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Når du driver med kontinuerlig leveranse er det et problem om du har nedetid hver gang du produksjonssetter når målet er å produksjonssette så ofte du kan. I denne lyntalen vil jeg vise hvordan du kan unngå nedetid når du deployer Java-web-applikasjoner. Jeg vil vise hvordan du kan deploye (og rulle tilbake) nye versjoner, og også hvordan du bør håndtere databaseendringer (og rollback) mellom deployments.

Du kan ikke levere kontinuerlig om du har nedetid

Stein Inge Morisbak

My talk from DevOpsCon Berlin 2016. Ansible is a radically simple and lightweight provisioning framework which makes your servers and applications easier to provision and deploy. By orchestrating your application deployments you gain benefits such as documentation as code, testability, continuous integration, version control, refactoring, automation and autonomy of your deployment routines, server and application configuration. Ansible uses a language that approaches plain English, uses SSH and has no agents to install on remote systems. It is the simplest way to automate and orchestrate application deployment, configuration management and continuous delivery. In this tutorial you will be given an introduction to Ansible and learn how to provision Linux servers with a web-proxy, a database and some other packages. Furthermore we will automate zero downtime deployment of a Java application to a load balanced environment.

Zero Downtime Deployment with Ansible

Stein Inge Morisbak

Getting software released to users can be risky, time-consuming and painful. The solution is the ability to deliver reliable software continuously through build, test and deployment automation, and through improved collaboration between developers, testers and operations. In this tutorial we will present principles and technical practices that enable teams to incrementally deliver software of high quality and value into production whenever they want, and extremely fast. The size of the project or the complexity of its code base does not matter. In the first half of the tutorial we will introduce the concepts of continuous delivery, through continuous integration; and automation of the build, test and deployment process. We will also go through som basic principles and patterns for building automatable applications (architecture). We will cover experiences on team collaboration patterns and lastly; techniques for solving tasks such as an easy and comprehendible version control strategy. The second half of the tutorial we will be working with automated provisioning of agile infrastructure, including the use of tools (puppet) to automate the management of testing and production environments. We will go through some scripting lessons examplifying how to implement zero-downtime deploys (… and rollback – if something goes wrong!), with examples in both bash and Ruby. Along with controlling the start, stop, restart lifecycles during deploys, we will also show some simple techniques for backups, logging, error handling, monitoring and verification of application health that can make the automation more robust. We will also use servers "in the cloud" to demonstrate different techniques, and we hope to make it a fun day and to deliver software (examples) several times throughout the workshop. Required knowledge: Agile/Lean basics, Linux basics, version control basics, maven basics.

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Både store og små prosjekter forventes å bli ferdige på en eller annen dato. Det er ikke bare størrelsen som er problemet. Det er selve arbeidsformen. Prosjekt skaper konflikt mellom prosjektmål og virksomhetens mål, stor avstand mellom prosjekt- og linjeorganisasjon, en kortsiktig finansieringsmodell og utfordringer med overlevering og kunnskapsoverføring. Å behandle leveransene som kontinuerlige produktutviklingsløp i linja gjør det enklere å realisere gevinster kontinuerlig, justere initiativene opp mot virksomhetens mål, involvere hele organisasjonen, løpende finansiering, bedre kommunikasjon og kunnskapsbygging istedenfor kunnskapsoverlevering.

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