Terraform: Autoscaling group diffs didn't match during apply (error applying plan)

[sortigoza]

Hello, I'm trying to raise an infrastructure with autoscaling groups and got the following error:

* module.compute.module.vault.aws_autoscaling_group.blue: aws_autoscaling_group.blue: 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.blue
    Mismatch reason: attribute mismatch: availability_zones.221770259
    Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"tag.#":*terraform.ResourceAttrDiff{Old:"", New:"1", 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}, "health_check_type":*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}, "default_cooldown":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "name":*terraform.ResourceAttrDiff{Old:"", New:"${aws_launch_configuration.blue.name}", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}, "launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"${aws_launch_configuration.blue.name}", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.4164140415.key":*terraform.ResourceAttrDiff{Old:"", New:"Name", NewComputed:false, 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.221770259":*terraform.ResourceAttrDiff{Old:"", New:"us-west-2b", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.2487133097":*terraform.ResourceAttrDiff{Old:"", New:"us-west-2a", 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}, "load_balancers.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "max_size":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.#":*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_elb_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", 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}, "arn":*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:"300", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "min_size":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.4164140415.value":*terraform.ResourceAttrDiff{Old:"", New:"saul-staging-vault.blue", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.4164140415.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:true, 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{"tag.4164140415.key":*terraform.ResourceAttrDiff{Old:"", New:"Name", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "min_size":*terraform.ResourceAttrDiff{Old:"", New:"2", 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}, "arn":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "load_balancers.#":*terraform.ResourceAttrDiff{Old:"", New:"1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "default_cooldown":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"saul-staging-vault.blue.003610837603e3d64b1bf42863", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "max_size":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "health_check_grace_period":*terraform.ResourceAttrDiff{Old:"", New:"300", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "health_check_type":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.4164140415.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", 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}, "force_delete":*terraform.ResourceAttrDiff{Old:"", New:"false", 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}, "vpc_zone_identifier.46162632":*terraform.ResourceAttrDiff{Old:"", New:"subnet-d1a870b7", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.#":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "name":*terraform.ResourceAttrDiff{Old:"", New:"saul-staging-vault.blue.003610837603e3d64b1bf42863", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}, "tag.#":*terraform.ResourceAttrDiff{Old:"", New:"1", 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}, "desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "load_balancers.2901668442":*terraform.ResourceAttrDiff{Old:"", New:"saul-staging-vault-blue", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.903133428":*terraform.ResourceAttrDiff{Old:"", New:"subnet-ef3ac5a7", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "wait_for_elb_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.4164140415.value":*terraform.ResourceAttrDiff{Old:"", New:"saul-staging-vault.blue", 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.


Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

Most of my .tf files are based on this repo: https://github.com/hashicorp/best-practices/tree/master/terraform/modules

I'm using a different app and removed the data modules.

Please let me know if you need more information or if there is any workaround.

Here is the specific file which declares the autoscaling group.

vault.tf.txt

[antenehmamo]

Hi ,

I also have the same error. Please find the specific file where autoscaling group is declared.

Thanks
vault.tf.txt

[alexlehm]

I got this error as well, using the files from this repo:

https://github.com/alex/ecs-terraform

[dirkjonker]

This seems to be the same issue as #15810

[nkhule]

