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Home > Cloud & Networking > Containerization > Troubleshooting Docker
Troubleshooting Docker
Troubleshooting Docker

Troubleshooting Docker: Develop, test, automate, and deploy production-ready Docker containers

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Troubleshooting Docker

Chapter 2. Docker Installation

Docker installation is pretty smooth in most of the operating systems, and there are very few chances of things going wrong. Docker Engine installation is supported mostly on all the Linux, Cloud, Windows, and Mac OS X environments. If the Linux version is not supported, then Docker Engine can be installed using binaries. Docker binary installation is mostly oriented for hackers who want to try out Docker on a variety of OS. It usually involves checking runtime dependencies, kernel dependencies, and using Docker platform-specific binaries in order to move ahead with installation.

Docker Toolbox is an installer, which can be used to quickly install and set up a Docker environment on your Windows or Mac machine. Docker toolbox also installs:

  • Docker client: It executes commands, such as build and run, and ship containers by communicating with the Docker daemon
  • Docker Machine: It is a tool used to install Docker Engine on virtual hosts and manages them...

Installing Docker on Ubuntu

Let's get started with installing Docker on Ubuntu 14.04 LTS 64-bit. We can use AWS AMI in order to create our setup. The image can be launched on AMI directly with the help of following link:

http://thecloudmarket.com/image/ami-a21529cc--ubuntu-images-hvm-ssd-ubuntu-trusty-14-04-amd64-server-20160114-5

The following diagram illustrates the installation steps required to install Docker on Ubuntu 14.04 LTS:

Installing Docker on Ubuntu

Prerequisites

Docker requires a 64-bit installation, regardless of the Ubuntu version. The kernel must be 3.10 at minimum.

Let's check our kernel version, using the following command:

$ uname -r

The output is a kernel version of 3.13.x, which is fine:

3.13.0-74-generic

Updating package information

Perform the following steps to update the APT repository and have necessary certificates installed:

  1. Docker's APT repository contains Docker 1.7.x or higher. To set APT to use packages from the new repository:
            $ sudo apt-get update
  2. Run the following...

Installing Docker on Red Hat Linux

Docker is supported on Red Hat Enterprise Linux 7.x. This section provides an overview of installation of Docker using Docker-managed release packages and installation mechanisms. Using these packages ensures that you will be able get the latest release of Docker.

Installing Docker on Red Hat Linux

Checking kernel version

The Linux kernel version can be checked with the help of the following command:

$ uname -r

The output, in our case, is kernel version 3.10.x, which will work fine:

3.10.0-327.el7.x86 _64

Updating the YUM packages

The YUM repository can be updated, using the following command:

$ sudo yum update

Output listing is given; ensure that it shows Complete! at the end, as follows:

Loaded plugins: amazon-id, rhui-lb, search-disabled-repos 
rhui-REGION-client-config-server-7       | 2.9 kB   
.... 
Running transaction check 
Running transaction test 
Transaction test succeeded 
Running transaction 
  Installing : linux-firmware-20150904-43.git6ebf5d5.el7.noarch      1/138  
  Updating...

Deploy CentOS VM on AWS to run Docker containers

We are using AWS as an environment to showcase Docker installation from a convenience perspective. If an OS needs to be tested for support of its Docker version, AWS is the easiest and quickest way to deploy and test it.

If you are not using AWS as an environment, feel free to skip the steps involving spinning a VM on AWS.

In this section, we'll take a look at deploying CentOS VM on AWS to get the environment up and running fast and deploy Docker containers. CentOS is similar to Red Hat's distribution and uses the same packaging tools like YUM. We will use CentOS 7.x, on which Docker is officially supported:

First, let's launch a CentOS-based VM on AWS:

Deploy CentOS VM on AWS to run Docker containers

We are launching with a 1-Click Launch and pre-existing keypair. SSH is enabled by default:

Deploy CentOS VM on AWS to run Docker containers

Once the instance is up, get the public IP address from the AWS EC2 console.

SSH into the instance and follow the following steps for installation:

$ ssh -i &quot...

Installing Docker on CoreOS

CoreOS is a lightweight OS built for the cloud. It comes prepackaged with Docker, which is a few releases behind the latest version. Since it comes prebuilt with Docker there is little troubleshooting required. We just need to make sure that the right version of CoreOS is picked.

CoreOS runs on a variety of platforms, including Vagrant, Amazon EC2, QEMU/KVM, VMware and OpenStack, and custom hardware. CoreOS uses fleet to manage clusters of containers along with etcd (key value data store).

Installation channels of CoreOS

In our case, we will use stable  Release Channels:

Installation channels of CoreOS

First, we will install CoreOS on AWS using the CloudFormation templates. You can find this template at the following link:

 https://s3.amazonaws.com/coreos.com/dist/aws/coreos-stable-pv.template

This template provides the following parameters:

  • Instance type
  • Cluster size
  • Discovery URL
  • Advertised IP address
  • Allow SSH From
  • Keypair

These mentioned parameters can be set in the default template...

