kubernetes not listening on 8080kubernetes not listening on 8080

NodePort are well exposed as netstat can show on all nodes but Node Port is not responding on Node whe the pod is not running. Similarly, a web server that listens on TCP port 80 of all its IPv4 addresses usually reports that it is listening on http://0.0.0.0:80. I don't know. will that work for you? Could this be related to the operating system? rev2023.7.24.43543. Already on GitHub? means: your application is telling you that it is listening on TCP port 80 on all IPv6 addresses it owns. To learn more, see our tips on writing great answers. LoadBalancer A TCP load-balancer is offered by most managed clouds, you can allocate a port such as 8080, 443, etc and have a piece of infrastructure created to allow access to your Service. It is the same for core-dns Pod with cluster IP. 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. Create a new NetworkPolicy named allow-port-from-namespace that allows Pods in the existing namespace internal to connect to port 80 of other Pods in the same namespace. What is the fix for this? authentication { /lifecycle stale. BTW, does externally this nodePort works? That's why they won't show up in your netstat. @kennethredler It is just my opinion based on the customer environments we are working with, and the problems we met and resolved. What does localhost means inside a Docker container? Find centralized, trusted content and collaborate around the technologies you use most. Anthology TV series, episodes include people forced to dance, waking up from a virtual reality and an acidic rain. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What is the audible level for digital audio dB units? For some reason that I dont have time to investigate at the moment, this solution did not work for me. auth_pass 42 https://kubernetes.io/docs/concepts/services-networking/service/#external-ips. 3 nodes Centos 8 AppStream with 3 network cards : 1st network card with classic configuration and default routes I do nt understand what to do to solve this problem I think the default gateway configured in cluster node should be a pre-requirement of deploying Kubernetes cluster. You can run a tcpdump on the node where the Pod behind the nodePort is running and see if a packet arrives there. How can kaiju exist in nature and not significantly alter civilization? state MASTER By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To learn more, see our tips on writing great answers. In other words you've created a Service like the one below: apiVersion: v1 kind: Service metadata: name: testpod spec: ports: - protocol: TCP port: 8080 targetPort: 8080. If you used Ubuntu and it worked, then it is not related to the ingress-nginx itself. returns a route; and if it fails instructs the user to either set up a default gateway or a dummy route. auth_type PASS Description /kind bug I used containerd as the remote runtime for my kubernetes cluster. Both the services were running on 0.0.0.0:18080 and 0.0.0.0:8080 respectively within the container/ pod and it took me a week to find this setting. It can be closed. Does glide ratio improve with increase in scale? Kubernetes services are not implemented as processes listening on a specific port. Use Port Forwarding to Access Applications in a Cluster - Kubernetes You can try to call your service from another pod (which runs busy box, for example) with curl http://traefik.kube-system.svc.cluster.local or http://. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, Kubernetes nodeport not visible as listening on host but service working, What its like to be on the Python Steering Council (Ep. Choose loopback as the default experience Make it complicated to say "upgrade from loopback to machine hosting on the default port". state BACKUP unicast_src_ip 192.168.0.232 Already on GitHub? NodePort is reachable on the Node where the pod is hosted, not on the Other Node. Can I spin 3753 Cruithne and keep it spinning? You chose NodePort which means that every node of the cluster listens for requests on a specific port (in your case 31822 for http and 32638 for https) which will then be delegated to your service. Host network - Force the pod to use the host's network instead of a dedicated network namespace. The kubernetes/ingress-nginx static deploys have a deploy.yaml with a . kubectl expose pod testpod --port=8080. Here are all the flags I'm setting: Issues go stale after 90d of inactivity. Find centralized, trusted content and collaborate around the technologies you use most. } Not the answer you're looking for? inet 192.168.0.233/24 scope global ens161 Conclusions from title-drafting and question-content assistance experiments Kubernetes node port can't expose successfully, Kubernetes error: Unable to connect to the server: dial tcp 127.0.0.1:8080, Kubernetes cluster on AWS,The connection to the server localhost:8080 was refused, Kubernetes - Container is not accessible using node port, Unable to access NGINX nodePort service in K8 cluster running on RPI, Why can I not use port 80 when using K3s Kubernetes, Digital Ocean Kubernetes: Nodeport not accessible from browser, Getting