# Swarm **URL:** https://forums.docker.com/c/docker-engine/swarm/17.md [Latest](https://forums.docker.com/latest.md) · [Categories](https://forums.docker.com/categories.md) · [Tags](https://forums.docker.com/tags.md) --- ## [About the Swarm category](https://forums.docker.com/t/about-the-swarm-category/2390)
**Author:** [@rufus](https://forums.docker.com/u/rufus)\ **Replies:** 0
Docker Swarm is native clustering for Docker. It allows you create and access to a pool of Docker hosts using the full suite of Docker tools. Because Docker Swarm serves the standard Docker API, any tool that already com… --- ## [How to run etcd cluster as service with docker swarm mode?](https://forums.docker.com/t/how-to-run-etcd-cluster-as-service-with-docker-swarm-mode/152440)
**Author:** [@papiris](https://forums.docker.com/u/papiris)\ **Replies:** 5\ **Last updated:** [October 4, 2026, 9:04pm UTC](https://forums.docker.com/t/how-to-run-etcd-cluster-as-service-with-docker-swarm-mode/152440 "2026-10-04T21:04:02Z")
Hello, This is my first time posting here. I recently began experimenting with docker swarm as a migration path away from kubernetes, and am trying to achieve some of the same high-availability for apps and databases w… --- ## [Slow responses from a web app in swarm cluster](https://forums.docker.com/t/slow-responses-from-a-web-app-in-swarm-cluster/38532)
**Author:** [@givanovhub](https://forums.docker.com/u/givanovhub)\ **Replies:** 8\ **Last updated:** [July 20, 2026, 2:06pm UTC](https://forums.docker.com/t/slow-responses-from-a-web-app-in-swarm-cluster/38532 "2026-07-20T14:06:05Z")
Hello, I have some kind of a problem with my docker set-up. Here is the case: I have a web-app (java spring-boot). The app servers JSON I also have angular app which calls this API. The problem i see, is that the re… --- ## [OAuth2-Domain (Host-IP) not reachable for Docker-Container inside swarm ](https://forums.docker.com/t/oauth2-domain-host-ip-not-reachable-for-docker-container-inside-swarm/151798)
**Author:** [@immediatemeditate1910](https://forums.docker.com/u/immediatemeditate1910)\ **Replies:** 2\ **Last updated:** [June 3, 2026, 8:02pm UTC](https://forums.docker.com/t/oauth2-domain-host-ip-not-reachable-for-docker-container-inside-swarm/151798 "2026-06-03T20:02:45Z")
Hello, I run a small Docker Swarm setup with Traefik and Authelia for authentication, along with several services such as Immich, HedgeDoc, and others. I am currently trying to integrate OAuth2 properly with HedgeDoc. … --- ## [Error creating vxlan interface: file exists](https://forums.docker.com/t/error-creating-vxlan-interface-file-exists/151288)
**Author:** [@romgo](https://forums.docker.com/u/romgo)\ **Replies:** 1\ **Last updated:** [March 10, 2026, 6:51pm UTC](https://forums.docker.com/t/error-creating-vxlan-interface-file-exists/151288 "2026-03-10T18:51:10Z")
Hello, I upgraded a standalone docker swarm node, from 28.3.0 to 28.5.2 and some swarm service wasn’t able to restart with the following error : The error “network sandbox join failed: subnet sandbox join failed f… --- ## [NFS share not mounting as volume, but fine manually](https://forums.docker.com/t/nfs-share-not-mounting-as-volume-but-fine-manually/151243)
**Author:** [@pludikovsky](https://forums.docker.com/u/pludikovsky)\ **Replies:** 4\ **Last updated:** [March 4, 2026, 6:29pm UTC](https://forums.docker.com/t/nfs-share-not-mounting-as-volume-but-fine-manually/151243 "2026-03-04T18:29:40Z")
Facts: Docker Engine 29.1.3 running on Alpine x86\_64 NFS share available via OpenMediaVault Docker Swarm with 3 nodes (1 Master, 2 workers) All nodes are dual-stack with static IPs All Hostnames are resolvable, all rev… --- ## [Docker Swarm Ingress network is not forwarding packets to the containers](https://forums.docker.com/t/docker-swarm-ingress-network-is-not-forwarding-packets-to-the-containers/150908)
