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    README.md

    dive

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    A tool for exploring a docker image, layer contents, and discovering ways to shrink the size of your Docker/OCI image.

    Image

    To analyze a Docker image simply run dive with an image tag/id/digest:

    dive <your-image-tag>

    or if you want to build your image then jump straight into analyzing it:

    dive build -t <some-tag> .

    Building on Macbook (supporting only the Docker container engine)

    docker run --rm -it \
          -v /var/run/docker.sock:/var/run/docker.sock \
          -v  "$(pwd)":"$(pwd)" \
          -w "$(pwd)" \
          -v "$HOME/.dive.yaml":"$HOME/.dive.yaml" \
          wagoodman/dive:latest build -t <some-tag> .

    Additionally you can run this in your CI pipeline to ensure you're keeping wasted space to a minimum (this skips the UI):

    CI=true dive <your-image>

    Image

    This is beta quality! Feel free to submit an issue if you want a new feature or find a bug :)

    Basic Features

    Show Docker image contents broken down by layer

    As you select a layer on the left, you are shown the contents of that layer combined with all previous layers on the right. Also, you can fully explore the file tree with the arrow keys.

    Indicate what's changed in each layer

    Files that have changed, been modified, added, or removed are indicated in the file tree. This can be adjusted to show changes for a specific layer, or aggregated changes up to this layer.

    Estimate "image efficiency"

    The lower left pane shows basic layer info and an experimental metric that will guess how much wasted space your image contains. This might be from duplicating files across layers, moving files across layers, or not fully removing files. Both a percentage "score" and total wasted file space is provided.

    Quick build/analysis cycles

    You can build a Docker image and do an immediate analysis with one command: dive build -t some-tag .

    You only need to replace your docker build command with the same dive build command.

    CI Integration

    Analyze an image and get a pass/fail result based on the image efficiency and wasted space. Simply set CI=true in the environment when invoking any valid dive command.

    Multiple Image Sources and Container Engines Supported

    With the --source option, you can select where to fetch the container image from:

    dive <your-image> --source <source>

    or

    dive <source>://<your-image>

    With valid source options as such:

    • docker: Docker engine (the default option)
    • docker-archive: A Docker Tar Archive from disk
    • podman: Podman engine (linux only)

    Installation

    Ubuntu/Debian

    wget https://github.com/wagoodman/dive/releases/download/v0.9.2/dive_0.9.2_linux_amd64.deb
    sudo apt install ./dive_0.9.2_linux_amd64.deb

    RHEL/Centos

    curl -OL https://github.com/wagoodman/dive/releases/download/v0.9.2/dive_0.9.2_linux_amd64.rpm
    rpm -i dive_0.9.2_linux_amd64.rpm

    Arch Linux

    Available as dive in the Arch User Repository (AUR).

    yay -S dive

    The above example assumes yay as the tool for installing AUR packages.

    Mac

    If you use Homebrew:

    brew install dive

    If you use MacPorts:

    sudo port install dive

    Or download the latest Darwin build from the releases page.

    Windows

    Download the latest release.

    Go tools Requires Go version 1.10 or higher.

    go get github.com/wagoodman/dive

    Note: installing in this way you will not see a proper version when running dive -v.

    Docker

    docker pull wagoodman/dive

    or

    docker pull quay.io/wagoodman/dive

    When running you'll need to include the docker socket file:

    docker run --rm -it \
        -v /var/run/docker.sock:/var/run/docker.sock \
        wagoodman/dive:latest <dive arguments...>

    Docker for Windows (showing PowerShell compatible line breaks; collapse to a single line for Command Prompt compatibility)

    docker run --rm -it `
        -v /var/run/docker.sock:/var/run/docker.sock `
        wagoodman/dive:latest <dive arguments...>

    Note: depending on the version of docker you are running locally you may need to specify the docker API version as an environment variable:

       DOCKER_API_VERSION=1.37 dive ...