Installing Docker on Ubuntu

Let's get started with installing Docker on Ubuntu 14.04 LTS 64-bit. We can use AWS AMI in order to create our setup. The image can be launched on AMI directly with the help of following link:

http://thecloudmarket.com/image/ami-a21529cc--ubuntu-images-hvm-ssd-ubuntu-trusty-14-04-amd64-server-20160114-5

The following diagram illustrates the installation steps required to install Docker on Ubuntu 14.04 LTS:

Prerequisites

Docker requires a 64-bit installation, regardless of the Ubuntu version. The kernel must be 3.10 at minimum.

Let's check our kernel version, using the following command:

$ uname -r

The output is a kernel version of 3.13.x, which is fine:

3.13.0-74-generic

Updating package information

Perform the following steps to update the APT repository and have necessary certificates installed:

  1. Docker's APT repository contains Docker 1.7.x or higher. To set APT to use packages from the new repository:

            $ sudo apt-get update

  2. Run the following command...

Installing Docker on Red Hat Linux

Docker is supported on Red Hat Enterprise Linux 7.x. This section provides an overview of installation of Docker using Docker-managed release packages and installation mechanisms. Using these packages ensures that you will be able get the latest release of Docker.

Checking kernel version

The Linux kernel version can be checked with the help of the following command:

$ uname -r

The output, in our case, is kernel version 3.10.x, which will work fine:

3.10.0-327.el7.x86 _64

Updating the YUM packages

The YUM repository can be updated, using the following command:

$ sudo yum update

Output listing is given; ensure that it shows Complete! at the end, as follows:

Loaded plugins: amazon-id, rhui-lb, search-disabled-repos 
rhui-REGION-client-config-server-7       | 2.9 kB   
.... 
Running transaction check 
Running transaction test 
Transaction test succeeded 
Running transaction 
  Installing : linux-firmware-20150904-43.git6ebf5d5...

Deploy CentOS VM on AWS to run Docker containers

We are using AWS as an environment to showcase Docker installation from a convenience perspective. If an OS needs to be tested for support of its Docker version, AWS is the easiest and quickest way to deploy and test it.

If you are not using AWS as an environment, feel free to skip the steps involving spinning a VM on AWS.

In this section, we'll take a look at deploying CentOS VM on AWS to get the environment up and running fast and deploy Docker containers. CentOS is similar to Red Hat's distribution and uses the same packaging tools like YUM. We will use CentOS 7.x, on which Docker is officially supported:

First, let's launch a CentOS-based VM on AWS:

We are launching with a 1-Click Launch and pre-existing keypair. SSH is enabled by default:

Once the instance is up, get the public IP address from the AWS EC2 console.

SSH into the instance and follow the following steps for installation:

$ ssh -i "ubuntu-1404-1.pem" centos@54.238.154.134

...

Installing Docker on CoreOS

CoreOS is a lightweight OS built for the cloud. It comes prepackaged with Docker, which is a few releases behind the latest version. Since it comes prebuilt with Docker there is little troubleshooting required. We just need to make sure that the right version of CoreOS is picked.

CoreOS runs on a variety of platforms, including Vagrant, Amazon EC2, QEMU/KVM, VMware and OpenStack, and custom hardware. CoreOS uses fleet to manage clusters of containers along with etcd (key value data store).

Installation channels of CoreOS

In our case, we will use stable  Release Channels:

First, we will install CoreOS on AWS using the CloudFormation templates. You can find this template at the following link:

 https://s3.amazonaws.com/coreos.com/dist/aws/coreos-stable-pv.template

This template provides the following parameters:

  • Instance type

  • Cluster size

  • Discovery URL

  • Advertised IP address

  • Allow SSH From

  • Keypair

These mentioned parameters can be set in the default template, as follows:

{...
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Key benefits

  • ? Docker programming and installation of ecosystem tools and services, Microservices and N-tier applications ? Creating re-usable, portable containers with help of automation tools ? Learning about using Docker in production projects ? Functions of network and inter-link containers ? Attaching volumes securely to containers ? Consuming and troubleshooting Docker APIs ? Troubleshooting issue of Docker deployment in Public cloud ? Easing the process of container management with Kubernetes

Description

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.

Who is this book for?

? Experienced solutions architects, developers, DevOps engineers, programmers, system engineers and administrators ? Those with advanced familiarity with the Linux command line syntax, unit testing, the Docker Registry, Github and leading container hosting platforms and Cloud Service Providers (CSP) ? Anyone looking to build production-ready Docker containers for automated deployment

What you will learn

  • You?ll learn both the basic functions and advanced features for staying safe with Docker. From designing and troubleshooting to automating containers from development to deployment, learn how to effectively containerize and manage Docker.

