As an example scenario: say you have . Since this was originally a directory (and not a library), our imports from it varied quite a bit. Right now, my company has an ecosystem set up where multiple Angular SPAs are deployed under a common domain. Specifically, we went from storing our notifications under an object called notices to storing them under notifications. it enabled us to spin . PowerShell Copy Get-ADFSProperties The property is ExtendedProtectionTokenCheck. Module Federation Access/Security Hi, I haven't seen much discussion related to security and access considerations when using Module Federation, so I thought I'd start one here. Enterprise security and module federation. Webpack 5 Module Federation aims to solve the sharing of modules in a distributed system, by shipping those critical shared pieces as macro or as micro as you would like. For us, this was evident in our application early on and it was not until we did a thorough performance analysis that we discovered the culprit. Give feedback. To solve this problem, we decided to use a unique identifier to identify the library version. In the last article we focused on sharing vendor code. You can use any of the plugins above to generate applications as well. Explore the source of a simple blog that utilizes the ContainerReferencePlugin to reference federated components from this website. If we were to investigate the network traffic before sharing anything, we would see that the code for this component is embedded in two separate files specific to both Host and Application 1 (the code specific to Host is shown below as an example). Lib 2). This key data is just several strings, hence you can load it from literally everywhere. This indicates that we are now sharing the code from @microfrontend-demo/design-system/components between the micro-apps. One of the powerful features of module federation is that all micro-apps are capable of being built independently. Module federation for the backend. If you are looking to create challenging bugs, this is a great way to do it. This way once we load in App B, its first going to check and see what App A has already loaded and leverage any libraries it can. Case Studies A Blog Utilizing This Websites Modules Staying up to date on technology and patterns are important, allowing me to work within your existing stack, or propose one that will scale far into the future. Say goodbye to divergent styles and duplicate components throughout parallel teams. Otherwise, if its the only micro-app using that library, it will simply bundle a version of that library within itself (ex. To avoid updating all of these import statements to use a consistent approach (ex. It does this by pulling them out of the the build pipeline and out of your apps. This may be a domain-specific concern instead but I was curious if there was any pre-existing thought or prior art on limiting by auth or by request (e.g. If SPA A wants to utilize another SPA's (SPA B) modal for whatever, the system in place relies on opening a browser-sized iframe to SPA B where the modal is displayed. Control from consumer to container Overriding modules is a one-directional operation. Teams can consume components at runtime instead of as part of their build pipeline. module-federation/node module-federation/utilities module-federation/typescript Generate an application Run nx g @nrwl/next:app my-app to generate an application. Is there prior art in the Webpack domain that I'm missing that would be applicable? It covers the internal implementation of Module Federation, and how Module Federation fits with other sharing options. Hi, I haven't seen much discussion related to security and access considerations when using Module Federation, so I thought I'd start one here. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Currently, you could import these chunks but they would have to come from your same project. This code is already contained in the common.js file above. Were now going to update the shared property of the ModuleFederationPlugin to include these custom libraries. At this point you should have a fairly good grasp on how both vendor libraries and custom libraries are shared in the module federation system. As your application grows, so does the amount of code you share. You signed in with another tab or window. Module parse failed: Unexpected token i in JSON at Migrating app to use Module Federation and Micro-frontends, Press J to jump to the feed. Also plugin comes along with webpack library without need of installing another dependency as well. To activate it, we need a custom builder that, e. g. ships with the community solution @angular-architects / module-federation. In this instance, App A and B will use their own versions within each of their bundles. Promise Based Dynamic Remotes: docs. If it needs a library that hasnt been loaded in yet (or the version it needs isnt compatible with the version App A loaded in), then it will proceed to load on its own. Before You Proceed: If you wish to see the code associated with the following section, you can check it out in this branch. Since the alias configuration in webpack is already leveraging the paths in the tsconfig.base.json file to build out these aliases dynamically (discussed above), we can simply update that file and provide all the specific paths to each component: We can now import each one of these individual components: If we investigate our network traffic, we can see that each one of those imports gets broken out into its own individual file: This approach has several pros and cons that we discovered along the way: We recommend you choose the solution that works best based on your codebase. As we soon discovered, most of our bugs/issues resulting from this new architecture came as a result of updating one of these areas (state, theme, storage) and allowing the micro-apps to deploy at their own pace. To verify the settings, you can do the following: The setting can be verified using the below PowerShell cmdlet. We used a similar approach above for building out our aliases. When using Nx, you can create multiple applications and libraries in the same workspace. Similar to the vendor libraries approach, we need to tell module federation that we would like to share these custom libraries. Went looking for this reddit because I want to introduce module federation to my company. Learn how Tenable finds new vulnerabilities and writes the software to help you find them, Breaking down the OSI model by buying pizza, Bluzelle Development Update + Launch of Developer Bounty, Solving Popular Algorithms: Balancing Strings, How to write a program that prints itself, #FeatureWeek#AYearInReviewPart 4 Q4 2019, How to Setup Kubernetes Cluster with Microk8s, Module Federation Managing Your Micro-Apps. and theming (styled-components for us), you cannot rely on this. Was this translation helpful? WebAssembly 126 Apache-2.0 9 9 (3 issues need help) 11 Updated 7 hours ago However, when it comes to things like state (Redux for us), storage (window.storage, document.cookies, etc.) Currently, when we import one of the test components, it comes from the index file shown below. Similar to our main index file, these import statements contain everything within their directories. As an example scenario: say you have a long living host with remote components on it, and other hosts consume from it. You can read more about how we handled this via a Jenkins bootstrapper job in the next article. Here is where Module Federation comes. It looks up the used version in your package.json. Now, we want to take those same principles and apply them to the custom library code we have living in the libs directory. With Module Federation you can import remote Webpack builds to your application. This is an easy way to ensure that as new paths are added to your libraries, they are automatically picked up by webpack: How does webpack currently treat this library code? The book also covers many practical topics include; state sharing across shared code, different deployment options, sharing non-view related code, writing your code to be resilient to code and network failures, and so much more. Start by creating a new project folder with the following package.json to allow us to run our two SPAs at the same time: Is there any consideration to how to control access to the remote components? I want to introduce module federation to my company. Note: We are once again leveraging the tsconfig.base.json to dynamically build out the libs that should be shared. Hence, we also get Module Federation out of the box. As shown in the diagram below, when App A is loaded in, it pulls down all the libraries shown. When App B is loaded in its going to do the same thing. Furthermore, only one version gets loaded by the Host application (port 3000). With federated access, you have a secure, seamless sign-on experience to external applications, helping to eliminate the need for providing multiple user IDs and passwords. In this case, thats okay because the code is constrained to an actual file. It does this by pulling them out of the the build pipeline and out of your apps. If webpack is too low-level like I fear it might be, what is a common pattern people are doing to accomplish permission checking? To demonstrate sharing libraries, were going to focus on Test Component 1 that is imported by the Host and Application 1: This particular component lives in the design-system/components workspace: We leverage the tsconfig.base.json file to build out our aliases dynamically based on the component paths defined in that file. As shown below, at times we imported from the main index file of tenable-io/common (tenable-io/common.js), but in other instances we imported from sub directories (ex. This is the system I want module federation to replace, but I do have a big question - is there a way to prevent 3rd party applications from loading modals they shouldn't? Gone are the days of updating each consuming application after making a change to a shared NPM package. Imagine that we continue to add more components: You may get to a certain point where you think it would be beneficial to not bundle these files together into one big file. Aegis core lib. However, the mechanism of defining a version is different. Press question mark to learn the rest of the keyboard shortcuts. Went looking for this reddit because I want to introduce module federation to my company. The Module Federation has two main components: The Remote Federated Module / Microfrontend The host/portal/ container Federated Module The Host will consume and render the exposed. "Practical Module Federation" is the first, and only, book on Webpack 5's innovative new live code sharing mechanism. For example, lets say we have a notifications library shared between the micro-apps. Going forward please raise any issues in the NextJs-mf repo. Dynamic Remote Containers: docs. Let services deploy themselves. Webpack Module Federation is actually solving all these issues in a much more elegant way. In these instances, we needed to ensure that all the micro-apps were deployed at the same time to ensure the applications and the state, store, and theming were all in sync. Good question, thanks for clarifying it for me. The problem is once again that App B is pulling down duplicate libraries that App A has already loaded in. Without module federation your clients also can load your code, no security problems here, anyway if you want to do it more security, you should setup this on server level. Webpack plugin external-remotes-plugin. This prevents several issues. Module Federation allows a JavaScript application to dynamically load code from another application and in the process, share dependencies. Bonus: Programmatic Loading Webpack module federation is quite new but has already changed the architectural concepts of building modern web applications. It walks you through everything you need to do to start with Module Federation. However, for another application this could be a very bad decision, and your customers could end up having to pull down a ton of granular files when it would have made more sense to only have them pull down one larger file. Right now, my company has an ecosystem set up where multiple Angular SPAs are deployed under a common domain. Generate a library Dynamic Remotes in Webpack Module Federation. const doModuleAuth = async (modId) => true; module.exports.init = async (args) => {, // This will most likely totally blow up the consuming application. This was a relic from our initial architecture and essentially housed all the shared code that our various applications used. For some applications, going granular is an ideal solution and leads to the best performance in your application. Typically, shared code lives in an actual file (some-file.js) that resides within a micro-apps bundle. If you wish to see the code associated with the following section, you can check it out in this branch. The setting requiredVersion: 'auto' is a little extra provided by the @angular-architects/module-federation plugin. A connection to the Microsoft Federation Gateway is established. Without module federation your clients also can load your code, no security problems here, anyway if you want to do it more security, you should setup this on server level Marked as answer 1 1 reply blackbaud-jeremymorgan on Sep 13, 2021 Author Ohhh good point, that clients can load the app bundle as-is now. This means that when webpack bundles everything together, one large file is created for this import statement that contains everything (well call it common.js). Ah, gotcha. We now have bloat in our system that causes the customer to pull down more javascript than necessary. All the feature development for this package will be made from the new repo. To demonstrate this situation, let's