Docker team training
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Docker allows developers to package applications into standardized units called containers to improve portability, reduce costs, and increase deployment speed and agility. Containers isolate applications from other applications and infrastructure, allowing them to run anywhere regardless of the underlying infrastructure. With Docker, developers can build and test code in their local environments and then deploy the same container to production, reducing configuration mismatches between environments. Docker uses containerization and virtualization to package applications and their dependencies into lightweight, portable containers that can run on any infrastructure.
Docker team training
- 1. Docker WHAT IS IN IT FOR MY TEAM
- 2. Why do we need Docker? Developer/Test Concerns: Imagine time taken to request for new Desktop or OS upgrade Imagine setting up different OS environments for testing Imagine setting up variations of services, databases on these environments Business concerns: Power, Storage and equipment costs for the above % of utilization of the equipment setup % of time taken on Infra request, setup and configuration Docker Advantage: Agility: simplifies infra setup – lot of kits available Portability: Works here, definitely works there Security: Isolates from attacks/vulnerabilities Cost saving: Shared resources reduces investment and faster deployments reduces time/effort
- 3. What is Docker Docker – Build, Ship, and Run any App, Anywhere Old way – Development cycle 1. Develop applications in Dev environment (Identify OS/Networking requirements, configure dev environment) 2. Deploy in production environment 3. Refine the dev environment to match production environment Ex: install zlib 4. Re-deploy fixes, patches and releases 5. Repeat step 1 to 4 for each upgrade/migration/feature enhancement Docker way – Development cycle A. Build infrastructure and the app (Download docker container with dependencies) B. Validate with development configurations C. Deploy with production configurations Minimal tuning of Step A & B – post deployment
- 4. What are fundamentals of Docker Virtualization: Creation of multiple guest context on the physical computer Sharing of resources – Network, storage and compute Containerization Package software into std units for dev, shipment and deployment Micro Services Architectural pattern to maintain app(s) through multiple services instead of a single monolithic application
- 5. Where is Docker used? Docker is widely used within enterprises like Cisco, Technicolor For services such as Expedia, Paypal etc. For cloud dev on Amazon, Azure Two license types available Opensource: Docker Community Edition Suggested to use this for 9 out of 10 times Subscription: Docker Enterprise Edition Available on all platforms – Windows, Linux, Mac Available in different forms Docker service Docker toolbox (Legacy)
- 6. What are components of Docker?
- 7. How does Docker work? Docker Docker Engine – the container manager Docker CLI – client which interacts through REST APIs with the Docker engine Example commands: docker images docker ps docker-machine Tool to provision multiple Docker engines
- 8. How can one start using Docker Install Docker on your Ubuntu desktop (other OS also supported refer Get Docker section) Follow pre-requisites/commands in https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-docker-ce sudo apt-get install docker-ce Test your docker setup sudo docker run hello-world Need internet connection Sudo docker run –e “http_proxy=<http url:port>” hello-world Explore Dockerfile to build Docker images For example: Dockerfile to fetch centos and to copy scripts from local directory FROM centos RUN mkdir -p /bin/scripts COPY scripts /bin/scripts Execute: docker build . Explore docker-compose.yml to compose multiple images. Example of docker-compose.yml version: '3‘ services: app: build: ./ image: app:v4 couchdb_service: build: ./couchdb image: couchdb:v1.7 Execute docker-compose build or docker-compose build app
- 9. “ ” This reduces the risk of "worked in dev, now an ops problem. JAMES TURNBULL, THE DOCKER BOOK: CONTAINERIZATION IS THE NEW VIRTUALIZATION Thank You