@howardjohn is there any way i can perform fault injection on https traffic. Usage. This is particularly problematic when matching filters, like istio.stats, that are version As a result, an EnvoyFilter like the one above may initially For example, if you configure mutual TLS in the cluster globally, the DestinationRule must include the following trafficPolicy: Otherwise, the mode defaults to DISABLE causing client proxy sidecars to make plain HTTP requests Automatic sidecar injection will be ignored for pods in these namespaces. Refer to the Requirements for Pods and Services (repeat for all namespaces in which the injection webhook should be invoked for new pods). I'm using the sock-shop demo to test several aspects of Istio's functionality. Another potential issue is that the route rules may simply be slow to take effect. See the Secure Gateways task for more information. This is a setup in Google's GKE. Tabularray table when is wraped by a tcolorbox spreads inside right margin overrides page borders. between the reviews:v2 and ratings microservices for user jason. Now, if you are an administrator working in a production Kubernetes cluster, you'd be horrified at the idea of injecting faults in a live production . Consider the following configuration: You would expect that given the configured five retry attempts, the user would almost never see any Have a question about this project? Direct encrypted traffic from IBM Cloud Kubernetes Service Ingress to Istio Ingress Gateway. specific (i.e., that include the proxyVersion field in their match criteria). request routing task or by When nginx is accessed from this sleep pod using its Pod IP (this is one of the common ways to access a headless service), the request goes via the PassthroughCluster to the server-side, but the sidecar proxy on the server-side fails to find the route entry to nginx and fails with HTTP 503 UC. @howardjohn Any existing tools which you recommend for injecting faults to tls traffic? The gateway will be applied to the proxy running on a pod with labels app: my-gateway-controller. You expect the Bookinfo home page to load without errors in approximately Does a 120cc engine burn 120cc of fuel a minute? Fault injection. Due to the fact that the sidecar container mounts a local storage volume, the Allowed policy values are disabled and enabled. I'm running istio version 1.2 and have my outboundTrafficPolicy.mode set to ALLOW_ANY. propagation will take longer and there may be a lag time on the network namespace is shared. This can cause application containers to hang or restart if the istio-proxy sidecar container is not ready. for details. The reviews:v3 service reduces the reviews to ratings timeout from 10s to 2.5s namespace. OS: Windows 10 Enterprise. By default, access logs are output to the standard output of the container. Label value Notice that the fault injection test is restricted to when the logged in user is jason. Configure Istio ingress gateway to act as a proxy for external services. The new version contains exciting experimental features, numerous enhancements, as well as deprecations and removals. Fault injection is part of Istio's routing configuration and can be set in the fault field under an HTTP route of the VirtualService Istio custom resource. The access logs may also show an error like 400 DPE. Istio / Traffic Management Problems Documentation Operations Common Problems Traffic Management Problems Traffic Management Problems 15 minute read Requests are rejected by Envoy Route rules don't seem to affect traffic flow 503 errors after setting destination rule Route rules have no effect on ingress gateway requests Envoy is crashing under load filter chain of the sidecars. Specifying the Host header as nginx.default in our request to nginx successfully returns HTTP 200 OK. Set port name to tcp or tcp-web or tcp-: Here the protocol is explicitly specified as tcp. order of seconds. HTTP Abort : This specification deals with immediate abortion of a request and return a predefined status code. same VirtualService. To fix this, you should switch the virtual service to configure tls routing: Alternatively, you could terminate TLS, rather than passing it through, by switching the tls configuration in the gateway: When configuring Istio to perform TLS origination, you need to make sure I have a similar problem here as well, ISTIO 1.4.3, I'm trying to blacklist an HTTPS-accessible URI prefix with a NOT-FOUND/404. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Create a fault injection rule to delay traffic coming from the test user To learn more, see our tips on writing great answers. @kyessenov commented on Mon Oct 09 2017 Context: production readiness proposal and plan The feature "fault injection" is identified as incomplete test coverage. and then redirect requests to targetPort 443 for the TLS origination: Configuring more than one gateway using the same TLS certificate will cause browsers Using Meshery, navigate to the Istio management page: Enter default in the Namespace field. For example, adding priority: 10 to the above filter will ensure Service Entry. You can observe that the HTTP route is not applied using We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. In computer science, fault injection is a testing technique for understanding how computing systems behave when stressed in unusual ways. a known issue. In this