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Docker swarm nodes not responding


#1

I am working on a docker application in which I have created a trial repository for testing docker swarm. I have created a docker-compose.yml file and pointing it to my public repository. Without the swam mechanism, it works fine, but I am not getting any response when I have it inside swarm.

docker-compose.yml :

version: "3"
services:
  web:
   image: repo-link
   deploy:
     replicas: 5
     resources:
       limits:
         cpus: "0.1"
         memory: 50M
     restart_policy:
       condition: on-failure
   ports:
     - "4000:80"
   networks:
     - webnet
networks:
  webnet:

I can see the VMs running properly with a leader :slight_smile:

docker-machine ls
NAME    ACTIVE   DRIVER       STATE     URL                         SWARM   DOCKER     ERRORS
myvm1   *        virtualbox   Running   tcp://192.168.99.100:2376           v18.09.0   
myvm2   -        virtualbox   Running   tcp://192.168.99.101:2376           v18.09.0   

PS command :slight_smile:

docker stack ps project
ID                  NAME                 IMAGE                              NODE                DESIRED STATE       CURRENT STATE            ERROR               PORTS
mdb4b82nnkvu        project_web.1   username/project:part1   myvm2               Running             Running 13 minutes ago                       
shf6qmhzbtaq        project_web.2   username/project:part1   myvm2               Running             Running 13 minutes ago                       
ou5hy1uz6sh9        project_web.3   username/project:part1   myvm1               Running             Running 13 minutes ago                       
kv4rvq1huxv4        project_web.4   username/project:part1   myvm2               Running             Running 13 minutes ago                       
xtbc20orfd58        project_web.5   username/project:part1   myvm1               Running             Running 13 minutes ago     

Commands used :

docker-machine create --driver virtualbox myvm1
docker-machine create --driver virtualbox myvm2
docker-machine ssh myvm1 "docker swarm init --advertise-addr <myvm1 ip>"
docker-machine ssh myvm2 "docker swarm join --token TOKEN 192.168.99.100:2377"
eval $(docker-machine env myvm1)
docker stack deploy -c docker-compose.yml project
sudo iptables -I INPUT -p tcp -m tcp --dport 7946 -j ACCEPT
sudo iptables -I INPUT -p udp -m udp --dport 4789 -j ACCEPT

I still cant get any response on localhost or Curl, it just says unable to connect. What am I doing wrong?


#2

I have the same problem but I do not know the cause.
By the way single run on virtual machine works

docker run -p 4000:80 username/project:part1

Also the swarm works on physical machine.
So may be the problem is in docker shipped with boot2docker.iso, misconfiguration of docker or in misconfiguration of virtualbox/virtual machine.

a duplicate Swarm does not accept connection if running on VM (created by docker-machine)?


#3

Please see answer here Swarm does not accept connection if running on VM (created by docker-machine)
As it seems you faced the same problem.