Docker

byLim

Simple and easy way to distribute applications and build environments.

Basics

  1. 1 How to create/use Dockerfiles 32
  2. 2 Online Docker Tutorial 15
  3. 3 Docker: Remove all images and containers 1
  4. 4 Docker can now run within Docker 4

Optimising

  1. 1 Reduce size of Docker image 18
  2. 2 Using pigz for compression 6
  3. 3 Building Efficient Dockerfiles 7

Troubleshooting

  1. 1 Docker can't connect to boot2docker 3
  2. 2 How to find IP for Docker container 6
  3. 3 How to connect to dockerized MongoDB 2
  4. 4 Show git progress 0
  5. 5 Increasing a Boot2Docker volume 2
  6. 6 NodeJS port not exposed 0
  7. 7 Configure Elastic Beanstalk build timeout 1

Common tasks

  1. 1 Remove Untagged Images From Docker 2
  2. 2 Routing logs for all containers 2

Docker Registry

  1. 1 How to fix --insecure-registry problem 3
  2. 2 How to use your own private local registry with Docker 1
  3. 3 Docker Registry API 1
  4. 4 UI for private Docker Registry 1
  5. 5 Docker registry with authentication 1

Lessons Learnt

Don’t let the number of unused images and containers build up as the VM will start running out of space and you will have odd errors.

Here are a couple of handy commands to help wiht the tidy up:

  • Remove all exited containers
    docker ps -a | grep 'Exited' | awk '{print $1}' | xargs docker rm

  • remove all images with no tag
    docker images | grep '<none>' | awk '{print $3}' | xargs docker rmi

Videos

  1. 1 Tricks of the trade 5
  2. 2 Deploy Docker container with Jenkins 5

Using Docker in CI

  1. 1 Dockerized Selenium 4
  2. 2 AWS Elastic Beanstalk Deployment Plugin 3
  3. 3 AWS Command Line interface (CLI) 1
  4. 4 Install aws-cli using brew 0
  5. 5 AWS CLI Reference 0

Useful images

  1. 1 Java 6
  2. 2 MongoDB 8
  3. 3 Tomcat 4
  4. 4 Maven 4
  5. 5 Dockerized Selenium Grid 4

Datadog and Docker

  1. 1 Dockerize Datadog 3
  2. 2 Datadog installation 1

Misc

  1. 1 Create the smallest possible Docker container 4
  2. 2 Migrating to the Whale 0

Dockerizing things

  1. 1 How to Dockerize your Dropwizard Application 3

Setting up Datadog in Docker

Annoyingly the instructions for setting up Datadog is at https://app.datadoghq.com/account/settings#agent/docker but requires a login as it generates an API key for your account.

But basically the code to add to the Dockerfile should look something like:
ENV DD_API_KEY <API_KEY>

RUN bash -c "$(curl -L https://raw.githubusercontent.com/DataDog/dd-agent/master/packaging/datadog-agent/source/install_agent.sh)"

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