What you should do after you got a new machine?

2023-09-05 0:05:54

[开发运维 | Dev Ops] ,

The following steps can help improve your machine's network performance. One way to improve your machine's network performance is by adjusting the TCP windows and using a better congestion control algorithm. In addition to improving network performance, it may be necessary to prepare your environment for using Kubernetes as well.


How to mount a QCOW2 drive

2023-06-25 11:10:03

[开发运维 | Dev Ops] ,

qcow2 file is a common disk file for virtual machines. We don't have to run the VM to gain access to the qcow file system.
It can be mounted directly with a little tweak to the host machine.

How to set up Kubernetes (K3s) cluster on two machines

Kubernetes are very useful for managing servers at a scale. Someone might ask, I don't have more than 3 servers to manage. Should I go for Kubernetes, or could we use Docker or Docker Compose?

In the past several years, I would suggest we could just use Docker Compose. But seeing that more mature and lightweight Kubernetes solutions appeared, I changed my mind and started using Kubernetes if I had more than two machines to manage (or even one machine). I think K3s is a good distribution of Kubernetes which has a relatively small footprint in case you have a small cluster. Comparing it to running the container naked using Docker compose, using K3s will require you to run a few extra Kubernetes administrative processes. That is about 150 MB of extra memory, which should not be a big deal for most IoT devices (I guess).

We are using Kubernetes not just for managing a "huge" cluster but to have verifiable deployment across development and deployment. In our development environment, we downscale the cluster to 1. And in the production or staging environment, we could upscale the deployment if necessary.

This article will describe how to install a light weighted version of Kubernetes -- K3s in two nodes and with IPv6 enabled.



SIP 服务器的魔法


2022-11-19 11:46:28

[开发运维 | Dev Ops]

2022 年依然是很忙,不过还是将整个服务器迁移至了 Kubernetes , 云原生就是比较的方便,能够在不同的服务器之间轻松迁移。


2021-06-06 17:15:48

[开发运维 | Dev Ops]


2019-2020 年服务器维护计划与展望

2019-11-04 14:05:40

[网站记录 | Web Dev] ,


EECS3481 Lecture Notes - York University

I would like to share my notes for you guys.

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