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Testing an nginx Update with LXD

When it comes to containers, one of the benefits is the speed at which they deploy, making them ideal for testing changes. In this hands-on lab, we take an existing web container, copy it, then make some updates to `nginx`, ensuring we didn't break anything with our changes while still maintaining an isolated existing web environment.

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Path Info

Clock icon Beginner
Clock icon 30m
Clock icon Apr 03, 2020

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Table of Contents

  1. Challenge

    Deploy a Container Based on the web01 Container

    Take a snapshot of the existing container:

    lxc snapshot web01 1.0

    Create web-test based on this snapshot:

    lxc copy web01/1.0 web-test
    lxc start web-test
  2. Challenge

    Install nginx mainline from Source

    Copy the provided installation script to the new web-test container:

    lxc file push /tmp/files/labfiles/ web-test/tmp/

    Access the container:

    lxc exec web-test -- ash

    Remove the current version of nginx:

    rc-service nginx stop
    apk del nginx
    mv /etc/nginx /etc/nginx-old

    Run the script to install nginx 1.17.1:

    chmod +x /tmp/
    sh /tmp/
  3. Challenge

    Check the Website

    Confirm the website is working on the container itself:

    curl localhost

    Now check on the LXD server:

    lxc list
    curl <ip_of_web-test>

    To finish, take a snapshot of the completed build:

    lxc snapshot web-test nginx-build

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