Containers Glossary

Browse 76 containers terms defined in plain English, from the cultural dictionary of computing.

76 Containers Terms

Alpine Linux
A lightweight Linux distribution known for small container images, musl, and a security-conscious minimal design.
Application Container
A container image or runtime unit that packages an application with its dependencies and executes it in an isolated environment. Application containers...
Base Image
The starting container image on top of which additional layers, dependencies, and application code are built. Base image choice affects size, security posture,...
Build Context
In Docker, the set of files and directories sent to the Docker daemon when building an image — defined by the path (or URL) argument to docker build — which...
Cloud Container
A containerized workload running in a cloud-managed environment, often on orchestration platforms or serverless container services. Cloud containers package...
Cloud Native Buildpacks
A specification and tooling ecosystem for turning source code into container images without requiring handwritten Dockerfiles.
CNI Security
Security concerns and controls related to container networking interfaces, especially in orchestrated environments such as Kubernetes. CNI security affects...
Collection
A generic group of values managed together through a container abstraction such as a list, set, map, queue, or dictionary. Collections are a foundational...
Container Build
The process of assembling a container image from a base image, dependencies, application artifacts, and build instructions. Container builds influence image...
Container Cluster
A cluster of machines or nodes configured to run and manage containerized workloads together. Container clusters are typically paired with orchestration...
Container Compose
A declarative way to define and run multi-container applications, commonly associated with Compose-style configuration files that specify services, networks,...
Container Config
The runtime settings, environment variables, mounts, ports, resource limits, and entrypoint details that define how a container runs. Container config is...
containerd
An industry-standard container runtime responsible for managing container lifecycle tasks such as image transfer and execution.
Container Daemon
A long-running background process that manages container lifecycle operations such as image pulls, creation, startup, networking, and cleanup. Container...
Container Engine
The runtime software responsible for creating, starting, stopping, and managing containers and their images. Container engines provide the low-level mechanics...
Container Escape
An exploit or misconfiguration that allows code running inside a container to break isolation boundaries and interact with the host or other containers more...
Container Escape Slang
Informal or joking language used when talking about breaking out of container boundaries, usually with a mix of security seriousness and dark humor. In...
Container Exec
The act of running a command inside an already running container, often for debugging, inspection, or one-off maintenance. Container exec is powerful but...
Container Health
The observed readiness and liveness state of a containerized workload, typically based on probes or checks that determine whether it is functioning correctly...
Container Image
A Container Image is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Container Init
The initialization process or small init system used as PID 1 in a container to handle signal forwarding, zombie reaping, and startup behavior correctly....
Container Layer
A filesystem layer in a container image created by a build step, stacked together with other layers to form the final image. Layer design affects build...
Container Lifecycle
The sequence of states a container goes through from image build and creation to startup, health checks, restarts, shutdown, and removal. Understanding...
Container Limit
A configured cap on resources such as CPU, memory, file descriptors, or process count that a container may use. Container limits protect neighboring workloads,...
Container Log
The log output emitted by a running container, typically collected from stdout, stderr, or log files and aggregated by the platform. Container logs are central...
Container Monitor
A monitoring tool or service that observes container health, resource use, restarts, and workload behavior across containerized environments. Container...
Container Network
A Container Network is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Container Orchestration
A Container Orchestration is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make...
Container Port
A network port exposed or listened to by a process running inside a container. Container ports are often mapped or routed differently at the platform level, so...
Container Probe
A health or readiness check run against a container to determine whether it is alive, ready to serve traffic, or successfully initialized. Container probes are...
Container Registry
A Container Registry is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Container Restart
The termination and subsequent re-launch of a container, whether triggered intentionally, by policy, or due to failure. Container restarts can recover...
Container Runtime
A Container Runtime is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Container Scanning
The inspection of container images or running containers for vulnerable packages, secrets, misconfigurations, or policy violations. Container scanning helps...
Container Security
The set of practices and controls used to protect container images, runtimes, registries, orchestration platforms, and workload boundaries. It spans build-time...
Container Shell
