155 lines
4.3 KiB
Markdown
155 lines
4.3 KiB
Markdown
# kvm-cloudimage
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Use cloud images on baremetal using libvirt/kvm
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Actually, you can select these base OS for Guests
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- Debian 12
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- Ubuntu 20.04
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- Ubuntu 22.04
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- FreeBSD 14.3 with UFS filesystem
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- FreeBSD 14.2 with ZFS filesystem
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## Pre-requisites
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* `openssh`
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* `arp`
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* `wget`
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* `curl`
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* `libvirt`
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In order to create openbsd images you will also need
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* `python3`
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* `sudo`
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* `signify` (Debian: `signify-openbsd` and `signify-openbsd-keys`)
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* `qemu-system-x86_64`
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## Links and credits
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In order to get libvirt installed
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- [Debian guide](https://wiki.debian.org/KVM)
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- [Ubuntu guide](https://documentation.ubuntu.com/server/how-to/virtualisation/libvirt/)
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- [Fedora guide](https://docs.fedoraproject.org/en-US/quick-docs/virtualization-getting-started/)
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Inspirational sites for the project
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- [https://blog.programster.org/create-debian-12-kvm-guest-from-cloud-image](https://blog.programster.org/create-debian-12-kvm-guest-from-cloud-image)
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- [https://earlruby.org/2023/02/quickly-create-guest-vms-using-virsh-cloud-image-files-and-cloud-init/](https://earlruby.org/2023/02/quickly-create-guest-vms-using-virsh-cloud-image-files-and-cloud-init/)
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- [https://sumit-ghosh.com/posts/create-vm-using-libvirt-cloud-images-cloud-init/)](https://sumit-ghosh.com/posts/create-vm-using-libvirt-cloud-images-cloud-init/)
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For openbsd vm with cloud init, [hcartiaux's openbsd-cloud-image](https://github.com/hcartiaux/openbsd-cloud-image.git) project is used.
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## Preparing host
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- Define [variables](env_scripts/common.sh) file (env_scripts/common.sh). It's recommended to use a folder on your home directory to avoid libvirt permission problems.
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- launch install.sh
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### AppArmor exception
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If needed
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```shell
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ln -s /etc/apparmor.d/usr.sbin.libvirtd /etc/apparmor.d/disable/
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apparmor_parser -R /etc/apparmor.d/usr.sbin.libvirtd
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```
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<!-- ### Create bridge network
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```shell
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sudo virsh --connect qemu:///session net-define /dev/stdin << EOF
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<network>
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<name>bridged-network</name>
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<forward mode='bridge'/>
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<bridge name='brbackend' />
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</network>
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EOF
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``` -->
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## Examples
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### Command usage
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```shell
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NAME
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./vm_manage.sh
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USAGE
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Usage: ./vm_manage.sh create -n NAME [-b BRIDGE] [-r RAM] [-c VCPUS] [-s DISK] [-v]
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./vm_manage.sh delete NAME
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./vm_manage.sh info NAME
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./vm_manage.sh connect NAME
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./vm_manage.sh list
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ACTIONS
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create Create a new virtual machine
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delete Delete a virtual machine
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list List all defined virtual machines
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info Show information about a virtual machine
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connect Connect to the console of a virtual machine
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OPTIONS
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-h Show this help message
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-n NAME Host name (required)
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-b BRIDGE Bridge interface name
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-r RAM RAM in MB (default: 1024)
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-c VCPUS Number of VCPUs (default: 1)
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-s DISK Disk size in GB (default: 10)
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-v Verbose mode
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AUTHOR
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Victor Gracia Enguita <victor@burufalla.ovh>
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COPYRIGHT
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This is free software; see the source for copying conditions.
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```
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### Create VM
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```shell
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./vm_manage.sh create -ntestMachine
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```
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A VM will ve created with default values. you can set then on [env_scripts/common.sh](env_scripts/common.sh) file.
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```shell
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./vm_manage.sh create -ntestMachine -r4098 -c4 -s100
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```
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A VM will be created with 4098 MB of RAM, 4 vCPUs and 100Gb of storage
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## List VMs
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```shell
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./vm_manage.sh list
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Id Nombre Estado
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-------------------------------
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7 debianTest ejecutando
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8 ubuntuTest ejecutando
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```
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## Connect to an VM
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```shell
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./vm_manage.sh connect debianTest
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```
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## Get ip of VM
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```shell
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./vm_manage.sh info ubuntuTest
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192.168.122.234
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```
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## Delete VMs
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Use as parameter machine name
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```shell
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./vm_dmanage.sh delete ubuntuTest
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Are you sure you want to remove the VM 'ubuntuTest' (y/N)? y
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Domain 'ubuntuTest' destroyed
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Domain 'ubuntuTest' has been undefined
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VM 'ubuntuTest' removed successfully.
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```
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## TODO
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- Maybe add more BSD flavours guests support
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- add non debian linux derivatives guests support
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<!-- ./vm_create.sh: línea 52: mkpasswd: orden no encontrada
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./vm_create.sh: línea 259: virt-install: orden no encontrada
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./vm_create.sh: línea 261: virsh: orden no encontrada
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qemu-img wget curl arp
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sudo apt install --no-install-recommends qemu-system libvirt-clients libvirt-daemon-system whois virtinst net-tools
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sudo chmod 750 /home/victor
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sudo usermod -a -G libvirt $(whoami)
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sudo usermod --append --groups earl libvirt-qemu -->
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