Book Image

Troubleshooting Docker

By : Vaibhav Kohli, Rajdeep Dua, John Wooten
Book Image

Troubleshooting Docker

By: Vaibhav Kohli, Rajdeep Dua, John Wooten

Overview of this book

You?re pro Docker? You?ve read all about orchestration with Docker in books? Now learn how to troubleshoot Docker in practice. Gain all the tools to safely see Docker in action with this 2017 book.

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Table of Contents (17 chapters)
Troubleshooting Docker
Troubleshooting Docker
Credits
Credits
About the Authors
About the Authors
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Customer Feedback
Customer Feedback
Preface
Preface
Free Chapter
1
Understanding Container Scenarios and an Overview of Docker
Understanding Container Scenarios and an Overview of Docker
Decoding containers
Unikernels
Summary
2
Docker Installation
Docker Installation
Installing Docker on Ubuntu
Installing Docker on Red Hat Linux
Deploy CentOS VM on AWS to run Docker containers
Installing Docker on CoreOS
Installing Docker on Fedora
Installing Docker with script
Installing Docker on SUSE Linux
Summary
3
Building Base and Layered Images
Building Base and Layered Images
Building container images
Image testing and debugging
Automated image building
Summary
4
Devising Microservices and N-Tier Applications
Devising Microservices and N-Tier Applications
Hype or hubris
Monolithic architecture
N-tier application architecture
Microservices architecture
Summary
5
Moving Around Containerized Applications
Moving Around Containerized Applications
Redistributing via Docker registry
Pushing images to Docker Hub
Docker Trusted Registry (DTR)
Docker Universal Control Plane
Summary
6
Making Containers Work
Making Containers Work
Privileged containers
Super-privileged container
Puppet
Ansible
Chef
Summary
7
Managing the Networking Stack of a Docker Container
Managing the Networking Stack of a Docker Container
Docker networking
docker0 bridge
Configuring DNS
Troubleshooting communication between containers and the external network
libnetwork and the Container Network Model
Docker networking tools based on overlay and underlay networks
Configuring an overlay network with the Docker Engine swarm node
Configuring OpenvSwitch (OVS) to work with Docker
Summary
8
Managing Docker Containers with Kubernetes
Managing Docker Containers with Kubernetes
Deploying Kubernetes on Bare Metal machine
Troubleshooting the Kubernetes Fedora manual setup
Deploying Kubernetes using Minikube
Deploying Kubernetes on AWS
Deploying Kubernetes on vSphere
Kubernetes setup troubleshooting
Kubernetes pod deployment
Deploying Kubernetes in a production environment
Debugging Kubernetes issues
Summary
9
Hooking Volume Baggage
Hooking Volume Baggage
Avoiding troubleshooting by understanding Docker volumes
Default case storing data inside the Docker container
Data-only container
Host mapped volume backed up by shared storage
Docker storage driver performance
Summary
10
Docker Deployment in a Public Cloud - AWS and Azure
Docker Deployment in a Public Cloud - AWS and Azure
Architecture of Amazon ECS
Troubleshooting - AWS ECS deployment
Updating Docker containers in the ECS cluster
Microsoft Azure container service architecture
Troubleshooting - The Microsoft Azure Container Service
Docker Beta for AWS and Azure
Summary

Pushing images to Docker Hub

We can create a customized image that can then be pushed on Docker Hub using tagging. Let's create a simple image with a small terminal-based application. Create a Dockerfile with the following content:

FROM debian:wheezy 
RUN apt-get update && apt-get install -y cowsay fortune

Go to the directory containing the Dockerfile and execute the following command to build an image:

$ docker build -t test/cowsay-dockerfile . 
Sending build context to Docker daemon 2.048 kB 
Sending build context to Docker daemon 
Step 0 : FROM debian:wheezy 
wheezy: Pulling from debian 
048f0abd8cfb: Pull complete 
fbe34672ed6a: Pull complete 
Digest: sha256:50d16f4e4ca7ed24aca211446a2ed1b788ab5e3e3302e7fcc11590039c3ab445 
Status: Downloaded newer image for debian:wheezy 
 ---> fbe34672ed6a 
Step 1 : RUN apt-get update && apt-get install -y cowsay fortune 
 ---> Running in ece42dc9cffe

Alternatively...

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