Setup Docker service to use insecure(http) registry instead of https

By default docker use https to connect to docker registry. But there can be use cases to use insecure registry. Here are the steps to use insecure registry. In ubuntuedit…

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How to upload and download docker images using nexus registry/repository?

Step 1- Setup your Nexus server and required authentication Step 2- Create docker repo at Nexus Step 3- Install Docker & Configure with non httpds Docker Install and Config –…

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Newrelic Infrastructure: Monitor Docker and Containers using Newrelic Infrastructure

Newrelic Infrastructure: Monitor Docker and Containers using Newrelic Infrastructure. Requirements & prerequisite How to Install, Enable and Start Docker Engine in Centos How to Install, Enable and Start Docker Engine…

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What is Docker? Benefits of Using Docker?

Docker, an open-source technology containerization tools that use OS-level virtualization to deliver software in packages called containers. Docker designed to make it easier to create, deploy, and run applications by…

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Is Docker certification worth it? Docker Certified Associate (DCA) – Explained

Software development is not about writing code these days. Multiple languages, frameworks, architectures, and discontinuous interfaces between tools for each lifecycle stage creates huge complexities. Docker facilitate and accelerates workflow,…

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What is Docker Enterprise 3.0? Detailed Exaplanations.

Docker Enterprise is designed for enterprise development as well as IT teams who build, share, and run business-critical applications at scale in production. With Docker Enterprise, you can manage container…

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Difference between Docker Community Edition (CE) vs Docker Enterprise Edition (EE) in 2020

What is Docker Community Edition? Docker Engine has been renamed to Docker Community Edition, and, as the name suggests, community supported version of Docker that’s available for free of cost….

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Docker Certified Associate Exam Topics and Agenda

This examination is based upon critical job activities a Docker Certified Associate performs. The skills and knowledge certified by this examination represent a level of expertise where a certifiedDocker Associate…

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Docker Errors and Solutions Database

Docker Error: Auzre RHEL 7.4 “Requires: container-selinux >= 2:2.74” Docker Error – Requires: container-selinux >= 2:2.74 Docker Error: JOB FOR DOCKER.SERVICE FAILED BECAUSE THE CONTROL PROCESS EXITED WITH ERROR CODE…

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Docker Error: Auzre RHEL 7.4 “Requires: container-selinux >= 2:2.74”

Solutions: Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock…

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Docker Interview Questions and Answer Part – 35

What Docker technologies are available to support communication between containers? Docker connect and bridge networks Docker linking and bridge networks (Ans) Docker connect and alias networks None of these Bridge…

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Docker Interview Questions and Answer Part – 34

Which of the following open-source tools is the underlying technology for Docker Swarm? containerd SwarmKit (Ans) Kubernetes InfraKit The Docker daemon Docker UCP implements RBAC via Grants. Which of the…

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Docker Interview Questions and Answer Part – 33

Which of the following best decribes a Docker Image? A read-write template for starting one or more containers A point-in-time snapshot of a container used for backups A data volume…

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Docker Interview Questions and Answer Part – 32

Which of the following are true about Docker volumes? They must exist on a SAN or NAS They are decoupled from containers (Ans) They are higher performance than graph driver…

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Docker Interview Questions and Answer Part – 31

What is the preferred way to deploy and manage a Docker Stack? The declarative way via config files (Ans) The imperative way via commands Which of the following Docker Engine…

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Docker Interview Questions and Answer Part – 30

Images contain the entire user space, in other words the entire file system for a container. How is this not horribly inefficient in terms of disk space? Images are layered…

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Docker Interview Questions and Answer Part – 29

With Docker for Windows, what container types can you run? Only Windows Windows and macOS Windows and Linux (Ans) Only Linux Which of the following is an accurate statement about…

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Docker Interview Questions and Answer Part – 28

What is a tag? A reference to a registry A reference to a repository A reference to a specific image in a repository (Ans) A reference to a specific image…

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Docker Interview Questions and Answer Part – 27

By default, what happens to a Docker Container when the process it is running exits? The Container exits. (Ans) The Container reboots and restarts the process. The Container performs a…

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Docker Interview Questions and Answer Part – 26

What Docker Client command can be used to convert a Dockerfile into an Image? docker createimage docker buildimage docker build (Ans) docker create Which of the following statements accurately describe…

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Docker Interview Questions and Answer Part – 25

Docker Kitematic can ONLY be used to download Docker images. True False (Ans) Services can be organized into __ with Docker Cloud. roles stacks (Ans) zones groups Docker works the…

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Docker Interview Questions and Answer Part – 24

Which of the following tasks can Docker Cloud perform? Create nodes None of these Start and stop services All of these (Ans) Create stacks What is the role of Docker…

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Docker Interview Questions and Answer Part – 23

Which of the following are top-level keys in a stack file (Compose v3 file)? Version, deployments, networks, volumes Version and services Version, services, networks, volumes (Ans) Services, pods, networks, volumes…

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Docker Interview Questions and Answer Part – 22

Which of the following is a recommended best practice? Keep your images small (Ans) Never use the latest image in a repo Use large images containing lots of tools Only…

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Docker Interview Questions and Answer Part – 21

Which of the following is needed to deploy a Docker Stack? Compose v2 file format Kubernetes Compose v3 file format Docker Cloud (Ans) What is the name of the configuration…

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Docker Interview Questions and Answer Part – 20

What type of software deals with running (placement) applications on a given node in the cluster? Placer VM runtime Container runtime Provisioner Scheduler (Ans) What is the net effect of…

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Docker Interview Questions and Answer Part – 19

What can you use to run multiple containers from a single YAML file? Dockerfile docker run docker-compose (Ans) docker run containers.yml Which of the following is not a benefit of…

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Docker Interview Questions and Answer Part – 18

If you want to perform maintenance on a node, to what availability should you change it? Ready Down Drain (Ans) Pause Active Assuming you have a stack called APIS, what…

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Docker Interview Questions and Answer Part – 17

If you run docker network ls and do not see a network that you’re looking for, what is the most likely culprit?culprit? That node is not a worker node. That…

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Docker Interview Questions and Answer Part – 16

Which of the following will upload a new stack to your Docker Cloud account? docker-cloud stack create docker-cloud.yml docker-cloud stack create -f docker-cloud.yml (Ans) docker-cloud stack create -f dockerfile docker…

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