Fix panic in `azurerm_virtual_machine_scale_set` resource with `additional_unattend_config` block #266

dominik-lekse · 2017-08-23T19:51:36Z

This pull request fixes a nil pointer dereference panic in the azurerm_virtual_machine_scale_set resource. The panic occurs when at least one additional_unattend_config block is defined in the os_profile_windows_config block. A similar issue has been fixed for the azurerm_virtual_machine resource in terraform #7453.

Affected Resource(s)

azurerm_virtual_machine_scale_set

Panic Output

panic: runtime error: invalid memory address or nil pointer dereference
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x1a2f473]
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm:
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: goroutine 1163 [running]:
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: github.com/terraform-providers/terraform-provider-azurerm/azurerm.flattenAzureRmVirtualMachineScaleSetOsProfileWindowsConfig(0xc4203310b0, 0x1c6f5a8, 0x12, 0x1ad6bc0)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/Users/lekse/Projects/terraform/src/github.com/terraform-providers/terraform-provider-azurerm/azurerm/resource_arm_virtual_machine_scale_set.go:779 +0x3f3
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: github.com/terraform-providers/terraform-provider-azurerm/azurerm.resourceArmVirtualMachineScaleSetRead(0xc420183ab0, 0x1b983e0, 0xc4203e2500, 0xc420509fc0, 0x0)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/Users/lekse/Projects/terraform/src/github.com/terraform-providers/terraform-provider-azurerm/azurerm/resource_arm_virtual_machine_scale_set.go:656 +0x1c92
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: github.com/terraform-providers/terraform-provider-azurerm/azurerm.resourceArmVirtualMachineScaleSetCreate(0xc420183ab0, 0x1b983e0, 0xc4203e2500, 0x24, 0x2315c00)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/Users/lekse/Projects/terraform/src/github.com/terraform-providers/terraform-provider-azurerm/azurerm/resource_arm_virtual_machine_scale_set.go:603 +0x98b
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema.(*Resource).Apply(0xc4205d3440, 0xc420394640, 0xc42051afe0, 0x1b983e0, 0xc4203e2500, 0x1, 0x28, 0xc42035bf20)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/Users/lekse/Projects/terraform/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema/resource.go:193 +0x449
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema.(*Provider).Apply(0xc420254f50, 0xc4203945f0, 0xc420394640, 0xc42051afe0, 0x261e4b0, 0x0, 0xc420129c80)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/Users/lekse/Projects/terraform/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema/provider.go:259 +0x9b
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/plugin.(*ResourceProviderServer).Apply(0xc4205091a0, 0xc42051af80, 0xc420451e80, 0x0, 0x0)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/Users/lekse/Projects/terraform/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/plugin/resource_provider.go:488 +0x57
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: reflect.Value.call(0xc4202d03c0, 0xc420121588, 0x13, 0x1c5febb, 0x4, 0xc420683f20, 0x3, 0x3, 0x0, 0xc4200396f8, ...)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/usr/local/Cellar/go/1.8.3/libexec/src/reflect/value.go:434 +0x91f
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: reflect.Value.Call(0xc4202d03c0, 0xc420121588, 0x13, 0xc420039720, 0x3, 0x3, 0xc4200397c0, 0x13f5fbe, 0xc420884720)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/usr/local/Cellar/go/1.8.3/libexec/src/reflect/value.go:302 +0xa4
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: net/rpc.(*service).call(0xc4209ff980, 0xc4209ff940, 0xc4206ac540, 0xc420122880, 0xc4204aa460, 0x1abf900, 0xc42051af80, 0x16, 0x1abf940, 0xc420451e80, ...)
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/usr/local/Cellar/go/1.8.3/libexec/src/net/rpc/server.go:387 +0x144
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: created by net/rpc.(*Server).ServeCodec
2017-08-23T21:15:20.953+0200 [DEBUG] plugin.terraform-provider-azurerm: 	/usr/local/Cellar/go/1.8.3/libexec/src/net/rpc/server.go:481 +0x404
2017/08/23 21:15:20 [TRACE] root: eval: *terraform.EvalWriteState
2017/08/23 21:15:20 [TRACE] root: eval: *terraform.EvalApplyProvisioners
2017/08/23 21:15:20 [TRACE] root: eval: *terraform.EvalIf
2017/08/23 21:15:20 [TRACE] root: eval: *terraform.EvalWriteState
2017/08/23 21:15:20 [TRACE] root: eval: *terraform.EvalWriteDiff
2017/08/23 21:15:20 [TRACE] root: eval: *terraform.EvalApplyPost
2017/08/23 21:15:20 [ERROR] root: eval: *terraform.EvalApplyPost, err: 1 error(s) occurred:

