Packerでitamae(HCL2)

build {
  sources = ...

  provisioner "shell-local" {
    inline = [
      "echo '${build.SSHPrivateKey}' > /tmp/packer-session.pem",
      "bundle",
      "bundle exec itamae ssh -u ${build.User} -h ${build.Host} -i /tmp/packer-session.pem recipe.rb"
    ]
  }
}

bundle installしないといけないっぽい

その他: Port, User, Password, SSHPrivateKeyもbuildから取得できる
https://www.packer.io/docs/templates/engine