Hi Guys, I read the NGINX docs for API Gateway functionality where I can get my the users to my upstream application get authenticated by a different application. Adopting Microservices at Netflix: Lessons for Architectural Design, A Guide to Caching with NGINX and NGINX Plus. Let’s imagine you are building an online store that uses the Microservice architecture pattern and that you are implementing the product details page.You need to develop multiple versions of the product details user interface: 1. Unhandled exceptions may contain stack traces or other sensitive data that we don’t want to be sent to the client. One advantage of using NGINX as an API gateway is that it can perform that role while simultaneously acting as a reverse proxy, load balancer, and web server for existing HTTP traffic. Could a Mars surface rover/probe be made of plastic? Can salt water be used in place of antifreeze? Its is an reverse proxy which works as an entry point for all your APIs. You can use the following mechanisms for authentication and authorization: Resource policies let you create resource-based policies to allow or deny access to your APIs and methods from specified source IP addresses or VPC endpoints. At the heart of modern application architectures is the HTTP API. API keys are a shared secret known by the client and the API gateway. API Gateway supports multiple mechanisms for controlling and managing access to your API. The Warehouse API is implemented as a collection of discrete microservices and published as a single API. It can translate between web protocols and web‑unfriendly protocols that are used internally. With the auth_request directive (line 7) we can, for example, have authentication handled by an external authentication server such as OAuth 2.0 token introspection. This is the first blog post in our series on deploying NGINX Open Source and NGINX Plus as an API gateway: Note: Except as noted, all information in this post applies to both NGINX Open Source and NGINX Plus. API Gateway verifies if the user is trying to access a secured resource, if it is, verify the token and send back a 2xx response. Unlike a web browser, an API gateway cannot send its clients a redirect (code 301 (Moved Permanently)) naming the new location. Confirm that the user named by the user directive in the NGINX Plus configuration (in /etc/nginx/nginx.conf by convention) has read permission on the JWK file. Nginx should redirect this call to the API Gateway. My Idea was to develop 2 applications as a proof of concept. If neither of those conditions match, the API key is valid and the location returns a 204 (No Content) response. The rewrite directive on line 3 converts requests to the old pricing resource into requests to the new pricing service. For example, when a client presents the API key 7B5zIqmRGXmrJTFmKa99vcit, the $api_client_name variable is set to client_one. Using NGINX you can also load balance your API Gateway. The session cookie is returned in response to a GET /api/v1/platform/login request. The NGINX Controller API uses session cookies to authenticate requests. should I be considering other options authentication options? In this example we instead add the logic for validating API keys to the top‑level API gateway configuration file, in the form of the following location block called /_validate_apikey. Policy configuration is inherited from the outer location unless there is a need to provide a more specific policy for certain URIs. For an excellent introduction to the importance of API gateways for microservices applications, see Building Microservices: Using an API Gateway on our blog. APIs are driving force behind many applications big and small. Auth creates a token and sends it back to the user. Asking for help, clarification, or responding to other answers. Why first 2 images of Perseverance (rover) are in black and white? An ecommerce site might use a… API Key is usually a long, pseudo-random string included in the request header or request URL. NGINX Plus is the commercially supported product built on NGINX with added enterprise-grade features. If you don't deploy a gateway, clients must send requests directly to front-end services. The API Gateway might first need to validate the request by calling an authentication service, before routing the request to a backend service. Here we enable API key authentication by amending the “broad” configuration (warehouse_api_simple.conf) to include an auth_request directive in the policy section that delegates the authentication decision to a specified location. Hi, I am trying to implement the NGINX API gateway in nginx 1.10.3 … NGINX has a highly efficient and flexible system for matching the request URI to a section of the configuration. You should now have a running API gateway! This first blog in a series details a complete solution for deploying NGINX Open Source and NGINX Plus as an API gateway. HTML5/JavaScript-based UI for desktop and mobile browsers - HTML is generated by a server-side web application 2. Doing this is quite simple. The map directive takes two parameters. Each of these files and directories enables a different feature or capability of the API gateway and is explained in detail below. The order of the location directives is not important – the most specific match is chosen. JSON Web Tokens (JWTs) are increasingly used for API authentication. However, some of the default behavior expected of an API gateway differs from that expected for browser‑based traffic. NGINX Plus subscribers can also take advantage of dynamic DNS load balancing to have new backends added to the runtime configuration automatically. User tries to access the /someservice/somepage page with a token. The applications are as follows 1. It is written in Lua running with the help of the Nginx . When Christians say "the Lord" in everyday speech, do they mean Jesus or the Father? Creating API keys is simple – just encode a random