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podman_overview.md

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GeoServer Cloud with podman

Why podman?

Podman's aim is to be a secure open source replacement for Docker and not depending on one daemon with root rights in order to prevent being a single point failure.

A further design goal is being able to run containers with only user privileges.

https://cloudnweb.dev/2019/10/heres-why-podman-is-more-secured-than-docker-devsecops/

Additionally Podman can create and play Kubernetes files for easing migration to k8s:

https://www.redhat.com/sysadmin/compose-kubernetes-podman

Integration with systemd including dependencies is also a feature of podman.

https://fedoramagazine.org/auto-updating-podman-containers-with-systemd/

For futher information please have a look at the project page:

https://podman.io/whatis.html

Required packages for different distributions

RHEL 8.5 / CentOS 8.5 (Stream) and newer

sudo dnf -y install podman podman-plugins

Ubuntu

Follow Podman's Ubuntu installation instructions to install from the Kubic repo. The default version installed through apt install podman (currently 3.0.1) may be too old.

. /etc/os-release
echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/ /" | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
curl -L "https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_${VERSION_ID}/Release.key" | sudo apt-key add -
sudo apt-get update
sudo apt-get -y upgrade
sudo apt-get -y install podman
podman version
Version:      3.4.2
API Version:  3.4.2
Go Version:   go1.16.6
Built:        Wed Dec 31 21:00:00 1969
OS/Arch:      linux/amd64

Running Geoserver Cloud

Traditional way

  • Manual
  • Script (needs to be done)

Pods (k8s style)

  • Manual (needs to be done)
  • Script (needs to be done)