example, the gateway is terminating TLS while the virtual service is using TLS based routing. For example, lets say you have 2 hosts that share the same TLS certificate like this: Since both gateways are served by the same workload (i.e., selector istio: ingressgateway) requests to both services By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Sign in calls to the ratings service. jason. Fault Injection - delays and aborts not working in Istio Ask Question 0 I've configured Istio to delay/abort http-traffic with 30 seconds to my catalogue-service, yet when i refresh my page, the catalogue shows without any delays. Making statements based on opinion; back them up with references or personal experience. Therefore you It looks like this was resolved with no follow up. Jobs are deployed as part of the istio-init Helm Chart to install the CRDs. that the application sends plaintext requests to the sidecar, which will then originate the TLS. Istio 1.8 has just been released and is one of the best Istio releases so far. The gateway terminates TLS while the virtual service configures TLS routing. Istio's fault injection rules help you identify such anomalies without impacting end users. Do you have any suggestions for improvement? traffic are within the pod. Injection is fail-close. Run the following command to see the log: In the default access log format, Envoy response flags are located after the response code, We are running in the same issue as we want to test our application circuit breaking settings by returning just 500 (as example above) from google API instead of the real response. Another way to test microservice resiliency is to introduce an HTTP abort fault. One workaround is to remove the proxy settings from the kube-apiserver manifest, another workaround is to include istio-sidecar-injector.istio-system.svc or .svc in the no_proxy value. Then, simply bind both VirtualServices to it like this: An HTTPS Gateway that specifies the hosts field will perform an SNI match on incoming requests. It doesn't seem to work. I'm using the sock-shop demo to test several aspects of Istio's functionality. x509: certificate signed by unknown authority errors are typically I wasn't able to get this to work with the "Accessing External Services" example (https://istio.io/docs/tasks/traffic-management/egress/egress-control/) or with my own project. I've been testing with https://www.google.com. This causes the sidecar injector to inject the sidecar at the start of the pods container list, and configures it to block the start of all other containers until the proxy is ready. Apply service entry to external service (say, https://www.google.com). . You should only see this error if you disabled. Note that the reviews:v2 service has a 10s hard-coded connection timeout for Fixing the bug You would normally fix the problem by: [ ] Developer Infrastructure. Another common issue is load balancers in front of Istio. So far it was not possible to convert an HTTP request to an HTTPS request. If you login as any other user, you would not experience any delays. The workaround is Looking at envoy logs, it looks like the mesh is recognizing requests to the https route, but I haven't been able to apply any fault injection rules to it. First, we will test the resiliency of the application by injecting an HTTP delay fault. Note this example can be applied against the bookinfo Istio sample application.. To run it, simple set the KUBERNETES_CONTEXT environment variable to the target cluster and ensure your local kubeconfig is properly populated for that context. Below is an example of using this extension to inject a delay of 5 seconds to a specific user. Before starting this tutorial, you will need a small idea of Istio resiliency Fault Injection feature. That can be a great tool to test your app for operational readiness and resilience. the Envoy sidecar will attempt to parse the request as HTTP while forwarding the request, Version (include the output of istioctl version --remote and kubectl version) Where is it documented? Bug description 7 seconds. Install Multi-Primary on different networks, Install Primary-Remote on different networks, Install Istio with an External Control Plane, 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, Stopping and restarting the fixed microservice. https://istio.io/docs/tasks/traffic-management/egress/egress-control/, Apply a service entry to some https host, say, Apply a fault injection virtual service to the same host, From within a sidecar-injected pod, curl the host you set up the service entry for. [ ] Security Connect and share knowledge within a single location that is structured and easy to search. (i.e., most browsers) to produce 404 errors when accessing a second host after a Find centralized, trusted content and collaborate around the technologies you use most. will need to set the proxy_http_version directive in your NGINX configuration to be 1.1, since the NGINX default is 1.0. The TLS route rules will have no effect since the TLS is already terminated when the route rules are evaluated. instead of TLS encrypted requests. still expect the end-to-end flow to continue without any errors. For example, your VirtualService looks something like this: You also have a VirtualService which routes traffic for the helloworld service to a particular subset: In this situation you will notice that requests to the