Compose, Break, Repeat https://lours.me/ Recent content on Compose, Break, Repeat Compose, Break, Repeat https://lours.me/profile.png https://lours.me/profile.png Hugo -- 0.154.2 en-us Wed, 17 Jun 2026 09:00:00 +0200 Docker Compose Tip #77: Volume subpath for mounting a sub-directory https://lours.me/posts/compose-tip-077-volume-subpath/ Wed, 17 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-077-volume-subpath/ Use volume.subpath to mount a sub-directory of a named volume into a container, instead of the whole volume root. Docker Compose Tip #76: docker compose down and its options https://lours.me/posts/compose-tip-076-compose-down-options/ Mon, 15 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-076-compose-down-options/ What docker compose down actually removes, and the flags that decide whether you keep your data, your images, and your sibling services. Docker Compose Tip #75: Silencing noisy services with attach: false https://lours.me/posts/compose-tip-075-attach-false/ Fri, 12 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-075-attach-false/ Hide noisy service logs from docker compose up without losing access to them, using attach in the Compose file or attach flags on the CLI. Docker Compose Tip #74: docker compose ls and cross-project visibility https://lours.me/posts/compose-tip-074-compose-ls/ Wed, 10 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-074-compose-ls/ Inspect every Compose stack running on the host with docker compose ls, filter by name, and script around the output with json + jq. Docker Compose Tip #73: expose vs ports — what actually gets published https://lours.me/posts/compose-tip-073-expose-vs-ports/ Mon, 08 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-073-expose-vs-ports/ Understand the difference between expose and ports in Compose: one documents intent, the other actually publishes a port to the host. Compose Bridge Deep Dive #72 — Part 3: Generating a Docker Model Runner app for Kubernetes https://lours.me/posts/compose-bridge-deep-dive-072-model-runner/ Fri, 05 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-bridge-deep-dive-072-model-runner/ Deploy a Compose file that declares LLMs to Kubernetes — either with the Docker Desktop host Model Runner or as a standalone in-cluster service — using Compose Bridge. Compose Bridge Deep Dive #71 — Part 2: Custom transformers and x-* extensions https://lours.me/posts/compose-bridge-deep-dive-071-custom-transformers/ Wed, 03 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-bridge-deep-dive-071-custom-transformers/ Bootstrap a custom Compose Bridge transformer, fold organisation-specific rules into the templates, and use x-* extension fields to drive the output. Compose Bridge Deep Dive #70 — Part 1: From Compose to Kubernetes https://lours.me/posts/compose-bridge-deep-dive-070-introduction/ Mon, 01 Jun 2026 09:00:00 +0200 https://lours.me/posts/compose-bridge-deep-dive-070-introduction/ What Compose Bridge is, how its transformer images work, and how to generate Kubernetes manifests directly from a Compose file. Docker Compose Tip #69: Sharing namespaces with pid and ipc https://lours.me/posts/compose-tip-069-pid-ipc/ Fri, 29 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-069-pid-ipc/ Share process and IPC namespaces between containers for debugging, profiling, and shared memory workloads Docker Compose Tip #68: Waiting for service exit with docker compose wait https://lours.me/posts/compose-tip-068-compose-wait/ Wed, 27 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-068-compose-wait/ Block until a service exits and propagate its exit code, perfect for migration containers and CI jobs Docker Compose Tip #67: Controlling image pulls with pull_policy https://lours.me/posts/compose-tip-067-pull-policy/ Mon, 25 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-067-pull-policy/ Decide when Compose should pull images from a registry with the pull_policy directive Docker Compose Tip #66: Volume drivers with NFS https://lours.me/posts/compose-tip-066-volume-drivers-nfs/ Fri, 22 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-066-volume-drivers-nfs/ Mount NFS shares as Compose volumes for shared storage across hosts using the built-in local driver Docker Compose Tip #65: Custom DNS configuration with dns and dns_search https://lours.me/posts/compose-tip-065-dns-config/ Wed, 20 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-065-dns-config/ Control which DNS servers a container uses, configure search domains, and tune the resolver Docker Compose Tip #64: Copying files with docker compose cp https://lours.me/posts/compose-tip-064-compose-cp/ Mon, 18 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-064-compose-cp/ Copy files in and out of containers without bind mounts or volumes using docker compose cp Docker Compose Tip #63: Tuning containers with ulimits and shm_size https://lours.me/posts/compose-tip-063-ulimits-shm-size/ Fri, 15 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-063-ulimits-shm-size/ Adjust kernel resource limits and shared memory size for containers that need more than the defaults Docker Compose Tip #62: Network aliases for service routing https://lours.me/posts/compose-tip-062-network-aliases/ Wed, 13 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-062-network-aliases/ Give a service multiple hostnames on a network with aliases, useful for migrations and legacy hostnames Docker Compose Tip #61: Provider services for non-container dependencies https://lours.me/posts/compose-tip-061-provider-services/ Mon, 11 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-061-provider-services/ Manage external dependencies like Kubernetes intercepts, managed databases, and VPN tunnels