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  12. <title>You're not going to do Microservices (archive) — David Larlet</title>
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  437. <h1>
  438. <span><a id="jumper" href="#jumpto" title="Un peu perdu ?">?</a></span>
  439. You're not going to do Microservices (archive)
  440. <time>Pour la pérennité des contenus liés. Non-indexé, retrait sur simple email.</time>
  441. </h1>
  442. <section>
  443. <article>
  444. <h3><a href="http://blog.christianposta.com/microservices/youre-not-going-to-do-microservices/">Source originale du contenu</a></h3>
  445. <p>Seems like every 5 to 10 years our industry, especially in the Enterprise Integration, or enterprise application space, we get introduced to some new methodology or architectural style that's the best since sliced bread and will make you 10x more productive and make your enterprise more agile, flexible, able to respond to change, and whatever else that CIOs are willing to spend gobs of money on. We've seen Enterprise Application Integration, Web Services, SOA, Component based architectures, ESBs, and on and on.</p>
  446. <p>Today: Microservices</p>
  447. <p>Well, guess what: chances are you're not going to get microservices architecture right.</p>
  448. <p>Honestly, I'm not saying that to dump cold water on your burning desire to try out new things. I do think there is legitimacy to microservices and it's an approach that grew organically over the years of watching failed committee-driven implementations. But guess what? There is a foundation of pre-requisites that must be in place first beforehand to be successful with this architecture (or any architecture :) ) that, based on my observation, is lacking at more places than it's prevailing. By all means, fire up Spring Boot or Dropwizard, or no container. <strong>You're not doing microservices just because you're following the lemmings away from the App Server</strong>. Places like Netflix, Amazon, etc seem to have some of the right combination of pre-requisites to make it work... But ask your VPs of engineering, ask your Directors of computing what they would say if their internal teams were organized like Amazon. They would spoil their pants. Your company probably doesn't and probably won't get microservices right.</p>
  449. <h2>Most organizations are not structured for microservices</h2>
  450. <p>We all hear about Conway's law, but this fact is the strongest reason why you're not going to do microservices. People win. Culture wins. Paper processes and paper structure does not win. If you have a UI team, DB team, "services" team, each specializing in its own right, you'll end up with systems that look like those tiers. There's nothing wrong with that per-se. But a tree-like structure and layers of managers above technological-grouped teams is an impediment to microservices-based teams.</p>
  451. <h2>REST is not a silver bullet</h2>
  452. <p>REST is great! I like the concepts, and that for enterprises it's basically the HTTP implementation we talk about. I'm happy to get away from SOAP. HTTP and REST is understood, has great tools, networking equipment, proxies, etc are all built with it in mind...But <a href="http://getprismatic.com/story/1422136825657?share=NDAwMA.MTQyMjEzNjgyNTY1Nw.NT_Zo31VQdZtIqi1ml9HAZdWsgE">REST is not a silver bullet</a>.</p>
  453. <h2>Modularizing applications is hard</h2>
  454. <p>How big should the service be? How deep should it be? Single responsibilities? Domain Driven Design bounded contexts, etc. This is all difficult to get right in practice. Doing it a few times and failing is the best (in my opinion) way to learn how to avoid the sharp edges, but properly modularizing your applications and your domain services is not easy.</p>
  455. <h2>We still don't understand how to do event-based architectures</h2>
  456. <p>Why are we still connecting everything by RPC!?!? This one aggravates me the most that we still don't know how to do Event driven architectures correctly, and that when a "new" architectural style comes about, we relive all of the same mistakes we did with the previous. BTW.... Microservices != REST.</p>
  457. <p>Alright, this was a bit of a complain session, but just wanted to bring some reality to the discussion around microservices.<br/>
  458. At the end of the day, isolating "services" or systems at the process level is still not really loose coupling or "decoupled" systems. Runtime coupling is still very much present and maybe even more so. Never mind that <a href="http://en.wikipedia.org/wiki/Fallacies_of_distributed_computing">the Fallacies of distributed computing</a> still hold true. So maybe when we re-invent architectural styles, we frame them within the lessons learned?</p>
  459. </article>
  460. </section>
  461. <nav id="jumpto">
  462. <p>
  463. <a href="/david/blog/">Accueil du blog</a> |
  464. <a href="http://blog.christianposta.com/microservices/youre-not-going-to-do-microservices/">Source originale</a> |
  465. <a href="/david/stream/2019/">Accueil du flux</a>
  466. </p>
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  470. <img src="/static/david/david-larlet-avatar.jpg" loading="lazy" class="avatar" width="200" height="200">
