https://blog.margrop.net/en/tag/alibaba-cloud/ Recent content in Alibaba Cloud on Margrop Blog Hugo en-US Thu, 09 Jul 2026 21:40:00 +0800 https://blog.margrop.net/en/post/aliyun-slb-alb-nlb-clb-explained/ Thu, 09 Jul 2026 21:40:00 +0800 https://blog.margrop.net/en/post/aliyun-slb-alb-nlb-clb-explained/ <blockquote> <p><strong>Short version</strong></p> <p>On Alibaba Cloud, do not treat <code>SLB</code> as one single instance type anymore. The more accurate mental model is this: <strong>SLB is the Server Load Balancer product family, and the concrete choices are mainly ALB, NLB, and CLB.</strong></p> <ul> <li><strong>ALB</strong> is the Application Load Balancer for Layer 7 traffic such as HTTP, HTTPS, QUIC, gRPC, and SSE. If you need routing by domain, path, header, cookie, method, or query string, start here.</li> <li><strong>NLB</strong> is the Network Load Balancer for Layer 4 traffic such as TCP, UDP, and TCPSSL. If you need massive connections, low latency, long-lived sessions, IoT, audio/video, or a message-service entry point, start here.</li> <li><strong>CLB</strong> is the Classic Load Balancer. It supports TCP, UDP, HTTP, and HTTPS, with solid Layer 4 capability and basic Layer 7 features. It is still useful for existing systems, but new designs should usually evaluate ALB or NLB first.</li> </ul> <p>A simple analogy: <strong>ALB is a receptionist who understands business rules, NLB is a high-speed toll gate, CLB is an older all-in-one service counter, and SLB is the name of the whole building.</strong></p> </blockquote> https://blog.margrop.net/en/post/ubuntu-26-apt-source-mirror-setup-guide/ Tue, 26 May 2026 21:00:00 +0800 https://blog.margrop.net/en/post/ubuntu-26-apt-source-mirror-setup-guide/ <blockquote> <p><strong>TL;DR</strong></p> <p>Ubuntu 26.04 LTS (Resolute Raccoon) has officially been released. If you have just installed it, the very first thing you should do is replace the default APT sources with fast domestic mirror servers (such as Alibaba Cloud or Huawei Cloud). Note that starting from Ubuntu 24.04, the system has transitioned entirely to the new <strong>DEB822</strong> format for APT source configurations (stored in <code>/etc/apt/sources.list.d/ubuntu.sources</code>), making the traditional <code>/etc/apt/sources.list</code> inactive by default.</p> <p>This tutorial provides a step-by-step guide on how to safely change to Alibaba Cloud and Huawei Cloud mirrors in Ubuntu 26.04 LTS, along with deep troubleshooting analysis for potential pitfalls like dependency conflicts and version codename mismatches.</p> </blockquote>