HAProxy doesn't start, can not bind UNIX socke

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.

Answer 2

I ran into this problem and had to remove the /run/haproxy/admin.sock file for HAProxy to restart successfully. I can only think it became corrupted after I aborted a yum update command. Oops!

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