Connection refused while trying to access service from kubernetes pod, Not able to access Nginx from an external IP even after k8s nodeport service exposed. Debugging in ipvs mode is easier than in iptables (at least, for me!) mode http About misfuntionnal masquerading, I have revese path filtering on all interface enabled, so no problem with asymetric routing. Introduction The idea of a Service is to group a set of Pod endpoints into a single resource. In that case you cannot use a service type=LoadBalancer. For example: "Tigers (plural) are a wild animal (singular)". when I run a pod with the config. virtual_router_id 50 HI @wxq851685279. To see all available qualifiers, see our documentation. Access service via custom HTTPS port using nginx-ingress, How to set up ingress in Kubernetes for http and https backend, Serving HTTP/HTTPS service which is outside of Kubernetes cluster through Ingress, Kubernetes: communicate internal services using HTTPS, Kubernetes routing HTTPS traffic to external HTTP services, Kubernetes expose a service on a port over tls, Release my children from my debts at the time of my death. Well occasionally send you account related emails. This could mean that the kubeadm tool which you used to install Kubernetes on your machine, did not complete the installation successfully. This page provides an overview of controlling access to the Kubernetes API. Is not listing papers published in predatory journals considered dishonest? Is it possible to expose Kubernetes service using port 443/80 on-premise? Kubeadm works fine and joining the cluster is OK. Why is a dedicated compresser more efficient than using bleed air to pressurize the cabin? i am working on POC, added "hostNetwork: true" to ingress controller deployment manifest. auth_pass 42 Is saying "dot com" a valid clue for Codenames? link/ether 00:50:56:06:6f:da brd ff:ff:ff:ff:ff:ff auth_pass 42 However, I tested this locally and could not get the app to respond. Is it a concern? This is why http://node-ip-addr:31822 should work for your provided service config. Node Port not exposed on all nodes of the cluster #100434 - GitHub Why is this Etruscan letter sometimes transliterated as "ch"? My bechamel takes over an hour to thicken, what am I doing wrong. (Bathroom Shower Ceiling). 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. Choose port 80 as the default Docker experience You signed in with another tab or window. 592), How the Python team is adapting the language for an AI future (Ep. What's the best way to go about doing this? The connection to the server localhost:8080 was refused | kubernetes BUT : UDP port 53 can be reach everywhere. 593), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned. Changing the port range is risky because of port conflicts, so it is not a good idea. I am thinking OP probably want to ask how we can forward request from port 80 or 443 to Node Port such as 30000. kubernetes - Why does kubectl port-forward require the destination user haproxy Why can I write "Please open window" without an article? How do you manage the impact of deep immersion in RPGs on players' real-life? 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. Connect and share knowledge within a single location that is structured and easy to search. Airline refuses to issue proper receipt. Host network - Force the pod to use the hosts network instead of a dedicated network namespace. Can we also add a Route here to connect a domain? Then you will be able to set the load balancers to forward your 443/80 requests to your cluster node's 30443/30080 ports that are handled by your cluster's ingress controller. The connection to the server <host>:6443 was refused - Discuss Kubernetes How to reproduce it (as minimally and precisely as possible): By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. And you can still use kube-dns with hostNetwork, see https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-dns-policy. : It is maybe the version used in the CNI that can be involved in such bugs. Both human users and Kubernetes service accounts can be authorized for API access. What you expected to happen: Send feedback to sig-contributor-experience at kubernetes/community. is not a kubernetes issue, is networking configuration issue, the installers should configure the route to the service network that is a kubeadm decision , cc @neolit123. 192.168.0.233/24 dev ens161 Ingress - AFAIK it uses NodePort (So we face with the first problem again) or a cloud provider LoadBalancer. Connect and share knowledge within a single location that is structured and easy to search. kubectl get: The connection to the server localhost:8080 was refused I am running a dotnet core app using Kubernetes with Docker. Physical interpretation of the inner product between two quantum states. https://kubernetes.github.io/ingress-nginx/deploy/baremetal/, "Empty reply from server" when using Ingress, https://ranchermanager.docs.rancher.com/v2.7/how-to-guides/new-user-guides/kubernetes-resources-setup/load-balancer-and-ingress-controller/ingress-configuration. We read every piece of feedback, and take your input very seriously. What information can you get with only a private IP address? Some systems may not have a default gateway but only explicit routes. However, Kubernetes itself will not use port 8080 but some services could. And still. :), Sorry for the delay time . 