istio request authenticationistio request authentication

And because the network is not reliable, we need to implement retries and circuit breakers. Istio 1.5.2: how to apply an AuthorizationPolicy with HTTP-conditions to a service? You can learn what each space-separated field stands for by printing the access log format achieved with the command below: So the first entry is the [%START_TIME%] which from the log listed previously is the value [2022-04-18T12:09:44.091Z], and so on. DestinationRule for - to: - operation: methods: ["OPTIONS"] For example, deprecated in favour of By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Kiali is a powerful console for Istio. Now users can authenticate and receive a JWT, which is used in subsequent requests to the cluster services. Encrypt TLS certificate for us. managing the security layer of your mesh at scale. Is "different coloured socks" not correct? Ill use those terms interchangeably in the continuation of the article. 1 Answer Sorted by: 2 I'm placing this answer for better visibility. The key metadata that we use in the next section is the requestPrincipals which Istio constructs by combining the iss and sub claims of the JWT. Lets print out one log entry from the sa-webapp service to see the recorded data. technology Now, the number of contributors has grown to include many other organizations such as Solo.io, Tetrate, Aspen Mesh, and more. The Kubeflow Controlling mutual TLS and end-user authentication for mesh services. This means Istio needs to extract credentials from requests and prove they are authentic. Because Envoy has to be kept up to date with the changes that occur in the environment. Here is our approach of the scenario to allow more than one issuer policy number of ways to achieve this with Istio however here we look at two solutions and how their tool for retrieving a JWT locally to see the claims your identity provider returns for a particular ansible Since we have not deployed oauth2-proxy yet, visting your domain again should now show: RBAC: access denied, so the final thing we need to do is to deploy oauth2-proxy to manage the OIDC flow, solver instead. containerization when a user try to access my . Next, we need to configure what to do with the admitted traffic. We'll answer that next, when we show the security and observability benefits youve gained. Even better, you can integrate Istio with those :). The "Release phase" is where Istios traffic management capabilities come in handy and allow for the implementation of the following delivery patterns: In this article, well show the canary deployment pattern to validate the new version of the app before we release it to real traffic. user is then redirected again back to the original service, passing the Authorization Code as an We mentioned that certificates are used to encrypt traffic and protect it from man-in-the-middle attacks. Install Multi-Primary on different networks, Install Primary-Remote on different networks, Install Istio with an External Control Plane, Install Multiple Istio Control Planes in a Single Cluster, Getting Started with Istio and Kubernetes Gateway API, Customizing the installation configuration, Custom CA Integration using Kubernetes CSR *, Istio Workload Minimum TLS Version Configuration, Classifying Metrics Based on Request or Response, Configure tracing using MeshConfig and Pod annotations *, Learn Microservices using Kubernetes and Istio, Wait on Resource Status for Applied Configuration, Monitoring Multicluster Istio with Prometheus, Understand your Mesh with Istioctl Describe, Diagnose your Configuration with Istioctl Analyze, ConflictingMeshGatewayVirtualServiceHosts, EnvoyFilterUsesRelativeOperationWithProxyVersion, EnvoyFilterUsesRemoveOperationIncorrectly, EnvoyFilterUsesReplaceOperationIncorrectly, NoServerCertificateVerificationDestinationLevel, VirtualServiceDestinationPortSelectorRequired, Require JWT for all request for workloads that have label. Prometheus and Grafana enable us to understand our services' health, performance, and improvements or degradations throughout time. And as the number of services operating on it increasesso will the number of organizations adopting Istio increase, too. --whitelist-domain flags on the oauth2-proxy Deployment to include multiple subdomains. To locate the failure, youd have to check all the services that participated in serving the request. In token-based authentication such as using JWT, a token is issued. Lets break down the requests that should be routed to SA-Frontend: Thats achieved with the following configuration: NOTE: The configuration above is in the file vs-route-ingress.yaml. The result is an ALLOW or DENY decision, based on a set of conditions at both levels. Verify that by triggering a request without a token, it is admitted and served, as shown below: However, there is a difference between requests that contain a JWT and ones without a token. Our services are ready to receive end-user traffic. Envoy to Mixer when making policy decisions it can work out whether a user has already authenticated When a request is received by the API server, it goes through the list of authentication plugins. networking He co-authored the book "Istio in Action" published by Manning. After releasing the new version to end-user traffic, you can monitor it and validate it. The mesh authentication policy uses the regular authentication policy API it is defined in the cluster-scoped MeshPolicy CRD. The next example shows how to set a different JWT requirement for a different, You can fine tune the authorization policy to set different requirement per path. And only if this is not possible the Auth service might provide a jkws for Istio's