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Added new post and update some misc
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I"û
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I"°
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##############################
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text_skin: default # "default" (default), "dark", "forest", "ocean", "chocolate", "orange"
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highlight_theme: default # "default" (default), "tomorrow", "tomorrow-night", "tomorrow-night-eighties", "tomorrow-night-blue", "tomorrow-night-bright"
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url : "https://blog.pengzhan.dev" # https://dev.pengzhan.dev
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url : "https://blog.pengzhan.dev" # "https://dev.pengzhan.dev"
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baseurl : ""
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fakebaseurl: "" # /proxy/4000
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title : STSD
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fakebaseurl: "" # "/proxy/4000"
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title : "STSD: A Pretended Tech Blog"
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description: > # this means to ignore newlines until "Language & timezone"
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My personal blog, with some boring research staff and some tricks I was fancy to.
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I'll try my best to make this blog fun and useful. Not just a place I complain about
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all happens in my Lab.
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My personal blog, some contents are useful, the others are not. Just like my mediocre life.
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## => Language and Timezone
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@@ -0,0 +1,30 @@
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---
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title: "Debug Kubelet"
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date: 2024-04-10 03:34:00 -0400
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tags: ["Kubernetes", "Kubelet", "Debug"]
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author: Pengzhan Hao
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cover: '/static/2024-04/Kubelet.webp'
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---
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## Debug logs
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Like all others program's debugging, the most straightforward way for newbies and the easiest way for advanced developer is relying on logs. Same to debug `kubelet`, bumping up verbosity to show more logs is the most intuitive approach when facing an issue. Like most component in Kubernetes, `kubelet` uses `klog` for logging and there are 10 verbosity levels(0-9).
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TL;DR: Bumping up to level 5 would satisfy most debugging needs.
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| Level | Meaning | Example |
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| ----- | ---------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- |
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| 0 | Always on (Warning, Error, Fatal) | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L757-L757 |
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| 1 | Default level logs when don't want any verbosity | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2527 |
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| 2 | Most important logs when major operations happen, also the default verbosity level | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L483-L483 |
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| 3 | Extended information | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2176 |
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| 4 | Debug level | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L1731 |
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| 5 | Trace level | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2821-L2821 |
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| 6 | Display requested resources | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/cm/cgroup_manager_linux.go#L401 |
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| 7 | Display HTTP request headers | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/logs/container_log_manager.go#L299 |
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| 8 | Display HTTP request payload | https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/prober/prober_manager.go#L192 |
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By the time, this note was written. In `kubelet` related code, level 8 was only used in `pkg/kubelet/prober/prober_manager.go` and level 7 was only used in `pkg/kubelet/logs/container_log_manager.go`. And there are 11 occurrences that level 6 was used, and all of them are not part of workload lifecycle related.
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## Further readings
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[Inotify watcher leaks in Kubelet]
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<!DOCTYPE html><html lang="en">
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<head><meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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||||
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"><title>Page Not Found - STSD</title>
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<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"><title>Page Not Found - STSD: A Pretended Tech Blog</title>
|
||||
|
||||
<meta name="description" content="My personal blog, with some boring research staff and some tricks I was fancy to. I'll try my best to make this blog fun and useful. Not just a place I complain about all happens in my Lab.
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||||
<meta name="description" content="My personal blog, some contents are useful, the others are not. Just like my mediocre life.
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">
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<link rel="canonical" href="https://blog.pengzhan.dev/404.html"><link rel="alternate" type="application/rss+xml" title="STSD" href="/feed.xml"><link rel="apple-touch-icon" sizes="180x180" href="/assets/apple-touch-icon.png">
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<link rel="canonical" href="https://blog.pengzhan.dev/404.html"><link rel="alternate" type="application/rss+xml" title="STSD: A Pretended Tech Blog" href="/feed.xml"><link rel="apple-touch-icon" sizes="180x180" href="/assets/apple-touch-icon.png">
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<link rel="icon" type="image/png" sizes="32x32" href="/assets/favicon-32x32.png">
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<link rel="icon" type="image/png" sizes="16x16" href="/assets/favicon-16x16.png">
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<link rel="manifest" href="/assets/site.webmanifest">
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@@ -407,8 +407,8 @@ c13 9 26 20 30 26 7 11 -9 26 -27 26 -5 0 -3 -5 5 -10 9 -6 10 -10 3 -10 -24
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-3 -12 5 -8 2 -9 -12 -3 -33 13 -88 15 -108 2z"/>
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</g>
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</svg>
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<a title="My personal blog, with some boring research staff and some tricks I was fancy to. I'll try my best to make this blog fun and useful. Not just a place I complain about all happens in my Lab.
|
||||
" href="/">STSD</a></div><button class="button button--secondary button--circle search-button js-search-toggle"><i class="fas fa-search"></i></button></div><nav class="navigation">
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||||
<a title="My personal blog, some contents are useful, the others are not. Just like my mediocre life.
