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troyfontaine/troubleshoot_haproxy.md

Created January 25, 2016 16:14
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Troubleshooting HAProxy
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troubleshoot_haproxy.md

Troubleshooting HAProxy

Step 1: Verify that HAProxy is running

On ubuntu, run the following command:

sudo service haproxy status

You should see output like below if it is running:

haproxy is running.

Step 2: Verify only one HAProxy process is running:

sudo ps ax | grep haproxy

This should result in output similar to:

  590 ?        Ss     0:00 /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -D -sf 334
  602 pts/0    S+     0:00 grep --color=auto haproxy

This indicates only one HAProxy process is currently running. If you see more than one of the first line-you have launched multiple instances of HAProxy which can cause a lot of unexpected behavior.

To fix this condition, use kill PID where PID represents the process identifier (which is the first column in the output of the above command).

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