- Learn OpenShift
- Denis Zuev Artemii Kropachev Aleksey Usov
- 138字
- 2021-08-13 16:03:42
Container image layers
As previously mentioned, a Docker image contains a number of layers that are combined into a single filesystem using a storage driver. The layers (also called intermediate images) are generated when commands are executed during the Docker image build process. Usually, Docker images are created using a Dockerfile, the syntax of which will be described later. Each layer represents an instruction in the image's Dockerfile.
Each layer, except the very last one, is read-only:
A Docker image usually consists of several layers, stacked one on top of the other. The top layer has read-write permissions, and all the remaining layers have read-only permissions. This concept is very similar to the copy-on-write technology. So, when you run a container from the image, all the changes are done to this top writable layer.
- Modern Web Testing with TestCafe
- 每天5分鐘玩轉(zhuǎn)Kubernetes
- Cybersecurity:Attack and Defense Strategies
- VMware Horizon View 6 Desktop Virtualization Cookbook
- Extending Puppet
- 高性能Linux服務(wù)器構(gòu)建實戰(zhàn):運維監(jiān)控、性能調(diào)優(yōu)與集群應(yīng)用
- 混沌工程:復(fù)雜系統(tǒng)韌性實現(xiàn)之道
- Windows Server 2012網(wǎng)絡(luò)操作系統(tǒng)企業(yè)應(yīng)用案例詳解
- AWS Development Essentials
- Django Project Blueprints
- Windows Vista終極技巧金典
- Web Penetration Testing with Kali Linux(Third Edition)
- Office 365 User Guide
- iOS Programming Cookbook
- Mastering AWS CloudFormation