docker swarm 为一个节点中的所有副本提供服务

Question

I created a swarm with 4 node, 2 manager, 2 worker. one of the manager is in drain mode. i am running 3 replicas of an nginx based web app built using vue.js only, no backend, no db. now when i run the docker service ls command, i get the following:

$ docker service ls
ID                  NAME                  MODE                REPLICAS  
4nk9b9zm3rlp        friendly_hugle        replicated          0/3                    
qwqj07gu03zu        intelligent_khayyam   replicated          0/3                    
37tol0zrs82n        strange_hodgkin       replicated          0/3                    
dvl4r0vimqtd        suspicious_greider    replicated          3/3                   

why all my replicas are running on one node (3/3)? Just started learning docker.

Answer 1

run the command,Check whether the running node is in normal state,

docker node ls
docker service ps strange_hodgkin