helloworld service via the ingress gateway will This is useful in certain scenarios where a client may not be able to include header information in the request. In Istio, fault injection is a way to introduce problems in your architecture deliberately to understand how your system and organizational process will respond when it happens in real life. In this post, we'll review what's new in Istio 1.8, and highlight a few potential snags to look out for when . If you are not planning to explore any follow-on tasks, refer to the After that is done, when curling from inside a sidecar-injected pod, expect to see the specified fault, say a 500 response. to propagate to all the sidecars. If you migrate all traffic to reviews:v3 as described in the NAME READY STATUS RESTARTS AGE. @howardjohn Hi, we've encountered the same problem here. The Red Hat OpenShift Cluster Manager application for OpenShift Container Platform allows you to deploy OpenShift clusters to either on-premise or cloud environments. [ ] Installation It should be done with Istio instead of deploying an extra app. Open the product page URL in a browser and refresh a number of times.. My current setup is as follows: This is my yaml-file containing all the services and deployments (shortened to the configuration of Catalogue and the front-end, which uses the catalogue): This is the destinationrule for my catalogue: And this is the virtualservice, which includes the fault-injection: Seems like it was a mistake on my part. Fault Injection. (service1.test.com and service2.test.com) will resolve to the same IP. I've added destinationrules and virtualservices for ALL my services, and this seems to produce the correct results. With this feature, you can use application-layer fault injection instead of killing pods, delaying packets, or corrupting packets at the TCP layer. The istio version is 1.2.5, the envoyproxy version it uses is 1.11.0-dev. sidecar.istio.io/inject label in the pod template specs metadata. I deployed the yaml file below, but I am getting a response in a very short time when member service is getting aborted with 500 kind: VirtualService metadata: name: retry-member spec: hosts: . If you login as any other user, you will not experience any delays. i am using istio 1.6.5. For example, sending a request like curl https://httpbin.org will result in an error: . I'm able to successfully apply rules internally and to http routes, but it isn't working for https. Tcpdump doesnt work in the sidecar pod - the container doesnt run as root. Notice that we are restricting the failure impact to user "jason" only. There are hard-coded timeouts in the microservices that have Sending an HTTPS request like curl https://httpbin.org, which defaults to port 443, will result in an error like 1980s short story - disease of self absorption, Penrose diagram of hypothetical astrophysical white hole. download and install 1.7.4 release version of Istio label the default namespace to enable automatic proxy injection install and expose the book info app from the Istio samples directory. Istio defines two types of faults injection: Delays: Delays are timing failures such us network latency or overloaded upstreams. traffic shifting task, you can then The default policy can be overridden with the So I think it cannot be safely changed. However, starting in Istio 1.8, you can expose HTTP port 80 to the application (e.g., curl http://httpbin.org) Setup Istio by following the instructions in the Installation guide.. Notice that the fault injection test is restricted to when the logged in user is jason. With large deployments the Whenever you apply a DestinationRule, ensure the trafficPolicy TLS mode matches the global server configuration. Only internal requests with the host helloworld.default.svc.cluster.localwill use the ; deploy BookInfo application (istio-step-by-step-part-12-deploying-istio-bookinfo-application . Automatic sidecar injection will be ignored for pods that are on the host network. Install Multi-Primary on different networks, Install Primary-Remote on different networks, Install Istio with an External Control Plane, 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, The result of sidecar injection was not what I expected, Automatic sidecar injection fails if the Kubernetes API server has proxy settings, Pod or containers start with network issues if istio-proxy is not ready, https://github.com/kubernetes/kubernetes/pull/58698#discussion_r163879443. Currently, Istio does not support configuring fault injections and retry or timeout policies on the If you see the "cross", you're on the right track. The text was updated successfully, but these errors were encountered: This is expected, as https is treated as raw tcp in envoy. Fault Injection - delays and aborts not working in Istio. that the end-to-end flow continues without any errors. Monitor service mesh. Something can be done or not a fit? reviews:v2 and ratings services have 10 seconds of hard-coded connection timeout for calls to the ratings service. Is it appropriate to ignore emails from a student asking obvious questions? Using Kiali with Istio Fault Injection. istioctl create -f samples/apps/bookinfo . A fault rule must have either a delay or abort (or both). Create a fault injection rule to send an HTTP abort for user jason: On the /productpage, log in as user jason. Many applications execute commands or checks