Source image not found when searching by image name

This issue was originally opened by @v0lumehi as hashicorp/packer#8630. It was migrated here as a result of the Packer plugin split. The original body of the issue is below.

Hello guys,

I think I discovered a bug in the openstack builder. I have following packer version:

$ packer --version
1.5.1

This is my packer config and it is working fine:

{
  "variables": {
    "git_username": "",
    "git_password": ""
  },
  "builders": [{
    "type": "openstack",
    "flavor": "m.large",
    "image_name": "jenkins-chef-slave-nightly",
    "source_image": "ubuntu-18.04-x86_64-latest",
    "ssh_username": "ubuntu",
    "identity_endpoint": "https://my.great.cloud:5000/v3",
    "networks": ["6e80f6c6-3a24-44be-b15c-54b1f9d86c6e"],
    "floating_ip_network": "6541b7d0-db72-4a17-9d7e-de5d5b894ead",
    "security_groups": ["97e99840-e6f0-4fff-8f67-2afd3b8a3c43"],
    "use_blockstorage_volume": true,
    "volume_size": 10,
    "volume_name": "jenkins-chef-slave-nightly-volume",
    "image_disk_format": "qcow2",
    "metadata": {
      "image_name": "jenkins-chef-slave-nightly"
    }
  }],
  "provisioners": [{
      "type": "shell",
      "environment_vars": [
        "GIT_USERNAME={{user `git_username`}}",
        "GIT_PASSWORD={{user `git_password`}}"
      ],
      "scripts": [
        "./common/scripts/ubuntu/base.sh",
        "./common/scripts/ubuntu/docker.sh",
        "./common/scripts/ubuntu/chefdk.sh",
        "./common/scripts/ubuntu/users.sh",
        "./common/scripts/ubuntu/cleanup.sh"
      ]
    }
  ]
}

Now if I remove this block:

"use_blockstorage_volume": true,
"volume_size": 10,
"volume_name": "jenkins-chef-slave-nightly-volume",
"image_disk_format": "qcow2",

and run packer, packer throws this error:

$ packer build build.json
openstack output will be in this color.

==> openstack: Loading flavor: m.large
    openstack: Verified flavor. ID: 92506745-0305-4997-a58a-0f1a6be40a08
==> openstack: Creating temporary keypair: packer_5e26cac3-61bd-d7be-f4b1-463cc436cbc4 ...
==> openstack: Created temporary keypair: packer_5e26cac3-61bd-d7be-f4b1-463cc436cbc4
==> openstack: Launching server...
==> openstack: Launching server...
==> openstack: Error launching source server: Bad request with: [POST https://my.great.cloud:8774/v2.1/2b1777b0d2ec4263a6f0a63a0f313670/servers], error message: {"badRequest": {"message": "Invalid input for field/attribute imageRef. Value: ubuntu-18.04-x86_64-latest. u'ubuntu-18.04-x86_64-latest' is not valid under any of the given schemas", "code": 400}}
==> openstack: Terminating the source server:  ...
==> openstack: Error terminating server, may still be around: Resource not found
==> openstack: Deleting temporary keypair: packer_5e26cac3-61bd-d7be-f4b1-463cc436cbc4 ...
Build 'openstack' errored: Error launching source server: Bad request with: [POST https://my.great.cloud:8774/v2.1/2b1777b0d2ec4263a6f0a63a0f313670/servers], error message: {"badRequest": {"message": "Invalid input for field/attribute imageRef. Value: ubuntu-18.04-x86_64-latest. u'ubuntu-18.04-x86_64-latest' is not valid under any of the given schemas", "code": 400}}

==> Some builds didn't complete successfully and had errors:
--> openstack: Error launching source server: Bad request with: [POST https://my.great.cloud:8774/v2.1/2b1777b0d2ec4263a6f0a63a0f313670/servers], error message: {"badRequest": {"message": "Invalid input for field/attribute imageRef. Value: ubuntu-18.04-x86_64-latest. u'ubuntu-18.04-x86_64-latest' is not valid under any of the given schemas", "code": 400}}

==> Builds finished but no artifacts were created.

If I replace the source_image name with its ID, it's working properly:

$ packer build build.json
openstack output will be in this color.

==> openstack: Loading flavor: m.large
    openstack: Verified flavor. ID: 92506745-0305-4997-a58a-0f1a6be40a08
==> openstack: Creating temporary keypair: packer_5e26cb83-cafb-8502-3cd6-727f291199f5 ...
==> openstack: Created temporary keypair: packer_5e26cb83-cafb-8502-3cd6-727f291199f5
==> openstack: Launching server...
==> openstack: Launching server...
    openstack: Server ID: 0c516d5d-d23e-4ee4-8355-b78d28bdc6b3
==> openstack: Waiting for server to become ready...
==> openstack: Creating floating IP using network 6541b7d0-db72-4a17-9d7e-de5d5b894ead ...
    openstack: Created floating IP: 'f58318df-3644-420a-af6b-fdfa3c803549' (10.0.30.38)
==> openstack: Associating floating IP 'f58318df-3644-420a-af6b-fdfa3c803549' (10.0.30.38) with instance port...
    openstack: Added floating IP 'f58318df-3644-420a-af6b-fdfa3c803549' (10.0.30.38) to instance!
==> openstack: Using ssh communicator to connect: 10.0.30.38
==> openstack: Waiting for SSH to become available...
==> openstack: Connected to SSH!
==> openstack: Provisioning with shell script: ./common/scripts/ubuntu/base.sh
...
==> openstack: Deleting temporary keypair: packer_5e26cb83-cafb-8502-3cd6-727f291199f5 ...
Build 'openstack' finished.

==> Builds finished. The artifacts of successful builds are:
--> openstack: An image was created: 0983f994-6de4-4894-8fd1-4f700c2dc644

Do you got any idea what causes this? Am I overseeing something? Best Regards

hashicorp / packer-plugin-openstack

Source image not found when searching by image name #14