Implement Linode Image Data Source

[zliang-akamai]

📝 Description

Built on top of #208. If we can merge #208 before this PR and then rebase this branch, the number of changed lines in this PR may be reduced.

TODO:

• Needs next linodego release containing linode/linodego@73f38b5 done
• Unit/integration test implementation is in progress done

✔️ How to Test

Automated Test

make test

Manual Test

Build packer plugin locally.

go build

Place this content below into a file call test.pkr.hcl.

data "linode-image" "latest_ubuntu" {
    id_regex = "linode/ubuntu.*"
    latest = true
}

source "linode" "example" {
  image             = data.linode-image.latest_ubuntu.id
  image_description = "My Private Image"
  image_label       = "my-packaer-private-linode-image-test"
  instance_label    = "temporary-linode-image"
  instance_type     = "g6-nanode-1"
  region            = "us-mia"
  ssh_username      = "root"
}

build {
  sources = ["source.linode.example"]
}

data "linode-image" "latest_ubuntu_lts" {
    label_regex = "Ubuntu [0-9]+\\.[0-9]+ LTS"
    latest = true
}

data "linode-image" "ubuntu22_lts" {
    id = "linode/ubuntu22.04"
}

Run build command

packer build .

Verify the config on the test Linode is called My Ubuntu 23.10, meaning the latest Ubuntu was selected.

You can also switch image output from other 2 data sources and verify the config name accordingly.

[lgarber-akamai]

Tests are all passing locally and everything seems to be working well in my local testing (dx-devenv), excellent work!

[yec-akamai]

Works well on my end. Nice work!