nginx_config/nginx-upstreams.ctmpl

upstream api-grafana {
    {{range service "grafana-web-ui" "any"}}
    server {{.Address}}:{{.Port}};
    {{end}}
}
upstream api-consul {
    {{range service "consul-rest" "any"}}
    server {{.Address}}:{{.Port}};
    {{end}}
}
upstream api-docker {
    {{range service "portainer" "any"}}
    server {{.Address}}:{{.Port}};
    {{end}}
}