I am trying to setup a Docker swarm which connects 3 of my servers together. The swarm is setup and going to the URL I get the same result, which is perfect and just what I need.
However, for the server in which I am working on now I am producing a global nginx on every server in order to allow load balancing.
Sitting on the server will be multiple config files which I need in order to map the domain to the correct folder, which is the part which I am stuck on/not working for me.
I have a really simple docker-compose.yml as I have shrunk it in order to debug the issue, it consists of the following...
version: '3'
services:
nginx:
image: nginx:latest
volumes:
- /var/www/nginx/config/:/etc/nginx/conf.d/:ro
deploy:
mode: global
The volume is coming back with the error "invalid mount config for type "bind": bind source path does not exist" so obviously when I remove the volume line it works perfectly, however I 100% need this line.
I can, inside of the server navigate perfectly to /var/www/nginx/config/ and my config files exist within. Same with the other, if I run docker exec -it <container> /bin/bash and navigate to /etc/nginx/conf.d I can get to there perfectly fine which is why I'm posting on here.
I've looked at other posts and done what other people have said have fixed it such as
But nothing seems to be working
The potential issue could be that not all the nodes in your swarm cluster have the directory (/var/www/nginx/config/) created. Since in swarm the service can be placed in any of the available nodes(unless you put in a constraint) you might be seeing this error.
Make sure that you have this directory created in all the 3 nodes.
Additionally you can also have a look here for defining configs.