2. Which version of Kubernetes do you use in your cluster? What you did (hostNetwork: true) means you can only have one pod of the ingress controller per node. Is this a BUG REPORT or FEATURE REQUEST? 80 and 443) is not accessible, but anyway the automatically assigned node port. worked fine for me. In your case, it seems to be expecting IPv6 traffic instead. May I reveal my identity as an author during peer review? Each Node with 3 network card : one wiht default route and used for bootstrapping cluster, one used for haproxy and the last for keepalived. The text was updated successfully, but these errors were encountered: @dnoland1 did you try the node-ip parameter in kubelet? Default keepalived configuration on master node: `! We read every piece of feedback, and take your input very seriously. Use netstat to find no process listening on port 80. This question appears to be off-topic because it is not about programming or development. What is the "gateway" found in `docker inspect`? option httplog To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Can a simply connected manifold satisfy ? Cartoon in which the protagonist used a portal in a theater to travel to other worlds, where he captured monsters. It only listen on port 6443, but not localhost:8080. and this causes the following command fails when it is run on the master node: kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Per app, you just need a DNS record mapping your hostname to your cluster's nodes, and a corresponding ingress. I have a service running on kubernetes exposed via nodeport like so: That service is reachable from other nodes and is working properly; however, I don't see see that kubernetes listening on that port if I do a netstat -tunlp | grep 30005. Connection Refused between Kubernetes pods in the same cluster valid_lft forever preferred_lft forever, 3: ens192: mtu 1500 qdisc mq state UP group default qlen 1000 } inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 Mark the issue as fresh with /remove-lifecycle rotten. About the ping, the behavior is right: this is because while iptables mode adds a NAT rule for a specific serviceip:port, in IPVS mode to work proper kube-proxy adds the service IP to a network interface (kube-ipvs0, usually). You switched accounts on another tab or window. 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. Conclusions from title-drafting and question-content assistance experiments Configure portainer with Minikube's docker. Have a question about this project? Rotten issues close after 30d of inactivity. rev2023.7.24.43543. Best estimator of the mean of a normal distribution based only on box-plot statistics. VIP address (192.168.0.233) will be used as entrypoint for kubeadm init during bootstrap, kubeadm init --control-plane-endpoint "192.168.0.233:443" --pod-network-cidr "10.100.0.0/16" --service-cidr "10.32.0.0/12" --upload-certs --v=5. Since we use Kubernetes on premise we cannot use this option. What are the pitfalls of indirect implicit casting? From my perspective/experience leveraging explicit service cidr routes is a viable solution. Running a baremetal master. kubernetes - The connection to the server localhost:8080 was refused default_backend kube-apiserver, backend kube-apiserver You can choose one which is suitable for your environment. Use the following command to access an NGINX deployment within your cluster. Facing connection issue to localhost:8080 while - Discuss Kubernetes Below the result of some of the last commands that I executed on my local machine using the locally installed gcloud client: Accessing Jenkins through your local machine: You can run all kubectl commands within your local machine, but if you run kubectl port-forwarding in your local machine you will have to access the Jenkins page through this address http://localhost:8080/. priority 200 Making statements based on opinion; back them up with references or personal experience. maxconn 4000 How do you manage the impact of deep immersion in RPGs on players' real-life? mode tcp I tried to install in ubuntu18.04 and it was normal. However without default gateway, there is no route to service ip of kube-apiserver and pods will fail to access API of kubernetes. Please check https://kubernetes.github.io/ingress-nginx/deploy/baremetal/, If that's empty I assume you are trying to use the ingress controller in bare-metal (or docker in docker) I know some ways to expose services in Kubernetes: You can configure various ways to access the grouping. I then came across the aforementioned article and decided to try the following: This solved my problem and now my app is accessible through the Kubernetes endpoint. I remove the taint on each node in or order to be able to schedule pods on all nodes, When i deploy Kubernetes dashboard with NodePort Service to expose, it appears that the NodePort can only be reached with IP from Node where pod is running. Environment: Kubernetes