host_path - is not a valid absolute path (docker stack file)

[swapnil7434]

I have created docker stack file with following configuration

nginx:
image: 'nginx:latest'
ports:

• '80:80'
• '443:443'
  tags:
• app=cornerstone
• env=dev
  volumes:
• '/etc/nginx/conf.d'
• '/etc/nginx/vhost.d'
• '/usr/share/nginx/html'
• '../../../volumes/proxy/certs:/etc/nginx/certs:r'
  labels:
• 'com.github.jrcs.letsencrypt_nginx_proxy_companion.nginx_proxy'
  nginx-gen:
  image: 'jwilder/docker-gen:latest'
  tags:
• app=cornerstone
• env=dev
  volumes_from:
• nginx
  volumes:
• '/var/run/docker.sock:/tmp/docker.sock:ro'
• '../../../volumes/proxy/templates:/etc/docker-gen/templates:ro'

labels:

• 'com.github.jrcs.letsencrypt_nginx_proxy_companion.docker_gen'
  command: '-notify-sighup nginx -watch -wait 5s:30s /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf'
  nginx-letsencrypt:
  image: 'jrcs/letsencrypt-nginx-proxy-companion:latest'
  tags:
• app=cornerstone
• env=dev
  volumes_from:
• nginx
  volumes:
• '/var/run/docker.sock:/var/run/docker.sock:ro'
• '../../../volumes/proxy/certs:/etc/nginx/certs:rw'

But when i am redeploying file, i am getting following error.

Service 'nginx': {u'binddefinition': {u'host_path': [u"'host_path': ../../../volumes/proxy/certs is not a valid absolute path"]}}

[VincentGuyader]

why do not replace ../../../volumes/proxy/certs with an absolute path such as
/folder/folder/folder/volumes/proxy/certs ?