Containerization has transformed how new applications are developed and deployed. However many organizations retain a back catalog of older systems that necessitate a different approach. This disconnect between new and old do…
Docker is a technology for packaging components of your stack as isolated containers. It’s common practice to run each of your processes in its own container, creating a clean divide between components. This enhances modulari…
Docker’s “build args” mechanism lets you define environment variables that can be referenced in your Dockerfile during image builds. Unlike regular ENV instructions, build args are not present inside the final output image. T…
Docker Engine exposes a REST API which you can use to control your containers without the docker CLI. The API exposes equivalent functionality using HTTP network calls. You can script common Docker operations using your favor…
GitLab is a leading platform for hosting Git repositories, CI pipelines, and DevOps workflows. It’s available as a SaaS offering on GitLab.com or as a self-managed distribution for private use on your own hardware….
Grafana is a leading observability platform for metrics visualization. It lets you build bespoke dashboards to surface meaningful insights from your application’s real-time data streams.
Docker is a popular platform for packaging apps as self-contained distributable artifacts. It creates images that include everything you need to run a particular software, such as its source code, third-party package dependen…
Docker is a containerization platform that simplifies the packaging and execution of applications. Containers run as isolated processes with their own filesystem but share their host’s kernel. Docker has risen to prominence a…
Caddy is a popular modern web server engineered for high performance and memory safety. It’s written in Go, runs with no dependencies, features built-in support for static site rendering with Markdown, and offers automatic HT…
DigitalOcean’s Container Registry gives you a private space in the cloud to store and distribute your Docker images. As well as offering an image repository, the service also integrates into DigitalOcean’s other services. You…
Docker uses tags to identify distinct versions of an image. In common with the broader container community, tags should be used to mark each release so users can select between different versions.
PostgreSQL, also referred to as Postgres, is the leading object-relational database system. It’s popular because of its high level of compliance with the SQL standard and inclusion of additional features that simplify working…
Docker is a popular development tool as it simplifies starting isolated instances of your application with a reproducible configuration. It can also be used in production where it ensures live deployments are identical to you…
Docker containers are generally ephemeral application instances which lack internal state. That’s the best practice way to handle them that lets you stop or restart your containers at any time.
Docker’s Moby Project disassembles the foundational components of Docker Engine into a modular toolkit that other container-based systems can reuse. Moby was spun out of the then-monolithic Docker codebase in 2017. It’s devel…
Docker’s undoubtedly one of the most impactful developer technologies of the last decade. Containers have provided a solution for isolating applications, scaling them across physical machines, and abstracting the differences …
Dockerfiles define the content of Docker images as a set of instructions in a text file. The Dockerfile syntax is generally straightforward but there are some gotchas to avoid. Adhering to best practices while writing complex…
Traefik is a leading reverse proxy and load balancer for cloud-native operations and containerized workloads. It functions as an edge router that publishes your services to the internet.
One common use case for CI pipelines is building the Docker images you’ll use to deploy your application. GitLab CI is a great choice for this as it supports an integrated pull proxy service, meaning faster pipelines, and a b…
Docker containers are usually treated as immutable once they’ve started running. You can update some configuration parameters dynamically though, such as the container’s name and its hardware resource limits….
Docker’s API is completely unprotected by default except for filesystem permissions on its Unix socket. You should set up TLS when exposing the Docker API over TCP so Docker Engine and your clients can verify each others’ ide…
Docker containers are intentionally isolated environments. Each container has its own filesystem which can’t be directly accessed by other containers or your host.
Grype is an open-source vulnerability scanner that finds weaknesses within container images and filesystem directories. Grype is developed by Anchore but works as a standalone binary that’s easier to get to grips with than th…
Docker is the best known containerization platform but it doesn’t exist in isolation. An entire ecosystem of complementary tools and spin-off projects has sprung up around the shift to containers.
Redis is an in-memory key-value store which can save abstract data structures with high performance. The open-source software is typically used for database, messaging, and caching functions.
