Hi all,
I'm attempting to setup mysql load balancing using HA/Proxy. Seemed pretty
straight forward at first.
I'm using Amazon ec2 for all nodes. First I made sure that the
haproxy nodes could contact the mysql boxes by opening up the security
group from the mysql boxes to the haproxy ones on port 3306.
I setup the following config:
global
log 127.0.0.1 local0 notice
user haproxy
group haproxy
defaults
log global
retries 2
timeout connect 3000
timeout server 5000
timeout client 5000
listen mysql-cluster
bind 127.0.0.1:3306
mode tcp
option mysql-check user haproxy_check
balance roundrobin
server mysql-1 10.10.10.10:3306 check
server mysql-2 10.10.10.11:3306 check
listen 0.0.0.0:80
mode http
stats enable
stats uri /
stats realm Strictly\ Private
stats auth admin:secret
And ensured that haproxy could bind to non local IP's:
[root@ha1:/etc/haproxy] #grep ipv4 /etc/sysctl.conf
net.ipv4.ip_nonlocal_bind=1
[root@ha1:/etc/haproxy] #sysctl -p
net.ipv4.ip_nonlocal_bind = 1
Yet when I try to start up haproxy I get the following result:
[root@ha1:/etc/haproxy] #systemctl status haproxy
haproxy.service - HAProxy Load Balancer
Loaded: loaded (/usr/lib/systemd/system/haproxy.service; enabled)
Active: inactive (dead) since Fri 2015-07-24 03:44:18 UTC; 9s ago
Process: 25034 ExecStart=/usr/sbin/haproxy-systemd-wrapper -f
/etc/haproxy/haproxy.cfg -p /run/haproxy.pid (code=exited, status=0/SUCCESS)
Main PID: 25034 (code=exited, status=0/SUCCESS)
Jul 24 03:44:18 ha1 systemd[1]: Starting HAProxy Load Balancer...
Jul 24 03:44:18 ha1 systemd[1]: Started HAProxy Load Balancer.
Jul 24 03:44:18 ha1 haproxy-systemd-wrapper[25034]:
haproxy-systemd-wrapper: executing /usr/sbin/haproxy -f
/etc/haproxy/hap...id -Ds
Jul 24 03:44:18 ha1 haproxy-systemd-wrapper[25034]: [ALERT] 204/034418
(25035) : *Starting proxy mysql-cluster: cannot bind s...:3306]*
Jul 24 03:44:18 ha1* h*aproxy-systemd-wrapper[25034]:
haproxy-systemd-wrapper: exit, haproxy RC=256
Hint: Some lines were ellipsized, use -l to show in full.
So it seems that haproxy is expecting to have mysql already listening on
port 3306. But mysql is runnign on two external nodes with port 3306 open
to the two haproxy machines.
What am I doing wrong? And how can I get this to work?
Thanks,
TIm
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