Docker Guide

Docker Introduction

<https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-debian-9>

Docker is an application that simplifies the process of managing application processes in containers.
Containers let you run your applications in resource-isolated processes. They’re similar to virtual machines, but containers
are more portable, more resource-friendly, and more dependent on the host operating system.

For a detailed introduction to the different components of a Docker container, check out The Docker Ecosystem: An Introduction to
Common Components.

You can check SWUpdate's online documentation at: http://sbabic.github.io/swupdate
This Introduction was taken from the SWUpdate README.md at: https://github.com/sbabic/swupdate

Yocto Integration

Recipes

Before you begin, get familiar with the Varicite Yocto Build Release guide.

Variscite provides the following image recipes:

• var-image-docker - Based on fsl-image-core with the following differences:
  • xxxxxxxxxxxxxx

Create a Docker-ready Image

• Follow steps 1-3 of the Yocto Build Release page.
• Build a recovery SD card and the var-image-swupdate image as the recovery image

$ cd 
$ MACHINE= DISTRO=

$ bitbake var-image-docker (for the rootfs to be installed on the eMMC)

Test Docker

check internet connection
root@imx8mm-var-dart:~# ping www.google.com

Get target ip address.
Open ssh terminal:
ssh root@<ip address>

root@imx8mm-var-dart:~# docker --version
Docker version 18.09.3-ce, build f5e591e

root@imx8mm-var-dart:~# docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
256ab8fe8778: Pull complete
Digest: sha256:f9dfddf63636d84ef479d645ab5885156ae030f611a56f3a7ac7f2fdd86d7e4e
Status: Downloaded newer image for hello-world:latest

root@imx8mm-var-dart:~# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest a29f45ccde2a 3 months ago 9.14kB
root@imx8mm-var-dart:~# docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:

1. The Docker client contacted the Docker daemon.

2. The Docker daemon pulled the "hello-world" image from the Docker Hub.

   (arm64v8)

3. The Docker daemon created a new container from that image which runs the

   executable that produces the output you are currently reading.

4. The Docker daemon streamed that output to the Docker client, which sent it

   to your terminal.

root@imx8mm-var-dart:~# docker pull ubuntu Using default tag: latest latest: Pulling from library/ubuntu b2f61026a351: Pull complete 5538fb30c42c: Pull complete f0b05810781a: Pull complete 0180a33352d6: Pull complete Digest: sha256:bec5a2727be7fff3d308193cfde3491f8fba1a2ba392b7546b43a051853a341d Status: Downloaded newer image for ubuntu:latest root@imx8mm-var-dart:~# root@imx8mm-var-dart:~# docker images REPOSITORY TAG IMAGE ID CREATED SIZE ubuntu latest 428b2f74b0fb 2 weeks ago 57.7MB hello-world latest a29f45ccde2a 3 months ago 9.14kB

root@imx8mm-var-dart:~# docker run -it ubuntu
root@8637148015f5:/# apt update
.................................
Fetched 16.3 MB in 11s (1471 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
12 packages can be upgraded. Run 'apt list --upgradable' to see them.

root@8637148015f5:/# apt install nodejs
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:

 ca-certificates libc-ares2 libhttp-parser2.7.1 libicu60 libnghttp2-14 libssl1.0.0 libssl1.1 libuv1 nodejs-doc openssl

The following NEW packages will be installed:

 ca-certificates libc-ares2 libhttp-parser2.7.1 libicu60 libnghttp2-14 libssl1.0.0 libssl1.1 libuv1 nodejs nodejs-doc openssl

0 upgraded, 11 newly installed, 0 to remove and 12 not upgraded.
Need to get 15.6 MB of archives.
After this operation, 62.8 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
...........................................
Updating certificates in /etc/ssl/certs...
0 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...
done.

root@8637148015f5:/# node -v
v8.10.0
root@8637148015f5:/# exit
root@imx8mm-var-dart:~# docker-compose --version
docker-compose version 1.21.2, build e7de1bc
root@imx8mm-var-dart:~#