{"id":48425,"date":"2025-02-08T08:31:37","date_gmt":"2025-02-08T08:31:37","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=48425"},"modified":"2025-07-12T05:38:42","modified_gmt":"2025-07-12T05:38:42","slug":"docker-commit","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/docker-commit\/","title":{"rendered":"Docker commands Guide – docker commit with examples"},"content":{"rendered":"\n

Here\u2019s a complete tutorial<\/strong> on docker commit<\/code>, covering what it does<\/strong>, examples<\/strong>, and use cases<\/strong>.<\/p>\n\n\n\n

\n\n\n\n

What is docker commit<\/code>?<\/strong><\/h2>\n\n\n\n

docker commit<\/code> is a Docker command used to create a new image<\/strong> from an existing container\u2019s state<\/strong>. This allows you to save the current state of a container, including its file system and configuration, as a reusable image.<\/p>\n\n\n\n

Key Features:<\/strong><\/h3>\n\n\n\n
    \n
  • Creates a new Docker image<\/strong> from a modified or running container.<\/li>\n\n\n\n
  • Useful for snapshotting<\/strong> the container state.<\/li>\n\n\n\n
  • Allows for quick prototyping<\/strong> or manual image creation<\/strong> without a Dockerfile<\/code>.<\/li>\n\n\n\n
  • Supports adding custom metadata<\/strong> (author, message).<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    Basic Syntax<\/strong><\/h2>\n\n\n
    docker<\/span> commit<\/span> [OPTIONS]<\/span> CONTAINER<\/span> IMAGE<\/span>[:TAG]<\/span>\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
    Common Options:<\/strong><\/h3>\n\n\n\n
      \n
    • -a<\/code>, --author<\/code>: Set the image author.<\/li>\n\n\n\n
    • -m<\/code>, --message<\/code>: Add a commit message.<\/li>\n\n\n\n
    • -p<\/code>, --pause<\/code>: Pause the container during commit (default: true).<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      Examples of docker commit<\/code><\/strong><\/h2>\n\n\n\n
      1. Create an Image from a Running Container<\/strong><\/h3>\n\n\n
      docker<\/span> commit<\/span> my_container<\/span> my_new_image<\/span>:latest<\/span>\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
      This creates a new image named my_new_image:latest<\/code> from my_container<\/code>.<\/p>\n\n\n\n
      \n\n\n\n
      2. Add an Author and Message<\/strong><\/h3>\n\n\n
      docker commit -a \"John Doe\"<\/span> -m \"Updated with new configurations\"<\/span> my_container my_image:v1\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
      This sets John Doe<\/code> as the image author and adds a commit message.<\/p>\n\n\n\n
      \n\n\n\n
      3. Create an Image Without Pausing the Container<\/strong><\/h3>\n\n\n
      docker commit --pause=false<\/span> my_container my_image:latest\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
      This commits the container without pausing it, which is useful for real-time services.<\/p>\n\n\n\n
      \n\n\n\n
      4. Create an Image from a Stopped Container<\/strong><\/h3>\n\n\n
      docker commit stopped_container my_backup_image\n<\/code><\/span><\/pre>\n\n\n
      You can commit a stopped container to create a backup image.<\/p>\n\n\n\n
      \n\n\n\n
      5. Use the Container ID Instead of the Name<\/strong><\/h3>\n\n\n
      docker<\/span> commit<\/span> a1b2c3d4e5f6<\/span> my_custom_image<\/span>:dev<\/span>\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
      This commits the container with ID a1b2c3d4e5f6<\/code> to my_custom_image:dev<\/code>.<\/p>\n\n\n\n
      \n\n\n\n
      6. Automate Commit with a Script<\/strong><\/h3>\n\n\n
      #!\/bin\/bash<\/span>\ndocker commit -a \"DevOps Team\"<\/span> -m \"Nightly snapshot\"<\/span> my_app nightly_snapshot:$(date +%Y%m%d)\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
      This script creates a snapshot image with the current date as the tag.<\/p>\n\n\n\n
      \n\n\n\n
      7. Create a Base Image with Pre-Installed Dependencies<\/strong><\/h3>\n\n\n\n
      If you have a container with installed software or dependencies:<\/p>\n\n\n
      docker<\/span> commit<\/span> my_python_container<\/span> python_base<\/span>:latest<\/span>\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
      This saves the container state as a base image for future Python projects.<\/p>\n\n\n\n
      \n\n\n\n
      8. Export Configuration Changes<\/strong><\/h3>\n\n\n\n
      After changing configuration files inside a running container:<\/p>\n\n\n
      docker<\/span> commit<\/span> my_nginx_container<\/span> nginx_custom<\/span>:1.0<\/span>\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
      This creates an image with your customized NGINX configuration.<\/p>\n\n\n\n
      \n\n\n\n
      Use Cases for docker commit<\/code><\/strong><\/h2>\n\n\n\n
      1. Snapshotting and Backups<\/strong><\/h3>\n\n\n\n
        \n
      • Create images from containers to snapshot the current state<\/strong> for backup purposes.<\/li>\n\n\n\n
      • Example: Backup a database container with all its data.<\/li>\n<\/ul>\n\n\n\n
        2. Quick Prototyping and Manual Changes<\/strong><\/h3>\n\n\n\n
          \n
        • Save an image after manual configuration<\/strong> or software installation in a container.<\/li>\n\n\n\n
        • Example: Install a library in a running Python container, then commit it for future use.<\/li>\n<\/ul>\n\n\n\n
          3. Debugging and Hotfixes<\/strong><\/h3>\n\n\n\n
            \n
