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Guillaume

@lours.me

Staff Software engineer @docker Compose Maintainer Options are my own https://lours.me

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22.06.2023
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Latest posts by Guillaume @lours.me

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Russia targets Signal and WhatsApp accounts in cyber campaign | AIVD Russian state hackers are engaged in a large-scale global cyber campaign to gain access to Signal and WhatsApp accounts belonging to dignitaries, military personnel and civil servants. The Dutch intel...

From the Dutch intel service: Russia targets Signal and WhatsApp accounts in cyber campaign
english.aivd.nl/latest/news/...

09.03.2026 12:47 πŸ‘ 5 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0

Should be ok now πŸ˜…

09.03.2026 12:39 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

erff, no still issue 😬

09.03.2026 12:33 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Fixed, thanks a lot πŸ™

09.03.2026 12:30 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

🐳 πŸ™ Docker Compose Tip #37

3 ways to split Compose configs, each works differently!

Override files β†’ project-level merge
extends β†’ service-level inheritance
include β†’ isolated sub-project import

Guide: lours.me/posts/compose-tip-037-include-extends-overrides/

#Docker #Configuration #Compose

09.03.2026 09:00 πŸ‘ 6 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0

🐳 πŸ™ Docker Compose tip week starts tomorrow!

This week: a deep dive into managing multiple Compose files.

include, extends, override files β€” 3 mechanisms that look similar but work very differently.

3 tips, Mon/Wed/Fri. See you tomorrow!

#Docker #Compose #DockerCompose #DevOps

08.03.2026 11:06 πŸ‘ 6 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0
Docker Compose Tip #36: Using extra_hosts for custom DNS entries Add custom hostname mappings without modifying system hosts file

🐳 πŸ™ Docker Compose Tip #36

Custom DNS without touching /etc/hosts!

extra_hosts:
- "api.local:192.168.1.100"
- "host.docker:host-gateway"

Perfect for local development!

Learn: lours.me/posts/compose-tip-036-extra-hosts/

#Docker #Compose #Networking #DNS

06.03.2026 08:34 πŸ‘ 7 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0

Compose all the things πŸ€©πŸ˜‰

05.03.2026 18:41 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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We asked Docker Captains what they wish more developers knew.
The themes were clear:

- Docker is more than just containers
- Security belongs in the development workflow.
- Docker has new solutions for AI developers

What’s something you wish you had learned earlier in your dev journey?

05.03.2026 17:02 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1
Docker Compose Tip #35: Using tmpfs for ephemeral storage Boost performance with in-memory tmpfs mounts for temporary data

🐳 πŸ™ Docker Compose Tip #35

⚑ RAM-speed storage with tmpfs!

tmpfs:
- /tmp:size=100M
- /app/cache:size=500M

Fast, secure, self-cleaning!

Guide: lours.me/posts/compose-tip-035-tmpfs-storage/

#Docker #Compose #Performance #Storage

04.03.2026 09:22 πŸ‘ 7 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
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Still debugging Dockerfiles by rerunning builds & digging through logs?

Join Reynald Adolphe (Microsoft / VS Code) with Remy Suen & Jonathan Sternberg (Docker) for a VS Code Live session on debugging Dockerfiles directly in VS Code using Docker DX.

πŸ“… March 5 | 11am ET
πŸ”— https://bit.ly/47anmeF

03.03.2026 18:00 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
k33g.org

πŸ“ And to get you started, I wrote a step-by-step tutorial:

Fine-tune #Qwen2.5-0.5B into a Hawaiian pizza expert πŸπŸ• then use it with @docker.com Model Runner.

30 min on a MacBook Air M4. That's it.

k33g.org/20260301-Fin...

01.03.2026 14:36 πŸ‘ 3 πŸ” 2 πŸ’¬ 1 πŸ“Œ 1
Docker Compose Tip #34: Debugging with exec vs run Understanding when to use docker compose exec vs run for debugging

🐳 πŸ™ Docker Compose Tip #34

exec vs run - know the difference!

exec: existing container
run: new container

docker compose exec web bash # Debug running
docker compose run --rm test # One-off task

Details: lours.me/posts/compose-tip-034-exec-vs-run/

#Docker #Compose #Debugging #CLI

02.03.2026 09:01 πŸ‘ 5 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0

🫢

27.02.2026 13:26 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
27.02.2026 11:08 πŸ‘ 211 πŸ” 44 πŸ’¬ 22 πŸ“Œ 5
Docker Compose Tip #33: Using logging drivers and options Configure logging drivers for better log management and analysis

🐳 πŸ™ Docker Compose Tip #33

Control your logs!

logging:
driver: json-file
options:
max-size: "10m"
max-file: "3"

Different drivers for different needs!

