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Guillaume

Guillaume

@lours.me

590 followers 390 following 150 posts

Staff Software engineer @docker
Tech lead of Compose Team

https://lours.me

Posts Replies Media Videos

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #20

Debug faster with smart logging!

docker compose logs -f --tail 50 api
docker compose logs --since 5m
docker compose logs | grep -i error

Master log commands: lours.me/posts/compose-tip-020-docker-compose-logs/

#Docker #Debugging #Logs

Docker Compose Tip #20: Using docker compose logs effectively

Master docker compose logs to debug issues quickly and monitor your applications

January 30, 2026 at 8:52 AM

Reposted by Guillaume

Léαlinux 🐧

@lea-linux.org

This !

$Multiple override files Chain multiple configurations: # Base + override + additional testing setup docker compose \ -f compose.yml \ -f compose.override.yml \ -f compose.test.yml \ up$

January 29, 2026 at 10:55 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #19

Seamless local development!

compose.yml + compose.override.yml = automatic merging

Production: docker compose -f compose.yml up
Dev: docker compose up (includes override)

Details: lours.me/posts/compose-tip-019-override-files/

#Docker #Development #DevEx

Docker Compose Tip #19: Override files for local development

How to use compose.override.yml for seamless local development configurations

January 29, 2026 at 8:50 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #18

Give containers time to clean up!

stop_grace_period: 2m
stop_signal: SIGTERM

Ensures databases close properly, transactions complete, and data saves.

Learn more: lours.me/posts/compose-tip-018-graceful-shutdown/

#Docker #Runtime #Reliability

Docker Compose Tip #18: Graceful shutdown with stop_grace_period

How to configure graceful shutdown timeouts for containers in Docker Compose

January 28, 2026 at 9:25 AM

Reposted by Guillaume

Auschwitz Memorial

@auschwitzmemorial.bsky.social

Auschwitz was at the end of a process. We must remember that it did not start from gas chambers.

This hatred gradually developed: from ideas, words, stereotypes & prejudice through legal exclusion, dehumanization & escalating violence... to systematic and industrial murder.

Auschwitz took time.

A bird's-eye view of a former Auschwitz II-Birkenau camp showing a wide dirt pathway flanked by parallel rows of barbed-wire fences. Groups of visitors walk along the path, surrounded by the remnants of brick structures and barracks, now reduced to foundations. Green grass contrasts with the somber history of the site, as the path leads toward a guard tower in the distance.

January 27, 2026 at 11:00 AM

Reposted by Guillaume

Le Gorafi

@legorafi.bsky.social

La police de l’immigration déboulonne la Statue de la Liberté et l’expulse vers la France https://www.legorafi.fr/2026/01/27/la-police-de-limmigration-deboulonne-la-statue-de-la-liberte-et-lexpulse-vers-la-france/

La police de l’immigration déboulonne la Statue de la Liberté et l’expulse vers la France

Toute l'information selon des sources contradictoires.

www.legorafi.fr

January 27, 2026 at 9:03 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #17

Stop copy-pasting! Use YAML anchors:

x-logging: &default-logging
logging:
driver: json-file
options:
max-size: "10m"

services:
web:
<<: *default-logging

DRY compose configs: lours.me/posts/compose-tip-017-yaml-anchors/

#Docker #Compose

Docker Compose Tip #17: YAML anchors to reduce duplication

How to use YAML anchors and aliases to eliminate duplication in Compose files

January 27, 2026 at 8:53 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #16

Prevent container resource exhaustion!

Set CPU and memory limits:
deploy:
resources:
limits:
cpus: '0.5'
memory: 512M

Monitor with: docker compose stats

Full guide: lours.me/posts/compose-tip-016-resource-limits/

#Docker #DockerCompose #Performance

Docker Compose Tip #16: Setting resource limits with deploy.resources

How to set CPU and memory limits for containers in Docker Compose

January 26, 2026 at 9:04 AM

Reposted by Guillaume

Sebastian Roché

@sebastianjroche.bsky.social

J’espère que tout le monde voit le lien direct avec la loi sur la présomption de légitime défense poussée par le ministre de l’intérieur en France

Libération @liberation.fr · 5d

Minneapolis : «Ils tuent en toute impunité». C'est la une de Libération lundi.

Le meurtre d’Alex Pretti, abattu samedi par des agents de la police aux frontières alors qu’il était immobilisé au sol, ravive la colère aux Etats-Unis. Récit de notre envoyé spécial sur la scène du meurtre.

January 25, 2026 at 10:03 PM

Reposted by Guillaume

Flef

@flefgraph.bsky.social

Si jamais vous voulez une timeline algo un peu intelligente, qui vous montre des trucs personnalisés pas basés uniquement sur vos follows :

bsky.app/profile/did:...

Screenshot de la description du feed :
"A personalized algorithmic feed based on your likes.

It finds people who liked the same posts as you, and shows you what else they've liked recently."

January 22, 2026 at 6:14 PM

Reposted by Guillaume

Camille Roux

@camilleroux.com

Le projet Ghostty (terminal open source) vient d’ajouter une AI Usage Policy sur son projet GitHub. ⬇️

"All AI usage in any form must be disclosed.
You must state the tool you used (e.g. Claude Code, Cursor, Amp) along with the extent that the work was AI-assisted."

github.com/ghostty-org...

Website policy document titled "AI Usage Policy" outlining strict rules for disclosing, verifying, and limiting AI assistance in contributions.