number as in this example. HTTP enables applications to be built rapidly and maintained easily. Taking the precise approach, the following configuration for URI routing in the Warehouse API uses a combination of exact matching (=) and regular expressions (~) to define each and every valid URI. Whether your publishing a public API or building a new integrations marketplace,APIs are becoming the way business is done. Check this box so we and our advertising and social media partners can use cookies on nginx.com to better tailor ads to your interests. Podcast 314: How do digital nomads pay their taxes? Kong’s library of plugins includes simple ways to implement the best known and most widely used methods of API gateway authentication.Simply add the relevant plugin to your Kong deployment and you’re ready to start authorizing consumers in the appropriate way. They’re on by default for everybody else. powered by Disqus. By using HTTP, the advancements in web application delivery that support hyperscale Internet properties can also be used to provide reliable and high‑performance API delivery. Follow the instructions here to deactivate analytics cookies. Thanks for contributing an answer to Stack Overflow! We describe a complete configuration, which can form the basis of a production deployment. The outer location block (/api/warehouse) identifies the base path, under which nested locations specify the valid URIs that get routed to the backend API services. In the following example, we use the same broad approach as in warehouse_api_simple.conf above, but in this case the configuration is replacing a previous version of the Warehouse API where the pricing service was implemented as part of the inventory service. Authentication. The API gateway typically handles authentication and authorization, request routing to backends, rate limiting to avoid overloading systems and protect against DDoS attacks, offloading SSL/TLS traffic to improve … In this blog post we refer to a hypothetical API for inventory management, the “Warehouse API”. This configuration is intended to be static – the details of individual APIs and their backend services are specified in the files referenced by the include directive on line 19. API client authentication with JWT and NGINX Plus. Here, we focus on API‑specific authentication methods. The top‑level API gateway configuration includes a section that defines how to handle error responses. Together with F5, our combined solution bridges the gap between NetOps and DevOps, with multi-cloud application services that span from code to customer. Apache APISIX is based on Nginx and etcd. One of the key differences between HTTP APIs and browser‑based traffic is how errors are communicated to the client. The internal directive on line 29 means that this location cannot be accessed directly by external clients (only by auth_request). This variable can be used to check for authenticated clients and included in log entries for more detailed auditing. Is it reasonable to expect a non-percussionist to play a simple triangle part? All NGINX configuration starts with the main configuration file, nginx.conf. Copyright © F5, Inc. All rights reserved.Trademarks | Policies | Privacy | California Privacy | Do Not Sell My Personal Information, NGINX Microservices Reference Architecture, Deploying NGINX as an API Gateway, Part 1, Building Microservices: Using an API Gateway, errors generated by the backend services themselves, Authenticating API Clients with JWT and NGINX Plus. It is a shared secret between the API client and the API gateway. Some APIs may be implemented at a single backend, although we normally expect there to be more than one, for resilience or load balancing reasons. The api_gateway.conf file defines the virtual server that exposes NGINX as an API gateway to clients. With this configuration in place, the Warehouse API now implements API key authentication. This project provides an example of configuring NGINX to act as an authenticating and caching gateway for read-only requests (GET/HEAD) to the S3 API. The complete list of standardized error responses is defined in a separate configuration file referenced by the include directive on line 24, the first few lines of which are shown below. Here, our Warehouse API is deployed as two separate services, each with multiple backends. This file can be modified if an error format other than JSON is preferred, with the default_type value on line 25 of api_gateway.conf changed to match. 3 min read Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy, and HTTP cache. Why has Pakistan never faced the wrath of the USA similar to other countries in the region, especially Iran? Here, we focus on API‑specific authentication methods. Users can also be prompted to grant the application visibility into their access levels. So the API’s path structure is: As an example, to query the current warehouse inventory, a client application makes an HTTP GET request to /api/warehouse/inventory. NGINX Plus offers several approaches for protecting APIs and authenticating API clients. It is unusual to publish APIs without some form of authentication to protect them. With this configuration in place, NGINX accepts some URIs and rejects others as invalid: Using a precise API definition enables existing API documentation formats to drive the configuration of the API gateway. This configuration adds a further level of protection by sending a standardized error response to the client. NGINX Open Source is a free HTTP web server, mail proxy server, and HTTP, TCP, and UDP reverse proxy and load balancer. Kong Gateway is the most popular open-source cloud-native API gateway built on top of a lightweight proxy. For API endpoints that are being served by NGINX, NGINX inspects the access tokens and validates whether or not the user is authorized. There are two approaches to API definition – broad and precise. rev 