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Troubleshooting Docker

You're reading from Troubleshooting Docker Develop, test, automate, and deploy production-ready Docker containers

Product type Paperback

Published in Mar 2017

Publisher Packt

ISBN-13 9781783552344

Length 290 pages

Edition 1st Edition

Tools

Docker

Concepts

Containerization

Authors (4):

John Wooten

Navid Ahmed Shaikh

Vaibhav Kohli

Rajdeep Dua

View More author details

Table of Contents (11) Chapters

Preface

1. Understanding Container Scenarios and an Overview of Docker FREE CHAPTER

2. Docker Installation

3. Building Base and Layered Images

4. Devising Microservices and N-Tier Applications

5. Moving Around Containerized Applications

6. Making Containers Work

7. Managing the Networking Stack of a Docker Container

8. Managing Docker Containers with Kubernetes

9. Hooking Volume Baggage

10. Docker Deployment in a Public Cloud - AWS and Azure

Troubleshooting the Kubernetes Fedora manual setup

If the kube-apiserver fails to start, it might be due to service account admission control and require a service account and a token before allowing pods to be scheduled. It is generated automatically by the controller. By default, the API server uses a TLS serving key, but as we are not sending over HTTPS and don't have a TLS server key, we can provide the API server the same key file in order for the API server to validate generated service-account tokens.

Use the following to generate the key and add it to the k8s cluster:

        openssl genrsa -out /tmp/serviceaccount.key 2048

To start the API server, add the following option to the end of the /etc/kubernetes/apiserver file:

         KUBE_API_ARGS="--
         service_account_key_file=/tmp/serviceaccount.key"

/etc/kubernetes/kube-controller-manager add the following option to the end of the file:

        KUBE_CONTROLLER_MANAGER_ARGS=" -
        service_account_private_key_file...

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Authors (4)

Navid Ahmed Shaikh

Navid Ahmed Shaikh

See other products by Navid Ahmed Shaikh

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.

See other products by Vaibhav Kohli

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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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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