Websockets for Synology DSM

It’s happened to me several times now that an application I run on my DS 1817+ has problems with websockets. This is because I use the reverse proxy built into DSM, which does not support websockets by default. For this reason, here’s a little tutorial on how to enable Websockets for Synology DSM reverse proxy.

Enable Websockets in DSM Reverse Proxy

Actually, it is extremely easy to enable Websockets for Synology DSM reverse proxy:

  1. Open Control Panel > Application Portal
  2. Change to the Reverse Proxy tab
  3. Select the proxy rule for which you want to enable Websockets and click on Edit
  4. Change to the Custom Headers tab
  5. Add two entries in the list:
    • Name: “Upgrade”, Value: “$http_upgrade”
    • Name: “Connection”, Value: “$connection_upgrade”

Repeat these steps for every rule where you want to enable Websockets.

In my local setup, I need this for GitLab Mattermost (running within a docker container) and DSM Virtual Machine Manager Console.

Raspberry Pi Kubernetes Cluster

In order to gain experience with a Kubernetes cluster or to be able to experiment with it, a functioning cluster is required. Since most conceptual challenges do not require a high performance test cluster, it is also sufficient to build a smaller and therefore more cost-effective one. For this reason I decided to set up a Raspberry Pi Kubernetes Cluster for testing purposes.

Shopping List

If the Raspberry Pis are not to be connected via WLAN but cable, the corresponding network components are also required:

Set up

The website of Hypriot has a very good tutorial how to set up a Kubernetes cluster with Raspberry Pi boards: https://blog.hypriot.com/post/setup-kubernetes-raspberry-pi-cluster/. If you need some configuration examples (executable on a Raspberry Pi Kubernetes Cluster) please check out my GitHub repository with configuration examples: https://github.com/MatthiasLohr/kubernetes-rpi-examples.

HP Elite Thunderbolt Dock Firmware Update

Docking stations are quite a pleasant thing, because they save you having to plug in and out a lot of different cables (network, USB, monitors, power,…). Meanwhile, docking solutions via USB-C/Thunderbolt are also available. This means that a single USB cable is all it takes to connect the computer to the peripherals and the power supply. Practically USB-C or Thunderbolt are standards, so you can combine different devices like the HP Elite Thunderbolt Dock with a Lenovo X1 Carbon, right?

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