    or if you are running with a docker image:

    docker run --rm -it \
        -v /var/run/docker.sock:/var/run/docker.sock \
        -e DOCKER_API_VERSION=1.37 \
        wagoodman/dive:latest <dive arguments...>

    CI Integration

    When running dive with the environment variable CI=true then the dive UI will be bypassed and will instead analyze your docker image, giving it a pass/fail indication via return code. Currently there are three metrics supported via a .dive-ci file that you can put at the root of your repo:

    rules:
      # If the efficiency is measured below X%, mark as failed.
      # Expressed as a ratio between 0-1.
      lowestEfficiency: 0.95
    
      # If the amount of wasted space is at least X or larger than X, mark as failed.
      # Expressed in B, KB, MB, and GB.
      highestWastedBytes: 20MB
    
      # If the amount of wasted space makes up for X% or more of the image, mark as failed.
      # Note: the base image layer is NOT included in the total image size.
      # Expressed as a ratio between 0-1; fails if the threshold is met or crossed.
      highestUserWastedPercent: 0.20

    You can override the CI config path with the --ci-config option.

    KeyBindings

    Key Binding Description
    Ctrl + C Exit
    Tab Switch between the layer and filetree views
    Ctrl + F Filter files
    PageUp Scroll up a page
    PageDown Scroll down a page
    Ctrl + A Layer view: see aggregated image modifications
    Ctrl + L Layer view: see current layer modifications
    Space Filetree view: collapse/uncollapse a directory
    Ctrl + Space Filetree view: collapse/uncollapse all directories
    Ctrl + A Filetree view: show/hide added files
    Ctrl + R Filetree view: show/hide removed files
    Ctrl + M Filetree view: show/hide modified files
    Ctrl + U Filetree view: show/hide unmodified files
    Ctrl + B Filetree view: show/hide file attributes
    PageUp Filetree view: scroll up a page
    PageDown Filetree view: scroll down a page

    UI Configuration

    No configuration is necessary, however, you can create a config file and override values:

    # supported options are "docker" and "podman"
    container-engine: docker
    # continue with analysis even if there are errors parsing the image archive
    ignore-errors: false
    log:
      enabled: true
      path: ./dive.log
      level: info
    
    # Note: you can specify multiple bindings by separating values with a comma.
    # Note: UI hinting is derived from the first binding
    keybinding:
      # Global bindings
      quit: ctrl+c
      toggle-view: tab
      filter-files: ctrl+f, ctrl+slash
    
      # Layer view specific bindings
      compare-all: ctrl+a
      compare-layer: ctrl+l
    
      # File view specific bindings
      toggle-collapse-dir: space
      toggle-collapse-all-dir: ctrl+space
      toggle-added-files: ctrl+a
      toggle-removed-files: ctrl+r
      toggle-modified-files: ctrl+m
      toggle-unmodified-files: ctrl+u
      toggle-filetree-attributes: ctrl+b
      page-up: pgup
      page-down: pgdn
    
    diff:
      # You can change the default files shown in the filetree (right pane). All diff types are shown by default.
      hide:
        - added
        - removed
        - modified
        - unmodified
    
    filetree:
      # The default directory-collapse state
      collapse-dir: false
    
      # The percentage of screen width the filetree should take on the screen (must be >0 and <1)
      pane-width: 0.5
    
      # Show the file attributes next to the filetree
      show-attributes: true
    
    layer:
      # Enable showing all changes from this layer and every previous layer
      show-aggregated-changes: false
    

    dive will search for configs in the following locations:

    • $XDG_CONFIG_HOME/dive/*.yaml
    • $XDG_CONFIG_DIRS/dive/*.yaml
    • ~/.config/dive/*.yaml
    • ~/.dive.yaml

    项目简介

    🚀 Github 镜像仓库 🚀

    源项目地址

    https://github.com/wagoodman/dive

    发行版本 24

    v0.10.0

    全部发行版

    贡献者 40

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