2021.2.18.38600, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide, Configuring nginx with an API Gateway & authentication service, Strangeworks is on a mission to make quantum computing easy…well, easier. As the leading high‑performance, lightweight reverse proxy and load balancer, NGINX has the advanced HTTP processing capabilities needed for handling API traffic. Line 34 handles the case where the API key does not match any of the keys in the map block – in which case the default parameter on line 2 of api_keys.conf sets $api_client_name to an empty string – and we send a 403 (Forbidden) response to tell the client that authentication failed. This blog post makes extensive use of the include directive to aid readability and to enable automation of some parts of the configuration. The NGINX Plus configuration for validating JWTs is very simple. Typically it handles a request by invoking multiple microservices and aggregating the results, to determine the best path. Adding Load Balancing. The use of JSON is not, however, a limitation or requirement of NGINX when deployed as an API gateway; NGINX is agnostic to the architectural style and data formats used by the APIs themselves. We offer a suite of technologies for developing and delivering modern applications. In warehouse_api_simple.conf above, we use the broad approach for the Warehouse API, defining URI prefixes on lines 10 and 14 such that a URI that begins with one of the prefixes is proxied to the appropriate backend service. It is a template engine that helps to accelerate the event time. Fortunately, when it’s impractical to modify API clients, we can rewrite client requests on the fly. One can Tech  ›   Deploying NGINX as an API Gateway, Part 1. One of my players want to carry his familiar on his body and says it should not be targeted by enemies because it can hide on his body? Connect and share knowledge within a single location that is structured and easy to search. In an Ocelot API Gateway you can sit the authentication service, such as an ASP.NET Core Web API service using IdentityServer providing the auth token, either out or inside the API Gateway. Using an outer block enables us to define common policies that apply to the entire API (in this example, the logging configuration on line 6). Kong is focused on API management and offers features such as authentication, rate limiting, retries, circuit breakers and more. Home› Nginx should redirect these calls directly to the auth service. Testing. Combined with other API gateway capabilities, NGINX Plus enables you to deliver API‑based services with speed, reliability, scalability, and security. Nginx gets a 2xx response & redirects the user to the. Time Reversal Symmetry: An Intuitive Picture. This configuration exposes all of the APIs published by the API gateway at a single entry point, https://api.example.com/ (line 8), protected by TLS as configured on lines 11 through 16. There are two types of authentication policies: API Key and JWT. Lines 22 through 25 deal with error handling, and are discussed in Responding to Errors below. The format of the map block is simple and easy to integrate into automation workflows that generate the api_keys.conf file from an existing credential store. So finally I kept my original configurations with some small tweaks like the great auth_request nginx directive, and I group functionality by level of protection, if the user tries to access a secured resource, then nginx will validate first the request via another service. This configuration is more verbose, but more accurately describes the resources implemented by the backend services. On the other hand, a more precise approach enables the API gateway to understand the API’s full URI space by explicitly defining the URI path for each available API resource. The Warehouse API is defined by a number of location blocks in a nested configuration, as illustrated by the following example. Nginx should redirect this call to the API Gateway. Native JWT support is exclusive to NGINX Plus, enabling validation of JWTs as described in Authenticating API Clients with JWT and NGINX Plus on our blog. The name of the area will be shown in the username/password … Similarly, to fetch information about the products in a customer’s wish list, the API Gateway must first retrieve the customer’s profile containing that information, and then retrieve the information for each product. We use sample configuration code to illustrate different use cases. Learn more at nginx.com or join the conversation by following @nginx on Twitter. Here are the contents of that file: The API keys are defined within a map block. For ease of reading, the rest of the blog refers simply to “NGINX”. Cloud-native microservices API gateway, delivering the ultimate performance, security, open source and scalable platform for all your APIs and microservices. Making statements based on opinion; back them up with references or personal experience. Our API gateway needs to manage existing APIs, monoliths, and applications undergoing a partial transition to microservices. The resulting directory structure under /etc/nginx looks like this. One such example is when an API resource is renamed or moved. Any URIs that do not match one of the nested locations are handled by the outer location, which includes a catch‑all directive (line 18) that returns the response 404 (Not Found) for all invalid URIs. Here, the nested locations on lines 10 and 14 define two URIs that are more specific than the outer location block; the proxy_pass directive in each nested block routes requests to the appropriate upstream group. This (optional) behavior requires that API clients make requests only to the valid URIs included in the API documentation, and prevents unauthorized clients from discovering the URI structure of the APIs published through the API gateway. This has the advantage of protecting the backend services from malformed client requests, at the cost