docker swarm network issues

I need to play the video on several machines on the network, does anyone have any solutions? whereas docker 20.10.x returns ALTERNATIVELY ip1 and ip2 (round-robin). The symptom is that the overlay network doesn't work. 64 bytes from my-web.1.1aj142fcfz7ltg0h23pc8om42.nginx-services (10.202.0.10): icmp_seq=2 ttl=64 time=0.418 ms @dejeroWilliamScott experience is similar to ours. that would be appreciated. 22 * * * I'm experiencing this issue as well, pretty much similar to all of the errors/specifications above, running Ubuntu 20.04 LTS and to say the least it cripples my workflow . 29 * * * Expiry Duration: 3 months Everything worked as expected. any news here? Feb 24 04:07:29 p1 dockerd[10001]: time="2022-02-24T04:07:29.470598391Z" level=error msg="reexec to set bridge default vlan failed exit status 1" 64 bytes from my-web.1.1aj142fcfz7ltg0h23pc8om42.nginx-services (10.202.0.10): icmp_seq=1 ttl=64 time=0.606 ms We have many VMs in Swarm/Clusters that are on v19 and we are on hold for updates to v20 until this is resolved. From inside of a Docker container, how do I connect to the localhost of the machine? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. It's not. Feb 24 04:07:50 p1 dockerd[10001]: time="2022-02-24T04:07:50.137140295Z" level=error msg="fatal task error" error="task: non-zero exit (139)" module=node/agent/taskmanager, This is the same issue described on github. Step 6 : Performing inspect on vote service shows us the VIPs which are used to access the service. Yeah sounds like you don't have an overlay network that is attached to your containers that are in your swarm. `, `root@d8766a2befac:/# ping my-web.1.1aj142fcfz7ltg0h23pc8om42 -c 3 rtt min/avg/max/mdev = 0.418/0.443/0.469/0.032 ms Without much proves, I'm inclined to say that there's an incompatibility with the built-in encryption on overlay networks and their recreation after docker or kernel upgrades. (How) Can I switch from field X to field Y after getting my PhD? We added it to /etc/network/interfaces pre-up to fix this. Root Rotation In Progress: false iptables are showing the MARK which its sets on any traffic hitting IP address 10.0.0.4 (remember this is one of the VIP assigned to vote service from myoverlay1 network) in this case its setting HEX value of 0x103. Step 4 : Lets check the containers which are running on manager node. Storage Driver: overlay2 Swarm: active Feb 24 04:07:29 p1 dockerd[10001]: time="2022-02-24T04:07:29Z" level=error msg="enabling default vlan on bridge br0 failed open /sys/class/net/br0/bridge/default_pvid: permission denied" For me it worked until "Docker version 20.10.4, build d3cb89e", Encountering this same issue, with the caveat that the tx-checksum-ip-generich off fix doesn't seem to work for me, I'm still struggling with this issue with Debian Bullseye running on GCP. But impossible when going through localhost, at the oposite it works if targeting a remote node. I've created a new issue (#43443) to prevent confounding the two potentially different issues here. Backing Filesystem: xfs Looks like this issue actual for CentOS 8 as well. Sign in Two containers (one client and one vote) are running on manager1 node and one container (vote) is running on worker1 node. Step 2 : Following commands are used for starting the vote and client service. We can see the tcpdump traffic while performing curl on vote application. Announcing Design Accessibility Updates on SO. Before you deploy the stack to the swarm, create a Docker Network with the overlay driver (note that network names must be unique): This will create an overlay network that spans the entire swarm. Containers have connectivity with other containers on the same overlay network, however connection to the swarm on published ports (such as Traefik public ports), do not connect. So that's why docker service ls will give me an error.I'm just trying to figure out how the networking should work. This article is based on the awesome work done by Sreenivas (https://sreeninet.wordpress.com/2017/11/02/docker-networking-tip-troubleshooting/). Feb 24 04:07:52 p1 dockerd[10001]: time="2022-02-24T04:07:52.017525461Z" level=warning msg="rmServiceBinding handleEpTableEvent huginn_web 25221c5d06c8e5af7a8525e73f36957d4f4fadb31a3b6a9a6afc1ae3847b3bdb aborted c.serviceBindings[skey] !ok" Following my comment above we recreated the ingress overlay network without the encrypted option (only the default options). Did anything change regarding the default networks used for bip, gw or ingress? Latest version of docker-ce. But with the new kernel something changed and therefore the recognition of MTU fails. While you have containers that are running as a service in your swarm please run the following and we can troubleshoot from there. Feb 24 04:07:45 p1 dockerd[10001]: time="2022-02-24T04:07:45.506170587Z" level=info msg="ignoring event" container=f3a9592298684ed2915e91fbfe3e6927fa8c18ffff79be748c19d159e63fa69c module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete" This is pretty major for us running enterprise solutions. How is Docker different from a virtual machine? Feb 24 04:07:45 p1 dockerd[10001]: time="2022-02-24T04:07:45.506170587Z" level=info msg="ignoring event" container=f3a9592298684ed2915e91fbfe3e6927fa8c18ffff79be748c19d159e63fa69c module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete" After some experimentation it turns out that it seems to be a new kernel (or Debian) problem, but not necessarily Docker Swarm itself. I've been trying this many times now. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 3 packets transmitted, 3 received, 0% packet loss, time 50ms problem with Docker version 20.10.12, build e91ed57 on: no problem with Docker version 20.10.12, build e91ed57 on. Interested to know if this is getting any attention. I'm trying to reach a service on port 2002 exposed through an overlay network on my swarm cluster. I've spotted that docker starts using firewalld to add interfaces docker0 and docker_gwbridge to "docker" zone. The services running in the containers are not accessible using the swarm mode routing mesh but only using the explicit host ip, After some investigation, we found that the problem is related to the 4789 udp packets that docker uses to manage the requests in the swarm: these packets are dropped by the source node and they never reach the destinatation node. Heartbeat Period: 5 seconds 17 * * * I don't believe it's a firewall problem. 16 * * * I made multiple tests installing old versions of containerd.io, docker-ce 19.03 and matching versions from ~august 2020, but still the same. If its accessed using host machine then ingress routing mesh network is used to provide the access. there is error in logs, Describe the results you expected: Feb 24 04:07:51 p1 dockerd[10001]: time="2022-02-24T04:07:51.765275512Z" level=warning msg="Error (Unable to complete atomic operation, key modified) deleting object [endpoint q1jpb5oeysmfn3k6uoq4p3maz 7848fd2496431f838fac9506f0f3f8e686a1fcdf7a54fbd6936b6b3c62ea0715], retrying." How to copy files from host to Docker container? So, since docker 20.10 is now returning a different ip after each DNS request when services have several ips, I was endlessly losing connection After realizing this, I had to modify the code of my services to take into account this new behavior. root@d8766a2befac:/# curl http://my-web.1.1aj142fcfz7ltg0h23pc8om42:8080/ --max-time 15 Which book should I choose to get into the Lisp World? This seems to be reboot-safe 14 * * * 19 * * * Registry: https://index.docker.io/v1/ Dispatcher: 7 * * * We have many VMs in Swarm/Clusters that are on v19 and we are on hold for updates to v20 until this is resolved. Ok, after re-reading the issue,we don't experience the same issue. What is the gravitational force acting on a massless body? I don't know if what I'm describing here could be related to this issue. I had automatic updates enabled on my manager nodes, and out of nowhere they started consistently failing overnight last week. 12 * * * The way to test this is with tcpdump: When it's broken you only see packets going out, but no packets coming in. 1 * * * Context: default On our installations we've added docker_gwbridge in "trusted" zone. 192.168.37.201:2377 To learn more, see our tips on writing great answers. I thought that putting it in bridge mode would solve it, but I saw that you can't put the Docker Swarm in bridge mode. 11 * * * We can use the following commands to verify that on which node services are started. buildx: Build with BuildKit (Docker Inc., v0.5.1-docker), Server: Again make a note of the virtual IPs present on loopback interface. I can run docker containers fine. These are the same IPs which are assigned on lo interface of vote application. In the example below, my nginx has one hostname (server1) but at least 2 ips (ip1 in network net1 and ip2 in network net2). You signed in with another tab or window. For reference, these versions worked everywhere for us (prior to upgrading). containerd version: 269548fa27e0089a8b8278fc4fc781d7f65a939b Connect and share knowledge within a single location that is structured and easy to search. I am facing the same on centos 7 and centos 8. could you (all affected) perhaps provide some debugging to investigate whether we all actually facing the same problem? Well occasionally send you account related emails. Then try setting the network options like this: It might also help you to look at how Traefik manages its network in a docker swarm and try to replicate it, since all containers in a swarm can connect to Traefik, and that seems like the use case you are trying to solve. Our issue was resolved by a different solution than those presented in this thread, so I'm posting it here for completeness/awareness. How to get a Docker container's IP address from the host, Docker: Copying files from Docker container to host. Do the debris from the re-entry of Long March core stage ever reach the surface? we have two installations with this issue which happened after upgrade to 20.10 Run the following from your manager node: Also let me know what the network is your docker swarm nodes are running on. Question may arise why we have two VIPs assigned for vote service, vote service can be accessed using two methods, either from