during startup, which require network connectivity. Here is the setup : ingress -> service-a fault.yaml (here is the fault rule for service-a) apiVersion: config.istio.io/v1alpha2 kind: RouteRule metadata: name: ratings-delay-abort spec: destinat. If route rules are working perfectly for the Bookinfo sample, How can I use a VPN to access a Russian website that is banned in the EU? Do non-Segwit nodes reject Segwit transactions with invalid signature? webhook is scoped to opt-in or opt-out for the target namespace. Envoy requires HTTP/1.1 or HTTP/2 traffic for upstream services. Istios fault injection rules help you identify such anomalies recommendation-v1-798bf87d96-d9d95 2/2 Running 0 1h. https://github.com/kubernetes/kubernetes/pull/58698#discussion_r163879443. default destination rules. In this task, you will introduce an HTTP abort to the ratings microservices for and fault injection. Before we start, we will need to reset the virtual services. that leverage HTTP/2 connection reuse I'm trying to apply fault injection rules to external services that my cluster is accessing. You signed in with another tab or window. 10.1.1.171 is the Pod IP of one of the replicas of nginx and the service is accessed on containerPort 80. or replaced by newer ones when upgrading Istio. The rubber protection cover does not pass through the hole in the rim. istiod pods. Trying to inject faults to an external service with ServiceEntry and a VirtualService via HTTPS but no way of doing it. It supports managing traffic flows between services, enforcing access policies, and. Faults include aborting HTTP requests from a downstream service, and/or delaying the proxying of requests. including all route rules. @howardjohn Was there any resolution to this issue? However any other container in the same pod will see all the packets, since the [ ] Policies and Telemetry Here are the yaml files that I'm trying to use. No luck so far with the Istio failure injection so far. be working perfectly but after upgrading Istio to a newer version it will no longer be included in the network errors when calling the helloworld service. are caused by incorrect TLS configuration. caused by an empty caBundle in the webhook configuration. How to connect 2 VMware instance running on same Linux host machine via emulated ethernet cable (accessible via mac address)? Refer to the Envoy response flags will uncover a bug that was intentionally introduced into the Bookinfo app. $ kubectl label namespace istio-system istio-injection = disabled --overwrite (repeat for all namespaces in which the injection webhook should be invoked for new pods) $ kubectl label namespace default istio-injection = enabled --overwrite Check default policy Check the default injection policy in the istio-sidecar-injector configmap. Here web-0 is the pod name of one of the 3 replicas of nginx. and the errors continue until you remove or revert the DestinationRule, then the DestinationRule is probably Yes, the user is trying to apply config for http routing but they are sending https traffic. If your application sends an HTTPS request to a service declared to be HTTP, Did neanderthals need vitamin C from the diet? Such filters may be removed Review the fault injection discussion in the Communication between Envoy and the app happens on 127.0.0.1, and is not encrypted. Verify the application pods namespace is labeled properly and (re) label accordingly, e.g. I've configured Istio to delay/abort http-traffic with 30 seconds to my catalogue-service, yet when i refresh my page, the catalogue shows without any delays. Browsers like Chrome and Firefox will consequently reuse the existing connection for requests to service2.test.com. However, you already have a fix running in v3 of the reviews service. Multi-Mesh Deployments for Isolation and Boundary Protection. This can be added as a global config option: Do you have any suggestions for improvement? I've tried again with the same configurations as posted in the original question, and it works now. Notice that the fault injection test is restricted to when the logged in user is jason. The default policy I tried this task with Abort https://preliminary.istio.io/docs/tasks/traffic-management/fault-injection.html I see service not available even when I am not logged in . By clicking Sign up for GitHub, you agree to our terms of service and No License, Build available. Install Istio with the Istio CNI plugin Tasks Traffic Management Request Routing Fault Injection Traffic Shifting TCP Traffic Shifting Request Timeouts Circuit Breaking Mirroring Ingress Ingress Gateways Secure Gateways (File Mount) Secure Gateways (SDS) Ingress Gateway without TLS Termination Kubernetes Ingress with Cert-Manager Egress This is Notice that the fault injection test is restricted to when the logged in user is. Installation guide. 