Academy PRO: Docker. Lecture 1

Jun 20, 2017Download as PPTX, PDF0 likes119 views

This document provides an agenda for a Docker Academy PRO course. It introduces Docker and containerization basics, including what containers are, how they work, and the challenges they solve compared to traditional virtual machines. It discusses Docker specifically, how it helps build and deploy applications, and how the Docker ecosystem works with components like Containerd and runC. Overall it serves as an introduction and overview to Docker and containerization concepts.

Course’s
Agenda
Introduction to Docker
Containerization Basics
Orchestration Basics
Miscellaneous

Today’s
Agenda
What is containers?
Challenges & Solutions
How it works?

What is Docker?
Docker is an open platform that helps companies build, ship and run their
applications everywhere.

Evolution of IT
Earlier
Thick client
Well defined stack
Monolith
infrastructure
Today
Thin client
Many different
services
Running on different
set of resources

Static website
UserDB
API
Web Frontend Queue
Redis + Redis-sentinel
Node.js + Express + Mongoose
MongoDB
Webpack + React + Redux
nginx + bootstrap
Development VM
QA server
Public cluster
Production server
Contributors laptop
Customer datacenter

cgroups - Linux kernel feature that limits, accounts for,
and isolates the resource usage (CPU, memory, disk I/O,
network, etc.) of a collection of processes.
namespaces - feature of the Linux kernel that isolates
and virtualizes system resources of a collection of
processes (pid, mnt, net..)
Linux Containers - operating-system-level virtualization
method for running multiple isolated Linux systems
(containers) on a control host using a single Linux kernel.
LXC combines the kernel's cgroups and support for
isolated namespaces to provide an isolated environment
for applications.

High level approach: lightweight VM
own process space
own network interface
can run stuff as root
can have own sbin/init

Low level approach: chroot on steroids
can also not have its own sbin/init
container = isolated process(es)
share kernel with host
no device emulation

Separation of concerns
Inside:
code
libs
package manager
app
data
Outside:
logging
remote access
network configuration
monitoring

Build once - run everywhere!
Linux containers is units of software development
run everywhere
regardless of kernel version
regardless of host distro
BUT container and host architecture must match
run anything
if you can run it on host - you can run in the container

Virtualization
Advantages:
Multiple OS on same machine
Easy maintenance and recovery
Lower total cost of ownership
Disadvantages:
Multiple VMs Lead to Unstable performance

Containerization
Advantages over virtualization:
Containers on same OS kernel are lighter and
smaller
Better resource utilization
Short boot-up process

Resource/Memory Utilization
16Gb 3Gb
2Gb
1Gb
4Gb
4Gb2Gb
16Gb 3Gb
4Gb
2Gb
VM Containers
7 Gb of Memory blocked and
cannot be used for new VMs

Containerd - industry-standard container runtime
with an emphasis on simplicity, robustness and
portability. It is available as a daemon for Linux and
Windows, which can manage the complete container
lifecycle of its host system: image transfer and
storage, container execution and supervision, low-
level storage and network attachments, etc..
runC - CLI tool for spawning and running
containers according to the OCI (Open Container
Initiative) specification.

What is Docker? #2
Docker is containerization platform which packages your application and all its
dependencies together in the form of containers so as to ensure that your
application works in the same way in any environment be it Development or
Test or Production

Why Docker?
Isolation
Lightweight
Simplicity
Workflow
Community

Official Docker Images
https://hub.docker.com/explore/?page=1

Docker allows users to package and run applications in lightweight containers. Containers are hardware and platform agnostic, making applications portable across computing environments from laptops to large servers. Docker utilizes Linux containers (LXC) which provide isolated mini operating systems within a host operating system without the overhead of virtual machines. Containers are more lightweight and efficient than virtual machines, allowing for faster deployment and scaling of applications. Docker makes containers reusable and provides a consistent environment for development and production.

HLayer / Docker and its ecosystemAymen EL Amri

This document discusses Docker and its ecosystem. It provides a history of container technologies from chroot jails in 1979 to modern tools like Docker, Kubernetes, containerd, and RunC. It describes the architecture and components of Docker including how it leverages containerd and RunC. Finally, it discusses orchestration tools like Kubernetes and how Docker is organized into various modular projects under the Moby project.

Civil War: LXD vs DockerOpenNebula Project

Linux containersindikadias

Linux containers allow multiple applications to run in isolation on a single Linux host using process-level virtualization through kernel features like namespaces and cgroups. Containers use fewer resources than virtual machines since they share the same Linux kernel and are lighter weight. Docker is a popular tool for automating the creation, deployment and management of containers, allowing containers to be easily shared and migrated across servers.

