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Running Containers
Introduction
Fedora CoreOS ships with both the `docker` CLI tool (as provided via https://mobyproject.org/[Moby]) and https://podman.io[podman] installed. This page explains how to use systemd units to start and stop containers with podman.
Example configuration
The following Butane config snippet configures the systemd `hello.service` to run https://www.busybox.net[busybox].
You may be able to use local file references to systemd units instead of inlining them. See xref:tutorial-services.adoc#_using_butanes__files_dir_parameter_to_embed_files[Using butane's `--files-dir` Parameter to Embed Files] for more information.
Example for running busybox using systemd and podman
variant: fcos
version: {butane-latest-stable-spec}
systemd:
units:
- name: hello.service
enabled: true
contents: |
[Unit]
Description=MyApp
After=network-online.target
Wants=network-online.target
[Service]
TimeoutStartSec=0
ExecStartPre=-/bin/podman kill busybox1
ExecStartPre=-/bin/podman rm busybox1
ExecStartPre=/bin/podman pull busybox
ExecStart=/bin/podman run --name busybox1 busybox /bin/sh -c "trap 'exit 0' INT TERM; while true; do echo Hello World; sleep 1; done"
[Install]
WantedBy=multi-user.target
Example for running busybox using Podman Quadlet
https://docs.podman.io/en/latest/markdown/podman-systemd.unit.5.html[Podman Quadlet] is functionality included in podman that allows starting containers via systemd using a systemd generator. The example below is the same `hello.service` that was previously shown but deployed via the Podman Quadlet functionality.
variant: fcos
version: {butane-latest-stable-spec}
storage:
files:
- path: /etc/containers/systemd/hello.container
contents:
inline: |
[Unit]
Description=Hello Service
Wants=network-online.target
After=network-online.target
[Container]
ContainerName=busybox1
Image=docker.io/busybox
Exec=/bin/sh -c "trap 'exit 0' INT TERM; while true; do echo Hello World; sleep 1; done"
[Install]
WantedBy=multi-user.target
Running etcd
https://etcd.io[etcd] is not shipped as part of Fedora CoreOS. To use it, run it as a container, as shown below.
Butane config for setting up single node etcd
variant: fcos
version: {butane-latest-stable-spec}
systemd:
units:
- name: etcd-member.service
enabled: true
contents: |
[Unit]
Description=Run single node etcd
After=network-online.target
Wants=network-online.target
[Service]
ExecStartPre=mkdir -p /var/lib/etcd
ExecStartPre=-/bin/podman kill etcd
ExecStartPre=-/bin/podman rm etcd
ExecStartPre=-/bin/podman pull quay.io/coreos/etcd
ExecStart=/bin/podman run --name etcd --volume /var/lib/etcd:/etcd-data:z --net=host quay.io/coreos/etcd:latest /usr/local/bin/etcd --data-dir /etcd-data --name node1 \
--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
ExecStop=/bin/podman stop etcd
For more information
See the https://etcd.io/docs/latest/op-guide/container/#docker[etcd documentation] for more information on running etcd in containers and how to set up multi-node etcd.

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String updated in the repository
[Container]
ContainerName=busybox1
Image=docker.io/busybox
Exec=/bin/sh -c "trap 'exit 0' INT TERM; while true; do echo Hello World; sleep 1; done"
[Container]
ContainerName=busybox1
Image=docker.io/busybox
Exec=/bin/sh -c "trap 'exit 0' INT TERM; while true; do echo Hello World; sleep 1; done"
a year ago
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type: delimited block -
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no-wrap, placeholders:r"`[\w.\/\-_=@&*:$●+~()\] ]*`", read-only
Source string location
./pages/running-containers.adoc:59
String age
a year ago
Last updated
a year ago
Source string age
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Translation file
pot/master/pages/running-containers.pot, string 14