{"id":1158,"date":"2019-01-21T15:40:51","date_gmt":"2019-01-21T15:40:51","guid":{"rendered":"https:\/\/www.cloudnowtech.com\/blog\/?p=1158"},"modified":"2021-10-18T15:35:20","modified_gmt":"2021-10-18T10:05:20","slug":"monolithic-to-microservices-why-and-how","status":"publish","type":"post","link":"https:\/\/www.cloudnowtech.com\/blog\/monolithic-to-microservices-why-and-how\/","title":{"rendered":"Monolithic to Microservices: Why and How"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">One of the major shifts in the approach to software development is the move from monolithic, single-block applications to highly granular microservices based applications. This fundamental transformation in the way software is built does bring with it many benefits, but it does pose some challenges as well. <\/span><\/p>\n<p><span style=\"font-weight: 400;\">Therefore, before getting into the details of how the move from monolithic to microservices can be made, I would like to first share a basic understanding of the concepts of Monolithic Applications and Microservices Applications built on SOA, and their comparative advantages and disadvantages.<\/span><\/p>\n<h3><b>Monolithic Applications<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Monolithic Applications, as their name suggests, refers to a \u2018very\u00a0<\/span><span style=\"font-weight: 400;\">large<\/span><span style=\"font-weight: 400;\">,\u00a0<\/span><span style=\"font-weight: 400;\">united<\/span><span style=\"font-weight: 400;\">, and\u00a0<\/span><span style=\"font-weight: 400;\">difficult<\/span><span style=\"font-weight: 400;\">\u00a0to\u00a0<\/span><span style=\"font-weight: 400;\">change<\/span><span style=\"font-weight: 400;\">\u2019 application artifact.<\/span><\/p>\n<p><b>Pros<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Requires only single artifact deployment, meaning just one artifact file needs to be copied to the deployment environment<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Enables easy automation testing on the single app artifact<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Makes horizontal scaling possible by running the copies of artifacts on different nodes behind the load balancer<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Continues to be the architecture used for a large set of applications even in recent years<\/span><\/li>\n<\/ul>\n<p><b>Cons<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Requires time to \u00a0understand the code and work on bug fixes and enhancements in medium and larger applications<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Takes longer application startup time since all the different components and their dependencies need to be started<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Makes adopting the latest security frameworks difficult as it may lead to huge effort and cost<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Requires testing of the whole application even for smaller enhancements or bug fixes to confirm the stability of the build<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Affects functioning of the whole application even in case of a memory leak in one component<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Makes management of applications very difficult from a CI and CD perspective, as even a smaller enhancement or bug fix takes a large amount of deployment process time<\/span><\/li>\n<\/ul>\n<h3><b>Microservices Applications<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Microservices Applications make use of small, independent artifacts that run in their own deployment environment and can communicate with other artifacts of the application to deliver the required features to the end user.<\/span><\/p>\n<p><b>Pros<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Decouples the large code base into smaller code bases so that maintainability of the code is easy for the project teams &#8211; this allows each team to focus on the development and maintenance of their service component, and brings in better agility in the development process<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Enables faster startup and response times as the components are deployed independently and run in their own space<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Delivers independence of framework and language from that used by other microservices of the project &#8211; so, the team can choose framework and language based on the need of their own microservice<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Ensures that even in the case of failure of one microservice, the whole application is not brought down, as the other microservices continue to run and serve requests &#8211; so the microservice that failed can be fixed and re-deployed<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Suited the DevOps cycle perfectly<\/span><\/li>\n<\/ul>\n<p><b>Cons<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Requires careful analysis while implementing changes in functional requirements that affect multiple services<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Poses challenges in testing of inter-dependent services if the design was not done correctly<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Requires high-level automation for microservices integration, deployment and monitoring process<\/span><\/li>\n<\/ul>\n<h3><b>Moving from Monolithic to Microservices architecture<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Given its numerous inherent advantages, the move from <a href=\"https:\/\/www.cloudnowtech.com\/technology.html\">Monolithic to Microservices<\/a> architecture is now all but inevitable. In a nutshell, at most times, building a medium or larger application involves complexity. Adopting Microservices Architecture with better planning and design can help to reduce this complexity.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1160\" src=\"https:\/\/i0.wp.com\/www.cloudnowtech.com\/blog\/wp-content\/uploads\/2019\/01\/micro-monolithic-services.png?resize=1200%2C804&#038;ssl=1\" alt=\"Micro Vs Monolithic Services\" width=\"1200\" height=\"804\" data-recalc-dims=\"1\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3><b>CloudNow\u2019s Approach<\/b><\/h3>\n<p><b>Step 1<\/b><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1161\" src=\"https:\/\/i0.wp.com\/www.cloudnowtech.com\/blog\/wp-content\/uploads\/2019\/01\/understanding-document.jpg?resize=1200%2C327&#038;ssl=1\" alt=\"understanding document\" width=\"1200\" height=\"327\" data-recalc-dims=\"1\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><b>Step 2<\/b><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1162\" src=\"https:\/\/i2.wp.com\/www.cloudnowtech.com\/blog\/wp-content\/uploads\/2019\/01\/project-sign-off.jpg?resize=1200%2C363&#038;ssl=1\" alt=\"project sign off\" width=\"1200\" height=\"363\" data-recalc-dims=\"1\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Note: The technical design <\/span><span style=\"font-weight: 400;\">document covers the following details:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Intercommunication of existing monolithic app modules<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Dataflow, boundaries and application context<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Existing deployment architecture<\/span><\/li>\n<\/ul>\n<p><b>Step 3<\/b><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1164 size-full\" src=\"https:\/\/i0.wp.com\/www.cloudnowtech.com\/blog\/wp-content\/uploads\/2019\/01\/deployment.jpg?resize=1200%2C415&#038;ssl=1\" alt=\"Deployment\" width=\"1200\" height=\"415\" data-recalc-dims=\"1\" \/><\/p>\n<p><i><span style=\"font-weight: 400;\">CloudNow can help you with the migration of your monolithic applications to a microservices platform. <a href=\"https:\/\/www.cloudnowtech.com\/contact-us.html\">Get in touch with us today<\/a> to see how your application development processes can benefit from our expertise.<\/span><\/i><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the major shifts in the approach to software development is the move from monolithic, single-block applications to highly granular microservices based applications. This fundamental transformation in the way software is built does bring with it many benefits, but it does pose some challenges as well. Therefore, before getting into the details of how [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":2460,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[279,30],"tags":[101,214],"class_list":["post-1158","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cloud","category-cloud-migration","tag-cloud-migration-solutions","tag-mircoservices"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Monolithic to Microservices: Why and How - Discover Better Value Faster<\/title>\n<meta name=\"description\" content=\"One of the major shifts in the approach to software development is the move from monolithic, single-block applications to highly granular microservices based applications. 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