How to Install and Setup LXC on Fedora Linux 26

Learn how to efficiently install and set up LXC on Fedora Linux 26 for containers. Our LXC/LXD Support team is ready to assist you. 

Install and Setup LXC on Fedora Linux 26

LXC (Linux Containers) provides lightweight, high-performance virtualization using Linux kernel features. Fedora 26, with its modern kernel and strong security, is ideal for LXC, enabling efficient container creation, management, and scaling for both development and production environments.

Introduction to LXC

LXC, or Linux Containers, is a lightweight virtualization technology that uses Linux kernel features like namespaces and cgroups to create isolated environments called containers. Each container acts like a standalone Linux system, running its own processes while sharing the host kernel. Compared to traditional virtual machines, LXC offers near-native performance with minimal resource overhead.

Installing LXC on Fedora 26

To install LXC on Fedora 26, open a terminal and use the dnf package manager. Fedora often includes the required kernel features for containers, but the user tools must be installed manually. Run the following command:

sudo dnf install lxc lxc-templates lxc-extra debootstrap libvirt perl gpg

• lxc: Core Linux Containers tools.
• lxc-templates: Provides templates to create container filesystems.
• lxc-extra: Additional utilities and configurations for LXC.
• debootstrap, libvirt, perl, gpg: Dependencies needed for managing containers effectively.

After installation, verify it by listing LXC commands or checking its version. This sets up LXC and lets you easily LXC create container for running isolated environments.

Configuring LXC Services and Networking on Fedora 26

1. Install Packages

sudo dnf install lxc libvirt bridge-utils debootstrap dnsmasq

2. Start and Enable Services

sudo systemctl start libvirtd lxc

sudo systemctl enable libvirtd lxc

3. Set Up Network Bridge

• Enable bridge in /etc/sysconfig/lxc:

USE_LXC_BRIDGE="true"

• Optional bridge config in /etc/sysconfig/lxc-net:

LXC_BRIDGE="lxcbr0"

LXC_ADDR="10.0.3.1"

LXC_NETMASK="255.255.255.0"

LXC_NETWORK="10.0.3.0/24"

LXC_DHCP_RANGE="10.0.3.2,10.0.3.254"

sudo systemctl enable --now lxc-net.service

4. Verify

ip addr show lxcbr0

sudo cat /var/lib/misc/dnsmasq.leases

Creating and Managing Containers

1. Install Runtime

sudo dnf install podman   # Fedora

sudo apt install podman   # Debian/Ubuntu

2. Run a Container

podman run -it --name my-ubuntu ubuntu

docker run -it --name my-ubuntu ubuntu

3. List Containers

podman ps -a

docker ps -a

4. Stop a Container

podman stop my-ubuntu

docker stop my-ubuntu

5. Remove a Container

podman rm my-ubuntu

docker rm my-ubuntu

Monitoring and Snapshots in LXC on Fedora 26

Monitor Containers:

• Real-time resource usage:

sudo lxc-top

• Inside a container (CPU, memory, disk):

sudo lxc-attach -n container-name -- top

sudo lxc-attach -n container-name -- free -h

sudo lxc-attach -n container-name -- df -h

Manage Snapshots:

• Create:

sudo lxc-snapshot -n container-name

• List:

sudo lxc-snapshot -n container-name -L

• Restore:

sudo lxc-stop -n container-name

sudo lxc-snapshot -n container-name -r snapshot_name

• Delete:

sudo lxc-snapshot -n container-name -d snapshot_name

[Need assistance with a different issue? Our team is available 24/7.]

Conclusion 

In conclusion, learning how to install and set up LXC on Fedora Linux 26 provides a lightweight, efficient, and secure platform for running containers. With proper installation, networking, and management, you can create, monitor, and scale containers effectively for both development and production workloads.

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