Fedora CoreOS (FCOS) was born from the merger of CoreOS Container Linux and Fedora Atomic Host. It is a minimal and monolithic operating system focused on running containerized applications. FCOS offers automatic updates and SELinux. Each stream (stable, testing and next) is launched every 2 weeks and promoted from one stream to another (next -> testing -> stable). In this way, updates have the opportunity to be tested over a long period of time.

How do I use Fedora CoreOS? We can use the stable stream and a basic QEMU image that we can run as a virtual machine. You can use coreos-installer to download that image.

$ sudo dnf install coreos-installer 
$ coreos-installer download --image-url https://builds.coreos.fedoraproject.org/prod/streams/stable/builds/32.20200907.3.0/x86_64/fedora-coreos-32.20200907.3.0 -qemu.x86_64.qcow2. xz 
$ xz -d fedora-coreos-32.20200907.3.0-qemu.x86_64.qcow2.xz 
$ ls 
fedora-core-32.20200907.3.0-qemu.x86_64.qcow2

To customize an FCOS system, you must provide a configuration file that will be used by Ignition to provision the system.

The following configuration creates a "basic" user, adds an SSH key to the authorized_key file, and creates a systemd service that uses podman to run a simple hello world container.

version: "1.0.0"
variant: fcos
passwd:
users:
- name: core
ssh_authorized_keys:
- ssh-ed25519 my_public_ssh_key_hash fcos_key
systemd:
units:
-
contents: |
[United]
Description = Run a hello world web service
After = network-online.target
Wants = network-online.target
[Service]
ExecStart = / bin / podman run --pull = always --name = hello --net = host -p 8080: 8080 quay.io/cverna/hello
ExecStop = / bin / podman rm -f hello
[Install]
WantedBy = multi-user.target
enabled: true
name: hello.service

After adding the SSH key to the configuration, save it as config.yaml, then use the Fedora CoreOS Config Transpiler (fcct) tool to convert this YAML configuration to a valid configuration (JSON format).

$ sudo dnf install fcct 
$ fcct -input config.yaml -output config.ign

To run the image, you can use the libvirt stack.

$ sudo dnf install virt-install

To clean, the following commands will delete the VM and the associated storage space.

$ virsh destroy fcos
$ virsh undefine --remove-all-storage fcos

Cititi mai multe stiri/noutati despre Fedora aici ... Source: fedoramagazine.org

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FlorinM                   gnulinux.ro
FlorinM
Utilizator Linux - Solus OS, pasionat de calatorii.
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