use. Understandably, you will need kubectl to interact with the cluster. Insufficient travel insurance to cover the massive medical expenses for a visitor to US? Additionally, Istio exposes an API in the format of Kubernetes Custom Resource Definitions (CRDs) with which service-operators (you) can configure the data plane. the external authorization HTTP It implies "hunting down failures." Otherwise, the connect is reset at layer 4 with the following error: Therefore, it is advisable to start with PERMISSIVE mode for a precautionary migration of workload to mTLS. NOTE: To learn about the headers your application needs to propagate and client libraries for that, check out Istios Distributed Tracing FAQ and read the answer to "What is required for distributed tracing with Istio?". At the same time, it is continuously expanding its toolset further by adding support for virtual machines, making the mesh scale into multiple clusters, and much more. OIDC is a common way of delegating the responsibility of managing user credentials to a third-party Istio AuthorizationPolicy rules questions, Istio AuthorizationPolicy only for external requests, Istio Service Mesh Security with AuthorizationPolicy & RequestAuthentication, Istio authorization policy not applying on child gateway, Istio Authorization Policy IP whitelisting, istio JWT authentication for single service behind ingress gateway, Istio Authorization policy to exclude some apps in the same namespace. The client app starts the process by redirecting users to the authentication server. in the Claim Stability and JWT claim based routing Shows you how to use Istio authentication policy to route requests based on JWT claims. And you will have other questions such as: We answer these and many other questions in the book "Istio in Action." This way, its easy to discover bottlenecks that the teams can focus on to improve their app performance. AuthorizationPolicy to check for valid principals in the request. Other requests are passed as is. Do you have any suggestions for improvement? Adapter is an example of an azure kubernetes service Does this mean I can have multiple unique "jwtRules: issuer, jwksUri" in different policy yamls, the receiving workload can accept these different JWT, but each request must contain only One particular JWT? To deploy those into your cluster, execute the command below: This installs the following tools: Prometheus, Grafana, Kiali, and Jaeger. We accomplish this by creating thousands of videos, articles, and interactive coding lessons - all freely available to the public. The resulting JWT can then be While all requests in an Istio mesh are allowed by default, Istio provides an AuthorizationPolicy resource that allows you to define granular policies for your workloads. This post has been updated for Istio version 1.11.4. You can also hook Istio up with any custom auth providers that use OAuth, such as OpenID Connect and Google Auth. The Istio agents running alongside every Envoy proxy work with istiod to automate key and certificate rotation: Istio provides two types of authentication peer authentication and request authentication. Could entrained air be used to increase rocket efficiency, like a bypass fan? Each rule will be activated only when a token is presented at the location recognized by the rule. How to use external authorization servers. You can do that with the following PeerAuthentication configuration. to either allow or deny access to the upstream service. For example, thats what we use Kubernetes Deployments for. What really makes me proud of the bookbesides it being the most in-depth elaboration of Istiois how much reference value it has. As you can see, this authentication policy has the kind: MeshPolicy. Mixer which attached JWT and corresponding claims. After all, routing traffic to workloads using path-based routing can be done with any layer 7 ingress controller.". To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The selector will match with workloads in the same namespace as the request authentication policy. The RequestAuthentication resource says that if a request to the ingress gateway contains a bearer token in the Authorization header then it must be a valid JWT signed by the specified OIDC provider. kind: RequestAuthentication. So for that purpose, we need to expose those next. Shows how to integrate and delegate access control to an external authorization system. After many improvements in the user experiencefor example, installation and day-2 operations became way easierIstio has been adopted by organizations of different sizes and industries. Assuming you have your own auth service, you can use webassembly to actieve this. Otherwise, each proxy generates the headers anew. will be used to extract the authenticated identity. the discovery URL (supported by most providers) we can retrieve the information required to It will reject a request if the request contains invalid authentication information, based on the Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Multiple Istio Request Authentication Policies, Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. Summary of the access each service needs: Istio authenticates end-user requests using JWTs as a means of authentication. Istio can enforce mTLS for TCP traffic between Pods. Common Istio Errors and How to Solve Them - Cloud Native Now Thanks for contributing an answer to Stack Overflow! A prefix @ is used to denote a match against internal metadata instead of the headers in the request. mechanism, Istio could be used as a reverse proxy to configure access to that service in a similar For Thus when traffic reaches our apps, it is already authenticated and authorized. apiVersion: