Hands on 1 - Discovering

    The goal of this hands-on is to:

    • locally run a Flatcar instance
    • boot the instance and SSH into
    • run Nginx container on the instance

    Step-by-step

    # create a working directory
mkdir flatcar; cd flatcar
# get the qemu helper
wget https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_qemu.sh
# get the latest stable release for qemu
wget https://stable.release.flatcar-linux.net/amd64-usr/current/flatcar_production_qemu_image.img
# create a backup to always have a fresh image around
mv flatcar_production_qemu_image.img flatcar_production_qemu_image.img.fresh
# make the qemu helper executable
chmod +x flatcar_production_qemu.sh
# before starting, make sure you boot a fresh image
cp -i --reflink=auto flatcar_production_qemu_image.img.fresh flatcar_production_qemu_image.img
# starts the flatcar image in console mode
./flatcar_production_qemu.sh -- -display curses

    NOTE: it’s possible to connect to the instance via SSH:

    $ cat ~/.ssh/config
Host flatcar
	User core
	StrictHostKeyChecking no
	UserKnownHostsFile /dev/null
	HostName 127.0.0.1
	Port 2222
$ ssh flatcar

    Once on the instance, you can try things and run a docker image:

    # run an nginx docker image
docker run --rm -p 80:80 -d nginx
# assert it works
curl localhost

    Resources

    Demo

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