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Examples

Custom HTTP headers in health check

This example adds the Host header to the health check executed by HAProxy:

{
  "id":"app",
  "labels":{
    "HAPROXY_GROUP":"external",
    "HAPROXY_0_BACKEND_HTTP_OPTIONS":"option  httpchk GET {healthCheckPath} HTTP/1.1\\r\\nHost: www\n  timeout check {healthCheckTimeoutSeconds}s\n"
  }
}

Setting timeout for long-lived socket connections

If you're trying to run a TCP service which uses long-lived sockets through HAProxy, such as a MySQL instance, you'll need to set longer timeouts for the backend. Try the following:

{
  "id":"app",
  "labels":{
    "HAPROXY_GROUP":"external",
    "HAPROXY_0_BACKEND_HEAD":"backend {backend}\n  balance {balance}\n  mode {mode}\n  timeout server 30m\n  timeout client 30m\n"
  }
}

The example above will set the client and server timeout to 30 minutes for the specified backend.