Guide: lours.me/posts/compose-tip-033-logging-drivers/

#Docker #Compose #Logging #DevOps

27.02.2026 08:59 πŸ‘ 11 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Docker Compose Tip #32: Build contexts and dockerignore patterns Optimize build performance with proper context management and .dockerignore patterns

🐳 πŸ™ Docker Compose Tip #32

Speed up builds with proper .dockerignore!

# .dockerignore
node_modules
.git
*.log
dist

Smaller context = faster builds!

Guide: lours.me/posts/compose-tip-032-build-context-dockerignore/

#Docker #Compose #Performance #Build

25.02.2026 08:43 πŸ‘ 3 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
Docker Compose Tip #32: Build contexts and dockerignore patterns Optimize build performance with proper context management and .dockerignore patterns

🐳 πŸ™ Docker Compose Tip #32

Speed up builds with proper .dockerignore!

# .dockerignore
node_modules
.git
*.log
dist

Smaller context = faster builds!

Guide: lours.me/posts/compose-tip-032-build-context-dockerignore/

#Docker #Compose #Performance #Build

25.02.2026 08:43 πŸ‘ 3 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
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J’en vois encore 2 ou 3 qui n’ont pas bien compris.
On va donc encore une fois bien Γ©couter les conclusions de ceux dont c’est le TRAVAIL au quotidien d’étudier les mouvements contestataires.
Et c’est parfait

24.02.2026 09:25 πŸ‘ 1405 πŸ” 837 πŸ’¬ 30 πŸ“Œ 42

internal: true means the network has no external connectivity
It does not make it private to a single Compose project.
Another stack can still attach to it using external: true if it references the same Docker network.

I’ve updated the blog post for clarity, really appreciate the feedback!

24.02.2026 08:25 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Docker Compose Tip #31: Network isolation between services Isolate services with custom networks for enhanced security

🐳 πŸ™ Docker Compose Tip #31

Not every service needs to talk to every other service!

networks:
frontend:
backend:
database:
internal: true

Isolate by tier for better security.

Guide: lours.me/posts/compose-tip-031-network-isolation/

#Docker #Compose #Security #Networking

23.02.2026 09:56 πŸ‘ 12 πŸ” 8 πŸ’¬ 2 πŸ“Œ 0

Thank you πŸ™ 😊

23.02.2026 12:59 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Docker Compose Tip #31: Network isolation between services Isolate services with custom networks for enhanced security

🐳 πŸ™ Docker Compose Tip #31

Not every service needs to talk to every other service!

networks:
frontend:
backend:
database:
internal: true

Isolate by tier for better security.

Guide: lours.me/posts/compose-tip-031-network-isolation/

#Docker #Compose #Security #Networking

23.02.2026 09:56 πŸ‘ 12 πŸ” 8 πŸ’¬ 2 πŸ“Œ 0
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This one hits hard.

21.02.2026 22:59 πŸ‘ 35629 πŸ” 10540 πŸ’¬ 778 πŸ“Œ 592

BREAKING: The Supreme Court STRIKES DOWN Trump's "emergency" tariffs. The vote is 6–3. www.supremecourt.gov/opinions/25p...

20.02.2026 15:02 πŸ‘ 4311 πŸ” 1133 πŸ’¬ 126 πŸ“Œ 555
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L'un des avocats de la famille de Federico Aramburu dénonce les hommages à Quentin Deranque : « Ce bruit assourdissant, en comparaison du silence politique d'il y a quatre ans, est une monstruosité » Me Christophe Cariou-Martin, l'un des avocats de la famille du rugbyman Federico Aramburu, assassiné en 2022 par deux militants d'ultradroite, s'est ému ce vendredi des hommages au militant identitair...

L'un des avocats de la famille de Federico Aramburu dénonce les hommages à Quentin Deranque : « Ce bruit assourdissant, en comparaison du silence politique d'il y a quatre ans, est une monstruosité » www.lequipe.fr/Rugby/Actual...

20.02.2026 14:58 πŸ‘ 1693 πŸ” 1026 πŸ’¬ 17 πŸ“Œ 31

Mais si rappelle toi la rΓ¨gle 726bis l’alinΓ©a 3 🀣🀣

19.02.2026 18:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

*s’assoit et attends les rΓ©actions politiques*

19.02.2026 05:55 πŸ‘ 586 πŸ” 130 πŸ’¬ 25 πŸ“Œ 4
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Normalize laughing derisively in men's faces when they deserve it.

18.02.2026 19:00 πŸ‘ 26478 πŸ” 6434 πŸ’¬ 552 πŸ“Œ 1079
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#Rouen attention ce soir rassemblement de fafs locaux qui vont probablement dehambuler dans le centre rd ensuite. Soyez prudentΒ·eΒ·s

19.02.2026 16:59 πŸ‘ 3 πŸ” 9 πŸ’¬ 0 πŸ“Œ 1