HAProxy doesn't start, can not bind UNIX socket [/run/haproxy/admin.sock]

Question

I'm trying to start haproxy (version 1.5.8 2014/10/31) with an "empty" config file and I get:

user@server:~$ sudo service haproxy start [....] Starting haproxy: haproxy[ALERT] 126/120540 (7363) : Starting frontend GLOBAL: cannot bind UNIX socket [/run/haproxy/admin.sock] 

altough it's enabled:

user@server:~$ cat /etc/default/haproxy  # Set ENABLED to 1 if you want the init script to start haproxy. ENABLED=1 

Configuration file:

global     log /dev/log    local0     log /dev/log    local1 notice     chroot /var/lib/haproxy     stats socket /run/haproxy/admin.sock mode 660 level admin     stats timeout 30s     user haproxy     group haproxy     daemon      # Default SSL material locations     ca-base /etc/ssl/certs     crt-base /etc/ssl/private      # Default ciphers to use on SSL-enabled listening sockets.     # For more information, see ciphers(1SSL).     ssl-default-bind-ciphers kEECDH+aRSA+AES:kRSA+AES:+AES256:RC4-SHA:!kEDH:!LOW:!EXP:!MD5:!aNULL:!eNULL     ssl-default-bind-options no-sslv3  defaults     log     global     mode    http     option  httplog     option  dontlognull     timeout connect 5000     timeout client  50000     timeout server  50000     errorfile 400 /etc/haproxy/errors/400.http     errorfile 403 /etc/haproxy/errors/403.http     errorfile 408 /etc/haproxy/errors/408.http     errorfile 500 /etc/haproxy/errors/500.http     errorfile 502 /etc/haproxy/errors/502.http     errorfile 503 /etc/haproxy/errors/503.http     errorfile 504 /etc/haproxy/errors/504.http 

Does anyone have an idea why it can't start?

Answer 1

Haproxy needs to write to /run/haproxy/admin.sock but it wont create the directory for you. Create the directory /run/haproxy/ first or set stats socket to a different path.