install @angular/material and @angular/cdk in a version that is at least 2 versions behind our Angular version. This was the purpose of the serve script shown above, i.e. Eliminate the need for deployment automation. This can be interesting to improve an application's startup performance, when there are lots of shared dependencies. We will be using a yarn mono-repo structure here for simplicity, but the idea behind Module Federation is to allow teams to operate autonomously, so in the real world, your SPA's would most likely live in their own repositories. In the first update, the presentation portion of this library is updated. We now get to the most granular import statement where were importing from a specific file. The Problem: Security Tokens in the Browser. Module Federation allows to directly bundle shared dependencies into your app's bundles. This article focuses on the importance of sharing your custom library code between applications and some related best practices. As a result, they can both operate independently without bugs. Extended protection for authentication is a feature that mitigates against man in the middle (MITM) attacks and is enabled by default with AD FS. Before You Proceed: The remainder of this article is very technical in nature and is geared towards engineers who wish to learn more about sharing custom library code between your micro-apps. I could consume your code at any point regardless of if its a federated module. At this point the code is not shared in any way and each application simply pulls the library code from its own bundle. Since version 12, the Angular CLI uses webpack 5. If we investigate the network traffic again and look for libs_design-system_components (webpacks filename for the import from @microfrontend-demo/design-system/components), we can see that this particular library has now been split into its own individual file. Concept goals It should be possible to expose and use any module type that webpack supports. Limitations For example say we're trying to make a system of paid plugins that are able to be installed on an instance, and the plugins are federated (so are long living for any instance to use), but you should only have plugins if you have a particular license. If SPA A wants to utilize another SPA's (SPA B) modal for whatever, the system in place relies on opening a browser-sized iframe to SPA B where the modal is displayed. Hence, you don't need to load an additional bundle per shared dependency. Hybrid Sharing Leads To Bloat When we first started using module federation, we had a library called tenable.io/common. rollup-federation. We then move down a level in our import statements and import from subdirectories within tenable-io/common (components and utilities). I get it, but is this really a concern? theyre not leveraging the same version of shared code where this change was made), the applications will attempt to store and access notifications in memory in two different ways. if (!await doModuleAuth(modId)) throw new Error("Not authorized"); You signed in with another tab or window. As it comes with respective schematics, you can easily ng add it to your CLI workspace: If SPA A wants to utilize another SPA's (SPA B) modal for whatever, the system in place relies on opening a browser-sized iframe to SPA B where . Right now, my company has an ecosystem set up where multiple Angular SPAs are deployed under a common domain. As you can imagine, this can have a dramatic impact on the performance of your application. ModuleFederationPlugin is a high level webpack plugin that provides a very convenient way to configure module federation in your projects. At this point, we have a lot of bloat in our system as these individual files are already contained within both import types above. As illustrated below, App A and B both use Lib 1. We will be actively updating this book over the next year as we learn more about best practices and what issues people are running into with Module Federation, as well as with every release of Webpack as it moves towards a release candidate and release. When these micro-apps are built, they each contain a version of that library within their build artifact. . Thank you so much for pointing this out to me. E.g. To demonstrate this, lets say that weve made a change to the way state is getting stored and accessed. Assuming you read the previous article, you now know why this is important. Beta Sharing State/Storage/Theme While we tried to keep our micro-apps as independent of one another as possible, we did have instances where we needed them to share state and theming. If webpack is too low-level like I fear it might be, what is a common pattern people are doing to accomplish permission checking? In short, each parts of the application can come with their own libraries, that will be made available . That's just how the web works. Can you see the problem? To demonstrate why this was a bad idea, well walk through each of these import types: starting from the most global in nature (importing the main index file) and moving towards the most granular (importing a specific file). My thoughts here are to build in some kind of token auth within components so even if they are exposed and someone starts an improper host using the same config, the code isn't useful without authenticating with a service first. Now, you can have these chunks (Webpack builds) from a different origin, which means, a different project! Installation $ npm i @module-federation/typescript Usage Typescript support for module federated apps Project Status This project is now moved to module-federation/nextjs-mf. You can could use startup code to override the "init" and or "get" method on the container and do some auth logic there when initializing or retrieving a module: https://gist.github.com/jacob-ebey/23aee3036c0c0c78a0b9369a5d8286ff, this is exactly what I was looking for! This is because these items live in memory and are shared at a global level, which means you cant rely on them being confined to a physical file. However, only App B gets deployed to production with the new code. Sharing our libraries is similar to the vendor libraries discussed in the previous article. https://gist.github.com/jacob-ebey/23aee3036c0c0c78a0b9369a5d8286ff. Give feedback. Hey guys, new member here. The helper function share used in this generated configuration replaces the value 'auto' with the version found in your package.json. Specifically, when we build a particular library, we actually look at the folder containing the library and generate a unique hash based off of the contents of the directory. This powerful orchestration micro-frontend architecture will make it easier for organizations to decouple their applications and share across teams. Luckily Webpack Module Federation supports dynamically defining URLs for our remote applications.
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