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dockviz: Visualizing Docker Data

This command takes Docker image and container information and presents in different ways, to help you understand what's going on inside the system.

Quick Start

Install dockviz. Either:

Download the latest release.
Set up an alias to run it from the (5.8 MB) docker image:

# if docker client using local unix socket
alias dockviz="docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock nate/dockviz"

# if docker client using tcp
alias dockviz="docker run -it --rm -e DOCKER_HOST='tcp://127.0.0.1:2375' nate/dockviz"

Visualize images by running dockviz images -t, which has similar output to docker images -t.

Image can be visualized as Graphviz, or as a tree or short summary in the terminal. Only Graphviz output has been implemented for containers.
If you would like to visualize outside the container you will have to install Graphviz first.

apt-get update && apt-get install graphviz

brew update && brew install graphviz

Output Examples

Containers

Currently, containers are visualized with labelled lines for links. Containers that aren't running are greyed out.

# show all containers
$ dockviz containers -d | dot -Tpng -o containers.png

# only show running containers
$ dockviz containers -d -r | dot -Tpng -o containers.png

Images

Image info is visualized with lines indicating parent images:

$ dockviz images -d | dot -Tpng -o images.png

$ dockviz images -d -l | dot -Tpng -o images.png
OR
$ dockviz images --dot --only-labelled | dot -Tpng -o images.png

Or as a treemap:

$ dockviz images -d | patchwork -Tpng -o treemap.png
OR
$ dockviz images --dot | patchwork -Tpng -o treemap.png

Or in short form:

$ dockviz images -s
nate/mongodb: latest
redis: latest
ubuntu: 12.04, precise, 12.10, quantal, 13.04, raring

Or as a tree in the terminal:

$ dockviz images -t
└─511136ea3c5a Virtual Size: 0.0 B
  ├─f10ebce2c0e1 Virtual Size: 103.7 MB
  │ └─82cdea7ab5b5 Virtual Size: 103.9 MB
  │   └─5dbd9cb5a02f Virtual Size: 103.9 MB
  │     └─74fe38d11401 Virtual Size: 209.6 MB Tags: ubuntu:12.04, ubuntu:precise
  ├─ef519c9ee91a Virtual Size: 100.9 MB
  │ └─07302703becc Virtual Size: 101.2 MB
  │   └─cf8dc907452c Virtual Size: 101.2 MB
  │     └─a7cf8ae4e998 Virtual Size: 171.3 MB Tags: ubuntu:12.10, ubuntu:quantal
  │       │─e18d8001204e Virtual Size: 171.3 MB
  │       │ └─d0525208a46c Virtual Size: 171.3 MB
  │       │   └─59dac4bae93b Virtual Size: 242.5 MB
  │       │     └─89541b3b35f2 Virtual Size: 511.8 MB
  │       │       └─7dac4e98548e Virtual Size: 511.8 MB
  │       │         └─341d0cc3fac8 Virtual Size: 511.8 MB
  │       │           └─2f96171d2098 Virtual Size: 511.8 MB
  │       │             └─67b8b7262a67 Virtual Size: 513.7 MB
  │       │               └─0fe9a2bc50fe Virtual Size: 513.7 MB
  │       │                 └─8c32832f07ba Virtual Size: 513.7 MB
  │       │                   └─cc4e1358bc80 Virtual Size: 513.7 MB
  │       │                     └─5c0d04fba9df Virtual Size: 513.7 MB Tags: nate/mongodb:latest
  │       └─398d592f2009 Virtual Size: 242.2 MB
  │         └─0cd8e7f50270 Virtual Size: 243.6 MB
  │           └─594b6f8e6f92 Virtual Size: 243.6 MB
  │             └─f832a63e87a4 Virtual Size: 243.6 MB Tags: redis:latest
  └─02dae1c13f51 Virtual Size: 98.3 MB
    └─e7206bfc66aa Virtual Size: 98.5 MB
      └─cb12405ee8fa Virtual Size: 98.5 MB
        └─316b678ddf48 Virtual Size: 169.4 MB Tags: ubuntu:13.04, ubuntu:raring

Only showing labelled images:

$ dockviz images -t -l
└─511136ea3c5a Virtual Size: 0.0 B
  ├─f10ebce2c0e1 Virtual Size: 103.7 MB
  │ └─74fe38d11401 Virtual Size: 209.6 MB Tags: ubuntu:12.04, ubuntu:precise
  ├─ef519c9ee91a Virtual Size: 100.9 MB
  │ └─a7cf8ae4e998 Virtual Size: 171.3 MB Tags: ubuntu:12.10, ubuntu:quantal
  │   ├─5c0d04fba9df Virtual Size: 513.7 MB Tags: nate/mongodb:latest
  │   └─f832a63e87a4 Virtual Size: 243.6 MB Tags: redis:latest
  └─02dae1c13f51 Virtual Size: 98.3 MB
    └─316b678ddf48 Virtual Size: 169.4 MB Tags: ubuntu:13.04, ubuntu:raring

Showing incremental size rather than cumulative:

