Docker commit vs save, Find the latest recommended version of the Docker Compose file format for defining multi-container applications. Docker commit can save the current state of the container in the form of a Docker image. Dec 28, 2016 · When I make docker images, Is there any difference in making images by commit command and build command with docker file? I said difference in terms of image sizes and algorithm. In this tutorial, you will learn how to use docker commit to create an image based on a container. e. These commands are often used together to manage Docker images and containers, but their differences and nuances are frequently misunderstood. . Docker Container -- A running instance of that image. It seems it only saves the changes made to the persistent file changes. Lightweight, isolated, and disposable. Be sure to read the entire article for more advanced methods, background information, tips, and tricks. , their structure and contents cannot be altered after the build process finishes. Docker Compose -- Defines and runs multi-container applications locally. However, if you want to make adjustments to a Dockerized app, run a container from the image, make the changes inside the container, and commit them to a new Docker image. While they both have similar syntax and create tar files, they serve two distinct purposes. Aug 6, 2018 · The usual way is at least through a docker commit: that will freeze the state of your container into a new image. To achieve a similar effect without having to specify the -H flag for every command, you could also create a context, or alternatively, use the DOCKER_HOST environment variable. This lets you debug a container by running an interactive shell, or export a working dataset to another server. Jul 15, 2025 · The Docker Commit image is used to create a new image from the changes made to the Docker container. Mar 19, 2024 · In this tutorial, we’ve seen the differences between the Docker save and export commands. For example, docker commit <container_id> <new_image_name>. It can be useful to commit a container's file changes or settings into a new image. If you have persistent data, it is best to have it mounted on the host or some other storage location where the data can be protected outside the container. Backing up your containers usually involves backing up the container itself (the application) and the container data. Your app, a Postgres database, and a Redis cache -- all spun up with one command: Dec 16, 2025 · Docker images are immutable, i. This is a downside also to docker. It creates a new Docker image from a container’s changes. Feb 21, 2026 · Docker Image -- A portable, immutable snapshot of your app and its environment. The fo 上一章我们对 docker commit 进行了简单的剖析，相信大家对commit的使用场景有一定了解，今天再讲两个docker备份与恢复的常用命令。 那就是export和save。 一个是导出镜像、一个是保存镜像，执行后的结果都一样——得到一个tar文件包。 Nov 25, 2025 · In this article, we will delve into the world of Docker and explore the intricacies of three essential commands: docker save, docker export, and docker commit. Commits do not include any data contained in mounted volumes. Aug 16, 2023 · The docker commit command allows you to save changes made in a Docker container. But know that there is no reliable way to "save state" of container unlike virtual machine save state in Hyper-V or VMware. Even virtual machine backups will do if your container host is a VM.
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