containerization using docker
TRANSCRIPT
Containerization using DockerVinod Doshi-- Sr. Manager QA & DevOps, Synerzip Softech India Pvt Ltd.-- Email : [email protected], [email protected] Twitter handle : https://twitter.com/vinodkdoshi-- Linkedin profile : https://in.linkedin.com/in/vinoddoshi
Sumit Ramteke-- Senior Full Stack Developer, Synerzip Softech India Pvt Ltd.-- Email : [email protected],[email protected] Linkedin profile : https://www.linkedin.com/in/sumitramteke
Agenda
● VM’s , IAAS , PAAS and DevOps● Containers vs Virtual Machines● Container architecture and Micro Services● Docker features and Docker ecosystem● CI using Docker● Docker security considerations● Container Orchestration
Virtualization
IAAS and PAAS
CODE REVIEWSAPPLICATION SERVERS CODE COVERAGE
DEPLOYMENT
MONITORING BUILD TOOLS
CLOUD
SOURCE CODE
WEB SERVERS
CONTINUOUS INTEGRATION
LOGGING
RDBMS
NOSQL
ARTIFACTORYCONFIGURATION
MANAGEMENT
CACHING
VIRTUALIZATION
ISSUE MANAGEMENT
CONTAINERIZATION
Containers vs VM’s
Containers
● Run in user space● Have an isolated user space● OS architecture is shared ● Only parts created are bins/libs● Lightweight compared to VM’s
Docker
● Open source project ● Linux namespaces & control groups● Union File System ● Lightweight and fast● Usability● Easy to Modularize apps● Easy to scale apps● Dockerhub as central repository
Micro services
Why Micro Services
● Service oriented architecture● Loosely coupled, Tightly aligned● High Developer productivity● Regressions easy to find, correct● Releases have zero overhead● Rapid iteration using real consumer metrics● Very less overhead in doing a new release● Continuous Delivery
Containerization Technologies
● CoreOS, Rocket● Docker● Redhat containers● AWS PAAS● GCE PAAS● AWS Lambda
Docker setup
● Ubuntu○ Installation using apt-get○ 1.12 aws images on beta signup
● Windows○ Docker Toolbox○ Docker 1.12
● Mac○ Docker Toolbox○ Docker 1.12
Dockerhub
● Dockerhub● Public repository● Private repository● Official images● User submitted images● Private docker infrastructure
Docker images
● What is a docker image● Creating a container from an image● Listing images● Removing images● Removing images● Searching docker images
Docker containers
● Docker hello world● Launching container as daemon● Listing containers● Logging into container● Docker start, stop● Docker pause, unpause● Docker inspect● Deleting container
Docker resource allocation
● -m, --memory=""● --memory-swap=""● --cpuset-cpus=""● -c, --cpu-shares
Docker layers
● List of read-only layers ● Layers have file system differences● New Container adds thin, writable layer
Building images
● Modifying containers● Creating an image● Registering an image
Docker file
● Structure of Docker file● Example Docker file● Building image using a Docker file● Docker file instructions
○ From, Maintainer, Copy○ Add, Env, User, Workdir○ Volume, Expose, Run○ Cmd, Entrypoint, Onbuild
Docker Networking
● Container ip address● Port mapping● Binding to specific ip address● Auto-generating host port
Linking containers
● --link option● Exporting variables● Enabling networking
Sharing data
● Containers are temporal● Data volumes● Sharing host data● Data only containers● Data volumes from other containers
Docker compose
● Multi container application● Installing Docker compose● Structure of compose file● Define logical application● Docker-compose.yml file● Docker-compose command● Launching multi-container app
Debugging containerized applications
● exec● ps● top● stats● logs● Inspect
CI and deployment using Jenkins
● Using Jenkins for CI● Docker plugins● ssh build and deployment
Securing Docker containers
● VM vs Docker containers● Resource Isolation● Cgroups● Non root user● A trusted repository of software● Filesystems need to be read-only● Copy on write● Security-Enhanced Linux
Orchestration
● Running containers on a cluster● High availability● Load balancing and Auto scaling● Mesos, Marathon (Apache project)● Docker Swarm (native Docker v 1.12 )● GCE Kubernetes PAAS (Google project)● AWS ECS PAAS ● AWS containers on Beanstalk PAAS
Amazon EC2 Container Service (ECS)
Manage and Deploy Docker containers at Scale
ECS: Awesome Features
● Docker Compatibility
● Managed Clusters
● Task Definitions
● Programmatic Control
● Scheduling
● Container Deployments
● Local Development
● Monitoring
● Logging
● Repository Support
ECS: Example
Docker Swarm: A Native Cluster
App Architecture
Swarm Cluster Architecture
Final Result
Mesos, Marathon
● Apache project● https://mesosphere.github.io/marathon/● http://mesos.apache.org ● Container orchestration platform
Mesos Master, Mesos Slave, Zookeeper
Mesos, Marathon cluster Demo
● Setup on a VM● Mesos Master dashboard● Marathon dashboard● Launching a hello world job● HA, Auto scaling
Thank YouVinod Doshi
● Email:[email protected] ● Twitter:@vinodkdoshi● Linkedin:https://in.linkedin.
com/in/vinoddoshi
Sumit Ramteke● Email:[email protected] ● Linkedin:https://www.linkedin.
com/in/sumitramteke