Error response from daemon: (config) includes invalid characters for a local volume name

Question

I have a running node server which listens on 3 different ports. I have three different subdomains of a url pointing to port 80 of the server on which node is running/listening.

What I am trying to do is proxy pass a request from a sub-domain to its respective port using haproxy.

My node server is dockerized with the ports exposed on the host. I can hit them individually using the server's IP address on their port so they seem to be running fine.

My haproxy will also be running inside a docker container. I am completely new to haproxy though I am fairly confident with dockers. I wrote my haproxy configuration via onine articles and blogs but as soon as I start my docker container using:

docker run --name my-running-haproxy \
  -v ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro \
  haproxy:1.6.2

I get the following error:

Error response from daemon: ./haproxy.cfg includes invalid characters for a local volume name, only [a-zA-Z0-9][a-zA-Z0-9_.-] are allowed

So I tried debugging by removing configuration options until I had a very minimalistic config:

haproxy.cfg

global
    maxconn 256
    debug

defaults
    mode http
    timeout connect 5000ms
    timeout client 50000ms
    timeout server 50000ms

frontend http-in
    bind *:80
    default_backend default-server

backend default-server
    server s0 127.0.0.1:3000

But still I am getting the same error.

Can anyone help me in this?

Answer 1

I had the same problem and solved it by using full path to my config file.

Original

docker run --name my-running-haproxy \
  -v ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro \
  haproxy:1.6.2

Fixed

docker run --name my-running-haproxy \
  -v /usr/local/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro \
  haproxy:1.6.2

Answer 2

$ docker -v
Docker version 1.11.2, build b9f10c9

Using relative path:

Example: ./haproxy.cfg

Example: ./PATH/haproxy.cfg

Example hidden file: ./PATH/.haproxy.cfg

  -v ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro

Using absolute path:

Example: /haproxy.cfg

Example: /PATH/haproxy.cfg

Example hidden file: /PATH/.haproxy.cfg

Example: $PWD/haproxy.cfg

  -v /PATH/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro