Clarification on keep_vm, format, output_directory, and sr_name.

[ddelnano]

Clarification on keep_vm, format, output_directory, and sr_name.

[Shackelford-Arden]

@DesignsWithDavid , now that it's been a while, I'm curious if you've come to better understand any of these points as you've used the plugin more? One might say I'm one of the "next newbie"s you mentioned 😄

[DesignsWithDavid]

Unfortunately, I am still unclear on these terms.

[CoolReaper]

This is my understanding as I've done some extensive testing:

The idea of using Packer is to create a template VM, therefore, once Packer runs all its tasks, it saves the VM and its disks as template on the host. Additionally it might export to a path. Here is where format and output_directory come into place.
They define in which format and to where you want the export to happen.

For Format if you set to none, nothing is exported if build is successful, but the template is still created if build is successful.

Keep_VM I believe has some bugs, but the idea is to define whether the VM should be deleted if Packer fails some task or not. Indeed I've also experimented with it and the VM will always get deleted unless I set keep_VM to always. Still, even if set to always, if the build is successful, it will create a template and delete the VM, so I believe that Keep_VM should be understood as "what should Packer do if build is not successful". I haven't found any use case for "on_success". I think it doesn't work. Setting it to "Always" will leave the VM running if you cancel the build. Setting it to "Never" will delete the VM in all use cases.

SR_Name is definitely not related with any kind of output. it's the Storage Repository where the VM disks will be created.

And yes, I also found the documentation quite confusing. Hope this helps somehow.