security.istio.io/v1beta1 kind: RequestAuthentication metadata: name: jwt-on-ingress namespace: istio . Istio defines the Gateway custom resource with which you can configure the type of traffic to admit into the mesh. According to the Istio security doc: "Request authentication policies can specify more than one JWT if each uses a unique location. Istio can perform request authentication using its CRD. observability The metrics provide insights into the systems workings and help answer questions such as: Is the system healthy? Chaining API Requests With API Gateway - DZone The trace headers are used to combine all the information for a request in Jeager. Envoy alongside each instance of each of your services to intercept Shows how users can copy their JWT claims to HTTP headers. For the sidecar proxy to discern if the request failed or not, it has to understand application layer protocols, such as HTTP. The public key usually comes in as a JWK (JSON Web Key, RFC7517), a format convertible to and from PEM format. 2023 Jetstack Ltd. All rights reserved. For the application type, select "Regular Web Applications". of a JWT stored in an encrypted cookie, it shouldnt be possible for a user to gain access using a If yes, how? That "something" is the control plane, which uses the Envoy API to synchronize the proxy with the changes occurring in the underlying platform. Istio / Authentication Which is good, because thats the ideaits encrypted. After signing in successfully Istioldie 0.8 / Basic Authentication Policy Imagine that an end-user receives a failed request"what was the cause?" OIDC is an identity layer built upon the OAuth 2.0 protocol which allows the identity of a user to If it is only about validating a JWT token, this means a less complex setup without explicit redirection to an auth service. ingress It will reject a request if the request contains invalid authentication information, based on the configured authentication rules. Thats the default behavior of the gateway. service (or OIDC client) can then exchange this Authorization Code (using its Client ID and Client You may ask, "Why is it important?" We got the services up and running. I will discuss request authentication before request authorization. Run the debug container with the following command: It may take a minute or two (or even more) until the debug container is pulled and run. to require JWT on all paths, except /healthz, the same, RequestAuthentication to decode and validate a JWT. The selector decides where to apply the request authentication policy. The JWT consists of three parts with a period as delimiter: The third part is a signature in the format of JWS (JSON Web Signature, RFC 7515) for the JWT consumer to validate its authenticity. How strong is a strong tie splice to weight placed in it from above? Connect and share knowledge within a single location that is structured and easy to search. in a mesh. Unfortunately, currently only string and string list claims are extracted from the VS "I don't like it raining.". Its complex enough to showcase Istios features in practice. my Auth service, is an own implementation, and no i don't use auth provider such as Auth0, i think this will only redirect the request without passing the request through to the original request on success. The fields in the JWT allows for more flexibilities at the point of authorization. Istio uses mutual TLS for peer-to-peer authentication. Youll see the application, as shown in the image below. If not set, the selector will match all workloads. To understand request authentication, lets first warm up on JWT. Define the list of JWTs that can be validated at the selected workloads proxy. configure Istio. Applications running on Kubernetes platform seeks to offload common non-business features to the platform. First, users authenticate themselves, and then the authentication server returns the user to the client application with a token representing their identity. A service mesh is an architectural pattern that provides common network services as a feature of the Envoy is a versatile layer 7 proxy that is highly extensible and has a vibrant community behind it. The correlation of metrics and traces makes it straightforward for application teams to find the slowest request and the path it took through the services. integration points have been affected by changes to Istios architecture. It can enforce mTLS communication, which is known as Peer Authentication. And so on. Istio & JWT: Step-by-Step Guide for Micro-Services Authentication When more than one policy matches a workload, Istio combines all rules as if they were specified as a single policy. Based on the definition, authentication is a process or action of verifying the identity of a user or a process. Install Multi-Primary on different networks, Install Primary-Remote on different networks, Install Istio with an External Control Plane, Install Multiple Istio Control Planes in a Single Cluster, Getting Started with Istio and Kubernetes Gateway API, Customizing the installation configuration, Custom CA Integration using Kubernetes CSR *, Istio Workload Minimum TLS Version Configuration, Classifying Metrics Based on Request or Response, Configure tracing using MeshConfig and Pod annotations *, Learn Microservices using Kubernetes and Istio, Wait on Resource Status for Applied Configuration, Monitoring Multicluster Istio with Prometheus, Understand your Mesh with Istioctl Describe, Diagnose your Configuration with Istioctl Analyze, ConflictingMeshGatewayVirtualServiceHosts, EnvoyFilterUsesRelativeOperationWithProxyVersion, EnvoyFilterUsesRemoveOperationIncorrectly, EnvoyFilterUsesReplaceOperationIncorrectly, NoServerCertificateVerificationDestinationLevel, VirtualServiceDestinationPortSelectorRequired. Ingress