of some small additional overhead for regular expression matching. An API gateway is the gatekeeper for access to APIs, securing and managing traffic between API consumers and the applications that expose those APIs. Nginx’s functions are all covered by API gateway, including reverse proxy, load balancing, caching, secure authentication, rate-limiting, speed-limiting, etc. NGINX offers several approaches for protecting APIs and authenticating API clients. comments Ethics of warning other labs about possible pitfalls in published research, Save and load the classes definition table in the QGIS reclassify by table tool, Save as GeoPackage Layer Options - use of Description and Identifier, Story about a lazy boy who invents a robot to do all his work, tagline is "laziness is the mother of invention". Configuring NGINX and NGINX Plus for HTTP Basic Authentication Inside a location that you are going to protect, specify the auth_basic directive and give a name to the password-protected area. NGINX Plus provides support for JWT authentication and sophisticated configuration solutions based on the information contained within the JWT itself. Nginx gets a 2xx response & redirects the user to the real /someservice Someservice generates the response and sends it back to the user. On line 2 of the top‑level API gateway configuration file, api_gateway.conf, we include a file called api_keys.conf, which contains an API key for each API client, identified by the client’s name or other description. User tries to access the /login or /register pages. Notice that this configuration is purely HTTPS – there is no plaintext HTTP listener. What's interesting about Kong is that it comes packaged as a Kubernetes Ingress. To read in the API gateway configuration, we add an include directive in the http block in nginx.conf that references the file containing the gateway configuration, api_gateway.conf (line 28 just below). To learn more, see our tips on writing great answers. Someservice generates the response and sends it back to the user. Clients are expected to present their API key in the apikey HTTP header. You can also have a separate include directive in each API’s policy section to reference a different file of error responses which override the global responses. To achieve this separation, we create a configuration layout that supports a multi‑purpose NGINX instance, and provides a convenient structure for automating configuration deployment through CI/CD pipelines. Imagine that your application has increased its user base, and now the authentication API needs to be scaled out to handle the additional load. I'm currently implementing some logic in my nginx configuration so I can handle authentication and token verification. See the documentation for information about IP address‑based access control lists (ACLs), digital certificate authentication, and HTTP Basic authentication. Using the API for Dynamic Configuration. Blog› Authentication policies allow to you restrict access to your APIs by determining the identity of the caller. Conservation of Energy with Chemical and Kinetic Energy. This deactivation will work even if you later click Accept or submit a form. With this configuration in place, a client request for an invalid URI receives the following response. An API gateway takes all API calls from clients, then routes them to the appropriate microservice with request routing, composition, and protocol translation. And most importantly, how do I implement this logic using nginx? The most suitable approach for each API depends on the API’s security requirements and whether it is desirable for the backend services to handle invalid URIs. API Gateway verifies if the user is trying to access a secured resource, if it is, verify the token and send back a 2xx response. Accept cookies for analytics, social media, and advertising, or learn more and adjust your preferences. The inventory and pricing resources are implemented as separate services and deployed to different backends. If NGINX is already part of your application delivery stack then it is generally unnecessary to deploy a separate API gateway. Configuring NGINX Plus as an Authenticating API Gateway. For that reason we separate the API gateway configuration from any existing (or future) configuration for browser‑based traffic. This video is a quick explanation of how to build a scalable API Gateway with NGINX. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. In a browser, enter the address of your NGINX Plus instance and try to log in using the credentials of a user assigned to the application (see Step 10 of Configuring Okta). It is possible to automate the NGINX API definitions from the OpenAPI Specification (formerly called Swagger). What programming languages were most commonly used on the AS/400 in the 90s? The error_page directive on line 22 specifies that when a request does not match any of the API definitions, NGINX returns the 400 (Bad Request) error instead of the default 404 (Not Found) error. See the Login endpoint in the NGINX Controller API Reference documentation for information about session cookie timeouts and invalidation. Join Stack Overflow to learn, share knowledge, and build your career. For information about approaches that also apply to regular HTTP requests, see the documentation for IP address‑based access control lists (ACLs), digital certificate authentication, and HTTP Basic authentication. We expect API clients to know the correct entry point and to make HTTPS connections by default. Is there a way to prevent my Mac from sleeping during a file copy? If the only consideration is proxying each request to the correct backend service, the broad approach provides the fastest processing and most compact configuration. The directories and filenames for all API gateway configuration are prefixed with api_. The complete set of files discussed in this blog can be reviewed and downloaded from our