3 comments Janesee3 commented on Nov 19, 2020 edited by istio-policy-bot istio-policy-bot added the area/networking label istio-policy-bot closed this as completed These jobs should take less than 20 seconds to complete. caused the reviews service to fail. if you are using a custom log format, make sure to include %RESPONSE_FLAGS%. privacy statement. to If not specified, none of the requests will be aborted. To control the traffic from the gateway, you need to also include the subset rule in the myapp VirtualService: Alternatively, you can combine both VirtualServices into one unit if possible: Check your ulimit -a. Fixing the bug You would normally fix the problem by: For example, the following Gateway configuration sets up a proxy to act as a load balancer exposing port 80 and 9080 (http), 443 (https), 9443 (https) and port 2379 (TCP) for ingress. Deploy the BookInfo sample application.. Initialize the application version routing by either first doing the request routing task or by running following commands:. You can avoid this problem by configuring a single wildcard Gateway, instead of two (gw1 and gw2). With this misconfiguration, you will end up getting 404 responses because the requests will be Traffic Management concepts doc. The following example introduces a 5 second delay in 10% of the requests to the ratings:v1 microservice: apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: ratings spec: hosts: - ratings http: - fault: delay: percent: 10 . to your account. Already on GitHub? Kubernetes services must adhere to certain restrictions in order to take advantage of To avoid this issue, you can either change the operation to one that does not depend on the presence of Assume Istio is installed with the following configuration: Consider nginx is deployed as a StatefulSet in the default namespace and a corresponding Headless Service is defined as shown below: The port name http-web in the Service definition explicitly specifies the http protocol for that port. Fault Injection - Istio By Example Fault Injection Adopting microservices often means more dependencies, and more services you might not control. NOTE: HTTP Delay : This specialization deals with injection of latency into the request forwarding path. It also means more requests on the network, increasing the possibility for errors. A request to nginx with or without explicitly setting the Host header successfully returns HTTP 200 OK. root certificate mounted in the istiod pod. In this case, you expect the page to load immediately and display the Ratings service is currently unavailable message. encrypted requests. It doesn't work. try to change the delay rule to any amount less than 2.5s, for example 2s, and confirm rev2022.12.9.43105. With this configuration, the sidecar expects the application to send TLS traffic on port 443 I was successfully able to create the filter but it does not seem to have any effect. The Fault Injection Panel allows us to inject faults to test the resiliency of a Service. HTTP Connection Manager is not used at all and therefore, any kind of header is not expected in the request. for any indication about why the webhook pod is failing to start and I followed this document to create the filter. While Istio will configure the proxy to listen on these ports . Configure the IBM Cloud Kubernetes Service Application Load Balancer to direct traffic to the Istio Ingress gateway with mutual TLS. which will fail because the HTTP is unexpectedly encrypted. Deploy the Bookinfo sample application including the It's not a question of Istio versus Envoy or Istio versus Kubernetesthey often work together to make a microservices-based containerized environment operate smoothly. For example, when using NGINX for serving traffic behind Envoy, you inject the fault to the upstream Envoy proxy using EnvoyFilter instead: This works because this way the retry policy is configured for the client proxy while the fault rate. Fault injection works on its own and retries work on their own as expected, but not the two combined. I did some analysis and found over 10% of fault configs in live clusters are NOT setting percentage. curl: (35) error:1408F10B:SSL routines:ssl3_get_record:wrong version number. There will be nothing in the [ ] Performance and Scalability [1] Widely studied physical fault injections include the application of high voltages, extreme . Looking at envoy logs, it looks like the mesh is recognizing requests to the https route, but I haven't been able to apply any fault injection rules to it. Verify the caBundle in the mutatingwebhookconfiguration matches the Expected behavior QGIS expression not working in categorized symbology. Deploy environments that require isolation into separate meshes and enable inter-mesh communication by mesh federation. false forces the sidecar to not be injected. If the pods or endpoints arent ready, check the pod logs and status Gain deep understanding of how service performance impacts matters upstream with the robust tracing, monitoring, and logging . Bugs like this can occur in typical enterprise applications where different teams Check the default injection policy in the istio-sidecar-injector configmap. Unrecognized policy causes injection to be disabled completely. Then apply a fault injection virtual service. the same VirtualService, the retry configuration does not take effect, resulting in a 50% failure (which does not call ratings at all) for everybody but jason. When the Kubernetes API server includes proxy settings such as: With these settings, Sidecar injection fails. I then have a retry policy that retries 1,000 times (complete overkill), so that if 8 out of 10 calls fail, I then retry up to a 1,000 times until I get a 200OK . The best way to understand why requests are being rejected is typically be captured in the event log. another filter (e.g., INSERT_FIRST), or set an explicit priority in the EnvoyFilter to override the The namespaceSelector for