Observed similar issue with Terraform version -v0.10.2
Following output is seen on terraform apply.
`* aws_autoscaling_group.autoscalinggrp: aws_autoscaling_group.autoscalinggrp: 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.autoscalinggrp
Mismatch reason: attribute mismatch: availability_zones.1305112097
Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"max_size":*terraform.ResourceAttrDiff{Old:"", New:"4", 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}, "metrics_granularity":*terraform.ResourceAttrDiff{Old:"", New:"1Minute", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "name":*terraform.ResourceAttrDiff{Old:"", New:"autoscalinggrp", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}, "min_size":*terraform.ResourceAttrDiff{Old:"", New:"2", 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}, "health_check_grace_period":*terraform.ResourceAttrDiff{Old:"", New:"600", 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}, "target_group_arns.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"${aws_launch_configuration.launchconfiguration.id}", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", 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}, "health_check_type":*terraform.ResourceAttrDiff{Old:"", New:"ELB", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.1305112097":*terraform.ResourceAttrDiff{Old:"", New:"us-east-1b", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.3569565595":*terraform.ResourceAttrDiff{Old:"", New:"us-east-1a", NewComputed:false, 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}, "default_cooldown":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "availability_zones.#":*terraform.ResourceAttrDiff{Old:"", New:"2", 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}}, 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{"desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.1437657009":*terraform.ResourceAttrDiff{Old:"", New:"subnet-e63ce182", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "name":*terraform.ResourceAttrDiff{Old:"", New:"autoscalinggrp", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}, "force_delete":*terraform.ResourceAttrDiff{Old:"", New:"false", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.#":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "default_cooldown":*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:"600", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "min_size":*terraform.ResourceAttrDiff{Old:"", New:"2", 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}, "max_size":*terraform.ResourceAttrDiff{Old:"", New:"4", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.763184531":*terraform.ResourceAttrDiff{Old:"", New:"subnet-136b4d3f", 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}, "load_balancers.2494368897":*terraform.ResourceAttrDiff{Old:"", New:"publicloadbalancer", 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}, "health_check_type":*terraform.ResourceAttrDiff{Old:"", New:"ELB", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "load_balancers.#":*terraform.ResourceAttrDiff{Old:"", New:"1", 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}, "launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"terraform-00f6bfc104d94e67123aeb0bd4", 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}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}`

Running it for second time worked.

[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 https://github.com/terraform-providers/terraform-provider-aws/issues/1630.

[jpSimkins]

I do not have availability_zones (I already use vpc_zone_identifier) and I have the same issue. Multiple applies do not work.

[plaplanche]

same issue here

[Miserlou]

Also just hit this.

Error: Error applying plan:

1 error(s) occurred:

* aws_autoscaling_group.clients: aws_autoscaling_group.clients: 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: 0.11.3
    Resource ID: aws_autoscaling_group.clients
    Mismatch reason: attribute mismatch: availability_zones.3569565595
    Diff One (usually from plan): *terraform.InstanceDiff{mu:sync.Mutex{state:0, sema:0x0}, Attributes:map[string]*terraform.ResourceAttrDiff{"force_delete":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.#":*terraform.ResourceAttrDiff{Old:"", New:"1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "min_size":*terraform.ResourceAttrDiff{Old:"", New:"1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "max_size":*terraform.ResourceAttrDiff{Old:"", New:"20", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"${aws_launch_configuration.auto_client_configuration.name}", 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}, "tag.250986881.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, 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}, "desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", 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}, "health_check_type":*terraform.ResourceAttrDiff{Old:"", New:"EC2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "default_cooldown":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, 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}, "name":*terraform.ResourceAttrDiff{Old:"", New:"asg-clients-rjones-dev-auto", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}, "availability_zones.3569565595":*terraform.ResourceAttrDiff{Old:"", New:"us-east-1a", 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}, "availability_zones.#":*terraform.ResourceAttrDiff{Old:"", New:"1", 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}, "tag.250986881.key":*terraform.ResourceAttrDiff{Old:"", New:"Name", 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_grace_period":*terraform.ResourceAttrDiff{Old:"", New:"300", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.250986881.value":*terraform.ResourceAttrDiff{Old:"", New:"Nomad Client Instance rjones-dev-auto", 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{"min_size":*terraform.ResourceAttrDiff{Old:"", New:"1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "max_size":*terraform.ResourceAttrDiff{Old:"", New:"20", 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}, "health_check_type":*terraform.ResourceAttrDiff{Old:"", New:"EC2", 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.250986881.propagate_at_launch":*terraform.ResourceAttrDiff{Old:"", New:"true", 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}, "force_delete":*terraform.ResourceAttrDiff{Old:"", New:"true", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.250986881.key":*terraform.ResourceAttrDiff{Old:"", New:"Name", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.#":*terraform.ResourceAttrDiff{Old:"", New:"1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "vpc_zone_identifier.2780583332":*terraform.ResourceAttrDiff{Old:"", New:"subnet-cb665ae4", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "desired_capacity":*terraform.ResourceAttrDiff{Old:"", New:"2", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "default_cooldown":*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:"300", 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}, "target_group_arns.#":*terraform.ResourceAttrDiff{Old:"", New:"", NewComputed:true, 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}, "vpc_zone_identifier.#":*terraform.ResourceAttrDiff{Old:"", New:"1", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "launch_configuration":*terraform.ResourceAttrDiff{Old:"", New:"auto-client-20180322181347037000000003", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "tag.250986881.value":*terraform.ResourceAttrDiff{Old:"", New:"Nomad Client Instance rjones-dev-auto", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:false, Sensitive:false, Type:0x0}, "name":*terraform.ResourceAttrDiff{Old:"", New:"asg-clients-rjones-dev-auto", NewComputed:false, NewRemoved:false, NewExtra:interface {}(nil), RequiresNew:true, Sensitive:false, Type:0x0}}, Destroy:false, DestroyDeposed:false, DestroyTainted:false, Meta:map[string]interface {}(nil)}