* azurerm_virtual_machine_scale_set.staging_app: unexpected EOF
2017/08/23 21:15:20 [ERROR] root: eval: *terraform.EvalSequence, err: 1 error(s) occurred:

* azurerm_virtual_machine_scale_set.staging_app: unexpected EOF
2017/08/23 21:15:20 [TRACE] [walkApply] Exiting eval tree: azurerm_virtual_machine_scale_set.staging_app
2017/08/23 21:15:20 [TRACE] dag/walk: upstream errored, not walking "provider.azurerm (close)"
2017/08/23 21:15:20 [TRACE] dag/walk: upstream errored, not walking "meta.count-boundary (count boundary fixup)"
2017/08/23 21:15:20 [TRACE] dag/walk: upstream errored, not walking "root"
2017-08-23T21:15:20.958+0200 [DEBUG] plugin: plugin process exited: path=/Users/lekse/Projects/terraform/bin/terraform-provider-azurerm
2017/08/23 21:15:20 [TRACE] Preserving existing state lineage "9cd3087b-7fee-4744-8b6a-4a7ccfbbfca2"
2017/08/23 21:15:20 [TRACE] Preserving existing state lineage "9cd3087b-7fee-4744-8b6a-4a7ccfbbfca2"
2017/08/23 21:15:20 [TRACE] Preserving existing state lineage "9cd3087b-7fee-4744-8b6a-4a7ccfbbfca2"
2017/08/23 21:15:20 [DEBUG] plugin: waiting for all plugin processes to complete...
2017-08-23T21:15:20.989+0200 [WARN ] plugin: error closing client during Kill: err="connection is shut down"

Expected Behavior

New virtual machine scale set resource is created in Azure
New virtual machine scale set is stored in Terraform state
terraform apply finishes successfully

Actual Behavior

New virtual machine scale set resource is created in Azure
New virtual machine scale set is not stored in Terraform state
terraform apply exits with panic

Steps to Reproduce

Define a azurerm_virtual_machine_scale_set resource which contains at least one additional_unattend_config block in the os_profile_windows_config block
terraform apply

Acceptance tests

=== RUN   TestAccAzureRMVirtualMachineScaleSet_basicWindows_managedDisk
--- PASS: TestAccAzureRMVirtualMachineScaleSet_basicWindows_managedDisk (574.01s)
PASS
ok  	github.com/terraform-providers/terraform-provider-azurerm/azurerm	574.030s

References

terraform #7453 (similar issue has been fixed for the azurerm_virtual_machine resource)
Fixes azurerm_virtual_machine_scale_set additional_unattended_config panics terraform #220
Fixes azurerm_virtual_machine_scale_set os_profile_windows_config winrm settings gets terraform into unworkable state #219

…t resource when azure-sdk-for-go client returns nil in AdditionalUnattendContent.Content

dominik-lekse · 2017-08-23T19:56:00Z

After scanning the open issues, I add that this fixes #220.

tombuildsstuff · 2017-08-24T09:41:21Z

Hey @dominik-lekse

Thanks for this PR - this LGTM! Taking a look at the VMSS tests I can't see any test covering this right now - as such would it be possible to add one a test for this as part of this PR, so that we can test this automatically going forward? :)

Thanks!

dominik-lekse · 2017-08-24T10:45:52Z

@tombuildsstuff You are right, looks like there is no test case covering a scale set consisting of Windows machines. I will add one which then also includes the os_profile_windows_config block.

