Prepare an ISO image for use with the cloud platform

If you have uploaded to the image storage 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.

Prepare a Windows image

Prepare the ISO image locally.
Upload the ISO image to the image storage.
Modify the Windows image properties.

1. Prepare the ISO image locally

On your local computer, extract the ISO image archive to a separate directory using an archiver, for example 7-zip, WinRAR, tar.
Download the VirtiO drivers as an ISO image from the Fedora People repository.
Create a Drivers directory.
Extract the ISO image with VirtiO drivers to the Drivers directory using an archiver, for example 7-zip, WinRAR, UltraISO.
Transfer the Drivers directory containing the VirtiO drivers to the directory of the Windows ISO image you unpacked in step 1.
Install the DISM++ utility for image management.
Open DISM++.
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

Use the Upload and create an image from a file subsection of the Upload and create an image guide.

Specify:

file — the image that you prepared in step 1;
OS — Windows;
image format — iso;
container format — bare.

3. Modify image properties

Open the OpenStack CLI.
Display the IDs of available images:
```
openstack image list
```
A list of images will appear in the response. Copy the ID of the image you uploaded in step 2.
Optional: view image properties:
```
openstack image show
```

Add the necessary properties:

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 \
    <image_id>

Specify <image_id> — the ID of the image you copied in step 2.

Prepare a Linux image

For your information

This is a guide for the Oracle Linux image. For other distributions, utilities, repositories, and file locations may differ.

Upload the ISO image to the image storage.
Create a cloud server from the uploaded image.
Configure the cloud server.
Create an image from the cloud server boot disk.

1. Upload the ISO image to the image storage

Use the Upload and create an image guide.

2. Create a cloud server from the uploaded image

Use the Create a cloud server guide.

Select the uploaded image as the source and a network volume as the boot disk.

3. Configure the cloud server

Connect to the cloud server.

Add the Selectel OpenStack repositories to the selectel-openstack.repo file:

cat <<EOF > /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

Update the package manager repository list:
```
dnf update
```

Install the packages:

dnf install crontab-randomizer \
fstrim-blocks qemu-guest-agent \
set-root-pw \
cloud-init \
cloud-utils-growpart \
compat-openssl10

Go to the /etc/cloud/cloud.cfg.d/ directory to create cloud-init configuration files:
```
cd /etc/cloud/cloud.cfg.d/
```

Disable the creation of the ubuntu: user:

cat <<EOF > 10_no_default_users.cfg
users: []
EOF

Add data sources for cloud-init-datasources:

cat <<EOF > 91-dib-cloud-init-datasources.cfg
datasource_list: [  ConfigDrive, Ec2, None ]
EOF

Disable the warning about using cloud-init and EC2:

cat <<EOF > 92-ec2-datasource.cfg
#cloud-config
datasource:
    Ec2:
        strict_id: false
EOF

Add boot settings:

cat <<EOF > 99_boot_routines.cfg
bootcmd:
    - sed -i '/^;/d' /etc/resolv.conf
EOF

Prevent cloud-init from disabling EC2 metadata:

cat <<EOF > 99_enable_ec2.cfg
disable_ec2_metadata: false
EOF

Add first-boot settings:

cat <<EOF > 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

Prevent the disabling of root access via SSH:

cat <<EOF > 99_keep_root_user.cfg
disable_root: false
EOF

Change the time zone:

cat <<EOF > 99_location.cfg
locale: en_US.UTF-8
timezone: UTC
EOF

Add permission for password authentication via SSH:

cat <<EOF > 99_ssh_settings.cfg
ssh_pwauth: true
no_ssh_fingerprints: true
ssh_deletekeys: true
EOF

Configure auto-start for services to apply changes and ensure correct operation after the server reboots:

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

Perform a hard reboot of the server.

Connect to the cloud server 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:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 an image from the cloud server boot disk.
Open the OpenStack CLI.

Add properties for the created image:

openstack image set --property x_sel_image_owner=Selectel <image>
openstack image set --property hw_qemu_guest_agent=yes <image>

Specify <image> — the image ID or name. You can view the list using openstack image list --private

Optional: after creating the image from the disk, delete the cloud server.