client or from the host machine. It only occurs with services attached via overlay. I have tried disabling kernel updates, and will post my findings. Is the US allowed to execute a airstrike on Afghan soil after withdrawal? Cgroup Version: 1 containers could ping containers on other nodes, but other traffic would hang indefinitely (e.g. rtt min/avg/max/mdev = 0.365/0.467/0.606/0.103 ms similar problem flannel-io/flannel#1279. runc version: ff819c7e9184c13b7c2607fe6c30ae19403a7aff You need to have some containers running to trigger overlay traffic. curl: (28) Connection timed out after 15001 milliseconds issue happens only occasionally): OK, I've resolved the issue, but not sure what was the root cause. Volume: local 21 * * * The tx-checksum-ip-generic off trick DOES work, but I do not want to use it as it's not normal to have to use it. But impossible when going through localhost, at the oposite it works if targeting a remote node. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Raft: By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Press question mark to learn the rest of the keyboard shortcuts. Snapshot Interval: 10000 We RCA'd our issue to an Ubuntu Kernel update, specifically; Downgrading the Kernel to 5.4.0-1072 (shown removing the 1073 version) restored cross-node container connectivity. 3 * * * They have no outside connections.Can't ping. root@d8766a2befac:/# curl http://my-web.1.1aj142fcfz7ltg0h23pc8om42:8080/ --max-time 15 ID: NYJ3:D3X4:LGZE:SPN3:XLAK:TWUY:OYRB:U27K:GEAR:FAYH:2O4P:756L ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17813 Interested to know if this is getting any attention. Kernel Version: 4.18.0-240.10.1.el8_3.x86_64 The strange thing is we had two essentially identical environments, one has the issue, the other works fine. We've found reference to a VMWare PR 2766401 which refers to a bug causing the vmxnet driver to drop packets. Edit/ps: it may be reboot-safe, but after recent dnf update the setting was lost again. I have the same problem on a fresh CentOS8.3 install (also Stream, from netinstall), after swarm init (3 managers, no workers), creating a test service, curl always fails on every node except the node where the replica is actually running, disabled selinux (permissive) and firewalld to eliminate as reason Orchestration: Now, here comes the interesting part: docker 19.03.x and docker 20.10.x behave differently when it comes to resolve the ip of the host server1. tcpdump was showing incorrect checksums but also MTU failures (need to fragment). Is Pelosi's trip to Taiwan an "official" or "unofficial" visit? unfortunately I have no bare metal available to install 3 systems from a naked ISO (newest centos 8 stream at best). I have been trying to reproduce (in other machine in the same network) the video played by this container on the docker-compose via swarm. Strangely enough the Docker Swarm overlay network does work on older kernels, despite transferring data over a VLAN with smaller 1400 MTU. I've attached a simplified stack.yaml file for reference. I'm not real good with debugging iptables so I am still limping through this. Election Tick: 10 Our containers start but they randomly fail see each other (unexpected EOF, connection closed) even if they are in the same network (driver: overlay). Labels: 10 * * * Tested with Docker 20.10 and 19.03. interestingly this does not happen with the vagrant image boxomatic/centos-8-stream although all versions I can overview are the same after full system upgrade. Containers of services can't start Default Runtime: runc 468), Monitoring data quality with Bigeye(Ep. I'm clueless, debugging swarm ingress networking isn't very straight forward for me, unfortunately. We also recreated all networks that were using the encrypted option. There's although one thing that should be considered. What is a wind chill formula that will work from -10 C to +50 C and uses wind speed in km/h? I have used overlay1 network to start the services which I have created in previous step. Cgroup Driver: cgroupfs Same issue Centos7, after upgrade 19.03.14 to 20.10.3. 18 * * * rev2022.8.2.42721. WARNING: No blkio weight_device support Plugins: PING my-web.1.1aj142fcfz7ltg0h23pc8om42 (10.202.0.10) 56(84) bytes of data. curl, mysql, etc.). Btw, just for further reference, since this is a multi-cloud instance without VPC, we had to encrypt the --data-path-addr by using the good vpncloud interface instead of the built-in encryption. So it seems like the bridge driver is not working. This doesn't work:docker run --rm -it alpine ping -c 1 8.8.8.8, This works:docker run --rm -it --network=host alpine ping -c 1 8.8.8.8. - is or was? containers are running, Additional information you deem important (e.g. Just added a new server to my Docker Swarm and suddenly had issues with the unencrypted overlay network, which runs over a VLAN with 1400 MTU without any special settings. For example, mine is a, Let me know your results and we can work from there. my-web.1.1aj142fcfz7ltg0h23pc8om42. Init Binary: docker-init Neither downgrading the kernel, changing VMWare NIC nor setting tx-checksum-ip-generic off sound like a solution. Calculating