--- title: "Prepare an ISO image for use with the cloud platform" sidebar_label: "Prepare an image for the cloud platform" sidebar_position: 5 description: "How to prepare an uploaded ISO image for compatibility with the Selectel cloud platform" --- import Formbricks from '@theme/MDXComponents/Formbricks' # Prepare an ISO image for use with the cloud platform If you [have uploaded to the image storage](/cloud-servers/images/create-image.mdx) an ISO image with an operating system distribution, we recommend making it fully compatible with the Selectel cloud platform. From a compatible image, you can create cloud servers that will have the same functionality as servers from [ready-made images](/cloud-servers/images/about-images.mdx#default-images). ## Prepare a Windows image \{#create-windows-image} 1. [Prepare the ISO image locally](#create-windows-image-locally). 2. [Upload the ISO image to the image storage](#upload-windows-image). 3. [Modify the Windows image properties](#modify-windows-image-properties). ### 1. Prepare the ISO image locally \{#create-windows-image-locally} 1. On your local computer, extract the ISO image archive to a separate directory using an archiver, for example `7-zip`, `WinRAR`, `tar`. 2. Download the VirtiO drivers as an ISO image from the [Fedora People](https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/archive-virtio/virtio-win-0.1.266-1/) repository. 3. Create a Drivers directory. 4. Extract the ISO image with VirtiO drivers to the Drivers directory using an archiver, for example `7-zip`, `WinRAR`, `UltraISO`. 5. Transfer the Drivers directory containing the VirtiO drivers to the directory of the Windows ISO image you unpacked in step 1. 6. Install the [DISM++](https://www.chuyu.me/en-US/) utility for image management. 7. Open DISM++. 8. Build the installation image; to do this, go to the **Toolkit** section and select **ISO Maker**. ### 2. Upload the ISO image to the image storage \{#upload-windows-image} Use the [Upload and create an image from a file](/cloud-servers/images/create-image.mdx#upload-image-from-file) subsection of the Upload and create an image guide. Specify: * file — the image that you [prepared in step 1](#create-windows-image); * OS — Windows; * image format — `iso`; * container format — `bare`. ### 3. Modify image properties \{#modify-windows-image-properties} 1. [Open the OpenStack CLI](/cloud-servers/tools/openstack-cli/). 2. Display the IDs of available images: ```bash openstack image list ``` The response will contain a list of images. Copy the ID of the image you [uploaded in step 2](#upload-windows-image). 3. Optional: view image properties: ```bash openstack image show ``` 4. Add the necessary properties: ```bash openstack image set \ --property hw_disk_bus=scsi \ --property hw_firmware_type=uefi \ --property hw_qemu_guest_agent=yes \ --property hw_scsi_model=virtio-scsi \ --property os_type=windows \ --property x_sel_image_agent_type=cloudbase-init \ --property x_sel_image_os_arch=amd64 \ --property x_sel_image_os_dist=windows \ --property x_sel_image_os_type=windows \ --property x_sel_image_type=master \ --property x_sel_kpti_patch=true \ ``` Specify `` — the ID of the image you copied in step 2. ## Prepare a Linux image \{#create-linux-image} :::info This is a guide for the Oracle Linux image. For other distributions, utilities, repositories, and file locations may differ. ::: 1. [Upload the ISO image to the image storage](#upload-linux-image). 2. [Create a cloud server from the uploaded image](#create-cloud-server). 3. [Configure the cloud server](#configure-server). 4. [Create an image from the cloud server boot disk](#create-linux-image-from-volume). ### 1. Upload the ISO image to the image storage \{#upload-linux-image} Use the [Upload and create an image](/cloud-servers/images/create-image.mdx) guide. ### 2. Create a cloud server from the uploaded image \{#create-cloud-server} Use the [Create a cloud server](/cloud-servers/create/create-server.mdx) guide. Select the uploaded image as the source and a network volume as the boot disk. ### 3. Configure the cloud server \{#configure-server} 1. [Connect to the cloud server](/cloud-servers/manage/connect-to-server.mdx). 2. Add the Selectel OpenStack repositories to the `selectel-openstack.repo` file: ```bash cat < /etc/dnf.repos.d/selectel-openstack.repo [selectel-openstack] name=selectel-openstack baseurl=http://mirror.selectel.org/rpm/centos/7/x86_64 gpgcheck=1 gpgkey=http://mirror.selectel.org/selectel-openstack.key EOF ``` 3. Update the package manager repository list: ```bash dnf update ``` 4. Install the packages: ```bash dnf install crontab-randomizer \ fstrim-blocks qemu-guest-agent \ set-root-pw \ cloud-init \ cloud-utils-growpart \ compat-openssl10 ``` 5. Go to the `/etc/cloud/cloud.cfg.d/` directory to create cloud-init configuration files: ```bash cd /etc/cloud/cloud.cfg.d/ ``` 6. Disable the creation of the `ubuntu:` user: ```bash cat < 10_no_default_users.cfg users: [] EOF ``` 7. Add data sources for cloud-init-datasources: ```bash cat < 91-dib-cloud-init-datasources.cfg datasource_list: [ ConfigDrive, Ec2, None ] EOF ``` 8. Disable the warning about using cloud-init and EC2: ```bash cat < 92-ec2-datasource.cfg #cloud-config datasource: Ec2: strict_id: false EOF ``` 9. Add boot settings: ```bash cat < 99_boot_routines.cfg bootcmd: - sed -i '/^;/d' /etc/resolv.conf EOF ``` 10. Prevent cloud-init from disabling EC2 metadata: ```bash cat < 99_enable_ec2.cfg disable_ec2_metadata: false EOF ``` 11. Add first-boot settings: ```bash cat < 99_first_boot_routines.cfg runcmd: - sed -i '/NetworkManager/d' /etc/resolv.conf - sed -i '/^search/d' /etc/resolv.conf - set-root-pw 2> /dev/null - crontab-randomizer EOF ``` 12. Prevent the disabling of root access via SSH: ```bash cat < 99_keep_root_user.cfg disable_root: false EOF ``` 13. Change the time zone: ```bash cat < 99_location.cfg locale: en_US.UTF-8 timezone: UTC EOF ``` 14. Add permission for password authentication via SSH: ```bash cat < 99_ssh_settings.cfg ssh_pwauth: true no_ssh_fingerprints: true ssh_deletekeys: true EOF ``` 15. Configure auto-start for services to apply changes and ensure correct operation after the server reboots: ```bash systemctl enable cloud-init systemctl enable cloud-init.service systemctl enable cloud-config.service systemctl enable cloud-final.service systemctl enable qemu-guest-agent.service systemctl enable cockpit.socket ``` 16. [Perform a hard reboot of the server](/cloud-servers/manage/reboot-server.mdx#perform-hard-reboot). 17. [Connect to the cloud server](/cloud-servers/manage/connect-to-server.mdx) again. A message will appear stating that the host identity has changed. This means that cloud-init is working successfully when the operating system boots: ```bash @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. ``` ### 4. Create an image from the cloud server boot disk \{#create-linux-image-from-volume} 1. [Create an image from the cloud server boot disk](/cloud-servers/images/create-image.mdx#create-image-from-volume). 2. [Open the OpenStack CLI](/cloud-servers/tools/openstack-cli/). 3. Add properties for the created image: ```bash openstack image set --property x_sel_image_owner=Selectel openstack image set --property hw_qemu_guest_agent=yes ``` Specify `` — the image ID or name. You can view the list using `openstack image list --private` 4. Optional: after creating the image from the disk, [delete the cloud server](/cloud-servers/manage/delete-server.mdx).