Running Containers
Example configuration
The following Butane config snippet configures the systemd hello.service
to run busybox.
You may be able to use local file references to systemd units instead of inlining them. See Using butane’s --files-dir Parameter to Embed Files for more information.
|
Example for running busybox using systemd and podman
variant: fcos
version: 1.5.0
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
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: 1.5.0
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
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: 1.5.0
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
[Install]
WantedBy=multi-user.target
For more information
See the etcd documentation for more information on running etcd in containers and how to set up multi-node etcd.
Want to help? Learn how to contribute to Fedora Docs ›