Querying haproxy data using socat from CLI

Currently (most users) I don’t have any way to check the haproxy status in a TripleO virtual deployment (via web-browser) if not previously created some tunnels enabled for that purpose.

So let’s check some haproxy data from our controller.

Check the controller IP:

nova-list

Connect to the controller:

ssh [email protected]

Now, we need to have installed socat:

sudo yum install -y socat

By default haproxy it’s already configured to dump stats data to /var/run/haproxy.sock, now let’s query haproxy get some data from it:

• Show details like haproxy version, PID, current connections, session rates, tasks, among others.

echo "show info" | socat unix-connect:/var/run/haproxy.sock stdio

• Echo the stats about all frontents and backends as a csv.

echo "show stat" | socat unix-connect:/var/run/haproxy.sock stdio

• Display information about errors if there are any.

echo "show errors" | socat unix-connect:/var/run/haproxy.sock stdio

• Display open sessions.

echo "show sess" | socat unix-connect:/var/run/haproxy.sock stdio