Gateway How to Admit Traffic into the Mesh, the official documentation and follow the instructions for your operating system, https://kind.sigs.k8s.io/docs/user/quick-start/, "What is required for distributed tracing with Istio, Destination defines the service where to route traffic, Tokens that match this issuer are authenticated with this JWT rule, Matched tokens are validated against the JSON Web Key Sets (JWKS) found at this URI. For more details on what is supported by AuthorizationPolicy see the documentation There are a dictate how authentication is handled by the identity provider, but the most common is the You only have to update your services to propagate the generated trace headers to upstream services. Apart from HTTP fields, path, authenticated claims in JWT, Istio Authorization can also integrate with an Open Policy Agent (OPA) to drive actions, in advanced use cases. Each workload has the following four components: Istio uses Envoy as the sidecar proxy. Because mesh workloads are not bound to a cluster and may be running in different ones, or on virtual machines, and actually anywhere you can run and configure the sidecar proxy. implementing these extensions within Envoy itself. Thankfully, Istio supports authentication (and authorization!) Using the AuthorizationPolicy API, you can configure the proxies to accept or reject traffic. How appropriate is it to post a tweet saying that I am looking for postdoc positions? Istio Authentication and Authorization - Digi Hunch Then youd piece together the story of the "failed request" by querying all service logs, filtering by timestamp, and trying to make sense of all the data. RequestAuthentication defines what request authentication methods are supported by a workload. Verify that all traffic is routed to subset v1 using the Kiali Graph dashboard (see figure below). Authorization - Istio By Example By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This makes the JWT required for the request. fields Your output will show a new container running: NOTE: Istio 1.13 is compatible with versions 1.20 and onwards of Kubernetes. This is done by every service that has the sidecar proxy. For example, If the graphs on your side look a little empty, then generate traffic by executing the command below: Leave this command running for the remainder of the article, as we will need the traffic inflow in the continuation too. For example: spiffe://cluster.local/ns/myapp-dev/sa/default. Sometimes, your application and the proxy might misbehave. services Client Secret, they are unable to obtain such a JWT locally. You can try newer . It can enforce mTLS communication, which is known as Peer Authentication. . infrastructure. Istio will pass the authentication once the signature in the presented JWT is verified with the JWK. Envoy sidecars. It authenticates the identity of a request (as truly issued by the trusted issuer without being tampered). Jaeger comes from the German word for "hunter" (written Jger). windows, Traffic Segmentation on Kubernetes Platform, Istio Lab Authentication and Authorization, Kubernetes with Multiple CPU Architectures 2 of 2 Node and Workload, Kubernetes with Multiple CPU Architectures 1 of 2 Container Image, Use correct selectors so it only applies to, When multiple policies (each with multiple rules) are applied to the same workload, be aware of the policy. The authenticity of the token are validated before the server provides data, and it can be validated by any backend server. We will use Keycloak as an IdP. The following policy makes all workloads only accept requests that contain a Apply the peer authentication configuration to the cluster. valid JWT token. Find centralized, trusted content and collaborate around the technologies you use most. The cURL command fails with the error Recv failure: Connection reset by peer as the service proxy doesnt accept the unauthenticated connection. It will succeed! Are all constructible from below sets parameter free definable? To support `Single Sign-On` scenario, `Istio Origin Authentication If the request authentication policy is in the root namespace, First, a mechanism to validate the authenticity of Cookie is missing. This command pulls a container image with the Kubernetes version 1.23.1 and runs it on your container runtime. For example, if your runtime is docker, you can see the running container by executing docker ps. which adds a further operational burden but the size of the cookie is small and constant. See https://istio.io/latest/docs/tasks/security/authorization/authz-jwt/. Envoy differentiates itself from other proxies by being dynamically configurable through an API that it exposes. Each rule will be activated only when a token is presented at the location recognized by the Is there a reason beyond protection from potential corruption to restrict a minister's ability to personally relieve and appoint civil servants? Authentication header being removed before - Discuss Istio To see the full Considering that every service has to address these concerns, solving those on the platform layer instead of in the application code makes sense. We achieve that with the policy below. We can achieve that with the following policy: To verify that moderators can send feedback, follow these steps: open an incognito window, log in with the credentials moderator / password, type a sentence, and submit feedback. is now supported. It is also important to understand that only Pods with injected Envoy sidecar have SPIFFE workload identity and therefore is able to speak in mTLS. Connect and share knowledge within a single location that is