LXD Container HypervisorDanial Behzadi

LXD is a container "hypervisor" and a new user experience for LXC. The daemon exports a REST API both locally and if enabled, over the network. The command line tool is designed to be a very simple, yet very powerful tool to manage all your containers. It can handle connect to multiple container hosts and easily give you an overview of all the containers on your network, let you create some more where you want them and even move them around while they're running.

Leverage LXC/LXD with KubernetesLin Sun

Containerized Delivery on the Microsoft StackCornell Knulst

This document discusses containerized application delivery on the Microsoft stack. It provides an introduction to containers and their advantages over traditional virtual machines. It then discusses the differences between Linux containers and the two types of Windows containers - Windows Server containers and Hyper-V containers. The document demonstrates how to set up and use containers on Windows and the container support in Visual Studio 2017 and Visual Studio Code. It also discusses Azure Container Service and provides some tips for containerized workflows.

Release Management with Docker - Dutch Microsoft ALM GroupCornell Knulst

This document provides an overview of containers and how to use Docker for release management. It discusses the benefits of containers over virtual machines in terms of speed, costs, standardization, and isolation. It then demonstrates how to use Docker and Windows Server containers to create a containerized delivery pipeline with Visual Studio Team Services for standardized and isolated deployments. Contact information is provided at the end for the company Xpirit that specializes in DevOps consulting.

Docker Introduction - DevOps Montreal MeetupColin Surprenant

Hello, Docker!Michael Kwesi Essandoh

This document provides an introduction to Docker and DevOps. It defines DevOps as combining software development and IT operations to shorten development cycles and deliver features quickly. Docker is described as using containers to decouple applications from operating systems, providing a lightweight virtualization alternative to VMs. Key Docker concepts are outlined like Dockerfiles, images, and registries. Guidelines are provided around keeping images small and being careful with databases in containers. Kubernetes is also mentioned as a popular container orchestration engine.

Lxd the proper way of runing containersMarian Marinov

This document discusses containers and LXD, which is a front-end for LXC Linux containers. It explains that containers provide benefits over virtual machines like higher density, faster startup times, and lower latency since they run processes on the same kernel. LXD makes it easier to manage LXC containers through its RESTful API, remote control, improved command line interface, and features for storage, networking, limits, and live migration. While LXD works out of the box on recent Ubuntu, installing it on other distributions like Debian and CentOS can be more difficult due to dependency requirements.

containerd and CRIDocker, Inc.

PostgreSQL Setup Using DockerGilt Tech Talks

Containarized Gluster Storage in KubernetesNeependra Khare

This document discusses using GlusterFS storage in Kubernetes. It begins with an overview of GlusterFS as a scale-out distributed file system and its interfaces. It then covers Kubernetes storage concepts like StorageClasses, PersistentVolumeClaims (PVC), and PersistentVolumes (PV). It explains that StorageClasses define storage, PVC requests storage and creates a PV, and the PV provides actual mounted storage. It also demonstrates these concepts and shows the workflow of dynamically provisioning GlusterFS volumes in Kubernetes.

LXD: The hypervisor that isn'ttych0

LXD is a system container manager that uses Linux containers (LXC) to provide operating-system-level virtualization. It is secure by default using features like user namespaces, cgroups, and AppArmor. LXD includes a REST API for managing containers, a daemon, and a framework for managing container images. It can perform some hypervisor functions but is not intended as a network, storage, or application container manager.

OpenVZ, Virtuozzo and DockerKirill Kolyshkin

The OpenVZ/Virtuozzo developers from Odin (ex Parallels) have been working on Linux container technologies since 1999. What was originally a separate patchset is now mostly merged into the upstream Linux kernel, enabling the way for projects like LXC and Docker. In the mean time, the OpenVZ/Virtuozzo Linux kernel is still one step ahead of the vanilla kernel when it comes to containers. The talk will provide details about recent efforts towards Docker and Virtuozzo interoperability. This development is twofold. The first goal is to run Docker inside an OpenVZ container and the second goal is to use the proven OpenVZ kernel as a backend for Docker (via libcontainer).

Docker Global Hack Day #3 Docker, Inc.