An interactive shell session opened inside a running container for inspection, debugging, or one-off commands. Container shells are useful in emergencies, but...
Container Volume
A storage mount attached to a container so data can persist beyond the container's writable layer or be shared with other containers and processes. Volumes are...
CRI-O
A Kubernetes-focused container runtime implementation designed around the Container Runtime Interface.
CSS Container Query
A CSS Container Query is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Cursed Image
A container image, VM image, or screenshot so wrong, messy, or unsettling that it becomes a team joke. In engineering slang, cursed images usually combine...
Dev Container
A Dev Container is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
DevContainer
A DevContainer is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code easier...
Docker
Docker is a platform for building, shipping, and running applications inside lightweight, isolated environments called containers. A container packages an...
Docker All the Things
A joking phrase for applying Docker or containerization to everything, sometimes wisely and sometimes with trend-driven excess. In engineering slang, it...
Docker Compose
A Docker Compose is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Dockerfile
A Dockerfile is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code easier...
Docker Image
A Docker Image is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code easier...
Dockerize
To package an application and its dependencies into a Docker container. 'Can you Dockerize the service by end of day?' has replaced 'can you write deployment...
Docker Network
A Docker Network is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Docker Registry
A Docker Registry is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Docker Security
The set of practices and controls used to secure container images, runtimes, registries, and hosts in Docker-based environments. It includes image provenance,...
Docker Swarm
A Docker Swarm is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code easier...
Docker Volume
A Docker Volume is a development concept used to shape how software is built, executed, or maintained in real systems. Developers rely on it to make code...
Falco
A runtime security tool for detecting suspicious system and container behavior based on rules and system events.
Fly.io
A platform for deploying full-stack applications and databases close to users worldwide using lightweight virtual machines (Firecracker microVMs). Unlike...
Image
In containerization, a lightweight, standalone, read-only template containing an application and all its dependencies, from which containers are instantiated....
Kubernetes
Kubernetes, often abbreviated as K8s, is an open-source container orchestration platform originally designed by Google and now maintained by the Cloud Native...
Kubernetes Security
Kubernetes Security is the protection of cluster components, workloads, identities, network policies, and supply-chain paths in Kubernetes. Security teams use...
LXC
Linux Containers, a set of userspace tools for running multiple isolated Linux systems on one host.
Moby
The open-source project providing core container technology components associated with Docker and related tooling. In container culture, Moby represents the...
Mount Point
A directory in a file system hierarchy at which a separate file system, disk partition, or volume is attached and made accessible — for example, mounting an...
Multi-Stage Build
A Dockerfile technique that uses multiple `FROM` statements to create intermediate build stages — compiling code and installing dev dependencies in early...
Open Container Initiative
The standards body that maintains widely used specifications for container images and runtimes.
Orchestration
Orchestration is the automated coordination, configuration, and management of multiple services, containers, or infrastructure components so they function as a...
Pod
The smallest deployable unit in Kubernetes — a group of one or more containers that share the same network namespace (IP address and ports), storage volumes,...
Podman
An open-source container engine designed as an alternative to Docker, often emphasizing daemonless operation and close integration with Linux container...
Portainer
A management interface for containers, Docker, and Kubernetes environments aimed at simplifying operations through a web UI.
Resource Limit
A cap imposed by the operating system, container runtime, or platform on how much of a given resource (CPU, memory, file descriptors, processes, network...
Runtime Security
The monitoring and protection of applications, containers, hosts, or serverless workloads during execution. Runtime security focuses on what is actually...
Shipping Container
A playful phrase that leans on the literal meaning of containers while talking about software shipping and Docker-style deployment. In engineering slang, it...
Skaffold
A developer workflow tool for building, deploying, and iterating on Kubernetes applications locally and remotely.
Swarm
Docker Swarm — Docker's native container orchestration tool, offering simpler setup than Kubernetes at the cost of fewer features. The 'we don't need...
Traefik
A reverse proxy and ingress controller known for dynamic configuration in container and Kubernetes environments.
Trivy
A security scanner for container images, filesystems, repositories, and related software artifacts.
Volume
A persistent storage unit managed by a container runtime (such as Docker or Kubernetes) that exists independently of any single container's lifecycle, allowing...
Volume Mount
The act of attaching a volume or host directory to a specific path inside a container, making external storage accessible to the containerized application as...

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