declaratively with the provider directive Docker Compose Tip #60: Declaring LLMs with the models section https://lours.me/posts/compose-tip-060-models-section/ Fri, 08 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-060-models-section/ Declare and connect LLMs to your services using the new Compose models top-level key Docker Compose Tip #59: entrypoint vs command https://lours.me/posts/compose-tip-059-entrypoint-vs-command/ Wed, 06 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-059-entrypoint-vs-command/ Understand the subtle but important difference between entrypoint and command, and when to use each Docker Compose Tip #58: Using configs for config files https://lours.me/posts/compose-tip-058-configs/ Mon, 04 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-058-configs/ Mount config files into containers declaratively with the configs top-level key, no volumes required Docker Compose Tip #57: Container resource monitoring https://lours.me/posts/compose-tip-057-resource-monitoring/ Fri, 01 May 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-057-resource-monitoring/ Monitor CPU, memory, and processes in your Compose stack with docker compose top and docker compose stats Docker Compose Tip #56: env_file advanced patterns https://lours.me/posts/compose-tip-056-env-file-advanced/ Wed, 29 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-056-env-file-advanced/ Go beyond a single .env file, multiple files, optional loading, formats, and precedence rules Docker Compose Tip #55: docker compose config advanced usage https://lours.me/posts/compose-tip-055-config-advanced/ Mon, 27 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-055-config-advanced/ Go beyond validation with docker compose config, list services, hash, resolve digests, and filter output See you at Devoxx France 2026! https://lours.me/posts/devoxx-france-2026/ Mon, 20 Apr 2026 09:00:00 +0200 https://lours.me/posts/devoxx-france-2026/ I'll be giving three talks at Devoxx France 2026 covering Docker Sandboxes, Compose for AI, and a tiny LLM powered RPG Docker Compose Tip #54: Preview changes with --dry-run https://lours.me/posts/compose-tip-054-dry-run/ Fri, 17 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-054-dry-run/ Use --dry-run to see what Compose will do before it actually does it Docker Compose Tip #53: Compose project name and working directory https://lours.me/posts/compose-tip-053-project-name-workdir/ Wed, 15 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-053-project-name-workdir/ Control project naming and working directory to avoid conflicts and organize multi-environment setups Docker Compose Tip #52: Setting up a CI test environment https://lours.me/posts/compose-tip-052-ci-test-environment/ Mon, 13 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-052-ci-test-environment/ Use Compose override files to create a dedicated CI environment with seeded database and automated tests Docker Compose Tip #51: docker compose up --wait for scripting and CI https://lours.me/posts/compose-tip-051-up-wait/ Fri, 10 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-051-up-wait/ Wait for all services to be healthy before proceeding, perfect for CI pipelines and scripts Docker Compose Tip #50: GPU support with deploy.resources https://lours.me/posts/compose-tip-050-gpu-support/ Wed, 08 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-050-gpu-support/ Reserve and use GPU devices in your Compose services for ML, AI, and compute workloads Docker Compose Tip #49: Mixed platforms with Linux containers and Wasm https://lours.me/posts/compose-tip-049-mixed-platforms-wasm/ Mon, 06 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-049-mixed-platforms-wasm/ Run Linux containers and WebAssembly modules side by side in the same Compose stack Docker Compose Tip #48: Network debugging with docker compose port https://lours.me/posts/compose-tip-048-network-debugging-port/ Fri, 03 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-048-network-debugging-port/ Find out which host port maps to a container port with docker compose port Docker Compose Tip #47: Sidecar container patterns https://lours.me/posts/compose-tip-047-sidecar-patterns/ Wed, 01 Apr 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-047-sidecar-patterns/ Use sidecar containers to add capabilities without modifying your main application Docker Compose Tip #46: Build args vs environment variables https://lours.me/posts/compose-tip-046-build-args-vs-env/ Mon, 30 Mar 2026 09:00:00 +0200 https://lours.me/posts/compose-tip-046-build-args-vs-env/ Understand the difference between build-time args and runtime environment variables Docker Compose Tip #45: Multi-stage builds with target https://lours.me/posts/compose-tip-045-multi-stage-target/ Fri, 27 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-045-multi-stage-target/ Use the target option to build specific stages from multi-stage Dockerfiles Docker Compose Tip #44: Signal handling in containers https://lours.me/posts/compose-tip-044-signal-handling/ Wed, 25 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-044-signal-handling/ Control how your containers receive and handle stop signals for graceful shutdowns Docker Compose Tip #43: Read-only root filesystems https://lours.me/posts/compose-tip-043-read-only-rootfs/ Mon, 23 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-043-read-only-rootfs/ Harden your containers by making the root filesystem read-only Docker Compose Tip #42: Variable substitution and defaults https://lours.me/posts/compose-tip-042-variable-substitution/ Fri, 20 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-042-variable-substitution/ Use variable substitution with defaults, required