support/templates/consul/config.json.erb

{
  "data_dir": "consul/data",
  "enable_local_script_checks": true,
  "services": [
    <% (min_port..max_port).each_with_index do |port, index| %>
    <%= index == 0 ? "" : "," %>
    {
      "id": "pgbouncer-<%= port %>",
      "name": "pgbouncer",
      "port": <%= port %>,
      "address": "127.0.0.1",
      "tags": [
        "replica"
      ],
      "checks": [
        {
          "args": ["psql", "-U", "<%= config.__whoami %>", "-h", "localhost", "-p", "<%= port %>", "-d", "gitlabhq_development", "-c", "select 1"],
          "interval": "2s"
        }
      ]
    }
    <% end %>
  ]
}