# Degraded LoadBalancer Ingress Endpoint Performance (AWS)

## Problem

A Kubernetes LoadBalancer Ingress endpoint for a particular service is slow to respond (± \~3 seconds).

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```none
❯ httpstat http://[SVC/LB Ingress FQDN]:8080/health
Connected to X.X.X.X:8080 from 127.0.0.1:62137
HTTP/1.1 200x-request-id: fae0bb7f-9a9b-402d-84a6-a1d1438820a7
Content-Type: application/vnd.spring-boot.actuator.v3+json
Content-Length: 15  
DNS Lookup TCP Connection Server Processing Content Transfer[ 6ms | 0ms | 20045ms | 1ms ] | | | | namelookup:6ms | | | connect:6ms | | starttransfer:20051ms | total:20052ms
```

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## Environment

* Platform9 Managed Kubernetes - All Versions
* AWS Cloud Provider
* Flannel

## Cause

Flannel is unable to contact etcd. A firewall appliance may be present within the VPC which is blocking the traffic, especially on Port 4001 which is required for etcd communication as per the [Networking Prerequisites](https://platform9.com/docs/bare-metal/networking-prerequisites).

## Resolution

1. Whitelist the ports called out in the [Networking Prerequisites](https://platform9.com/docs/bare-metal/networking-prerequisites), especially for etcd.
2. Restart Flannel on the worker node(s).

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```none
$ docker stop flannel
$ docker start flannel
```

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