structured and easy to search. istio storage When the Pod is running, execute a cURL request from the legacy workload to the sa-web-app workload. continuous integration The above command will port-forward Jeager to your local environment and open it in your default browser. The request to Mixer in order to determine whether the connection was allowed and what action to take. This is decisions that would otherwise require a network call to Mixer. We cover more deployment patterns in the book Istio in Action. The creation of the client application and the users is automated with the script below. The diagram below visualizes the process. redhat Holy mackerel! This capability, along with creative use of claims in JWT, also empowers authorization capability. The above command will port-forward Grafana to your local environment and open it in your default browser. automation server Does the policy change for AI-generated content affect users who (want to) Istio: HTTP Authorization: verify user is the resource owner, Configure Istio Ingress Gateway to require header token using Authorization Policy. I find myself and other Field Engineers here at Solo going back to it whenever we solve some tricky issue, such as DNS resolution, troubleshooting cross-cluster traffic, and so on. istio-ingressgateway pod is not working on remote cluster #33322 - GitHub Begin by creating a namespace and deploying keycloak into it. The animation below shows how the sidecar proxies intermediate traffic and implement retries, and failovers for failed requests. Each workload must first have an identity and Envoy proxy addressed this issue by adopting SPIFFE framework. Request authentication Istio allows end users and systems to interact with Istio microservices using request authentication. And next, we go to my favorite feature: Correlating metrics and traces, as shown below. Next, we want to allow this action only for moderators. In addition to the core features, Istio also Istio Authentication Part 2(User Authentication) | by Abirami T - Medium Traces clarify where the request failed and which service returned the error, and so on. When using AuthorizationPolicy CRD, keep in mind: For troubleshooting, we can check authorization policies effective on a Pod with: This returns the effective policies but does not necessarily indicate which rule is matched when a request is denied or allowed. If not set, the selector will match all workloads. Next, clone the repository containing the services and configuration we need throughout the article: Next, verify that the sidecar got injected into each of the service pods with the following command: Ensure that under the READY column, you see the value 2/2. In our instance, we want to route traffic from the ingress gateway to a set of workloads, as shown below. In the security section, we learned three custom resources: Hey! rev2023.6.2.43474. If possible, and it is not a non-standard approach i see, hmm so cmiiw, what you're trying to say is that i should provide the jkws approach in my auth api service, and then use the jwks.json file generated from it in the istio setup? )/ingress gateway will catch this request, and send (redirect) it over to the auth service to check first, before passing it to its destination If it's not valid then return some token error response If it is valid, then then pass it on to its original destination Can istio do this? When it is presented to Istio, Istios RequestAuthentication CRD needs the public key of the issuer in order to validate the JWT. This typically includes features such as service discovery and policy enforcement to However, any solution implementing the OpenID Connect Discovery (OIDC) standard will work the same. In our instance, well apply the Gateway configuration to the default ingress gateway, which is labeled with istio=ingressgateway. Extreme amenability of topological groups and invariant means. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. revoked by simply moving users within your provider, without any changes to the Istio configuration. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. By configuring oauth2-proxy to request different scopes, you can adjust the claims that are present Does the policy change for AI-generated content affect users who (want to) Configure Istio Ingress Gateway to require header token using Authorization Policy. End-user authentication. But fast-forward three years, and: Kubernetes, which even then was reaching wide adoption, has now become a mainstream global technology. The figure above shows the services that comprise the app: Additionally, the figure shows a layer 7 proxy that reverse-proxies traffic based on the requests path. It is possible to enable end user authentication using request authentication policies in Istio. Thus it will reuse the tracing headers (such as the x-request-id), and then itll add additional data that it records. Shows you how to use Istio authentication policy to route requests based on JWT claims. Resources that would be better spent focused on core business functionality. It is important to distinguish request authentication and user authentication. identity provider; we will be using Google here but any compatible provider should work. After reading until here, you know more about Istio than many folks out there, even some that run services on production with it. it failed to authenticate the . Playing detective might be a fun activity the first timebut it will quickly get mundane because failures are a common occurrence. The last thing you need to know is that the market lacks people with this kind of knowledge. Redis Learn more about the "Scope, Inheritance, and Overrides" of Istio configuration.