length of curve based on data points? I think its plausible! After all configured we started the upgrade of kernel on each node one by one. So it basically means that my service have several ips (one for each of its network). Can someone from Docker team update on latest status on this issue? We also have connectivity problems in our docker swarm (3 redhat 8.3 vm nodes) cheers @txtdevelop ! [Docker](http://www.docker.io) is an open-source project to easily create lightweight, portable, self-sufficient containers from any application. ;; WHEN: Wed Feb 24 17:25:37 UTC 2021 Also, I use service names as alias like in your case. Services lose connectivity between each other in swarm mode. Debug Mode: false Converting hex value of 0x103 to decimal gives 259. I use swarm and I had network connectivity issues right after migrating to docker 20.10.x. init version: de40ad0 Network: bridge host ipvlan macvlan null overlay Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, San Francisco? We initially thought the connectivity loss was related to a Docker Swarm upgrade (specifically to 20.10). Two VIPs are present 10.255.0.4/32 and 10.0.0.4/32 on lo interface, one is from ingress network and other one from overlay network. I began to think it's a networking issue on my side, but other VMs on the same hypervisors do not have that problem. This is apparently fixed from VM version 15. 64 bytes from my-web.1.1aj142fcfz7ltg0h23pc8om42.nginx-services (10.202.0.10): icmp_seq=3 ttl=64 time=0.365 ms, --- my-web.1.1aj142fcfz7ltg0h23pc8om42 ping statistics --- curl: (28) Connection timed out after 15001 milliseconds Images: 1 Debug Mode: false When its accessed from the client then myoverlay network is used to access the service. But as soon as I try to run the same containers as a service in swarm mode. Have a question about this project? have no custom daemon.json applied. 4 * * * Same for me, in my case on top of this I am using XCP-NG. Default Address Pool: 10.0.0.0/8 Disabling "tx-checksum-ip-generic" on the network interface solves the issue. ^C Server Version: 20.10.3 Is there an update on this issue? Data Path Port: 4789 Architecture: x86_64 on all swarm hosts. Feb 24 04:07:52 p1 dockerd[10001]: time="2022-02-24T04:07:52.025887427Z" level=info msg="initialized VXLAN UDP port to 4789 " https://www.reddit.com/r/docker/comments/ua1jxz/encrypted_overlay_network_not_work/, I am having this issue, as well running Photon OS. same setup works perfectly fine in gcp and aws (same os, same components terraformed by same script). 600 IN A 10.202.0.10, ;; Query time: 0 msec Most DPR (Damage Per Round) Barbarian Build against Undead, External hard drive not working after unplugging while Windows Explorer wasn't responding. Two backend IP addresses present corresponds to each vote container IP. Given the date of the issue - what is the "official" fix? 8 * * * Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runc Seems to be a problem only with VMWARE virtual NIC when used with VMXNET3 driver. OSType: linux So our hypothesis is that if you running VM version 14 with the Debian 5.10.92-2 kernel it breaks, but running an older kernel version (in our case 4.19.98-1+deb10u1) or an older VM version, it works fine. Force Rotate: 0 5 * * * root@d8766a2befac:/# `. How to copy Docker images from one host to another without using a repository. re-initing swarm didn't help. Paused: 0 I had issues with short requests working and long ones failing before, and of course it was an issue related to MTU size. Overlay networking and everything works fine but inbound routing mesh. Development container with Visual Studio code - how does Mapping multiple docker networks to interface names Press J to jump to the feed. 469). Step 1 : Create overlay network which will be used to start the vote and client application. 20 * * * MTU of the internal veth was set to 1450, after I reconfigured the stack to: I would definitely prefer not to have to configure this, this issue is blocking our update of all systems to Debian 11 and I'm not sure I want to proceed just with this work around. After upgrading to Linux Kernel to 5.4.0-105-generic on Ubuntu 20.04, the same thing happened to us in one node. Security Options: EDIT: will try to recreate the ingress network with default options. In our case the ingress overlay network was created with encrypted option enabled. Making statements based on opinion; back them up with references or personal experience. Plugins: Why does the United States openly acknowledge targeted assassinations? Note : we havent used the IPaddress to access the containers as swarm automatically provides the DNS discovery. However, we later determined that it wasn't the Docker upgrade at all -- it was the reboot that we performed while doing it (which loaded the new Kernel on our test environments). Thanks for contributing an answer to Stack Overflow! 28 * * * What is the equivalent of the Run dialogue box in Windows for adding a printer? Managers: 1 These are the package versions we're using, but it's probably not that since one environment has this and it works.

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