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I use Docker 18.09.0, in a swarm with 4 master nodes on ubuntu 16.0.4 at digital ocean droplets. In most cases the swarm behavior fine. Sometimes the internal DNS answers with two service IPs for one service, after several docker service rm <service_name> and docker stack deploy ... command. The services are connected to one overlay network.

13.09.2017 · Description A swarm cluster on our internal network is using an internal DNS server address 10.0.0.20. NOTE: this is not the same network as the swarm cluster. A swarm overlay network is using 10.0.0.0/24. Containers attached to this net...

... configuration (as per the lets-nginx project) in a docker swarm:services: ... Is there a better and automatic way to make the nginx container refresh ...

20.05.2020 · Description Updating to docker-ce 19.03.9 breaks DNS resolution inside compose managed stack. Steps to reproduce the issue: Test docker-compose.yml file: version: "3.7" services: centos: image: "centos:7" init: true tty: true networks: t...

Install and Configure a Swarm Cluster with DNS Service on PhotonOS Overview. In this How-To, the steps for installing and configuring a Docker Swarm cluster, alongside DNS and Zookeeper, will be presented. The cluster that will be set up will be on VMware Photon hosts.

Create Docker Swarm cluster. First, you will need to initialize the cluster with the IP address, so your node acts as a Manager node. On the Manager Node, run the following command for advertising IP address: docker swarm init --advertise-addr 192.168.0.103 You should see the following output:

Setting Up The Cluster

Install and Configure a Swarm Cluster with DNS Service on PhotonOS · Overview · Cluster description · Docker Swarm Installation and Configuration.

Nodes

I have just fixed the same problem by running containers in Docker Swarm. Seems like Swarm does something to keep DNS entries up to date. I tried to remove my application container manually using docker rm, scaled it up/down - in every case it's hostname was correctly resolved to existing IP addresses only.. If you can't use Swarm, I guess another solution would be to run …

Is there any way to clear or flush the old entries? If I delete and re-create the network then that flushes it but I don't want to have to do that every time. I create the network: docker network create -d overlay --attachable --subnet 10.0.0.0/24 --gateway 10.0.0.1 --scope swarm -o parent=ens224 overlay1. Then create a container (SQL for this ...

Jun 11, 2020 · However, the DNS resolution issues persisted in Docker. I attempted restarting Docker and restarting my computer, but neither resolved the issues. Finally, I purged all of my Docker data using the Troubleshoot UI, and the DNS resolution issue was solved. Steps to reproduce the issue: Cause a DNS resolution issue at the host

11.05.2017 · From @mcastelino on April 27, 2017 17:37. When running Clear Container based containers in a docker swarm, DNS resolution does not work both for internal and external DNS when the DNS resolution is performed from within the Clear Container.. This is due to the way the DNS resolution is implemented within docker swarm.

13.04.2018 · 在docker 1.10版本中，docker daemon实现了一个叫做 embedded DNS server 的东西，用来当你创建的容器满足以下条件时：. docker daemon就会利用embedded DNS server对整个自定义网络中所有容器进行名字解析（你可以理解为一个网络中的一种服务发现）。. 因此当你启 …

The solution: a Docker DNS cache, using dnsmasq. In order to isolate DNS traffic within the host, we needed a local DNS server to act as a cache ...

I have just fixed the same problem by running containers in Docker Swarm. Seems like Swarm does something to keep DNS entries up to date.

11.06.2020 · DNS was not resolving on my host system for raw.githubusercontent.com, which caused issues in Docker. After resetting the DNS cache in OSX Catalina, I was able to access raw.githubusercontent.com in the host. However, the DNS resolution issues persisted in Docker.

Dec 31, 2021 · Start the Docker Swarm on the manager node and add the worker nodes to the cluster. Start docker swarm on manager node with: # docker swarm init -advertise-addr 10.10.4.44. The docker swarm will initialize and a join-token created for worker nodes:.Output Swarm initialized: current node (fsuaqqpihi2eabmmq8gldzhpv) is now a manager.

Install and Configure a Swarm Cluster with DNS Service on PhotonOS Overview. In this How-To, the steps for installing and configuring a Docker Swarm cluster, alongside DNS and Zookeeper, will be presented. The cluster that will be set up will be on VMware Photon hosts.

30.08.2018 · I am using docker version 18.06.1-ce and compose version 1.22.0. As per docker, it should be possible to call services using service names. This is working for me with docker compose without swarm mode, but on swarm mode it is not working. I have even tried setting aliases in my compose but no result. Below is my docker-compose.yml

If you use the longer syntax (recommended), set the protocol key to either tcp or udp . TCP only. Long syntax: $ docker service create --name dns-cache \ -- ...

When you submit a DNS query for a service name to the Swarm DNS service, it will return one, or all, the IP addresses of the related containers, ...

I'm working in an environment where sometimes the DNS server flakes out and tells you it can't resolve a host (eg. lookup of "github.com" ...

Is there a way to clear DNS entries or force reloading them? Edit: restarting docker on the host hosting the service fixed the lookup ...

When the execution of the vagrant up command is finished, we'll have a commonly used Docker Swarm cluster configuration. The proxy node hosts ...