…`additional_unattend_config` in `os_profile_windows_config` as already fixed for `azurerm_virtual_machine` in 443dd11

…ource `azurerm_virtual_machine_scale_set` when using `os_profile_linux_config`

…ows_managedDisk`

dominik-lekse · 2017-08-24T21:32:30Z

I have added the test TestAccAzureRMVirtualMachineScaleSet_basicWindows_managedDisk to this pull request. When running the test, I was able to reproduce #219. The commit a9b29f4 changes the type of additional_unattend_config in the schema from TypeSet to TypeList as it has been done for azurerm_virtual_machine in 443dd11. Since there was no schema migration required in 443dd11, I assume this is also the case for azurerm_virtual_machine_scale_set. Would be great if you could check this assumption @tombuildsstuff.

dominik-lekse · 2017-09-14T15:57:51Z

Hi @tombuildsstuff, just wanted to ping if you had a chance to take a look at this bug fix?

tombuildsstuff · 2017-09-18T13:52:56Z

👋 @dominik-lekse sorry for the delay - I'm going to take a look into this today :)

tombuildsstuff · 2017-09-18T14:27:42Z

Hey @dominik-lekse

Thanks for this PR - I've taken a look through and this LGTM :)

Tests pass:

Thanks!

ghost · 2020-04-01T15:17:49Z

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. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!

Fix nil pointer dereference panic in azurerm_virtual_machine_scale_se…

f1e41cf

…t resource when azure-sdk-for-go client returns nil in AdditionalUnattendContent.Content

tombuildsstuff added bug enhancement labels Aug 24, 2017

dominik-lekse added 3 commits August 24, 2017 23:18

Fix error in resource azurerm_virtual_machine_scale_set when using …

a9b29f4

…`additional_unattend_config` in `os_profile_windows_config` as already fixed for `azurerm_virtual_machine` in 443dd11

Fixed error message text referring to Windows instead of Linux in res…

d1f45f2

…ource `azurerm_virtual_machine_scale_set` when using `os_profile_linux_config`

Added acceptance test `TestAccAzureRMVirtualMachineScaleSet_basicWind…

ef45b1a

…ows_managedDisk`

dominik-lekse mentioned this pull request Aug 24, 2017

Fix address issue in azurerm_virtual_machine_scale_set when setting the winrm block #271

Merged

tombuildsstuff merged commit 0d25ba2 into hashicorp:master Sep 18, 2017

tombuildsstuff added a commit that referenced this pull request Sep 18, 2017

Updating to include #266

65bb980

dominik-lekse deleted the bugfix/vmss-unattendconfig-panic branch September 30, 2017 11:40

ghost locked and limited conversation to collaborators Apr 1, 2020

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Fix panic in `azurerm_virtual_machine_scale_set` resource with `additional_unattend_config` block #266

Fix panic in `azurerm_virtual_machine_scale_set` resource with `additional_unattend_config` block #266

dominik-lekse commented Aug 23, 2017 •

edited

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dominik-lekse commented Aug 23, 2017

tombuildsstuff commented Aug 24, 2017

dominik-lekse commented Aug 24, 2017

dominik-lekse commented Aug 24, 2017

dominik-lekse commented Sep 14, 2017

tombuildsstuff commented Sep 18, 2017

tombuildsstuff commented Sep 18, 2017

ghost commented Apr 1, 2020

Fix panic in azurerm_virtual_machine_scale_set resource with additional_unattend_config block #266

Fix panic in azurerm_virtual_machine_scale_set resource with additional_unattend_config block #266

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dominik-lekse commented Aug 23, 2017 • edited Loading

Affected Resource(s)

Panic Output

Expected Behavior

Actual Behavior

Steps to Reproduce

Acceptance tests

References

dominik-lekse commented Aug 23, 2017

tombuildsstuff commented Aug 24, 2017

dominik-lekse commented Aug 24, 2017

dominik-lekse commented Aug 24, 2017

dominik-lekse commented Sep 14, 2017

tombuildsstuff commented Sep 18, 2017

tombuildsstuff commented Sep 18, 2017

ghost commented Apr 1, 2020

Fix panic in `azurerm_virtual_machine_scale_set` resource with `additional_unattend_config` block #266

Fix panic in `azurerm_virtual_machine_scale_set` resource with `additional_unattend_config` block #266

dominik-lekse commented Aug 23, 2017 •

edited

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