Docker defines a standard to ship software.ĭocker images are the basis of containers. The concept is borrowed from shipping containers, which define a standard to ship goods globally. This minimizes the footprint of the image and enables sharedįor more about copy-on-write in the context of Docker, see Understand images,Ī container is a runtime instance of a docker image. Image under a writable layer, and built up with layers of differences from theīase image. Images are essentially layers of filesystems typically predicated on a base This speeds up container start times and performance. Multiple containers can share access to the same image, and makeĬontainer-specific changes on a writable layer which is deleted when Multiple copies of anĮntity share the same instance and each one makes only specific changes to its Technique and a union file system for both images andĬontainers to optimize resources and speed performance. Multi-container application in a single file, then spin yourĪpplication up in a single command which does everything that needs to Running complex applications with Docker. Docker relies on cgroups to control and isolate resource limits.Ī cluster is a group of machines that work together to run workloads and provide high availability. The resource usage (CPU, memory, disk I/O, network, etc.) of a collection The context is the set of files in the directory in which the image is built.Ĭgroups is a Linux kernel feature that limits, accounts for, and isolates The build uses a Dockerfile and a “context”. It is a copy-on-write filesystem.īuild is the process of building Docker images using a Dockerfile. It is created using a Dockerfile with the FROM scratch directive.ītrfs (B-tree file system) is a Linux filesystem that Docker arm64 architectureĪ base image has no parent image specified in its Dockerfile. AMD64 is AMD’s 64-bit extension of Intel’s x86 architecture, and is alsoĪRM64 is the 64-bit extension of the ARM CPU architecture.
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