GitHub Gist repo. All of the backend API services, for all of the APIs published by the API gateway, are defined in api_backends.conf. The second parameter creates a new variable ($api_client_name) and sets it to the value of the second parameter on the line where the first parameter matches the key. Therefore, the API gateway sits between the client apps and the microservices. Congratulations! Uncheck it to withdraw consent. F5, Inc. is the company behind NGINX, the popular open source project. An API key is essentially a long and complex password issued to the API client as a long‑term credential. API Gateway allows you to leverage AWS administration and security tools, such as AWS Identity and Access Management (IAM) and Amazon Cognito, to … 15. With this broad, prefix‑based location matching, API requests to the following URIs are all valid: /api/warehouse/inventory/api/warehouse/inventory//api/warehouse/inventory/foo/api/warehouse/inventoryfoo/api/warehouse/inventoryfoo/bar/. The first defines where to find the API key, in this case in the apikey HTTP header of the client request as captured in the $http_apikey variable. Since eShopOnContainers is using multiple API Gateways with boundaries based on BFF and business areas, the Identity/Auth service is left out of the API Gateways, as highlighted in … Compared with traditional API gateways, APISIX has dynamic routing and plug-in hot loading, which is especially suitable for API management under micro-service system. These cookies are on by default for visitors outside the UK and EEA. The warehouse_api.conf file is a generic stand‑in for the configuration files discussed below that define the Warehouse API in different ways. NGINX S3 Gateway. Providing an authentication gateway using an alternative authentication system to S3 The Warehouse API is a RESTful API that consumes JSON requests and produces JSON responses. A sample script for this purpose is provided among the Gists for this blog post. API Gateway provides you with multiple tools to authorize access to your APIs and control service operation access. Note that the default nginx.conf file uses an include directive to pull in browser‑based HTTP configuration from the conf.d subdirectory (line 29). As APIs evolve, it’s sometimes necessary to make changes that break strict backward compatibility and require clients to be updated. Documentation for NGINX Open Source and NGINX Plus. It may also perform various cross-cutting tasks such as authentication, SSL termination, and rate limiting. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. API gateways perform a variety of functions including authenticating API calls, routing requests to the right backends, applying rate limits to prevent overburdening your systems, and handling errors and exceptions. Here we use multiple IP address‑port pairs in each upstream block to indicate where the API code is deployed, but hostnames can also be used. 1. Line 23 refers to errors generated by the backend services themselves. It acts as a reverse proxy, routing requests from clients to services. It acts as a reverse proxy, routing requests from clients to services. Once you have decided to implement real‑time APIs, what are the key characteristics of the API gateway architecture? Not all APIs are microservices applications. If this header is missing or empty (line 31), we send a 401 (Unauthorized) response to tell the client that authentication is required. Kong is an API gateway built on top of Nginx. Check out the other posts in this series: To try NGINX Plus, start your free 30-day trial today or contact us to discuss your use cases. It is unusual to publish APIs without some form of authentication to protect them. An API gateway sits between clients and services. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Opt-in alpha test for a new Stacks editor, Visual design changes to the review queues, client authentication when using nginx proxy_pass, JWT (JSON Web Token) automatic prolongation of expiration, API gateway and microservice authentication, Custom Authentication Service in Kong API Gateway. why the まったく in the sentence implies negative, instead of positive. When an end user authenticates with Okta, Okta creates a token that represents the user’s level of access. Main What are the most common methods of API gateway authentication? The primary function of the API gateway is to provide a single, consistent entry point for multiple APIs, regardless of how they are implemented or deployed at the backend. When NGINX is deployed as an API gateway, we configure it to return errors in a way that best suits the API clients. My logic here is: First of all, does this logic seems alright to you? Native Android and iPhone clients - these clien… For a sample implementation, see Controlling Access to Specific Methods in Part 2. The NGINX Plus REST API supports the following HTTP methods: GET – Display information about an upstream group or individual server in it; POST – Add a server to the upstream group; PATCH – Modify the parameters of a particular server; DELETE – Delete a server from the upstream group; The endpoints and methods for the NGINX Plus API … This makes NGINX the ideal platform with which to build an API gateway. This free eBook shows you how to deploy NGINX Plus as an API gateway. In this blog post we describe a number of common API gateway use cases and show how to configure NGINX to handle them in a way that is efficient, scalable, and easy to maintain. Potential Use Cases. How do I deal with my group having issues with my character? The HTTP API provides a common interface, regardless of the scale of the application, from a single‑purpose microservice to an all‑encompassing monolith. With microservices APIs, we define individual backends for each service; together they function as the complete API. It can also provide additional cross-cutting features such as authentication, SSL termination, and cache.