[thejazzid]

Hi There. if this helps, removing this option from ASG or replacing with empty list
suspended_processes = "${var.suspended_processes}" helped me.

[pcanham]

Seeing the same issue with terraform v0.11.7 workaround was to comment out "availability_zones" as recommended by andrewschleifer

Code I was using

resource "aws_autoscaling_group" "autoscaling_group" {
  name_prefix = "Bastion"

  launch_configuration = "${aws_launch_configuration.launch_configuration.name}"

  availability_zones  = ["${var.availability_zones}"]
  vpc_zone_identifier = ["${var.public_cidr_blocks}"]

  min_size             = "1"
  max_size             = "1"
  desired_capacity     = "1"
  termination_policies = ["${var.termination_policies}"]

  health_check_type         = "EC2"
  health_check_grace_period = "300"
  wait_for_capacity_timeout = "10m"

  tags = ["${list(
        map( "key", "ENVIRONMENT", "value", "${upper(var.environment_tag)}", "propagate_at_launch", true),
        map( "key", "OWNER", "value", "${upper(var.owner_tag)}", "propagate_at_launch", true),
        map( "key", "PROJECT", "value", "${upper(var.project_tag)}", "propagate_at_launch", true),
        map( "key", "BUDGET", "value", "${upper(var.budget_tag)}", "propagate_at_launch", true),
        map( "key", "BUSINESS", "value", "${upper(var.business_tag)}", "propagate_at_launch", true),
        map( "key", "AUTOMATION", "value", "${upper(var.automation_tag)}", "propagate_at_launch", true)
      )}"]
  }

[avengers009]

As we are creating VPC on fly we need to comment out availability zone and it works.

The AZs are defined by the AZ of the subnets and Terraform can throw “diff’s don’t match” errors when both are defined

Note: either one sould be defined not both.
vpc_zone_identifier = ["${var.subnets_id_vpc}"]
availability_zones = ["${split(",", var.availability_zones)}"]

resource "aws_autoscaling_group" "web-asg" {

   availability_zones   = ["${split(",", var.availability_zones)}"]
   name                 = "${var.Environment}-web_asg"
  .........}

please refer: https://www.terraform.io/docs/providers/aws/r/autoscaling_group.html#availability_zones

[mildwonkey]

Hello!
This is a provider issue which is covered in https://github.com/terraform-providers/terraform-provider-aws/issues/4801

I am going to close this ticket - please feel free to continue the conversation in the terraform-provider-aws issue.

Thank you! (and thanks @avengers009 for pointing out the duplicate)

[hashibot[bot]]

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