DevOps Stack Exchange
DevOps Stack Exchange

Questions tagged [docker-swarm]

Part of the docker software suite to cluster docker servers into a single virtual service.

The swarm uses the normal docker API, thus any software which can communicate with docker, including the command line docker client, can also use a swarm.

Most use cases heavily utilize the feature of the transparent communication of the containers between the docker hosts. Additionally, it simplifies deployment to multiple hosts and provides HA.

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Combine Docker Swarm and Kubernetes

My company is trying to play a little catch-up in the DevOps space. I have been doing a lot of research on containerization of applications and the orchestration systems that go with it. I came across an article (one that I wish I had saved) where…
EvanM
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Options to assign a static ip to a service running in docker swarm

Situation: docker swarm with 3+ nodes service running in the swarm with replicas=1 and restart=always swarm hosts have multiple interfaces - one for each vlan, with the same name service is deployed as a stack I want to replace a service running…
vlad b.
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Assign DNS name to Docker Swarm containers with public IPv6

I'm trying to understand how I would set up a Docker container (running in Swarm mode) with publicly available IPv6. I know Docker Swarm uses mesh routing, but I don't quite understand how I can dynamically assign DNS names to addresses. As an…
JacksGT
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Flask, Gunicorn and Docker Swarm

so I have this nice rest API implemented in Flask running in docker and I am thinking about scaling. This is how I progressed: CMD ["flask", "run", "--host=0.0.0.0"] and docker run -d -p 5000:5000 pyrest-alpine works fine CMD ["gunicorn", "-w",…
Ondra N.
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Docker stack deploy doesn't pull images

I'm launching through Ansible (just SSH basically) a docker stack deploy, the issue is also true when launching directly from a manager: docker stack deploy --prune --with-registry-auth -c /docker/docker-compose.yml "test-stack" I have my…
jayooin
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How to Shutdown Docker Stack on Container Failure

Say I have several docker services using swarm defined as such: version : '3' services: server: image : my_server:latest deploy: replicas: 5 restart_policy: any database: image : my_db:latest …
Nyarmith
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Will Docker Swarm work if masters are spread over 3 continents?

I need to deploy a highly available Docker Swarm on Azure. I created a VNet in 3 locations: Brazil South (my location), East US and West Europe. Then I enabled network peering so VMs in these locations can see each other as if they were in the same…
Igor Gatis
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Docker swarm join linux container Error - remote CA does not match fingerprint

Start docker swarm : docker swarm init --advertise-addr MANAGER-IP Join docker swarm: docker swarm join --token MANAGER-IP:2377 I am using Windows 10, it is working fine with Windows container mode, but gives below error in Linux container…
Nitul
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Load balancing kubernetes cluster on budget KVM provider?

There are a lot of cheap KVM providers these days that offer simple nodes with just a single external IP per node, without any load balancing. What is a typical budget load balancing solution for this scenario? I am planning to use either docker…
barrymac
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Docker swarm stop spin up containers at 250

TLDR: Docker won't spin up more then 250 containers. I'm deploying a cluster of 3 docker services to a swarm with 2 nodes. 2 of the services need to contain 1 container (have a replicas: 1 in the docker-compose file), and the third service need to…
nirgn
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Access private DockerHub repo in Docker Swarm

I am trying to deploy a docker swarm using Digital Ocean's docker-machine driver. This is currently a single node that contains several public DockerHub images, and one private. I am having difficulties in configuring it to accept the private…
DannyB
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How to fix a "heartbeat failure" in Docker Swarm?

My cluster is currently located in a single data center. I've been trying to change that by adding a single worker node from another data center, but so far it hasn't worked. I'm able to make this node join the swarm and get listed by the managers,…
ivarec
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How do I prevent service A from being placed in the same node as service B in Docker Swarm?

From the docs, I could only find information about placement restrictions based on node attributes, likes labels and its role. However, I couldn't find how to configure placement based on the services already running on a given node. How can I do…
ivarec
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Docker managers are losing quorum on AWS

I have deployed Docker EE on AWS by choosing the package directly from the AWS Marketplace: Docker EE for AWS (Standard/Advanced) - BYOL. The cluster has been successfully launched and deployed on AWS. After deploying several stacks on the UCP…
ibedelovski
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Docker MongoDB image - How to specify credentials other than in the compose file?

I'm using this docker image https://hub.docker.com/_/mongo/. That image provides a way of initializing a mongodb root database user with env variables which I can specify in the compose file as follows: environment: - MONGO_INITDB_DATABASE=db -…
joe.js
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