opt-out will look like the following: The injection webhook will be invoked for pods created in namespaces If the rule propagated successfully to all pods, the page loads to shutdown the application. Failure to invoke the injection webhook will If the istio-sidecar-injector pod is not ready, pods The following DestinationRule originates TLS for requests to the httpbin.org service, Enable Istio automatic proxy sidecar injection. Configure the cloud load balancer to instead passthrough the TLS connection. helloworld VirtualService which directs traffic exclusively to subset v1. version distribution to be observed. This includes an injected sidecar when it wasnt expected and a lack Ensure your pod does not have hostNetwork: true in its pod spec. The following label overrides whatever the default policy was node autoscaler is unable to evict nodes with the injected pods. Requests may be rejected for various reasons. Open the Bookinfo web application in your browser. connection to another host has already been established. As a measure to reach Istio producti. Comparison of alternative solutions to control egress traffic including performance considerations. because the timeout between the reviews and ratings service is hard-coded at 10s. algorithm to ensure all Envoy sidecars have the correct configuration Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. but similar version routing rules have no effect on your own application, it may be that Istios L7 routing features. A configuration change will take some time (e.g., curl https://httpbin.org), but it will also perform TLS origination before forwarding requests. When would I give a checkpoint to my D&D party that they can return to if they die? The only related failure log can be found in kube-apiserver log: Make sure both pod and service CIDRs are not proxied according to *_proxy variables. Most cloud load balancers will not forward the SNI, so if you are terminating TLS in your cloud load balancer you may need to do one of the following: A common symptom of this is for the load balancer health checks to succeed while real traffic fails. Istio's fault injection rules help you identify such anomalies without impacting end users. injection is configured for the upstream proxy. Before you begin. of true forces the sidecar to be injected while a value of Let us assume we have a sleep pod Deployment as well in the default namespace. than it. Ready to optimize your JavaScript with Rust? Fault injection, in the context of Istio, is a mechanism by which we can purposefully inject some issues within our mesh to mimic how our application would behave in case it encounter such problems. Not the answer you're looking for? For these reasons, it's important to test your services' behavior when upstream dependencies fail. error log to indicate that this filter has not been added to the chain. This task shows how to inject delays and test the resiliency of your application. [ ] User Experience This test The core focus of the release, however, is to increase operational stability. Make sure that kube-apiserver is restarted after each workaround. for details of response flags. Istio's fault injection rules help you identify such anomalies without impacting end users. Do you have any suggestions for improvement? and this can lead to routing failures at the host level. Get the gateway URL of /productpage from the script output. window (or in another browser), you will see that /productpage still calls reviews:v1 @rcaballeromx I'm trying to do the same thing. coded as 3s + 1 retry for 6s total. the test user jason. Not with TLS nor HTTPS as protocol label in the ServiceEntry: Fault Injection on External Https Service Not Working, connect-failure,refused-stream,unavailable,cancelled,resource-exhausted,retriable-status-codes,gateway-error,500. to force the sidecar to be injected: Run kubectl describe -n namespace deployment name on the failing To subscribe to this RSS feed, copy and paste this URL into your RSS reader. For example, the following configuration would only allow requests that match *.example.com in the SNI: For example, if you do not have DNS set up and are instead directly setting the host header, such as curl 1.2.3.4 -H "Host: app.example.com", no SNI will be set, causing the request to fail. The CA certificate should match. Asking for help, clarification, or responding to other answers. At what point in the prequels is it revealed that Palpatine is Darth Sidious? With the current Envoy sidecar implementation, up to 100 requests may be required for weighted like curl http://httpbin.org:443, because TLS origination does not change the port. generally port 443 is dedicated for HTTPS traffic. Example: ulimit -n 16384. How can I fix it? You can confirm this using the istioctl proxy-config routes command. To fix this, you should change the port protocol to HTTPS: There are two common TLS mismatches that can occur when binding a virtual service to a gateway. Let's verify that we have the correct number of Istio CRDs installed. You cannot do http level operations on tls traffic. This can be achieved using physical- or software-based means, or using a hybrid approach. [X] Docs Any thoughts? by inspecting Envoys access logs. which will activate the rules in the myapp VirtualService that routes to any endpoint of the helloworld service. For pods on the host network this assumption is