Container on Luiz Felipe F M Costa

podman + docker compose and daemon on Linux

Tue, 10 Jun 2025 17:11:05 +0000

I’m setting up my developer machine and this is a common situation I face working on some opensource projects. Podman itself already is a great replacement for all container needs I have but docker compose still is an important component. In this post, I want to go through the process to setup a Fedora machine using Podman with support for docker compose.

Requirements

Some new Linux distro. Even Debian Testing will have the necessary packages. Here, I’m using Fedora 42.

How to install Ollama + Open-WebUI on Fedora/RHEL using podman Quadlets

Wed, 28 May 2025 08:02:31 +0000

Ollama is a powerful tool for running large language models locally. This guide walks you through setting up Ollama on Fedora using Podman Quadlets, ensuring it runs as a systemd service with persistent storage and GPU support.

Requirements

Make sure you have full GPU support for podman containers:

# This must return something like
# > GPU 0: NVIDIA GeForce RTX 3070 (UUID: GPU-...)
podman run --rm --security-opt=label=disable \
 --device nvidia.com/gpu=all \
 ubi9 \
 nvidia-smi -L

Check podman GPU support

If you have a NVIDIA GPU and the command above didn’t work, check the following post to fix that:

How to install Syncthing on Fedora/RHEL using podman Quadlets

Wed, 28 May 2025 00:47:59 +0000

The Syncthing is the best Peer-to-Peer solution I’ve ever used. It is flexible, has clients for most platforms, decentralized, and open source. This guide will show you how to install it and use it for your Fedora. I’m lazy, so everything will be on top of podman.

Install podman

If you are familiar with docker, podman is similar but with a more secure approach out-of-the-box. Let’s install it:

sudo dnf install -y podman

Create the systemd service

Create the config dir:

How to securely share secrets with podman containers

Sat, 03 Jun 2023 08:30:04 +0000

Podman is a daemon-less, open-source, Linux native tool designed to make it easy to find, run, build, share, and deploy applications. It offers many data isolation options, and in this post, I wanna cover all the options I know to securely share data with a container.

How to be paranoid about security

Any security measurement should always be based on a multi-layer security system, assuming that any protection can be compromised and another one should exist to block a potential attack. For example, if you want to design a distributed system, you probably want to follow a Zero Trust architecture: