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Taking LXD Container Snapshots

One benefit Linux containers provide is the ability to quick spin up a number of containers. But from what are these containers based? LXD snapshots allow us to take point-in-time images of our containers and any work performed on these containers. In this lab, we take a preconfigured nginx-based web container and clone it to create the basis of a small web cluster.

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 15m
Last updated
Clock icon Apr 06, 2025

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Table of Contents

  1. Challenge

    Create a Snapshot

    Take a snapshot of the web01 container:

    lxc snapshot web01 1.0

  2. Challenge

    Launch and Review the New Container

    Launch the new container:

    lxc copy web01/1.0 web02
lxc start web02

    View the IPv4 address of the container and attempt to access a website:

    lxc list
curl \<ipv4\>

  3. Challenge

    Create a Second Snapshot

    Update the web01 container so nginx starts at boot:

    lxc exec web01 -- rc-update add nginx default

    Take a new snapshot:

    lxc snapshot web01 1.1

  4. Challenge

    Relaunch and Review the `web02` Container

    Remove the web02 container and relaunch it with the new snapshot:

    lxc stop web02
lxc delete web02
lxc copy web01/1.1 web02
lxc start web02

    Ensure nginx is working by running curl on the container's IP:

    lxc list
curl \<ipv4\>

  5. Challenge

    Remove the Erroneous Snapshot

    Remove the 1.0 snapshot:

    lxc delete web01/1.0
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Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

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