The next Docker Global Hack Day will run from Wednesday, September 16th through Monday, September 21st! The grand prize for each member of the winning hack team is a complimentary pass to attend DockerCon EU 2015 along with hotel accommodations during the conference and the opportunity to present their winning hack during the conference. As a team of 1-3 hackers, you will hack on a project using Docker or its infrastructure plumbing (runC, Notary) as a central piece. You will have exactly from 4pm PDT on Wednesday, September 16th to 9am PDT on Monday, September 21st to complete this project. This window includes the time to create all materials needed for your submission. Everyone will submit projects in one of three categories listed below: Docker Plugins Docker Plumbing – runC, Notary, etc. Docker Freestyle – must use features from the latest Docker releases including Engine and other Docker OSS projects

Libcontainer: joining forces under one roofAndrey Vagin

Libcontainer is a project that aims to create a common library for container management across different technologies like Docker and LXC. It avoids external dependencies and supports multiple container types through a common API. The goal is to allow cooperation and code reuse across projects through a shared container management library. Libct is a companion C library that provides a frontend API for managing the entire container lifecycle.

Gluster and KubernetesGluster.org

GlusterFS can be used with Kubernetes in several ways: 1) As a volume driver to provide persistent storage and shared access to data across containers using existing GlusterFS volumes. 2) Through local volumes which use hostPath provisioning to leverage GlusterFS mounts but are not suitable for production. 3) With Heketi which provides dynamic provisioning of GlusterFS volumes through a REST API and integration with Kubernetes. 4) Potentially through Rook which aims to integrate storage services like Ceph and GlusterFS to provide turnkey storage and currently supports Ceph.

Storage in kubernetesPeeyush Gupta

This document discusses storage in Kubernetes. It covers stateless vs stateful containers, volumes, dynamic provisioning, PVCs, PVs and storage classes. It introduces flex volume drivers which allow mounting vendor volumes by installing the vendor's driver on nodes. The Container Storage Interface is presented as an industry standard storage interface that is out-of-tree, containerized and deployed via standard Kubernetes primitives to provide storage for Kubernetes as well as other platforms like Mesos and Cloud Foundry. It follows a standard workflow with PVCs, PVs and storage classes.

Understanding LXC & DockerComprinno Technologies

Docker. General overviewMirantis IT Russia

The document summarizes a Docker meetup event being organized in Moscow on February 26, 2015. It provides details on why the meetup is being held, including for informal technical discussions on Docker and as an event partnered with Openstack.ru. An overview of Docker is given, explaining how it automates application deployment as lightweight portable containers that can run anywhere. Key Docker concepts like images, registries, and containers are also summarized.

An introduction to contianers and Docker for PHP developersRobert McFrazier

This document provides an introduction to containers and Docker for PHP developers. It defines Linux containers and their key components like namespaces and control groups. It explains that Docker is a container technology that packages applications and dependencies into standardized units. Docker Compose is introduced as a tool to define and run multi-container applications with Docker. Vagrant is described as a way to provide a Linux Docker host and shared folders. The document concludes by noting Docker's focus on container deployment and providing references for further information.

Linux based StubdomainsThe Linux Foundation

As the current stubdomain based on minios is difficult to maintain, we have worked on a stubdomain based on Linux. This helps to use QEMU upsteam in the stubdom with little change. So first I will present how a Linux based stubdomain is built and lauched, and the difficulties around it. Then, to see if this is a viable option, I will show disk and network benchmarks to compare it with a traditional QEMU in dom0 configuration. To finish, I will present the current limitations of this type of stubdomains.

Linux VirtualizationOpenVZ

Virtualization creates an abstraction layer between physical hardware and the software that uses it. OpenVZ is an OS-level virtualization technology that partitions a physical Linux server's resources to run multiple isolated Linux systems. It provides high density and performance by running guest operating systems within the same kernel as the host. OpenVZ uses kernel features and tools to isolate guest environments, manage shared resources, and easily provision and migrate virtual private servers.

Docker 101 for "The Core of Microservice Architecture"enyert

Docker is a tool that allows applications to run in isolated containers to make them lightweight, portable and able to run anywhere. It uses containers as a method of operating system-level virtualization which isolate Linux systems from each other on a single host. The Docker architecture includes images, containers, the Docker engine and a registry. Containers are ephemeral and any persistent data needs to be mapped to external volumes. A hands-on demo is provided to illustrate Docker's use in launching microservices architectures with containers isolating individual services that can then be independently scaled.

Academy PRO: Docker. Part 1Binary Studio

This document provides an agenda for a Docker Academy PRO course. It introduces containers and containerization basics. It discusses how Docker works and the evolution of IT that led to its development. It compares containers to virtual machines and the advantages of containers. Key Docker concepts are explained like images, the Docker daemon, and official Docker images. The document concludes by asking if there are any questions.