January 23, 2026 at 11:58 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #15

Zero-downtime deploys with Traefik 🚦
Switch traffic via env vars:
BLUE_ENABLED=false GREEN_ENABLED=true docker compose up -d

Blue/green & instant routing...
Guide 👉 lours.me/posts/compose-tip-015-blue-green-deployments/

#Docker #Traefik #devops

Docker Compose Tip #15: Blue-green deployments with Traefik

How to implement zero-downtime blue-green deployments with Docker Compose and Traefik

January 23, 2026 at 9:04 AM

Reposted by Guillaume

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #14

Stop running containers as root!

services:
app:
user: "1000:1000"

Simple change, huge security improvement. Defense in depth.

How to do it right: lours.me/posts/compose-tip-014-non-root-users/

#Docker #Security #DevSecOps

Docker Compose Tip #14: Running containers as non-root users

How to run containers with non-root users for improved security

January 22, 2026 at 8:29 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #14

Stop running containers as root!

services:
app:
user: "1000:1000"

Simple change, huge security improvement. Defense in depth.

How to do it right: lours.me/posts/compose-tip-014-non-root-users/

#Docker #Security #DevSecOps

Docker Compose Tip #14: Running containers as non-root users

How to run containers with non-root users for improved security

January 22, 2026 at 8:29 AM

Reposted by Guillaume

Aaron Rupar

@atrupar.com

Trump: "Sometimes you need a dictator."

January 21, 2026 at 6:00 PM

Reposted by Guillaume

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #13

Connect containers across different projects!

Create external networks to share databases, caches, or APIs between multiple Compose stacks.

Perfect for microservices architecture.

Learn how: lours.me/posts/compose-tip-013-external-networks/

#Docker #Microservices

Docker Compose Tip #13: Using external networks to connect multiple projects

How to connect containers from different Compose projects using external networks

January 21, 2026 at 8:26 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #13

Connect containers across different projects!

Create external networks to share databases, caches, or APIs between multiple Compose stacks.

Perfect for microservices architecture.

Learn how: lours.me/posts/compose-tip-013-external-networks/

#Docker #Microservices

Docker Compose Tip #13: Using external networks to connect multiple projects

How to connect containers from different Compose projects using external networks

January 21, 2026 at 8:26 AM

Reposted by Guillaume

Docker

@docker.com

Ship Happens - a new podcast from Docker!
Shipping at scale is messy- production scars, security theater, AI hype vs. reality. Host Per Krogslund turns that mess into real lessons from engineers who’ve been there.
Ep 1 drops next Tues, w/ guest Vasek Mlejnsky (E2B)
Subscribe: https://bit.ly/4qw8uz1

January 20, 2026 at 8:30 PM

Reposted by Guillaume

ehsavoie

@ehsavoie.bsky.social

We have released 1.0.0.Alpha1 of the a2a-java SDK, which updates to the (still in progress) 1.0 A2A protocol specification.
More details:
* quarkus.io/blog/a2a-jav...

* medium.com/@kabir_khan/...

January 20, 2026 at 10:55 AM

Reposted by Guillaume

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #12

One Dockerfile, multiple environment builds!

Use `target` to build specific stages:
• Dev stage: 450MB (with tools)
• Prod stage: 12MB (optimized)

That's 37x smaller! Same Dockerfile.

Details: lours.me/posts/compose-tip-012-target-build-stages/

#Docker #DockerCompose

January 20, 2026 at 8:19 AM

Reposted by Guillaume

Léαlinux 🐧

@lea-linux.org

Si vous voulez toujours des bons conseils Docker & Co, vous pouvez suivre @lours.me, des #pititips sympa au moins par semaine :

Guillaume @lours.me · 10d

🐳 🐙 Docker Compose Tip #12

One Dockerfile, multiple environment builds!

Use `target` to build specific stages:
• Dev stage: 450MB (with tools)
• Prod stage: 12MB (optimized)

That's 37x smaller! Same Dockerfile.

Details: lours.me/posts/compose-tip-012-target-build-stages/

#Docker #DockerCompose

January 20, 2026 at 8:30 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #12

One Dockerfile, multiple environment builds!

Use `target` to build specific stages:
• Dev stage: 450MB (with tools)
• Prod stage: 12MB (optimized)

That's 37x smaller! Same Dockerfile.

Details: lours.me/posts/compose-tip-012-target-build-stages/

#Docker #DockerCompose

January 20, 2026 at 8:19 AM

Reposted by Guillaume

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #11

Give you dev containers hot reload capabilities
docker compose up --watch

Auto-syncs code changes, rebuild on dep updates & reloads on config modifications.

Read more: lours.me/posts/compose-tip-011-docker-compose-watch/

#Docker #DockerCompose #DevTools

Docker Compose Tip #11: Mastering docker compose up --watch for hot reload

How to use docker compose watch for automatic hot reloading during development

January 19, 2026 at 8:53 AM

Guillaume

@lours.me

🐳 🐙 Docker Compose Tip #11

Give you dev containers hot reload capabilities
docker compose up --watch

Auto-syncs code changes, rebuild on dep updates & reloads on config modifications.

Read more: lours.me/posts/compose-tip-011-docker-compose-watch/

#Docker #DockerCompose #DevTools

Docker Compose Tip #11: Mastering docker compose up --watch for hot reload

How to use docker compose watch for automatic hot reloading during development

January 19, 2026 at 8:53 AM