violated, kandi ratings - Low support, No Bugs, No Vulnerabilities. Config: Copy 1apiVersion: networking.istio.io/v1alpha3 2kind: VirtualService 3metadata: 4 name: reviews Even with the 7s delay that you introduced, you of injected sidecar when it was. Otherwise, the INSERT_BEFORE operation will be silently ignored. Ensure your pod is not in the kube-system or kube-public namespace. to add a pod annotation "cluster-autoscaler.kubernetes.io/safe-to-evict": "true" to the injected pods. Set up Istio by following the instructions in the I'm able to successfully apply rules internally and to http routes, but it isn't working for https. The sidecar model assumes that the iptables changes required for Envoy to intercept To enable Istio automatic sidecar injection, the namespace to be used by an application must be labeled with istio-injection=enabled. develop different microservices independently. kubectl get pods -l app=recommendation. Affected product area (please put an X in all that apply), [ ] Configuration Infrastructure What's the \synctex primitive? Why is the federal judiciary of the United States divided into circuits? Many traffic management problems A standard API for service mesh, in Istio and in the broader community. Using "fault.abort.httpStatus:404" for the uri-prefix-match in ISTIO VirtualServer leads from external request perspective to too-many-redirects. If they do not, restart the This will cause the requests to be double encrypted. Are defenders behind an arrow slit attackable? However, there is also a hard-coded timeout between the productpage and the reviews service, Injecting HTTP delay fault; Injecting HTTP abort fault; Injecting HTTP delay fault. Chaos Engineering is only effective when you know your application can take failures, otherwise, there is no point in testing for chaos if you know your application is definitely broken. cannot be created. but the corresponding ServiceEntry defines the protocol as HTTPS on port 443. will not see any error message. The ingress requests are using the gateway host (e.g., myapp.com) Multicluster Istio configuration and service discovery using Admiral. ? Fixing the bug You would normally fix the problem by: Cloud: Azure Kubernetes Service immediately and the Ratings service is currently unavailable message appears. I configured a virtual service and a service entry to route the traffic to the external service. To fix this problem, you should switch the virtual service to specify http routing, instead of tls: In this configuration, the virtual service is attempting to match HTTP traffic against TLS traffic passed through the gateway. serve traffic. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. the istioctl proxy-config listener and istioctl proxy-config route commands. Istio enables fault injection to test the resiliency of your application. recommendation-v2-7bc4f7f696-d9j2m . You can fix this example by changing the port protocol in the ServiceEntry to HTTP: Note that with this configuration your application will need to send plaintext requests to port 443, Click the (+) icon on the Apply Custom Configuration card and paste the configuration below. Check the kube-apiserver files and logs to verify the configuration and whether any requests are being proxied. Authorization Policy ConditionsSupported Conditions Istio IBM Lyft Istio in namespaces with the istio-injection=enabled label. 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(35) error:1408F10B:SSL routines:ssl3_get_record:wrong version number. I'm running istio version 1.2 and have my outboundTrafficPolicy.mode set to ALLOW_ANY. [X] Networking Refer to this traffic routing page for some additional information on headless services and traffic routing behavior for different protocols. If you login as any other user, you will not experience any delays. This will result in the virtual service configuration having no effect. However, there is a problem: the Reviews section displays an error If he had met some scary fish, he would immediately return to the surface, Is it illegal to use resources in a University lab to prove a concept could work (to ultimately use to create a startup). causing a TLS conflict for the service. Bookinfo cleanup instructions Automating Istio configuration for Istio deployments (clusters) that work as a single mesh. I'll post an answer once i've found out which virtualservices/destinationrules contribute to the correct behavior. without the istio-injection=disabled label. However since both fault and retries are configured on If you login as any other user, you will not experience any delays. [ ] Test and Release Label the default namespace to enable Istio sidecar injection. iptables will also see the pod-wide configuration. Then we can install Istio CRDs on our AKS by using the next command: helm install istio.io/istio-init --name istio-init --namespace istio-system. The namespaceSelector for opt-in will look like the following: The injection webhook will be invoked for pods created If service1.test.com is accessed first, it In this case, only the TCP Proxy network filter on the sidecar proxy is used both on the client-side and server-side. Walkthrough of using Fault injection testing on Istio -- https://istio.io/docs/tasks/fault-injection.html In that case, should we change the wording in the documentation from If not specified, all requests are aborted. I've tried to set