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variablesconfigurationhaproxyenvironmentportforwarding

Using environment variable in HAProxy config listen isn't working

here is my simple listen section of the haproxy config file:

listen graph_front
   bind *:8182
   mode tcp
   server graph_server graph.server.com:8182

this works just fine, but I need the address and port to be a environment variable. So I changed it to this:

listen graph_front
   bind *:8182
   mode tcp
   server graph_server "$GRAPH_ADDRESS":"$GRAPH_PORT"

the haproxy server restarts just fine, but it no longer forwards to the address in the environment variables.

any ideas?

Solution

  • The above config was fine. It was the way I was starting haproxy. I have to start it directly with

    haproxy -f /path/to/config

    this will not work with out elevated privileges. So, next

    sudo haproxy -f /path/to/config

    of course the env variables are not passed through sudo. So a more direct way like this works:

    sudo -- sh -c 'export GRAPH_ADDRESS=graph.server.com; export GRAPH_PORT=8182; haproxy -f /etc/haproxy/haproxy.cfg