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" href="/">STSD: A Pretended Tech Blog</a></div><button class="button button--secondary button--circle search-button js-search-toggle"><i class="fas fa-search"></i></button></div><nav class="navigation">
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<ul><li class="navigation__item"><a href="/archive.html">Archive</a></li><li class="navigation__item"><a href="https://pengzhan.dev">About</a></li><li><button class="button button--secondary button--circle search-button js-search-toggle"><i class="fas fa-search"></i></button></li></ul>
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</nav></div>
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</header>
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@@ -455,7 +455,7 @@ c13 9 26 20 30 26 7 11 -9 26 -27 26 -5 0 -3 -5 5 -10 9 -6 10 -10 3 -10 -24
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</div>
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</div>
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</div><div class="site-info mt-2">
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<div>© STSD 2021,
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<div>© STSD: A Pretended Tech Blog 2021,
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||||
Powered by <a title="Jekyll is a simple, blog-aware, static site generator." href="http://jekyllrb.com/">Jekyll</a> & <a
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||||
title="TeXt is a super customizable Jekyll theme." href="https://github.com/kitian616/jekyll-TeXt-theme">TeXt Theme</a>.
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</div>
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||||
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+19
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@@ -1,11 +1,11 @@
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<!DOCTYPE html><html lang="en">
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<head><meta charset="utf-8">
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||||
<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"><title>Archive - STSD</title>
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||||
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"><title>Archive - STSD: A Pretended Tech Blog</title>
|
||||
|
||||
<meta name="description" content="My personal blog, with some boring research staff and some tricks I was fancy to. I'll try my best to make this blog fun and useful. Not just a place I complain about all happens in my Lab.
|
||||
<meta name="description" content="My personal blog, some contents are useful, the others are not. Just like my mediocre life.
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||||
">
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||||
<link rel="canonical" href="https://blog.pengzhan.dev/archive"><link rel="alternate" type="application/rss+xml" title="STSD" href="/feed.xml"><link rel="apple-touch-icon" sizes="180x180" href="/assets/apple-touch-icon.png">
|
||||
<link rel="canonical" href="https://blog.pengzhan.dev/archive"><link rel="alternate" type="application/rss+xml" title="STSD: A Pretended Tech Blog" href="/feed.xml"><link rel="apple-touch-icon" sizes="180x180" href="/assets/apple-touch-icon.png">
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||||
<link rel="icon" type="image/png" sizes="32x32" href="/assets/favicon-32x32.png">
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||||
<link rel="icon" type="image/png" sizes="16x16" href="/assets/favicon-16x16.png">
|
||||
<link rel="manifest" href="/assets/site.webmanifest">
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||||
@@ -407,8 +407,8 @@ c13 9 26 20 30 26 7 11 -9 26 -27 26 -5 0 -3 -5 5 -10 9 -6 10 -10 3 -10 -24
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-3 -12 5 -8 2 -9 -12 -3 -33 13 -88 15 -108 2z"/>
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</g>
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||||
</svg>
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||||
<a title="My personal blog, with some boring research staff and some tricks I was fancy to. I'll try my best to make this blog fun and useful. Not just a place I complain about all happens in my Lab.
|
||||
" href="/">STSD</a></div><button class="button button--secondary button--circle search-button js-search-toggle"><i class="fas fa-search"></i></button></div><nav class="navigation">
|
||||
<a title="My personal blog, some contents are useful, the others are not. Just like my mediocre life.
