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<!DOCTYPE html>
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<meta name="description" content="Microservices are an architecture where independent, functionality-contained programs communicate via network calls.">
<title>Microservices - Full Stack Python</title>
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<h1>Microservices</h1>
<p>Microservices are an application architecture style where independent,
self-contained programs with a single purpose each can communicate with
each other over a network. Typically, these microservices are able to be
deployed independently because they have strong separation of
responsibilities via a well-defined specification with significant
backwards compatibility to avoid sudden dependency breakage.</p>
<h2>Why are microservices getting so much buzz?</h2>
<p>Microservices follow in a long trend of software architecture patterns
that become all the rage. Previously,
<a href="https://en.wikipedia.org/wiki/Common_Object_Request_Broker_Architecture">CORBA</a>
and (mostly XML-based) service-oriented architectures (SOA) were the
hip buzzword among
<a href="http://www.igloocoder.com/2271/ivory-tower-architect">ivory tower architects</a>.</p>
<p>However, microservices have more substance because they are typically based
on <a href="/application-programming-interfaces.html">RESTful APIs</a> that are far
easier for actual software developers to use compared with the previous
complicated XML-based schemas thrown around by enterprise software companies.
In addition, successful applications begin with a monolith-first approach using
a single, shared application codebase and deployment. Only after the application
proves its usefulness is it then broken down into microservice components to
ease further development and deployment. This approach is called the
"monolith-first" or
"<a href="http://martinfowler.com/bliki/MonolithFirst.html">MonolithFirst</a>" pattern.</p>
<h3>Microservice resources</h3>
<ul>
<li>
<p>Martin Fowler's
<a href="http://martinfowler.com/articles/microservices.html">microservices</a>
article is one of the best in-depth explanations for what microservices are
and why to consider them as an architectural pattern.</p>
</li>
<li>
<p><a href="http://dev.otto.de/2016/03/20/why-microservices/">Why microservices?</a>
presents some of the advantages, such as the dramatically increased number
of deployments per day, that a well-done microservices architecture can
provide in the right situation. Many organizational environments won't
allow this level of flexibility but if yours is one that will, it's worth
considering these points.</p>
</li>
<li>
<p><a href="http://dev.otto.de/2015/09/30/on-monoliths-and-microservices/">On monoliths and microservices</a>
provides some advice on using microservices in a fairly early stage of
a software project's lifecycle.</p>
</li>
<li>
<p><a href="http://www.skybert.net/python/developing-a-restful-micro-service-in-python/">Developing a RESTful microservice in Python</a>
is a good story of how an aging Java project was replaced with a
microservice built with Python and Flask.</p>
</li>
<li>
<p><a href="http://technologyconversations.com/2015/11/10/microservices-the-essential-practices/">Microservices: The essential practices</a>
first goes over what a monolith application looks like then dives into what
operations you need to support potential microservices. For example, you really
need to have continuous integration and deployment already set up. This is a
good high-level overview of the topics many developers aren't aware of when they
embark on converting a monolith to microservices.</p>
</li>
<li>
<p><a href="https://hagbarddenstore.se/posts/2016-03-11/using-nginx-to-load-balance-microservices/">Using Nginx to Load Balance Microservices</a>
explains how an Nginx instance can use configuration values from etcd
updated by confd as the values are modified. This setup can be useful for
load balancing microservices as the backend services are brought up
and taken down.</p>
</li>
<li>
<p><a href="http://thenewstack.io/microservices-changed-matter/">How Microservices have changed and why they matter</a>
is a high level overview of the topic with some quotes from
various developers around the industry.</p>
</li>
<li>
<p><a href="http://blog.codeship.com/the-state-of-microservices-today/">The State of Microservices Today</a>
provides some general trends and broad data showing the increasing
popularity of microservices heading into 2016. This is more of an
overview of the term than a tutorial but useful context for both
developers and non-developers.</p>
</li>
<li>
<p><a href="http://jonasboner.com/bla-bla-microservices-bla-bla/">bla bla microservices bla bla</a>
is a transcript for a killer talk on microservices that breaks down the
important first principles of distributed systems, including asynchronous
communication, isolation, autonomicity, single responsibility,
exclusive state, and mobility. The slides along with the accompanying
text go into how reality gets messy and how to embrace the constraints
inherent in distributed systems.</p>
</li>
</ul>
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<a href="/introduction.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>1. Introduction</a><a href="/learning-programming.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Learning Programming</a><a href="/why-use-python.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Why Use Python?</a><a href="/python-2-or-3.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Python 2 or 3?</a><a href="/enterprise-python.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Enterprise Python</a><a href="/python-community.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Python Community</a><a href="/best-python-resources.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Best Python Resources</a><a href="/best-python-videos.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Best Python Videos</a><a href="/best-python-podcasts.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Best Python Podcasts</a><a href="/development-environments.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>2. 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Core Language</a><a href="/generators.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Generators</a><a href="/comprehensions.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Comprehensions</a><a href="/testing.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>4. Testing</a><a href="/unit-testing.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Unit Testing</a><a href="/integration-testing.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Integration Testing</a><a href="/code-metrics.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Code Metrics</a><a href="/debugging.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Debugging</a><a href="/logging.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Logging</a><a href="/web-application-security.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>6. Security</a><a href="/web-development.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>7. Web Development</a><a href="/web-frameworks.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Web Frameworks</a><a href="/django.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Django</a><a href="/flask.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Flask</a><a href="/bottle.