**Author:** [@jcake](https://forums.docker.com/u/jcake)\ **Replies:** 2\ **Last updated:** [January 22, 2026, 5:32pm UTC](https://forums.docker.com/t/docker-swarm-ingress-network-is-not-forwarding-packets-to-the-containers/150908 "2026-01-22T17:32:26Z")
Hello. There have been a number of posts relating to Docker Swarm mode “not working”. Unfortunately, none of these have worked for me. Scenario: Two Proxmox hosts: p1 and c2 run one privileged LXC each - architect on p… --- ## [New Prometheus exporter for Docker Swarm scheduler visibility. Looking for feedback](https://forums.docker.com/t/new-prometheus-exporter-for-docker-swarm-scheduler-visibility-looking-for-feedback/150673)
**Author:** [@leinardi](https://forums.docker.com/u/leinardi)\ **Replies:** 3\ **Last updated:** [December 23, 2025, 8:36am UTC](https://forums.docker.com/t/new-prometheus-exporter-for-docker-swarm-scheduler-visibility-looking-for-feedback/150673 "2025-12-23T08:36:02Z")
Hi everyone, I run Docker Swarm in my homelab as a single-node Swarm. While monitoring it, I realized I was missing clear visibility into what the Swarm scheduler is actually doing. Especially around task states and g… --- ## [Questionable design](https://forums.docker.com/t/questionable-design/150648)
**Author:** [@rony539](https://forums.docker.com/u/rony539)\ **Replies:** 4\ **Last updated:** [December 17, 2025, 3:39pm UTC](https://forums.docker.com/t/questionable-design/150648 "2025-12-17T15:39:54Z")
Why are configs and secrets static? Is it hard to do with current architecture? Is it a design choice? I see no good reason for not having dynamic secrets and configs. Am I just missing something? --- ## [Docker service gaining access to main / host network](https://forums.docker.com/t/docker-service-gaining-access-to-main-host-network/150549)
**Author:** [@tessierp](https://forums.docker.com/u/tessierp)\ **Replies:** 10\ **Last updated:** [December 1, 2025, 8:53pm UTC](https://forums.docker.com/t/docker-service-gaining-access-to-main-host-network/150549 "2025-12-01T20:53:05Z")
Hi, I have a docker swarm and trying to setup a docker service that, instead of being configured like most of my services with the overlay driver, I would like this particular service to be able to scan my main network.… --- ## [Subpath with NFS volumes](https://forums.docker.com/t/subpath-with-nfs-volumes/145292)
**Author:** [@leonardostumpf](https://forums.docker.com/u/leonardostumpf)\ **Replies:** 16\ **Last updated:** [November 23, 2025, 4:44pm UTC](https://forums.docker.com/t/subpath-with-nfs-volumes/145292 "2025-11-23T16:44:14Z")
Hello! I’m using Docker Swarm in a homelab and I’m trying to figure out how to proper use the long syntax to mount NFS volumes, as described in Services top-level elements | Docker Docs What I’m observing is the docker… --- ## [Running multi-GPU workload (vLLM) with Docker Swarm - IPC limitation?](https://forums.docker.com/t/running-multi-gpu-workload-vllm-with-docker-swarm-ipc-limitation/150373)
**Author:** [@ziywang50](https://forums.docker.com/u/ziywang50)\ **Replies:** 1\ **Last updated:** [November 10, 2025, 7:12am UTC](https://forums.docker.com/t/running-multi-gpu-workload-vllm-with-docker-swarm-ipc-limitation/150373 "2025-11-10T07:12:42Z")
Hi everyone, I’m trying to run vLLM (an LLM inference engine) on Docker Swarm with tensor parallelism across multiple GPUs. The issue is that vLLM requires --ipc=host for NCCL communication between GPUs, but Docker S… --- ## [How do you replicate volumes?](https://forums.docker.com/t/how-do-you-replicate-volumes/150329)
