# Docker Optimize Approaches ###### tags: `Infrastructure` ## Docker Squash ### To Squash existed docker image, the procedures are as follows: 1. Install docker-squash tool: ```sh= pip install docker-squash ``` 2. Run docker-squash command: ```sh= ~/.local/bin/docker-squash --tag <new_docker_image_tag> <target_docker_image_tag> ``` ### To squash a docker image built by Dockerfile, the procedures are as follows: 1. Change the Docker Daemon Settings: ```sh= vim /etc/docker/daemon.json ``` Add the following text in the json file: ``` "experimental": true ``` Restart docker after the setting change: ```sh= systemctl restart docker ``` 2. `--squash` in docker build: ```sh= docker build -t <docker_image_tag> --squash . ```