version (use kubectl version): 1.20.5; calico.txt Reason not to use aluminium wires, other than higher resitance. Sign in 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. Using Kubernetes Ingress We will explain all three methods. One thing you should probably want to do is a tcpdump (both putting kube-proxy in ipvs and iptables mode) and checking if the package leaves, and returns with a different IP/port tuple. May I reveal my identity as an author during peer review? What's the DC of a Devourer's "trap essence" attack? chk_haproxy when I run tcpdump on all interface and try to reach Node port exposed i cannot see any trafic. You either need to set up your own dedicated load balancer pair (e.g. Check your .kube or config in the home directory file. I don't use this approach in a production environment, I just use it locally for testing. Accessing Jenkins through Google Cloud Console: In the Google Cloud Console, on the top right menu just click on the following icon >_ (Activate Cloud Shell) then run the port-forwarding command: Now if you click on the icon Web preview -> Preview on port 8080 you should see the login page. weight 2 2: ens161: mtu 1500 qdisc mq state UP group default qlen 1000 What does "Now listening on: http://[::]:80" mean? we did not set this "hostNetwork: true" before, ingress is still ok, and run for several month, recently only after doing something, like restart docker service, ingress-nginx did not work. Not the answer you're looking for? (sorry if you wrote that, maybe I've missed). Why is this Etruscan letter sometimes transliterated as "ch"? Connect and share knowledge within a single location that is structured and easy to search. }`. 592), How the Python team is adapting the language for an AI future (Ep. Docker: Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432? Conclusions from title-drafting and question-content assistance experiments NodePort service is not externally accessible via `port` number, Kubernetes node port can't expose successfully, kubernetes: cannot access NodePort from other machines, Can't access service in my local kubernetes cluster using NodePort, cannot access a service via nodeport in kubernetes for docker desktop windows, There is no listening port on slave-node host when exposing service via kubectl, Kubernetes Service NodePort not connected, NodePort service is not exposed outside kubernetes cluster. Why do capacitors have less energy density than batteries? Default Configuration on 2nd backup node : vrrp_instance VI_1 { Mark the issue as fresh with /remove-lifecycle stale. Well occasionally send you account related emails. I hope it remains a viable solution in the absence of default gateway. Making statements based on opinion; back them up with references or personal experience. valid_lft forever preferred_lft forever`, I tried to figure out what is missing or if there is a typo in my configuration with this step by steph troubleshooting : The container listens at port 4000 which is specified as. Method-1: Listen on port 8080 locally, forwarding to port 80 in the pod Method-2: Listen on port 8080 on all addresses, forwarding to 80 in the pod Method-3: Listen on a random port locally, forwarding to 80 in the pod Perform port-forwarding on Kubernetes Deployment Pods Summary References Advertisement The error message "cp: /etc/kubernetes/admin.conf: No such file or directory" suggests that there is no admin configuration file present in the directory /etc/kubernetes/. using the following command Jenkins on 80 Using IP table Forwarding Rule This is the easiest way to access Jenkins on port 80. Conclusions from title-drafting and question-content assistance experiments Google Cloud Jenkins gcloud push access denied, Kubernetes: Unable to connect to the server, Unable to create cluster using jenkins in aws (kube-aws), Insufficient Oauth scope when trying to deploy Jenkins click to deploy on an existing Google Kubernetes Engine cluster, Jenkins app is not accessible outside Kubernetes cluster, Can't connect to Jenkins after successfully installing the Helm chart on the Google Cloud Platform, Jenkins pod unable to create deployments in Private Kubernetes cluster, How to connect Jenkins with Google Cloud Shell particularly for GKE, ERROR: Connection was broken: java.nio.channels.ClosedChannelException when using Jenkins in Kubernetes. valid_lft forever preferred_lft forever, 5: docker0: mtu 1500 qdisc noqueue state DOWN group default METALLB can be installed on bare metal to solve this problem. Thanks for contributing an answer to Stack Overflow! kubectl port-forward: "pod does not exist" at the first time running? But the solution i suggested seems valid? Kubernetes nodeport not visible as listening on host but service Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plane hosts. does not allow access to Pods not listening on port 80 does not allow access from Pods not in namespace internal. Assign External IP to a Kubernetes Service, flask application running on Kubernete Pods doesn't respect port in configuration, Host and Port to access the Kubernetes api, Python Flask-Restful application with Kubernetes - Connection refused, Not able to access my Flask server through ingress. 