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Creating Containers in Proxmox

Proxmox hypervisor also allows you to create containers which are lighter than virtual machines.

In the earlier chapters of the Proxmox series, you learned to install Proxmox and create new virtual machines in it.

Proxmox is different as it also allows you to create containers. As you may know, containers are more lightweight than virtual machines as they share the same kernel. Containers are virtualization at the operating system level, while virtual machines are virtualization at the hardware level.

Another advantage is that you can deploy tools and services using their container images.

In this tutorial, I will be showing you how to create an LXC container in ProxMox.

Creating a container in Proxmox

To start off, log in to your ProxMox web console and click on the "local" data store in the network. To the right of that you'll see an option called "CT Templates".

Click on the local data store from the side panel and select the CT Templates
Click on Templates

Click on the "Templates" button, and a list of available templates will appear.

A list of available templates is displayed
Available Templates

Go ahead and select the template you want to install. In my case, I'll be installing an Ubuntu 22.04 template. Click Download when you've selected the one you want. The download will proceed and will show TASK OK when completed.

Downloading the selected template. Once completed, you will get a TASK OK message
Downloading Template

You now have an Ubuntu 22.04 template ready to use. It will be available in your templates as seen below.

After download completed, you will now have an Ubuntu 22.04 template ready to use, and can be found listed on the window
Ubuntu Template Ready to Use

Click on "Create CT" and the LXC creation menu will appear as below.

Click on the Create CT button to get an LXC creation menu
LXC Creation Menu

Enter a hostname (name of container) and create and confirm a password. In my case I called my container "test". Everything else can be left as is.

Set hostname and enter password. You need to confirm the password too. Other fields can be left as is
Set hostname and password

Click on the Template tab, and arrow down on "template". Notice your storage is "local", which means that the template is residing on the local disk in your server. You'll see your template that you downloaded earlier pop up. Click on it and click "next" to move on.

On the Template tab, select Ubuntu, the one you downloaded, from the drop down list
Select Ubuntu Template

Enter the size of your virtual hard disk in GiB. I'm leaving mine at the default 8 gigs, but you can put whatever you want here, as long as you physically have that much storage to use on your host server/computer. Click "next" to move on.

Set the virtual hard disk size to 8 GiB or whatever your system can safely afford
Select Virtual Hard disk Size

Enter the number of CPU cores you want to assign to your container. I've assigned half of my available cores (4) here. Click "next".

On the CPU tab, set the number of CPU cores you can give. Here, it is given 4 cores
Set number of CPU Cores

Enter the amount of memory you wish to assign your container. Best practice is to assign half the amount of assigned memory as swap space.

Enter the amount of memory you wish to assign your container. A better practice is to assign half the amount of assigned memory as swap. Here, 512 MiB is given as memory and 256 Mib as Swap
Set Memory and Swap space

For network information, you can either allow DHCP to assign your container an IP address, or you can set up a static address in this section. I've decided to let DHCP handle it, as this is only a demonstration, but if this is a production server you may wish to consider assigning a static IP for convenience. Make sure to also enter your gateway (router) address in the appropriate section as well. IPV6 addressing can be set up in this section if required/desired.

Set the values for IPv4, IPv6, gateway address etc.
IPv4 and IPV6 settings

If you have specific DNS servers that you want to use, enter them in this section, otherwise ProxMox will just use the settings of your host server.

Enter values if you have some specific DNS Servers that you want to use. If not, ProxMox will use settings of your host server
DNS Settings

If everything looks good, go ahead and create the container after reviewing the settings you've just configured.

Review the settings you have configured and press Finish if everything is OK
Review Settings

The container will create itself, and will give you a TASK OK if everything went well.

Container will be created and if everything went well, you will get a TASK OK message
Container Creation

If you've clicked on "start after created" like I did, you'll notice that your container is now started and ready for use.

On the overview page, set start after created
Start after created in Overview

Go ahead and click on it, and click the "console" tab. Press enter a few times, and a login prompt will appear. No installation needed, these are much simpler than regular virtual machines.

System is ready to login, which can be done through the console tab on the right sidebar
Ready for Login

And that's all there is to it! Note that with virtual machines, it's possible to create Windows VMs, however you can only create Linux containers because they share a kernel.

Stay tuned for more Proxmox tutorials.

Doron is a long-time system mangler who got his first taste of Linux compiling and configuring ircd servers from source in the mid 90s. He then dwelled into web hosting operations through reseller accounts and dedicated servers. Offline he plays bass, and is an avid music lover. He co-owns an internet radio station called Genesis Radio which plays all kinds of music 24X7 and features events and live shows. If you need hosting services, you can check out his current business, Genesis Hosting