Added Ubuntu cloud image package

cloud-init/ubuntu-cloud/README.md

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+# Ubuntu-cloud cloud-init-data image for GNS3 virtual appliance
+
+Generated using the following commands:
+
+```
+printf "#cloud-config\n\npassword: ubuntu\nchpasswd: { expire: False }\nssh_pwauth: True\n" > user-data
+printf "instance-id: ubuntu-cloud\nlocal-hostname: ubuntu-cloud\n" > meta-data
+mkisofs -output ubuntu-cloud-init-data.iso -volid cidata -joliet -rock user-data meta-data
+```

cloud-init/ubuntu-cloud/meta-data

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+instance-id: ubuntu-cloud
+local-hostname: ubuntu-cloud

cloud-init/ubuntu-cloud/user-data

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+#cloud-config
+
+password: ubuntu
+chpasswd: { expire: False }
+ssh_pwauth: True

packer/ubuntu/jammy.json

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+{
+  "builders": [
+    {
+      "disk_compression": true,
+      "disk_image": true,
+      "disk_interface": "virtio-scsi",
+      "disk_size": "{{user `disk_size`}}",
+      "headless": true,
+      "iso_checksum": "sha256:{{user `iso_checksum`}}",
+      "iso_url": "{{user `iso_url`}}",
+      "net_device": "virtio-net-pci",
+      "qemuargs": [
+        [
+          "-cdrom",
+          "ubuntu-cloud-init-data.iso"
+        ]
+      ],
+      "shutdown_command": "sudo shutdown -P now",
+      "ssh_password": "ubuntu",
+      "ssh_timeout": "120s",
+      "ssh_username": "ubuntu",
+      "type": "qemu",
+      "vm_name": "{{user `vm_name`}}"
+    }
+  ],
+  "provisioners": [
+    {
+      "execute_command": "sudo env {{ .Vars }} {{ .Path }}",
+      "script": "scripts/{{user `setup_script`}}",
+      "type": "shell"
+    },
+    {
+      "execute_command": "sudo env {{ .Vars }} {{ .Path }}",
+      "script": "scripts/upgrade-os.sh",
+      "type": "shell"
+    },
+    {
+      "execute_command": "sudo env {{ .Vars }} {{ .Path }}",
+      "script": "scripts/post_setup.sh",
+      "type": "shell"
+    }
+  ],
+  "variables": {
+    "disk_size": "10G",
+    "iso_checksum": "8ae2ebcaf1320ea5b8d7003b44f2dbcb4ecad8cc53a3170e96d9ff1bbe8f78b8",
+    "iso_url": "https://cloud-images.ubuntu.com/jammy/20221219/jammy-server-cloudimg-amd64.img",
+    "setup_script": "jammy.sh",
+    "vm_name": "ubuntu-jammy.qcow2"
+  }
+}
+

packer/ubuntu/scripts/jammy.sh

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+#!/bin/sh
+set -ex
+
+# create GNS3 user
+printf 'gns3\ngns3\n' | adduser --gecos 'GNS3' gns3

packer/ubuntu/scripts/post_setup.sh

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+#!/bin/sh
+set -ex
+
+# clear repository
+apt-get clean
+
+apt-get autoremove --yes
+
+rm -rf /var/lib/{apt,dpkg,cache,log}/
+
+# clear unused space
+echo 'Clearing unused space...'
+dd if=/dev/zero bs=1M of=/zero >/dev/null 2>&1 || true; rm -f /zero
+sync

packer/ubuntu/scripts/upgrade-os.sh

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+#!/bin/sh
+set -ex
+
+# clear repository
+apt update
+
+apt upgrade -y

packer/ubuntu/ubuntu-cloud-init-data.iso

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+../../cloud-init/ubuntu-cloud/ubuntu-cloud-init-data.iso