If a reboot resource is used in a chef provisioner packer fails

This issue was originally opened by @tas50 as hashicorp/packer#6346. It was migrated here as a result of the Packer plugin split. The original body of the issue is below.

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Chef includes a reboot resource which allows rebooting a system (imagine that). When the reboot resource runs it exits the Chef client with an exit code of 35. This code is considered a non-fatal code in Chef, but packer is picking that up as a failure and fails the whole build.

    virtualbox-iso:   * reboot[now] action reboot_now[2018-06-05T15:50:17-07:00] WARN: Rebooting system immediately, requested by 'now'
    virtualbox-iso: [2018-06-05T15:50:17-07:00] WARN: Rebooting system immediately, requested by 'now'
    virtualbox-iso:
    virtualbox-iso:
    virtualbox-iso:     Running handlers:
    virtualbox-iso:     Running handlers complete
    virtualbox-iso:     Chef Client finished, 30/38 resources updated in 02 minutes 52 seconds
    virtualbox-iso: [2018-06-05T15:50:17-07:00] WARN: Rebooting server at a recipe's request. Details: {:delay_mins=>0, :reason=>"Reboot by Chef", :timestamp=>2018-06-05 15:50:17 -0700, :requested_by=>"now"}
    virtualbox-iso: [2018-06-05T15:50:17-07:00] WARN: Rebooting server at a recipe's request. Details: {:delay_mins=>0, :reason=>"Reboot by Chef", :timestamp=>2018-06-05 15:50:17 -0700, :requested_by=>"now"}
    virtualbox-iso:
    virtualbox-iso:     Running handlers:
    virtualbox-iso: [2018-06-05T15:50:17-07:00] ERROR: Running exception handlers
    virtualbox-iso: [2018-06-05T15:50:17-07:00] ERROR: Running exception handlers
    virtualbox-iso:     Running handlers complete
    virtualbox-iso: [2018-06-05T15:50:17-07:00] ERROR: Exception handlers complete
    virtualbox-iso: [2018-06-05T15:50:17-07:00] ERROR: Exception handlers complete
    virtualbox-iso:     Chef Client failed. 30 resources updated in 02 minutes 52 seconds
    virtualbox-iso: [2018-06-05T15:50:17-07:00] FATAL: Stacktrace dumped to c:/windows/temp/packer-chef-solo/local-mode-cache/cache/chef-stacktrace.out
    virtualbox-iso: [2018-06-05T15:50:17-07:00] FATAL: Stacktrace dumped to c:/windows/temp/packer-chef-solo/local-mode-cache/cache/chef-stacktrace.out
    virtualbox-iso: [2018-06-05T15:50:17-07:00] FATAL: Please provide the contents of the stacktrace.out file if you file a bug report
    virtualbox-iso: [2018-06-05T15:50:17-07:00] FATAL: Please provide the contents of the stacktrace.out file if you file a bug report
    virtualbox-iso: [2018-06-05T15:50:17-07:00] FATAL: Chef::Exceptions::Reboot: Rebooting server at a recipe's request. Details: {:delay_mins=>0, :reason=>"Reboot by Chef", :timestamp=>2018-06-05 15:50:17 -0700, :requested_by=>"now"}
    virtualbox-iso: [2018-06-05T15:50:17-07:00] FATAL: Chef::Exceptions::Reboot: Rebooting server at a recipe's request. Details: {:delay_mins=>0, :reason=>"Reboot by Chef", :timestamp=>2018-06-05 15:50:17 -0700, :requested_by=>"now"}
==> virtualbox-iso: Deregistering and deleting VM...
==> virtualbox-iso: Deleting output directory...
Build 'virtualbox-iso' errored: Error executing Chef: Non-zero exit status: 35

==> Some builds didn't complete successfully and had errors:
--> virtualbox-iso: Error executing Chef: Non-zero exit status: 35

==> Builds finished but no artifacts were created.

[nywilken]

With the archival of this repository all open issues will be marked as read-only. If you wish to further discuss this plugin or any of its open issues we invite you to open a discussion on the Packer community forum.

More details on the plugin archiving process for this provisioner can be found on the Plans to Archive Unmaintained Packer Provisioner Plugins blog post.