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "metrics_granularity":*terraform.ResourceAttrDiff{Old:"", New:"1Minute", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "health_check_type":*terraform.ResourceAttrDiff{Old:"", New:"EC2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "protect_from_scale_in":*terraform.ResourceAttrDiff{Old:"", New:"false", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.1787451045.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.3551460226":*terraform.ResourceAttrDiff{Old:"", New:"us-east-1e", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}
    Diff Two (usually from apply): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"terraform-00c0d940b5fe34d6cfe1fb8e29", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.#":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.#":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.679526560.key":*terraform.ResourceAttrDiff{Old:"", New:"app_env", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.1787451045.value":*terraform.ResourceAttrDiff{Old:"", New:"idp-appsdev", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.1787451045.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "load_balancers.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.2126000758":*terraform.ResourceAttrDiff{Old:"", New:"subnet-524ca76d", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "arn":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "protect_from_scale_in":*terraform.ResourceAttrDiff{Old:"", New:"false", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "target_group_arns.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "health_check_grace_period":*terraform.ResourceAttrDiff{Old:"", New:"120", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.2300996516":*terraform.ResourceAttrDiff{Old:"", New:"subnet-3517dd51", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "wait_for_capacity_timeout":*terraform.ResourceAttrDiff{Old:"", New:"10m", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "metrics_granularity":*terraform.ResourceAttrDiff{Old:"", New:"1Minute", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "health_check_type":*terraform.ResourceAttrDiff{Old:"", New:"EC2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.484356721":*terraform.ResourceAttrDiff{Old:"", New:"subnet-6886d332", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.679526560.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "default_cooldown":*terraform.ResourceAttrDiff{Old:"", New:"30", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "min_size":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "force_delete":*terraform.ResourceAttrDiff{Old:"", New:"false", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.679526560.value":*terraform.ResourceAttrDiff{Old:"", New:"staging", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "max_size":*terraform.ResourceAttrDiff{Old:"", New:"3", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "name":*terraform.ResourceAttrDiff{Old:"", New:"asg-idp-appsdev-staging-terraform-00c0d940b5fe34d6cfe1fb8e29", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}, "tag.1787451045.key":*terraform.ResourceAttrDiff{Old:"", New:"app_name", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}

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

[andrewschleifer]

Remove the availability_zones from the aws_autoscaling_group definition as a work-around (since they can be derived from the vpc_zone_identifier). I've got some notes about the cause in #1630.

[fillup]

Thank you, I can confirm removing that fixes the problem and my instances are still spread across the zones as desired, so that works for me.

[bflad]

This issue was automatically closed by the documentation update in #3897. The configuration fix for diffs didn't match during apply and Mismatch reason: attribute mismatch: availability_zones.XXXXXX is to remove availability_zones configuration if vpc_zone_identifier is also specified. If you must specify availability_zones due to being used in a module that works with both EC2-Classic and VPC, availability_zones can be set to [] (an empty list).

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!