fedora-docs-l10n/fedora-coreos/master/pages/tutorial-containers — English @ Fedora Weblate: Add an SSH Key for the `core` user from the …

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	Setting up SSH access and starting containers at boot
	Complete all the steps described in the xref:tutorial-setup.adoc[initial setup page] before starting this tutorial. Make sure you have create file `ssh-key.pub` following the instructions provided in the https://docs.fedoraproject.org/en-US/fedora-coreos/tutorial-setup/#_ssh_public_key[prerequisites] for the tutorial. We will use this key in the Butane configuration file that we are about to write.
	In this tutorial, we will set up SSH access and start a container at boot. Fedora CoreOS is focused on running applications/services in containers thus we recommend trying to run containers and avoid modifying the host directly. Running containers and keeping a pristine host layer makes automatic updates more reliable and allows for separation of concerns with the Fedora CoreOS team responsible for the OS and end-user operators/sysadmins responsible for the applications.
	As usual, we will set up console autologin, a hostname, systemd pager configuration, but we will also:
	Add an SSH Key for the `core` user from the local `ssh-key.pub` file.
	Add a systemd service (`failure.service`) that fails on boot.
	Add a running container via a Podman https://docs.podman.io/en/latest/markdown/podman-systemd.unit.5.html[quadlet systemd.unit container file].
	This `etcd-member.container` will then be associated with a `etcd-member.service` on the running system.
	`etcd-member.service` will launch and manage the lifecycle of the container using `podman`.
	Writing the Butane config and converting to Ignition
	Similarly to what we did in the second provisioning scenario, we will write the following Butane config in a file called `containers.bu`:
	Example with automatic serial console login, SSH key, and multiple systemd units
	variant: fcos version: {butane-latest-stable-spec} passwd: users: - name: core ssh_authorized_keys_local: - ssh-key.pub systemd: units: - name: serial-getty@ttyS0.service dropins: - name: autologin-core.conf contents: \| [Service] # Override Execstart in main unit ExecStart= # Add new Execstart with `-` prefix to ignore failure ExecStart=-/usr/sbin/agetty --autologin core --noclear %I $TERM TTYVTDisallocate=no - name: failure.service enabled: true contents: \| [Service] Type=oneshot ExecStart=/usr/bin/false RemainAfterExit=yes
	[Install] WantedBy=multi-user.target storage: files: - path: /etc/hostname mode: 0644 contents: inline: \| tutorial - path: /etc/profile.d/systemd-pager.sh mode: 0644 contents: inline: \| # Tell systemd to not use a pager when printing information export SYSTEMD_PAGER=cat - path: /etc/containers/systemd/etcd-member.container mode: 0644 contents: inline: \| [Unit] Description=Run a single node etcd After=network-online.target Wants=network-online.target
	[Container] ContainerName=etcd Image=quay.io/coreos/etcd:latest Network=host Volume=etcd-data:/etcd-data Exec=/usr/local/bin/etcd \ --name node1 --data-dir /etcd-data \ --initial-advertise-peer-urls http://127.0.0.1:2380 \ --listen-peer-urls http://127.0.0.1:2380 \ --advertise-client-urls http://127.0.0.1:2379 \ --listen-client-urls http://127.0.0.1:2379 \ --initial-cluster node1=http://127.0.0.1:2380
	[Install] WantedBy=multi-user.target
	Run Butane to convert that to an Ignition config:
	butane --pretty --strict --files-dir=./ containers.bu --output containers.ign
	Now let's provision it:
	# Setup the correct SELinux label to allow access to the config chcon --verbose --type svirt_home_t containers.ign

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