          • Modify a running container to apply a quick fix<\/strong> and commit it as a temporary image.<\/li>\n\n\n\n
          • Example: Fix a misconfiguration in a running NGINX container and save the new state.<\/li>\n<\/ul>\n\n\n\n
            4. Custom Base Images<\/strong><\/h3>\n\n\n\n
              \n
            • Create custom base images<\/strong> with pre-installed dependencies or configurations.<\/li>\n\n\n\n
            • Example: Build a Python base image with specific libraries installed.<\/li>\n<\/ul>\n\n\n\n
              5. Preserving Legacy Containers<\/strong><\/h3>\n\n\n\n
                \n
              • Preserve old containers by committing them as images for future use.<\/li>\n<\/ul>\n\n\n\n
                6. CI\/CD Snapshots<\/strong><\/h3>\n\n\n\n
                  \n
                • Use docker commit<\/code> to snapshot application state<\/strong> during continuous integration and testing.<\/li>\n<\/ul>\n\n\n\n
                  \n\n\n\n
                  List of Common docker commit<\/code> Commands<\/strong><\/h2>\n\n\n\n
                  Command<\/strong><\/th>Description<\/strong><\/th><\/tr><\/thead>
                  docker commit my_container my_image:latest<\/code><\/td>Create an image from a container<\/td><\/tr>
                  docker commit -a \"John Doe\" -m \"Update configs\"<\/code><\/td>Add author and commit message to the image<\/td><\/tr>
                  docker commit --pause=false my_container my_image<\/code><\/td>Commit without pausing the container<\/td><\/tr>
                  docker commit stopped_container my_backup<\/code><\/td>Create an image from a stopped container<\/td><\/tr>
                  docker commit a1b2c3d4e5f6 my_custom_image<\/code><\/td>Commit using container ID<\/td><\/tr>
                  docker commit my_app nightly_snapshot:20230207<\/code><\/td>Automate commit with a timestamp in the tag<\/td><\/tr>
                  docker commit my_nginx_container nginx_custom<\/code><\/td>Save a container with custom configurations<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                  \n\n\n\n
                  Best Practices for Using docker commit<\/code>:<\/strong><\/h2>\n\n\n\n
                    \n
                  1. Avoid using docker commit<\/code> in production<\/strong>\u2014prefer Dockerfiles for reproducibility and version control.<\/li>\n\n\n\n
                  2. Add descriptive tags and messages<\/strong> to track changes.<\/li>\n\n\n\n
                  3. Pause the container<\/strong> during commit for consistent snapshots (--pause=true<\/code>).<\/li>\n\n\n\n
                  4. Use docker commit<\/code> for debugging<\/strong> or quick experiments, then convert to a Dockerfile for long-term use.<\/li>\n\n\n\n
                  5. Combine with docker save<\/code><\/strong> to create portable images for backup or transfer.<\/li>\n<\/ol>\n\n\n\n
                    \n\n\n\n
                    Common Errors and Solutions<\/strong><\/h2>\n\n\n\n
                      \n
                    1. “No such container”<\/strong>
                      \u2192 Ensure the container exists and is running\/stopped. Use docker ps -a<\/code> to verify.<\/li>\n\n\n\n
                    2. “Image is too large”<\/strong>
                      \u2192 Remove unnecessary files or use a multi-stage build to reduce the image size.<\/li>\n\n\n\n
                    3. Changes not reflected in the new image<\/strong>
                      \u2192 Ensure you\u2019re modifying the correct container and committing it after the changes.<\/li>\n\n\n\n
                    4. “Permission denied”<\/strong>
                      \u2192 Run the command with elevated privileges (sudo<\/code>) or ensure your user has Docker permissions.<\/li>\n<\/ol>\n\n\n\n
                      \n\n\n\n
                      Combining docker commit<\/code> with Other Commands<\/strong><\/h2>\n\n\n\n
                      Backup and Transfer the Committed Image<\/strong><\/h3>\n\n\n
                      docker<\/span> commit<\/span> my_container<\/span> my_backup_image<\/span>\ndocker<\/span> save<\/span> my_backup_image<\/span> > my_backup_image<\/span>.tar<\/span>\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
                      Restore the Image on Another Machine<\/strong><\/h3>\n\n\n
                      docker<\/span> load<\/span> < my_backup_image<\/span>.tar<\/span>\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
                      \n\n\n\n
                      <\/p>\n","protected":false},"excerpt":{"rendered":"
                      Here\u2019s a complete tutorial on docker commit, covering what it does, examples, and use cases. What is docker commit? docker commit is a Docker command used to create a new… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[4862],"tags":[],"class_list":["post-48425","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/48425","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=48425"}],"version-history":[{"count":2,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/48425\/revisions"}],"predecessor-version":[{"id":48427,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/48425\/revisions\/48427"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=48425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=48425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=48425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}