**Author:** [@gapoly](https://forums.docker.com/u/gapoly)\ **Replies:** 2\ **Last updated:** [November 5, 2025, 8:14pm UTC](https://forums.docker.com/t/how-do-you-replicate-volumes/150329 "2025-11-05T20:14:54Z")
Hello, I’m trying to learn how to use Docker Swarm and have a cluster with High Availability. On Docker Swarm you can have replicated containers. If one node is off, the containers are up on another node BUT if a contai… --- ## [Swarm & Harbor: Docker login constantly failing with "http: server gave HTTP response to HTTPS client"](https://forums.docker.com/t/swarm-harbor-docker-login-constantly-failing-with-http-server-gave-http-response-to-https-client/150271)
**Author:** [@adelallave](https://forums.docker.com/u/adelallave)\ **Replies:** 1\ **Last updated:** [October 31, 2025, 7:30pm UTC](https://forums.docker.com/t/swarm-harbor-docker-login-constantly-failing-with-http-server-gave-http-response-to-https-client/150271 "2025-10-31T19:30:12Z")
Hello to the community, I’m reaching because I’ve been trying to troubleshoot this issue for a few days now, and I’m literally getting crazy. I’m working with a SWARM environment with multiple nodes deployed (1 manager… --- ## [Docker Swarm: Service Resolution Fails Between Ubuntu and CentOS Nodes](https://forums.docker.com/t/docker-swarm-service-resolution-fails-between-ubuntu-and-centos-nodes/149983)
**Author:** [@fgonzalezms](https://forums.docker.com/u/fgonzalezms)\ **Replies:** 6\ **Last updated:** [October 8, 2025, 6:10pm UTC](https://forums.docker.com/t/docker-swarm-service-resolution-fails-between-ubuntu-and-centos-nodes/149983 "2025-10-08T18:10:32Z")
I have an existing, working Swarm cluster with three nodes, and I want to add a new one. The three existing nodes are running CentOS 7, and the new one is running Ubuntu 22.04.5 LTS. All four servers are on the same net… --- ## [Port forwarding into container on overlay network with docker swarm does not work](https://forums.docker.com/t/port-forwarding-into-container-on-overlay-network-with-docker-swarm-does-not-work/149964)
**Author:** [@pzonet](https://forums.docker.com/u/pzonet)\ **Replies:** 15\ **Last updated:** [October 7, 2025, 8:38am UTC](https://forums.docker.com/t/port-forwarding-into-container-on-overlay-network-with-docker-swarm-does-not-work/149964 "2025-10-07T08:38:58Z")
Hello, I have two hosts (two VMs), where each host will run two containers each, one app and one database (YugabyteDB). The containers will be deployed with two different docker compose files. The two hosts have IPs 193… --- ## [Docker Host with High load on NFS failover](https://forums.docker.com/t/docker-host-with-high-load-on-nfs-failover/149602)
**Author:** [@romgo](https://forums.docker.com/u/romgo)\ **Replies:** 5\ **Last updated:** [September 9, 2025, 9:01pm UTC](https://forums.docker.com/t/docker-host-with-high-load-on-nfs-failover/149602 "2025-09-09T21:01:17Z")
Dear cmmunity, I’m running a swarm cluster 9 nodes running on debian 12 hosts. Some of the service I deployed use a NFS share for persistence. I use the mount of NFS directly through docker file to avoid any mismatc… --- ## [Slow ss/scp download speeds with published ports in mesh network](https://forums.docker.com/t/slow-ss-scp-download-speeds-with-published-ports-in-mesh-network/149425)
**Author:** [@jonakarl](https://forums.docker.com/u/jonakarl)\ **Replies:** 15\ **Last updated:** [August 28, 2025, 11:16am UTC](https://forums.docker.com/t/slow-ss-scp-download-speeds-with-published-ports-in-mesh-network/149425 "2025-08-28T11:16:47Z")
Hi, The scp download (but not upload) speed is very slow from a container to a external pc over the mesh network, is there a way to configure the mesh network to be faster? Background: We have a docker swarm network w… --- ## [Docker Swarm - Issue with Routing Mesh not routing Published Port on all Nodes](https://forums.docker.com/t/docker-swarm-issue-with-routing-mesh-not-routing-published-port-on-all-nodes/123780)
