#Docker run image to container install#

This is the type of information thatВ can help when troubleshooting microservices that have a web of dependencies, or when calculating the risk of a major upgrade.ДЄuthor Fabian Posted on Categories Containers, Scripting Tags container, docker, dockviz, graph, image, visualization Post navigation When you are running hundreds of containers, having a picture of these dependencies is invaluable. Open вЂњcontainers.pngвЂќ, and as you can see below we have a picture of our dockviz container running on the left, and then we have a single MongoDB instance thatВ both Python Flask web containers are dependent upon. Now, when we run dockvizВ to show us the containers (-r switch meansВ only those running): $ dockviz containers -d -r | dot -Tpng -o /Documents/containers.png This will take a minute the first time you run it because the various images have to be downloaded. If you donвЂ™t have docker-compose installed, you can read my article here. I have modified that example slightly so that you have two web front ends, both hitting the same MongoDB database.Д«elow are the instructions for bringing up this set of hosts. On, there is an example application that uses a single MongoDB backend, with a Python Flask web application as the front end for end userвЂ™s browsers.

$ dockviz containers -d -r | dot -Tpng -o /Documents/containers.pngД«ut if you need a smoke test, weВ can pretty easily create a set ofВ dockerВ containers that are linked together. In order to testВ dockerviz, you can just run it on the containers and images youВ already have loaded and running on your system. That is the reason I added the bash command and size to theВ graph node as an identifier. The tag is not an error, ever since Docker 1.10 and content addressability, this value is empty. If you have a lot of docker images, this picture can be very wide, so IвЂ™ll just cut out the portion relevant to the docker/whalesay image.ДЄs you can see on the right, the generated graphВ essentially shows the same information as вЂњdocker historyвЂќ, with each image layer and its size visible. $ sudo dockviz images -d | dot -Tpng -o images.png # use dockviz to generate picture of image history $ sudo docker history $(docker images docker/whalesay -q)

# console - show lineage of whalesay container

$ sudo docker run docker/whalesay cowsay hello LetвЂ™s spin up a quick sample, then view an imageВ history: # quick docker run If you are using a local unix socket to connect to the Docker daemon: $ alias dockviz='sudo docker run -it -rm -v /var/run/docker.sock:/var/run/docker.sock fabianlee/dockviz'ДЄnd if you are using TCP to the Docker daemon: $ alias dockviz='sudo docker run -it -e DOCKER_HOST='tcp://127.0.0.1:2375' fabianlee/dockviz' VisualizeВ Image History In order to make invocation easier (instead of typing aВ long command every time), create an alias for running the dockviz container.

#Docker run image to container install#

This can be installed like: $ sudo apt-get install graphviz -y Create alias Then, in order to render the container and image information as a PNG image you will need the вЂњgraphvizвЂќ package on the host system. If you have not installed Docker on Ubuntu, read my article here first. IвЂ™ve made a few changes to the original project to fix issues with newer versions of docker, so IвЂ™ve repackaged NateвЂ™s images. The DockerВ console commands for listing and viewing containers and images (ps, images, history, inspect) provides a wealth of information, but when you are managing hundreds of containers, a graph view of the containerВ inventory and their dependencies can be critical for operations.Дockviz can help you visualize your containers and images by creating an PNG image representing the container links and image lineage.