the name of the service entry as the destination as you suggested. To work around this issue, you may remove the fault config from your VirtualService and Output of istioctl version --remote, Environment where bug was observed (cloud vendor, OS, etc) The Istio implementation on Kubernetes utilizes an eventually consistent Check the webhooks namespaceSelector to determine whether the An issue was filed with Kubernetes related to this and has since been closed. In such cases youll see an error about no endpoints available. An EnvoyFilter configuration that specifies an insert position relative to another filter can be very A specific instance of a headless service can also be accessed using just the domain name. OpenShift Container Platform 4.10 is supported on Red Hat Enterprise Linux (RHEL) 8.4 and 8.5, as well as on Red Hat Enterprise Linux CoreOS (RHCOS) 4.10. I checked istio config dump but I couldn't find my filter there, so I think my filter configuration is wrong. Well occasionally send you account related emails. Istio's fault injection rules help you identify such anomalies without impacting end users. message: Youve found a bug. @mrtalley IMO the problem can also be in the value you used for host in the routing rule: Have you tried using the name of the service entry instead? If requests to a service immediately start generating HTTP 503 errors after you applied a DestinationRule your Kubernetes services need to be changed slightly. Apply application version routing by either performing the Although the above configuration may be correct if you are intentionally sending plaintext on port 443 (e.g., curl http://httpbin.org:443), The deployments metadata is ignored. Actually, i've just managed to get some progress on this. Istio is an open service mesh that provides a uniform way to connect, manage, and secure microservices. Here are some of the ways to avoid this 503 error: The Host header in the curl request above will be the Pod IP by default. To avoid this, set holdApplicationUntilProxyStarts to true. The following sections describe some of the most common misconfigurations. default creation time-based ordering. Implement istio-fault-injection with how-to, Q&A, fixes, code snippets. fragile because, by default, the order of evaluation is based on the creation time of the filters. Instead, you can set up DNS or use the --resolve flag of curl. Thus, the requests conflict with the server proxy because the server proxy expects only applies if the webhooks namespaceSelector matches the target not be directed to subset v1 but instead will continue to use default round-robin routing. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The gateway does TLS passthrough while the virtual service configures HTTP routing. Thanks for contributing an answer to Stack Overflow! running the following commands: With the above configuration, this is how requests flow: To test the Bookinfo application microservices for resiliency, inject a 7s delay that it is processed after the istio.stats filter which has a default priority of 0. will return the wildcard certificate (*.test.com) indicating that connections to service2.test.com can use the same certificate. I have a fault that is injected 80% of the time. This task shows you how to inject faults to test the resiliency of your application. Confirm the ISTIO-INJECTION column shows it has been enabled. Allow several seconds for the new rule to propagate to all pods. Open the Developer Tools menu (F12) -> Network tab - web page actually loads in about 6 seconds. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, GKE with Ingress setup always gives status UNHEALTHY, Getting "cannot init crypto" while deploying hyperledger fabric peer to Kubernetes, Pod deletion causes errors when using NEG, Retries not working with fault injection in Istio, Istio side car external storage mounting issue, You're speaking plain HTTP to an SSL-enabled server port in Kubernetes. If you log out from user jason or open the Bookinfo application in an anonymous so that it is compatible with (less than) the timeout of the downstream productpage requests. As a result, the productpage call to reviews times out prematurely and throws an error after 6s. This is a setup in Google's GKE. pods deployment. i am able to perform fault inject for http traffic. without impacting end users. Set also the PRODUCT_PAGE_SERVICE_BASE_URL to the . Lets assume you are using an ingress Gateway and corresponding VirtualService to access an internal service. Secure Control of Egress Traffic in Istio, part 3. Consider a filter with the following specification: To work properly, this filter configuration depends on the istio.stats filter having an older creation time As expected, the 7s delay you introduced doesnt affect the reviews service On the /productpage web page, log in as user jason. Many systems have a 1024 open file descriptor limit by default which will cause Envoy to assert and crash with: Make sure to raise your ulimit. sent to HTTP routing but there are no HTTP routes configured. Since the gateway (gw1) has no route for service2.test.com, it will then return a 404 (Not Found) response. I defined a fault injection rule: type: route-rule name: frontend-rule spec: destination: frontend.default.svc.cluster.local httpFault: delay: percent: 100 fixedDelay: 5s This doesn't seem to work when going through ingress, although oth.