**Author:** [@jmcombs](https://forums.docker.com/u/jmcombs)\ **Replies:** 18\ **Last updated:** [July 29, 2025, 7:15pm UTC](https://forums.docker.com/t/docker-swarm-issue-with-routing-mesh-not-routing-published-port-on-all-nodes/123780 "2025-07-29T19:15:55Z")
Background I have a 3 node Docker Swarm running with one Manager node utilizing Overlay networking. The Ingress overlay network configuration is default configuration. (Manager) Node 1: 192.168.7.236 Node 2: 192.168.7… --- ## [Docker Swarm DNS resolution (WAS: multiple networks)](https://forums.docker.com/t/docker-swarm-dns-resolution-was-multiple-networks/137488)
**Author:** [@sstt](https://forums.docker.com/u/sstt)\ **Replies:** 9\ **Last updated:** [July 27, 2025, 12:42pm UTC](https://forums.docker.com/t/docker-swarm-dns-resolution-was-multiple-networks/137488 "2025-07-27T12:42:42Z")
I have set up an overlay network “public”. This functions as I would expect. I have a stack file with two services, a and b. a is an auxiliary service for b. These also work fine, as I would expect. I now desire b to b… --- ## [Docker Swarm running on Ubuntu 24.04 on 3 VM created on ProxMox not accepting http request](https://forums.docker.com/t/docker-swarm-running-on-ubuntu-24-04-on-3-vm-created-on-proxmox-not-accepting-http-request/148883)
**Author:** [@chipcorrera1](https://forums.docker.com/u/chipcorrera1)\ **Replies:** 7\ **Last updated:** [July 21, 2025, 9:32am UTC](https://forums.docker.com/t/docker-swarm-running-on-ubuntu-24-04-on-3-vm-created-on-proxmox-not-accepting-http-request/148883 "2025-07-21T09:32:00Z")
I am unable to get a docker swarm configured to accept HTTP connection to an nginx service. I created 3 brand new Virtual Machines on my Proxmox install. None are running any firewalls via Proxmox or Ubuntu. Each VM h… --- ## [Docker Swarm - Zero Downtime](https://forums.docker.com/t/docker-swarm-zero-downtime/148802)
**Author:** [@arunalavala1996](https://forums.docker.com/u/arunalavala1996)\ **Replies:** 4\ **Last updated:** [July 12, 2025, 9:13pm UTC](https://forums.docker.com/t/docker-swarm-zero-downtime/148802 "2025-07-12T21:13:15Z")
Hi there, in our Docker swarm, we are creating services using the below commands, but while removing and creating services, we are facing downtime. sudo docker build . -t example:0.0.1 --build-arg sudo docker tag fees:… --- ## [OCI runtime exec failed: ... fork/exec /proc/self/fd/7: no such file or directory](https://forums.docker.com/t/oci-runtime-exec-failed-fork-exec-proc-self-fd-7-no-such-file-or-directory/148741)
**Author:** [@fgchinformatik](https://forums.docker.com/u/fgchinformatik)\ **Replies:** 16\ **Last updated:** [July 11, 2025, 7:59am UTC](https://forums.docker.com/t/oci-runtime-exec-failed-fork-exec-proc-self-fd-7-no-such-file-or-directory/148741 "2025-07-11T07:59:34Z")
Hello I have a Docker Swarm setup with 10 containers. Docker Swarm runs in a VM, data center, VM-Ware. The swarm consists of only one machine. I do not need high availability. When I restart the VM, several containe… --- ## [Docker "ingress" network cannot be configured as internal](https://forums.docker.com/t/docker-ingress-network-cannot-be-configured-as-internal/148430)
**Author:** [@teapot9](https://forums.docker.com/u/teapot9)\ **Replies:** 4\ **Last updated:** [June 6, 2025, 2:52pm UTC](https://forums.docker.com/t/docker-ingress-network-cannot-be-configured-as-internal/148430 "2025-06-06T14:52:39Z")
When I configure the Docker Swarm ingress network with --internal, the configuration is correctly applied. However, as soon as I create a service with a port published in ingress mode, Docker automatically switches Ingre… --- ## [Using NVIDIA GPU with docker swarm started by docker-compose file](https://forums.docker.com/t/using-nvidia-gpu-with-docker-swarm-started-by-docker-compose-file/106688)