values, and error messages in Compose files Docker Compose Tip #41: Container lifecycle hooks https://lours.me/posts/compose-tip-041-lifecycle-hooks/ Wed, 18 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-041-lifecycle-hooks/ Run commands at specific points in a container's lifecycle with post_start and pre_stop hooks Docker Compose Tip #40: Using labels for service organization and monitoring https://lours.me/posts/compose-tip-040-labels/ Mon, 16 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-040-labels/ Organize, filter, and integrate services with labels Docker Compose Tip #39: Combining include, extends, and overrides https://lours.me/posts/compose-tip-039-combining-include-extends-overrides/ Fri, 13 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-039-combining-include-extends-overrides/ Use include, extends, and override files together for a clean and flexible multi-environment setup Docker Compose Tip #38: When to use include vs extends vs overrides https://lours.me/posts/compose-tip-038-when-to-use-which/ Wed, 11 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-038-when-to-use-which/ A practical guide to choosing the right Compose configuration mechanism for each situation Docker Compose Tip #37: Understanding include, extends, and override files https://lours.me/posts/compose-tip-037-include-extends-overrides/ Mon, 09 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-037-include-extends-overrides/ Three different mechanisms to split and reuse Compose configurations, each working very differently Docker Compose Tip #36: Using extra_hosts for custom DNS entries https://lours.me/posts/compose-tip-036-extra-hosts/ Fri, 06 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-036-extra-hosts/ Add custom hostname mappings without modifying system hosts file Docker Compose Tip #35: Using tmpfs for ephemeral storage https://lours.me/posts/compose-tip-035-tmpfs-storage/ Wed, 04 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-035-tmpfs-storage/ Boost performance with in-memory tmpfs mounts for temporary data Docker Compose Tip #34: Debugging with exec vs run https://lours.me/posts/compose-tip-034-exec-vs-run/ Mon, 02 Mar 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-034-exec-vs-run/ Understanding when to use docker compose exec vs run for debugging Docker Compose Tip #33: Using logging drivers and options https://lours.me/posts/compose-tip-033-logging-drivers/ Fri, 27 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-033-logging-drivers/ Configure logging drivers for better log management and analysis Docker Compose Tip #32: Build contexts and dockerignore patterns https://lours.me/posts/compose-tip-032-build-context-dockerignore/ Wed, 25 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-032-build-context-dockerignore/ Optimize build performance with proper context management and .dockerignore patterns Docker Compose Tip #31: Network isolation between services https://lours.me/posts/compose-tip-031-network-isolation/ Mon, 23 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-031-network-isolation/ Isolate services with custom networks for enhanced security Docker Compose Tip #30: Compose include for modular configurations https://lours.me/posts/compose-tip-030-include/ Fri, 13 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-030-include/ Build modular, reusable Compose configurations with the include directive Docker Compose Tip #29: Container capabilities and security options https://lours.me/posts/compose-tip-029-container-capabilities/ Thu, 12 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-029-container-capabilities/ Fine-tune container security with Linux capabilities and security options Docker Compose Tip #28: Converting docker run commands to Compose https://lours.me/posts/compose-tip-028-docker-run-to-compose/ Wed, 11 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-028-docker-run-to-compose/ Transform complex docker run commands into clean Compose configurations Docker Compose Tip #27: Extension fields as metadata for tools and platforms https://lours.me/posts/compose-tip-027-extension-metadata/ Tue, 10 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-027-extension-metadata/ Use extension fields to store metadata for tools, platforms, and deployment environments Docker Compose Tip #26: Using restart policies effectively https://lours.me/posts/compose-tip-026-restart-policies/ Mon, 09 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-026-restart-policies/ Configure automatic container restarts for resilient applications Docker Compose Tip #25: Using docker compose events for monitoring https://lours.me/posts/compose-tip-025-events/ Fri, 06 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-025-events/ Monitor container lifecycle and build automation with docker compose events Docker Compose Tip #24: Using profiles to organize optional services https://lours.me/posts/compose-tip-024-profiles/ Thu, 05 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-024-profiles/ Control which services start with profiles for dev, test, and production scenarios Docker Compose Tip #23: Multi-platform builds with platforms https://lours.me/posts/compose-tip-023-multi-platform/ Wed, 04 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-023-multi-platform/ Build Docker images for multiple CPU architectures with one command Docker Compose Tip #22: Using secrets in Compose files https://lours.me/posts/compose-tip-022-secrets/ Tue, 03 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-022-secrets/ How to securely manage passwords and API keys in Docker Compose Docker Compose Tip #21: Understanding bridge vs host networking modes https://lours.me/posts/compose-tip-021-bridge-vs-host/ Mon, 02 Feb 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-021-bridge-vs-host/ When to use bridge vs host networking modes and their security implications Docker Compose Tip #20: Using docker compose logs effectively https://lours.me/posts/compose-tip-020-docker-compose-logs/ Fri, 30 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-020-docker-compose-logs/ Master docker compose logs to debug issues quickly and monitor your applications Docker Compose Tip #19: Override files for local development https://lours.me/posts/compose-tip-019-override-files/ Thu, 29 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-019-override-files/ How to use compose.override.yml for seamless local development configurations Docker Compose Tip #18: Graceful shutdown with stop_grace_period https://lours.me/posts/compose-tip-018-graceful-shutdown/ Wed, 28 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-018-graceful-shutdown/ How to configure graceful shutdown timeouts for containers in Docker Compose Docker Compose Tip #17: YAML anchors to reduce duplication https://lours.me/posts/compose-tip-017-yaml-anchors/ Tue, 27 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-017-yaml-anchors/ How to use YAML anchors and aliases to eliminate duplication in Compose files Docker Compose Tip #16: Setting resource limits with deploy.resources https://lours.me/posts/compose-tip-016-resource-limits/ Mon, 26 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-016-resource-limits/ How to set CPU and memory limits for containers in Docker Compose Docker Compose Tip #15: Blue-green deployments with Traefik https://lours.me/posts/compose-tip-015-blue-green-deployments/ Fri, 23 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-015-blue-green-deployments/ How to implement zero-downtime blue-green deployments with Docker Compose and Traefik Docker Compose Tip #14: Running containers as non-root users https://lours.me/posts/compose-tip-014-non-root-users/ Thu, 22 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-014-non-root-users/ How to run containers with non-root users for improved security Docker Compose Tip #13: Using external networks to connect multiple projects https://lours.me/posts/compose-tip-013-external-networks/ Wed, 21 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-013-external-networks/ How to connect containers from different Compose projects using external networks Docker Compose Tip #12: Using target to specify build stages https://lours.me/posts/compose-tip-012-target-build-stages/ Tue, 20 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-012-target-build-stages/ How to use target to build specific stages from multi-stage Dockerfiles Docker Compose Tip #11: Mastering docker compose up --watch for hot reload https://lours.me/posts/compose-tip-011-docker-compose-watch/ Mon, 19 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-011-docker-compose-watch/ How to use docker compose watch for automatic hot reloading during development Docker Compose Tip #10: Using init for proper PID 1 handling https://lours.me/posts/compose-tip-010-init-pid1/ Fri, 16 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-010-init-pid1/ Why and how to use init in Docker Compose for proper signal handling and zombie reaping Docker Compose Tip #9: Publishing Compose applications as OCI artifacts https://lours.me/posts/compose-tip-009-oci-artifacts/ Thu, 15 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-009-oci-artifacts/ How to publish and share Docker Compose applications as OCI artifacts Docker Compose Tip #8: Healthchecks with Docker Hardened Images https://lours.me/posts/compose-tip-008-dhi-healthcheck/ Wed, 14 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-008-dhi-healthcheck/ How to add healthchecks using sidecar pattern with Docker Hardened Images Docker Compose Tip #7: Restarting single services without stopping the stack https://lours.me/posts/compose-tip-007-restart-single/ Tue, 13 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-007-restart-single/ How to restart individual services in Docker Compose without bringing down your entire stack Docker Compose Tip #6: Service discovery and internal DNS https://lours.me/posts/compose-tip-006-service-discovery/ Mon, 12 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-006-service-discovery/ How Docker Compose handles service discovery between containers Docker Compose Tip #5: Writing Compose files for AI tools https://lours.me/posts/compose-tip-005-ai-documentation/ Fri, 09 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-005-ai-documentation/ How to structure Compose files so AI tools understand them better Docker Compose Tip #4: Using SSH keys during build https://lours.me/posts/compose-tip-004-ssh-build/ Thu, 08 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-004-ssh-build/ How to securely use SSH keys in Docker builds for private repositories Docker Compose Tip #3: Service dependencies with health checks https://lours.me/posts/compose-tip-003-depends-on-healthcheck/ Wed, 07 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-003-depends-on-healthcheck/ How to make services wait for dependencies to be actually ready Docker Compose Tip #2: Using --env-file for different environments https://lours.me/posts/compose-tip-002-env-files/ Tue, 06 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-002-env-files/ How to manage dev, staging, and production configurations with env files Docker Compose Tip #1: Debug your configuration with config https://lours.me/posts/compose-tip-001-validate-config/ Mon, 05 Jan 2026 09:00:00 +0100 https://lours.me/posts/compose-tip-001-validate-config/ How docker compose config helps debug complex configurations and profiles