Build Ubuntu 18.04 with cloudinit support on proxmox VE

To create a ubuntu images from iso file is not flexible for us to clone and deploy a new virtual machine. we can now setting networking, hostname or other configuration before boot the server with configuration. If we want to expand the capicity of the disk, we need a lot of command to reach the goal.

With cloudinit images it is easy to do that.

Downlaod ubuntu 18.04 cloudinit images

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#download cloudinit images of ubuntu 18.04 for kvm

#change directory to dicrectory of image storage.
cd /var/lib/vz/images


#Option 1: For China User,Download images from ustc mirror for china users
wget http://mirrors.ustc.edu.cn/ubuntu-cloud-images/bionic/current/bionic-server-cloudimg-amd64.img

# Option 2: For other country,Download images from offical website.
wget https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-amd64.img

Create cloudinit template

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# create a new VM with name template-ubuntu18.04server-cloudinit
qm create 9000 --memory 4096 --net0 virtio,bridge=vmbr0  --name template-ubuntu18.04server-cloudinit

# import the downloaded disk to local-lvm storage
qm importdisk 9000 bionic-server-cloudimg-amd64.img local-lvm

# Attach the new disk to the vm as scsi driver

qm set 9000 --scsihw virtio-scsi-pci --scsi0 local-lvm:9000/vm-9000-disk-0.raw

Add Cloud-init CDROM drive

The next step is to configure a CDROM drive which will be used to pass the Cloud-init data to the VM.

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qm set 9000 --ide2 local-lvm:cloudinit

Make the virtual machine boot from cdrom to make cloud init running firstly.

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qm set 9000 --boot c --bootdisk scsi0

configure a serial console.

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qm set 9000 --serial0 socket --vga serial0

Convert the vm to template. We can not run the vm directly. By the way, to convert template to vm just edit vm configuration file to delete template: 1.

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vi /etc/pve/qemu-server/9000.conf
# The delete `template: 1`

Deploy virtual machine

Change Mode: to Full Clone.
Change Name: to ‘xa-wyn-autotest01`(This step also set hostname of the VM.)

Change VM settings.

Select the deployed VM on the pve gui.
Then Click Cloud-init.
Change “User” to any username you wanted.
Change “Password” for the user.
SSH public key: you can upload your ssh publickey to the vm.
“Options”|“Qemu-Agent” | check on “Qemua Agent” and “Run guest-trim after clone disk”.

Settings after booting.

After booting and the cloudinit will running to setting the vm as you wanted. After that we need change something base on our location.

Install some software

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apt update && apt -y dist-upgrade
apt install -y vim apt-transport-https qemu-guest-agent vim net-tools

Then you can check “Summary” of the VM with “IPS’. We cant seed the ip address in pve web gui.

Chang sourcelist to mirrors.ustc.com

Please select right sourcelist to match your linux version. mirrors.ustc.edu.cn repository file generator

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cat << EOF > /etc/apt/sources.list
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse

deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse

## Not recommended
# deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
EOF

apt update && apt -y dist-upgrade

Install docker

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apt-get -y install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common  \

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

apt-key fingerprint 0EBFCD88
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

sed -i 's/download.docker.com/mirrors.ustc.edu.cn\/docker-ce/g' /etc/apt/sources.list

apt-get update
apt-get install -y docker-ce docker-ce-cli containerd.io

Instlal Docker-compose

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sudo curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

sudo chmod +x /usr/local/bin/docker-compose

sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

Extend disk size of vm.

Shutdown the vm then change disk size as you wish ,After that start the vm. Extend disk is easy.

Enable SSH password Authentication

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sudo sed -i 's/PasswordAuthentication\ no/PasswordAuthentication\ yes/g' /et/c/ssh/sshd_config
sudo systemctl daemon-reload
sudo systemctl restart sshd

Build Ubuntu 18.04 server with cloudinit support