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Bottle</a><a href="/pyramid.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Pyramid</a><a href="/morepath.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Morepath</a><a href="/other-web-frameworks.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Other Web Frameworks</a><a href="/template-engines.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Template Engines</a><a href="/jinja2.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Jinja2</a><a href="/web-design.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Web Design</a><a href="/cascading-style-sheets.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Cascading Style Sheets (CSS)</a><a href="/javascript.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>JavaScript</a><a href="/task-queues.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Task Queues</a><a href="/microservices.html" class="list-group-item smaller-item active" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Microservices</a><a href="/static-site-generator.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Static Site Generators</a><a href="/pelican.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Pelican</a><a href="/lektor.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Lektor</a><a href="/websockets.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>WebSockets</a><a href="/deployment.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>8. Deployment</a><a href="/servers.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Servers</a><a href="/static-content.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Static Content</a><a href="/platform-as-a-service.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Platform-as-a-Service</a><a href="/operating-systems.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Operating Systems</a><a href="/ubuntu.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Ubuntu</a><a href="/web-servers.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Web Servers</a><a href="/apache-http-server.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Apache HTTP Server</a><a href="/nginx.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Nginx</a><a href="/caddy.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Caddy</a><a href="/wsgi-servers.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>WSGI Servers</a><a href="/green-unicorn-gunicorn.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Green Unicorn (Gunicorn)</a><a href="/continuous-integration.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Continuous Integration</a><a href="/configuration-management.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Configuration Management</a><a href="/docker.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Docker</a><a href="/data.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>9. Data</a><a href="/databases.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Relational Databases</a><a href="/postgresql.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>PostgreSQL</a><a href="/mysql.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>MySQL</a><a href="/sqlite.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>SQLite</a><a href="/object-relational-mappers-orms.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Object-relational Mappers</a><a href="/sqlalchemy.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>SQLAlchemy</a><a href="/peewee.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>Peewee</a><a href="/no-sql-datastore.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:27px'>NoSQL Data Stores</a><a href="/application-programming-interfaces.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>10. Web APIs</a><a href="/bots.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>Bots</a><a href="/api-creation.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>API Creation</a><a href="/api-integration.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>API Integration</a><a href="/twilio.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>Twilio</a><a href="/devops.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>11. DevOps</a><a href="/monitoring.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>Monitoring</a><a href="/caching.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>Caching</a><a href="/web-analytics.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>Web Analytics</a><a href="/change-log.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif;'>12. Change Log</a><a href="/what-full-stack-means.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>What Full Stack Means</a><a href="/about-author.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>About the Author</a><a href="/future-directions.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",sans-serif; padding-left:35px'>Future Directions</a> <a href="/table-of-contents.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",san-serif;background-color:#22B24C; color: #fff;'>...or <span style="border-bottom: 1px dotted;">view the full table of contents</span>.</a>
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<div class="panel-heading"><h3 class="panel-head">Microservices</h3></div>
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Major updates are tweeted via
<a href="https://twitter.com/fullstackpython">@fullstackpython</a>.
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Need more detailed tutorials than you see here?
<a href="http://www.deploypython.com/">Learn more about The Full Stack Python Guide to Deployments book.</a>
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<h3 class="panel-head"><a href="/table-of-contents.html" style="color: #fff;">Chapters</a></h3>
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<a href="/introduction.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>1. Introduction</a><a href="/development-environments.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>2. Development Environments</a><a href="/python-programming-language.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>3. Core Language</a><a href="/testing.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>4. Testing</a><a href="/web-application-security.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>6. Security</a><a href="/web-development.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>7. Web Development</a> <a href="/microservices.html" class="list-group-item smaller-item active" style='font-family: "Helvetica Neue",sans-serif;'>» Microservices</a>
<a href="/deployment.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>8. Deployment</a><a href="/data.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>9. Data</a><a href="/application-programming-interfaces.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>10. Web APIs</a><a href="/devops.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>11. DevOps</a><a href="/change-log.html" class="list-group-item smaller-item " style='font-family: "Helvetica Neue",sans-serif;'>12. Change Log</a> <a href="/table-of-contents.html" class="list-group-item smaller-item" style='font-family: "Helvetica Neue",san-serif;background-color:#22B24C; color: #fff;'>...or <span style="border-bottom: 1px dotted;">view the full table of contents</span>.</a>
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<a href="https://github.com/mattmakai" class="underline">Matt Makai</a> 2016
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