Docker - Portable Deploymentjavaonfly

Docker is a system for running applications in lightweight containers that can be deployed across machines. It allows developers to package applications with all dependencies into standardized units for software development. Docker eliminates inconsistencies in environments and allows applications to be easily deployed on virtual machines, physical servers, public clouds, private clouds, and developer laptops through the use of containers.

Microservices , Docker , CI/CD , Kubernetes Seminar - Sri Lanka Mario Ishara Fernando

This document discusses microservices and containers. It provides an overview of microservices architecture compared to monolithic architecture, highlighting that microservices are composed of many small, independent services with separate deployments and databases. It then discusses containers and how Docker is used to package and run applications in isolated containers. Finally, it introduces Kubernetes as a container orchestration system to manage and scale multiple containerized applications across a cluster of machines.

Evolution of containers to kubernetesKrishna-Kumar

Kubernetes is an open-source system for automating deployment, scaling, and management of containerized applications. It was originally developed by Google based on years of experience running production workloads at scale. Kubernetes groups containers into logical units called pods and handles tasks like scheduling, health checking, scaling and rollbacks. The main components include a master node that manages the cluster and worker nodes that run application containers scheduled by the master.

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Academy PRO: Docker. Lecture 1

1. Docker Academy PRO

2. Course’s Agenda Introduction to Docker Containerization Basics Orchestration Basics Miscellaneous

3. Today’s Agenda What is containers? Challenges & Solutions How it works?

4. What is Docker? Docker is an open platform that helps companies build, ship and run their applications everywhere.

5. Evolution of IT Earlier Thick client Well defined stack Monolith infrastructure Today Thin client Many different services Running on different set of resources

6. Static website UserDB API Web Frontend Queue Redis + Redis-sentinel Node.js + Express + Mongoose MongoDB Webpack + React + Redux nginx + bootstrap Development VM QA server Public cluster Production server Contributors laptop Customer datacenter

7. Cargo transport pre 1960

8. Matrix from hell

9. Solution

10. Linux Container (LXC)

11. cgroups - Linux kernel feature that limits, accounts for, and isolates the resource usage (CPU, memory, disk I/O, network, etc.) of a collection of processes. namespaces - feature of the Linux kernel that isolates and virtualizes system resources of a collection of processes (pid, mnt, net..) Linux Containers - operating-system-level virtualization method for running multiple isolated Linux systems (containers) on a control host using a single Linux kernel. LXC combines the kernel's cgroups and support for isolated namespaces to provide an isolated environment for applications.

12. High level approach: lightweight VM own process space own network interface can run stuff as root can have own sbin/init

13. Low level approach: chroot on steroids can also not have its own sbin/init container = isolated process(es) share kernel with host no device emulation

14. Separation of concerns Inside: code libs package manager app data Outside: logging remote access network configuration monitoring

15. Build once - run everywhere! Linux containers is units of software development run everywhere regardless of kernel version regardless of host distro BUT container and host architecture must match run anything if you can run it on host - you can run in the container

16. VMs vs Containers

17. Virtualization Advantages: Multiple OS on same machine Easy maintenance and recovery Lower total cost of ownership Disadvantages: Multiple VMs Lead to Unstable performance

18. Containerization Advantages over virtualization: Containers on same OS kernel are lighter and smaller Better resource utilization Short boot-up process

19. Resource/Memory Utilization 16Gb 3Gb 2Gb 1Gb 4Gb 4Gb2Gb 16Gb 3Gb 4Gb 2Gb VM Containers 7 Gb of Memory blocked and cannot be used for new VMs

21. Containerd - industry-standard container runtime with an emphasis on simplicity, robustness and portability. It is available as a daemon for Linux and Windows, which can manage the complete container lifecycle of its host system: image transfer and storage, container execution and supervision, low- level storage and network attachments, etc.. runC - CLI tool for spawning and running containers according to the OCI (Open Container Initiative) specification.

22. What is Docker? #2 Docker is containerization platform which packages your application and all its dependencies together in the form of containers so as to ensure that your application works in the same way in any environment be it Development or Test or Production

23. Why Docker? Isolation Lightweight Simplicity Workflow Community

24. Community

25. Community

26. Docker Adoption

27. Docker Adoption

28. Docker Adoption

29. Official Docker Images https://hub.docker.com/explore/?page=1

30. Hello World! $ docker run hello-world

31. Any questions?

32. The end for today :)