Product Details

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Publication date : Mar 30, 2017
Length: 290 pages
Edition : 1st
Language : English
ISBN-13 : 9781785285363
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Category :
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Concepts :
Containerization
Tools :
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Publication date : Mar 30, 2017
Length: 290 pages
Edition : 1st
Language : English
ISBN-13 : 9781785285363
Vendor :
Docker
Category :
Cloud & Networking
Concepts :
Containerization
Tools :
Docker

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Table of Contents

10 Chapters
1. Understanding Container Scenarios and an Overview of Docker Chevron down icon Chevron up icon
1. Understanding Container Scenarios and an Overview of Docker
Decoding containers
Unikernels
Summary
2. Docker Installation Chevron down icon Chevron up icon
2. 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 Chevron down icon Chevron up icon
3. Building Base and Layered Images
Building container images
Image testing and debugging
Automated image building
Summary
4. Devising Microservices and N-Tier Applications Chevron down icon Chevron up icon
4. Devising Microservices and N-Tier Applications
Hype or hubris
Monolithic architecture
N-tier application architecture
Microservices architecture
Summary
5. Moving Around Containerized Applications Chevron down icon Chevron up icon
5. 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 Chevron down icon Chevron up icon
6. Making Containers Work
Privileged containers
Super-privileged container
Puppet
Ansible
Chef
Summary
7. Managing the Networking Stack of a Docker Container Chevron down icon Chevron up icon
7. 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 Chevron down icon Chevron up icon
8. 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 Chevron down icon Chevron up icon
9. 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 Chevron down icon Chevron up icon
10. 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

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About the 4 authors

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Profile icon Navid Ahmed Shaikh
Navid Ahmed Shaikh
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Profile icon Vaibhav Kohli
Vaibhav Kohli
Vaibhav Kohli at present is working in VMware's R&D Department and earlier taught computer engineering for a year at the esteemed University of Mumbai. He works for the office of the CTO, VMware IoT (Internet of Things) project. He has published many research papers in leading journals, IEEE transactions, and has filed patents at VMware on container technology. One of his big data projects has won the top prize at the national-level project showcase event. He has conducted workshops, hackathons, training sessions, and trade shows in many countries and is a reputed & established speaker at conferences on IoT and Docker technology. He is an active open source code contributor, repository manager and has also published many online Docker & Kubernetes tutorials. He has helped many customers and organizations to understand cloud-native apps, DevOps model and migrate to micro-service architecture. He has also recently published a book on Docker Networking. Vaibhav manages and leads various meetup groups across India on the latest cutting-edge Docker and Kubernetes technologies.
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Profile icon John Wooten
John Wooten
John Wooten is the founder and CEO of CONSULTED, a global open source cloud consultancy that designs secure, succinct, and sustainable cloud architectures. As a leading cloud solutions architect and open technology strategist, John has deep and applicable realworld experience in designing, testing, deploying, and managing public, private, and hybrid cloud systems for both enterprise and government. His primary technical proficiencies include Linux systems administration, OpenStack clouds, and Docker containers. As an open source activist, John is committedly passionate and works extensively within a broad range of open source projects and communities. His latest Internet project is as the founder and maintainer of ÖppenSourced, a leading repository and defining resource on open source projects and applications. Otherwise, he is a self-proclaimed beach bum in search of the next surfable wave or is hiking and camping in remote locations.
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Profile icon Dua
Dua
Rajdeep Dua has over 18 years experience in the cloud and big data space. He has taught Spark and big data at some of the most prestigious tech schools in India: IIIT Hyderabad, ISB, IIIT Delhi, and Pune College of Engineering. He currently leads the developer relations team at Salesforce India. He has also presented BigQuery and Google App Engine at the W3C conference in Hyderabad. He led the developer relations teams at Google, VMware, and Microsoft, and has spoken at hundreds of other conferences on the cloud. Some of the other references to his work can be seen at Your Story and on ACM digital library. His contributions to the open source community relate to Docker, Kubernetes, Android, OpenStack, and Cloud Foundry.
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  • To view your account details or to download a new copy of the book go to www.packtpub.com/account
  • To contact us directly if a problem is not resolved, use www.packtpub.com/contact-us
What eBook formats do Packt support? Chevron down icon Chevron up icon

Our eBooks are currently available in a variety of formats such as PDF and ePubs. In the future, this may well change with trends and development in technology, but please note that our PDFs are not Adobe eBook Reader format, which has greater restrictions on security.

You will need to use Adobe Reader v9 or later in order to read Packt's PDF eBooks.

What are the benefits of eBooks? Chevron down icon Chevron up icon
  • You can get the information you need immediately
  • You can easily take them with you on a laptop
  • You can download them an unlimited number of times
  • You can print them out
  • They are copy-paste enabled
  • They are searchable
  • There is no password protection
  • They are lower price than print
  • They save resources and space
What is an eBook? Chevron down icon Chevron up icon

Packt eBooks are a complete electronic version of the print edition, available in PDF and ePub formats. Every piece of content down to the page numbering is the same. Because we save the costs of printing and shipping the book to you, we are able to offer eBooks at a lower cost than print editions.

When you have purchased an eBook, simply login to your account and click on the link in Your Download Area. We recommend you saving the file to your hard drive before opening it.

For optimal viewing of our eBooks, we recommend you download and install the free Adobe Reader version 9.