**Author:** [@markuspatzold](https://forums.docker.com/u/markuspatzold)\ **Replies:** 3\ **Last updated:** [May 25, 2025, 11:07am UTC](https://forums.docker.com/t/using-nvidia-gpu-with-docker-swarm-started-by-docker-compose-file/106688 "2025-05-25T11:07:22Z")
Hi there, I have multiple GPU machines and want to run docker swarm on them where each image uses 1 of the available Nvidia GPUs. I can’t find a good solution online. I can run the following docker-compose file with do… --- ## [Docker swarm rebuilds all containers at different times](https://forums.docker.com/t/docker-swarm-rebuilds-all-containers-at-different-times/98761)
**Author:** [@ajozz13](https://forums.docker.com/u/ajozz13)\ **Replies:** 16\ **Last updated:** [May 8, 2025, 2:32pm UTC](https://forums.docker.com/t/docker-swarm-rebuilds-all-containers-at-different-times/98761 "2025-05-08T14:32:08Z")
Hello, We are trying to figure out why docker swarm is suddenly rebuilds We see this entry in the log Sep 17 02:10:00 rincewind dockerd\[1328\]: time=“2020-09-17T02:10:00.095327640-04:00” level=error msg=“heartbeat to m… --- ## [On-prem docker swarm deployment with HA](https://forums.docker.com/t/on-prem-docker-swarm-deployment-with-ha/49146)
**Author:** [@saqibahmed515](https://forums.docker.com/u/saqibahmed515)\ **Replies:** 6\ **Last updated:** [May 7, 2025, 8:36am UTC](https://forums.docker.com/t/on-prem-docker-swarm-deployment-with-ha/49146 "2025-05-07T08:36:31Z")
Hi there! I’m doing on-prem deployments using docker swarm and I need application and DB high availability. As far as application HA is concerned, it works great within docker (service discovery and load balancing), bu… --- ## [MAC and IP address duplication in 3 node Swarm MACVLAN](https://forums.docker.com/t/mac-and-ip-address-duplication-in-3-node-swarm-macvlan/147971)
**Author:** [@am4c130d](https://forums.docker.com/u/am4c130d)\ **Replies:** 11\ **Last updated:** [May 4, 2025, 12:00pm UTC](https://forums.docker.com/t/mac-and-ip-address-duplication-in-3-node-swarm-macvlan/147971 "2025-05-04T12:00:14Z")
Hi, I have 3 node docker swarm. I’m trying to run a number of applications that use multicast for discovery and decided to use MACVLAN so that they’d have an IP address on the existing subnet. Using portainer, I configu… --- ## [Losing my mind over docker swarm NFS mounts](https://forums.docker.com/t/losing-my-mind-over-docker-swarm-nfs-mounts/147847)
**Author:** [@spekta23](https://forums.docker.com/u/spekta23)\ **Replies:** 8\ **Last updated:** [April 27, 2025, 9:46am UTC](https://forums.docker.com/t/losing-my-mind-over-docker-swarm-nfs-mounts/147847 "2025-04-27T09:46:44Z")
I know it might not be perfect and I have portainer and other services running without issue. This image requires lots of different subdirectories. Based on my admittedly limit knowledge ht best approach here was discret… --- ## [Tasks can't communicate via overlay network when running on different swarm nodes](https://forums.docker.com/t/tasks-cant-communicate-via-overlay-network-when-running-on-different-swarm-nodes/132062)
**Author:** [@derjudge](https://forums.docker.com/u/derjudge)\ **Replies:** 10\ **Last updated:** [April 23, 2025, 6:54am UTC](https://forums.docker.com/t/tasks-cant-communicate-via-overlay-network-when-running-on-different-swarm-nodes/132062 "2025-04-23T06:54:32Z")
Hi everyone. When I create an attachable overlay-network on my swarm, the tasks/containers attached to it can’t talk to each other when running on different swarm nodes. If they are running on the same node, everything … [Next page](https://forums.docker.com/c/docker-engine/swarm/17.md?page=1)