HAProxy: [ALERT] sendmsg logger #2 failed: Resource temporarily unavailable (errno=11)

[ayashjorden]

Hi,
Opening here as the error message is coming from the bundled HAProxy component in MLB container.

Context:

When running MLB without enabling the /devlog device for HAProxy, I'm getting blasted with:
[ALERT] 228/081350 (412) : sendmsg logger #2 failed: No such file or directory (errno=2)

After enabling the /dev/log device:

1. I've started seeing HAProxy log messages
2. I'm getting blasted with:
   [ALERT] 228/081044 (10579) : sendmsg logger #2 failed: Resource temporarily unavailable (errno=11)

I've searched online for similar solutions but all I found is not MLB related.
Tried restarting the rsyslog daemon, didn't help.

UPDATE: Found this issue which is related.

Questions

Can someone shed some light here?
Why mounting the /dev/log device into the MLB container didn't help?
Can someone elaborate on how to configure rSyslog on the host machine to support HAProxy logging to /dev/log ?

Running on CentOS7.3.1611

Thank you,
Yarden

[petr-k]

We're also facing the same issues.. would be cool if somebody could explain what the correct configuration should look like. Thanks! ;)

[sureshcvh]

1. Increased the Max datagram queue length (/proc/sys/net/unix/max_dgram_qlen via sysctl --> sysctl -w net.unix.max_dgram_qlen=100) from 10 to 100.

and

2.restarted the syslog (sudo service rsyslog restart).

Alerts stopped showing.

[treborbg]

In my case syslog service was faulty, I restart it and I was able to move on.
service syslog restart