$ dockviz images -t -i
└─511136ea3c5a Virtual Size: 0.0 B
  ├─f10ebce2c0e1 Virtual Size: 103.7 MB
  │ └─82cdea7ab5b5 Virtual Size: 255.5 KB
  │   └─5dbd9cb5a02f Virtual Size: 1.9 KB
  │     └─74fe38d11401 Virtual Size: 105.7 MB Tags: ubuntu:12.04, ubuntu:precise
  ├─ef519c9ee91a Virtual Size: 100.9 MB
  │ └─07302703becc Virtual Size: 251.0 KB
  │   └─cf8dc907452c Virtual Size: 1.9 KB
  │     └─a7cf8ae4e998 Virtual Size: 70.1 MB Tags: ubuntu:12.10, ubuntu:quantal
  │       ├─e18d8001204e Virtual Size: 29.4 KB
  │       │ └─d0525208a46c Virtual Size: 71.0 B
  │       │   └─59dac4bae93b Virtual Size: 71.2 MB
  │       │     └─89541b3b35f2 Virtual Size: 269.3 MB
  │       │       └─7dac4e98548e Virtual Size: 0.0 B
  │       │         └─341d0cc3fac8 Virtual Size: 0.0 B
  │       │           └─2f96171d2098 Virtual Size: 0.0 B
  │       │             └─67b8b7262a67 Virtual Size: 1.9 MB
  │       │               └─0fe9a2bc50fe Virtual Size: 656.0 B
  │       │                 └─8c32832f07ba Virtual Size: 383.0 B
  │       │                   └─cc4e1358bc80 Virtual Size: 0.0 B
  │       │                     └─5c0d04fba9df Virtual Size: 0.0 B Tags: nate/mongodb:latest
  │       └─398d592f2009 Virtual Size: 70.9 MB
  │         └─0cd8e7f50270 Virtual Size: 1.4 MB
  │           └─594b6f8e6f92 Virtual Size: 0.0 B
  │             └─f832a63e87a4 Virtual Size: 0.0 B Tags: redis:latest
  └─02dae1c13f51 Virtual Size: 98.3 MB
    └─e7206bfc66aa Virtual Size: 190.0 KB
      └─cb12405ee8fa Virtual Size: 1.9 KB
        └─316b678ddf48 Virtual Size: 70.8 MB Tags: ubuntu:13.04, ubuntu:raring

Showing non-human numbers, for precision:

$ dockviz images -t -i -c
└─511136ea3c5a Size: 0
  ├─f10ebce2c0e1 Size: 103675325
  │ └─82cdea7ab5b5 Size: 255455
  │   └─5dbd9cb5a02f Size: 1919
  │     └─74fe38d11401 Size: 105667193 Tags: ubuntu:12.04, ubuntu:precise
  ├─ef519c9ee91a Size: 100930679
  │ └─07302703becc Size: 250998
  │   └─cf8dc907452c Size: 1919
  │     └─a7cf8ae4e998 Size: 70094270 Tags: ubuntu:12.10, ubuntu:quantal
  │       ├─e18d8001204e Size: 29352
  │       │ └─d0525208a46c Size: 71
  │       │   └─59dac4bae93b Size: 71150930
  │       │     └─89541b3b35f2 Size: 269335966
  │       │       └─7dac4e98548e Size: 0
  │       │         └─341d0cc3fac8 Size: 0
  │       │           └─2f96171d2098 Size: 0
  │       │             └─67b8b7262a67 Size: 1866379
  │       │               └─0fe9a2bc50fe Size: 656
  │       │                 └─8c32832f07ba Size: 383
  │       │                   └─cc4e1358bc80 Size: 0
  │       │                     └─5c0d04fba9df Size: 0 Tags: nate/mongodb:latest
  │       └─398d592f2009 Size: 70917743
  │         └─0cd8e7f50270 Size: 1418392
  │           └─594b6f8e6f92 Size: 0
  │             └─f832a63e87a4 Size: 0 Tags: redis:latest
  └─02dae1c13f51 Size: 98348330
    └─e7206bfc66aa Size: 190007
      └─cb12405ee8fa Size: 1903
        └─316b678ddf48 Size: 70822908 Tags: ubuntu:13.04, ubuntu:raring

It is also possible to show the image's CreatedBy field, for help identifying image layers when they show up with "<missing>" image Ids.

Running

Dockviz supports connecting to the Docker daemon directly. It defaults to unix:///var/run/docker.sock, but respects the following as well:

The DOCKER_HOST, DOCKER_CERT_PATH, and DOCKER_TLS_VERIFY environment variables, as set up by boot2docker or docker-machine.
Command line arguments (e.g. --tlscacert), like those that Docker itself supports.

Dockviz also supports receiving Docker image or container json data on standard input.

$ curl -s http://localhost:4243/images/json?all=1 | dockviz --stdin images --tree
$ curl -s http://localhost:4243/containers/json?all=1 | dockviz --stdin containers --dot | dot -Tpng -o containers.png
$ echo -e "GET /images/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed '1,/^[[:space:]]*$/d' | dockviz --stdin images --tree
$ echo -e "GET /containers/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed '1,/^[[:space:]]*$/d' | dockviz --stdin containers --dot | dot -Tpng -o containers.png
$ echo -e "GET /images/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed '1,/^[[:space:]]*$/d' | docker run -i nate/dockviz --stdin images --tree
$ echo -e "GET /containers/json?all=1 HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed '1,/^[[:space:]]*$/d' | docker run -i nate/dockviz --stdin containers --dot | dot -Tpng -o containers.png

Note: GNU netcat doesn't support -U (UNIX socket) flag, so OpenBSD variant can be used.

Binaries

See the releases area for binaries.

Build

# install graphviz in host environment for rendering (Debian example)
sudo apt-get install git graphviz -y

# pull latest code
mkdir -p $GOPATH/src/github.com/nate/ && cd $GOPATH/src/github.com/nate/
git clone https://github.com/nate/dockviz.git && cd dockviz

# force static compilation for go language
export CGO_ENABLED=0

# fetch vendored dependencies
govendor sync

# build
go build

# build docker image
docker build --no-cache=true -t "nate/dockviz:1.0" -t "nate/dockviz:latest" .

# push to docker hub
docker login --username=mygituser --password=xxxxxxx
docker push nate/dockviz