  471. <p>
  472. Bonjour/Hi!
  473. Je suis <a href="/david/" title="Profil public">David&nbsp;Larlet</a>, je vis actuellement à Montréal et j’alimente cet espace depuis 15 ans. <br>
  474. Si tu as apprécié cette lecture, n’hésite pas à poursuivre ton exploration. Par exemple via les <a href="/david/blog/" title="Expériences bienveillantes">réflexions bimestrielles</a>, la <a href="/david/stream/2019/" title="Pensées (dés)articulées">veille hebdomadaire</a> ou en t’abonnant au <a href="/david/log/" title="S’abonner aux publications via RSS">flux RSS</a> (<a href="/david/blog/2019/flux-rss/" title="Tiens c’est quoi un flux RSS ?">so 2005</a>).
  475. </p>
  476. <p>
  477. Je m’intéresse à la place que je peux avoir dans ce monde. En tant qu’humain, en tant que membre d’une famille et en tant qu’associé d’une coopérative. De temps en temps, je fais aussi des <a href="https://github.com/davidbgk" title="Principalement sur Github mais aussi ailleurs">trucs techniques</a>. Et encore plus rarement, <a href="/david/talks/" title="En ce moment je laisse plutôt la place aux autres">j’en parle</a>.
  478. </p>
  479. <p>
  480. Voici quelques articles choisis :
  481. <a href="/david/blog/2019/faire-equipe/" title="Accéder à l’article complet">Faire équipe</a>,
  482. <a href="/david/blog/2018/bivouac-automnal/" title="Accéder à l’article complet">Bivouac automnal</a>,
  483. <a href="/david/blog/2018/commodite-effondrement/" title="Accéder à l’article complet">Commodité et effondrement</a>,
  484. <a href="/david/blog/2017/donnees-communs/" title="Accéder à l’article complet">Des données aux communs</a>,
  485. <a href="/david/blog/2016/accompagner-enfant/" title="Accéder à l’article complet">Accompagner un enfant</a>,
  486. <a href="/david/blog/2016/senior-developer/" title="Accéder à l’article complet">Senior developer</a>,
  487. <a href="/david/blog/2016/illusion-sociale/" title="Accéder à l’article complet">L’illusion sociale</a>,
  488. <a href="/david/blog/2016/instantane-scopyleft/" title="Accéder à l’article complet">Instantané Scopyleft</a>,
  489. <a href="/david/blog/2016/enseigner-web/" title="Accéder à l’article complet">Enseigner le Web</a>,
  490. <a href="/david/blog/2016/simplicite-defaut/" title="Accéder à l’article complet">Simplicité par défaut</a>,
  491. <a href="/david/blog/2016/minimalisme-esthetique/" title="Accéder à l’article complet">Minimalisme et esthétique</a>,
  492. <a href="/david/blog/2014/un-web-omni-present/" title="Accéder à l’article complet">Un web omni-présent</a>,
  493. <a href="/david/blog/2014/manifeste-developpeur/" title="Accéder à l’article complet">Manifeste de développeur</a>,
  494. <a href="/david/blog/2013/confort-convivialite/" title="Accéder à l’article complet">Confort et convivialité</a>,
  495. <a href="/david/blog/2013/testament-numerique/" title="Accéder à l’article complet">Testament numérique</a>,
  496. et <a href="/david/blog/" title="Accéder aux archives">bien d’autres…</a>
  497. </p>
  498. <p>
  499. On peut <a href="mailto:david%40larlet.fr" title="Envoyer un courriel">échanger par courriel</a>. Si éventuellement tu souhaites que l’on travaille ensemble, tu devrais commencer par consulter le <a href="http://larlet.com">profil dédié à mon activité professionnelle</a> et/ou contacter directement <a href="http://scopyleft.fr/">scopyleft</a>, la <abbr title="Société coopérative et participative">SCOP</abbr> dont je fais partie depuis six ans. Je recommande au préalable de lire <a href="/david/blog/2018/cout-site/" title="Attention ce qui va suivre peut vous choquer">combien coûte un site</a> et pourquoi je suis plutôt favorable à une <a href="/david/pro/devis/" title="Discutons-en !">non-demande de devis</a>.
  500. </p>
  501. <p>
  502. Je ne traque pas ta navigation mais mon
  503. <abbr title="Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33.184162340">hébergeur</abbr>
  504. conserve des logs d’accès.
  505. </p>
  506. </div>
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