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A Cloud Guru

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

Level

Beginner

Duration

30m

Published

Apr 03, 2020

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
```

Challenge

Install nginx mainline from Source

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

lxc file push /tmp/files/labfiles/nginx-script.sh 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/nginx-script.sh
sh /tmp/nginx-script.sh

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
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.