A tool for exploring each layer in a docker image
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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.
To analyze a Docker image simply run dive with an image tag/id/digest:
bash dive <your-image-tag> </your-image-tag>
or if you want to build your image then jump straight into analyzing it:
bash dive build -t <some-tag> . </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> . </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> </your-image>
This is beta quality! Feel free to submit an issue if you want a new feature or find a bug :)
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
command with the same
Analyze and image and get a pass/fail result based on the image efficiency and wasted space. Simply set
in the environment when invoking any valid dive command.
Multiple Image Sources and Container Engines Supported
option, you can select where to fetch the container image from:
bash dive <your-image> --source <source> </source></your-image>
bash dive <source>://<your-image> </your-image></source>
options as such: -
: Docker engine (the default option) -
: A Docker Tar Archive from disk -
: Podman engine (linux only)
bash 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
bash 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
Available as dive in the Arch User Repository (AUR).
yay -S dive
The above example assumes [
](https://aur.archlinux.org/packages/yay/) as the tool for installing AUR packages.
brew install dive
or download the latest Darwin build from the releases page.
Download the latest release.
Go toolsRequires 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
bash docker pull wagoodman/dive
docker pull quay.io/wagoodman/dive
When running you'll need to include the docker socket file:
bash docker run --rm -it \ -v /var/run/docker.sock:/var/run/docker.sock \ wagoodman/dive:latest <dive arguments...> </dive>
Docker for Windows (showing PowerShell compatible line breaks; collapse to a single line for Command Prompt compatibility)
bash docker run --rm -it ` -v /var/run/docker.sock:/var/run/docker.sock ` wagoodman/dive:latest <dive arguments...> </dive>
Note: depending on the version of docker you are running locally you may need to specify the docker API version as an environment variable:
bash DOCKER\_API\_VERSION=1.37 dive ...
or if you are running with a docker image:
bash docker run --rm -it \ -v /var/run/docker.sock:/var/run/docker.sock \ -e DOCKER\_API\_VERSION=1.37 \ wagoodman/dive:latest <dive arguments...> </dive>
When running dive with the environment variable
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
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
You can override the CI config path with the
Key Binding | Description -------------------------------------------|---------------------------------------------------------Ctrl + C | ExitTab | Switch between the layer and filetree viewsCtrl + F | Filter filesPageUp | Scroll up a pagePageDown | Scroll down a pageCtrl + A | Layer view: see aggregated image modificationsCtrl + L | Layer view: see current layer modificationsSpace | Filetree view: collapse/uncollapse a directoryCtrl + Space | Filetree view: collapse/uncollapse all directoriesCtrl + A | Filetree view: show/hide added filesCtrl + R | Filetree view: show/hide removed filesCtrl + M | Filetree view: show/hide modified filesCtrl + U | Filetree view: show/hide unmodified filesCtrl + B | Filetree view: show/hide file attributesPageUp | Filetree view: scroll up a pagePageDown | Filetree view: scroll down a page
No configuration is necessary, however, you can create a config file and override values: ```yaml
ignore-errors: false log: enabled: true path: ./dive.log level: info
keybinding: # Global bindings quit: ctrl+c toggle-view: tab filter-files: ctrl+f, ctrl+slash
diff: # You can change the default files show 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
layer: # Enable showing all changes from this layer and ever 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`