5000 might be a much better idea since that's the default port for dev. Asking for help, clarification, or responding to other answers. What is the smallest audience for a communication that has been deemed capable of defamation? (Bathroom Shower Ceiling), German opening (lower) quotation mark in plain TeX. You can find more info about it here. kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.0.4/deploy/static/provider/baremetal/deploy.yaml. What is the audible level for digital audio dB units? Install tools: kubeadm Network plugin and version (if this is a network-related bug): CNI: calico 1.15 Others: Run crictl info and check RuntimeReady is true Add --cgroup-driver=systemd to the kubelet start command (For example, in /etc/systemd/system/kubelet.service.d/10-kubeadm.conf) You can find more info about it here. Difference in meaning between "the last 7 days" and the preceding 7 days in the following sentence in the figure". I'll take a look during this week on this. error: couldn't get available api versions from server: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connectex: No connection could be made because the target machine actively refused it. Issue: Kubeadm init blocks at "This might take a minute or longer if the control plane images have to be pulled opened by PhoenixAD on 2018-01-31 closed by timothysc on 2018-06-12 kube-apiserver service is started. Have you tried switching kube-proxy to ipvs and see what happens. Powered by Discourse, best viewed with JavaScript enabled, Facing connection issue to localhost:8080 while using the CMD kubectl version, Verify that the Kubernetes control plane components (, Verify that the Kubernetes API server is listening on the correct IP address and port by running the command, Verify that the kubeadm was installed properly, by running, If kubeadm was not installed, you should install it, if its installed, try running. Kubernetes to work properly regardless of whether the default gateway is set or not. Not the answer you're looking for? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, Right now I see all answersa are related to creating a service directly to pod port. How can I animate a list of vectors, which have entries either 1 or 0? 2: ens161: mtu 1500 qdisc mq state UP group default qlen 1000 Accessing Kubernetes service on port 80 - Stack Overflow When the k8s kubelet starts, I see the error: in /var/log/syslog and the API server is not listening on the service cluster network, which causes failures in other pods. I also tried in ipvs mode and the results is still the same as with iptables mode. In line with what @johnharris85 and @Yuankun said about the IP Address needing to be set to 'any' rather than on the localhost, I found this article: http://blog.scottlogic.com/2016/09/05/hosting-netcore-on-linux-with-docker.html. Find centralized, trusted content and collaborate around the technologies you use most. This is still an issue. link/ether 00:0c:29:86:00:43 brd ff:ff:ff:ff:ff:ff To learn more, see our tips on writing great answers. To see all available qualifiers, see our documentation. Is this mold/mildew? In the dotnet core app, I have Kestrel server listening on port 8080 by setting the following in Program.cs: I have tested the app build locally and the endpoint works as expected on localhost:8080/api/test. Nearly 100% of traffic to our clusters comes in on 80 or 443 and is routed to the right service by ingress rules. Does the US have a duty to negotiate the release of detained US citizens in the DPRK? Not the answer you're looking for? Is it a concern? 3rd network card with same MAC on all nodes (manual MAC on vmware VM configuration), enable rp_filter to allow asymetric routing, cat /etc/sysctl.d/k8s.conf net.ipv4.conf.all.rp_filter = 2. balance roundrobin Yes, that parameter is already being set. Have created an dotnet core application and when run the command: everything goes well but I don't understand what does the below line mean: Why is that I'm not seeing the IP address? I have been facing 504 Gateway Timeout and 502 Bad Gateway errors on my services (Apache Spark History Server and another standalone service for Spark). You switched accounts on another tab or window. What is the smallest audience for a communication that has been deemed capable of defamation? (choose one): FEATURE REQUEST. 593), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned. I understand this to mean that the container gets built with an exposed 8080 port. Changing the port range is risky because of port conflicts, so it is not a good idea. means: your application is telling you that it is listening on TCP port 80 on all IPv6 addresses it owns. Why can I write "Please open window" without an article? Difference in meaning between "the last 7 days" and the preceding 7 days in the following sentence in the figure". If you are running the Kubernetes cluster on the Apple M1 chip, its possible that your version of kubeadm is not compatible with the chip architecture, Try checking the Kubernetes documentation for any known issues or troubleshoot guides related to running on M1.