|
||||
" href="/">STSD: A Pretended Tech Blog</a></div><button class="button button--secondary button--circle search-button js-search-toggle"><i class="fas fa-search"></i></button></div><nav class="navigation">
|
||||
<ul><li class="navigation__item"><a href="/archive.html">Archive</a></li><li class="navigation__item"><a href="https://pengzhan.dev">About</a></li><li><button class="button button--secondary button--circle search-button js-search-toggle"><i class="fas fa-search"></i></button></li></ul>
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||||
</nav></div>
|
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</header>
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||||
@@ -423,7 +423,7 @@ c13 9 26 20 30 26 7 11 -9 26 -27 26 -5 0 -3 -5 5 -10 9 -6 10 -10 3 -10 -24
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<ul class="menu">
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||||
<li>
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<button type="button" class="button button--secondary button--pill tag-button tag-button--all" data-encode="">
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Show All<div class="tag-button__count">8</div>
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Show All<div class="tag-button__count">9</div>
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</button>
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||||
</li><li><button type="button" class="button button--pill tag-button tag-button-1" data-encode="Binghamton+university">
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<span>Binghamton university</span><div class="tag-button__count">1</div>
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@@ -431,12 +431,21 @@ c13 9 26 20 30 26 7 11 -9 26 -27 26 -5 0 -3 -5 5 -10 9 -6 10 -10 3 -10 -24
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</li><li><button type="button" class="button button--pill tag-button tag-button-1" data-encode="Charles+proxy">
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<span>Charles proxy</span><div class="tag-button__count">1</div>
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</button>
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</li><li><button type="button" class="button button--pill tag-button tag-button-1" data-encode="Debug">
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<span>Debug</span><div class="tag-button__count">1</div>
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</button>
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||||
</li><li><button type="button" class="button button--pill tag-button tag-button-1" data-encode="Diary">
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||||
<span>Diary</span><div class="tag-button__count">1</div>
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||||
</button>
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||||
</li><li><button type="button" class="button button--pill tag-button tag-button-2" data-encode="Edge+computing">
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||||
<span>Edge computing</span><div class="tag-button__count">2</div>
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</button>
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||||
</li><li><button type="button" class="button button--pill tag-button tag-button-1" data-encode="Kubelet">
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<span>Kubelet</span><div class="tag-button__count">1</div>
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</button>
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</li><li><button type="button" class="button button--pill tag-button tag-button-1" data-encode="Kubernetes">
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<span>Kubernetes</span><div class="tag-button__count">1</div>
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</button>
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||||
</li><li><button type="button" class="button button--pill tag-button tag-button-1" data-encode="Log">
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<span>Log</span><div class="tag-button__count">1</div>
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||||
</button>
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||||
@@ -463,7 +472,9 @@ c13 9 26 20 30 26 7 11 -9 26 -27 26 -5 0 -3 -5 5 -10 9 -6 10 -10 3 -10 -24
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</button>
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||||
</li></ul>
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||||
</div>
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||||
<div class="js-result layout--archive__result d-none"><div class="article-list items"><section><h2 class="article-list__group-header">2022</h2><ul class="items"><li class="item" itemscope itemtype="http://schema.org/BlogPosting" data-tags="Xv6,Teaching,Operating+system,Binghamton+university">
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<div class="js-result layout--archive__result d-none"><div class="article-list items"><section><h2 class="article-list__group-header">2024</h2><ul class="items"><li class="item" itemscope itemtype="http://schema.org/BlogPosting" data-tags="Kubernetes,Kubelet,Debug">
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<div class="item__content"><span class="item__meta">Apr 10</span><a itemprop="headline" class="item__header" href="/posts/Debug-kubelet">Debug Kubelet</a></div>
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</li></ul></section><section><h2 class="article-list__group-header">2022</h2><ul class="items"><li class="item" itemscope itemtype="http://schema.org/BlogPosting" data-tags="Xv6,Teaching,Operating+system,Binghamton+university">
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<div class="item__content"><span class="item__meta">Feb 22</span><a itemprop="headline" class="item__header" href="/posts/cs350-labs">Labs of CS350</a></div>
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</li></ul></section><section><h2 class="article-list__group-header">2021</h2><ul class="items"><li class="item" itemscope itemtype="http://schema.org/BlogPosting" data-tags="Research,Edge+computing">
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<div class="item__content"><span class="item__meta">Oct 31</span><a itemprop="headline" class="item__header" href="/posts/eddl-how-do-we-train-on-limited-edge-devices-part2">EDDL: How do we train neural networks on limited edge devices - PART 2</a></div>
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||||
</div>
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||||
</div>
|
||||
</div><div class="site-info mt-2">
|
||||
<div>© STSD 2021,
|
||||
<div>© STSD: A Pretended Tech Blog 2021,
|
||||
Powered by <a title="Jekyll is a simple, blog-aware, static site generator." href="http://jekyllrb.com/">Jekyll</a> & <a
|
||||
title="TeXt is a super customizable Jekyll theme." href="https://github.com/kitian616/jekyll-TeXt-theme">TeXt Theme</a>.
|
||||
</div>
|
||||
|
||||
@@ -1 +1 @@
|
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|
||||
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@@ -1,5 +1,71 @@
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<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en"><generator uri="https://jekyllrb.com/" version="4.2.2">Jekyll</generator><link href="https://blog.pengzhan.dev/feed.xml" rel="self" type="application/atom+xml" /><link href="https://blog.pengzhan.dev/" rel="alternate" type="text/html" hreflang="en" /><updated>2024-04-03T18:56:54-04:00</updated><id>https://blog.pengzhan.dev/feed.xml</id><title type="html">STSD</title><subtitle>My personal blog, with some boring research staff and some tricks I was fancy to. I'll try my best to make this blog fun and useful. Not just a place I complain about all happens in my Lab.
|
||||
</subtitle><author><name>Pengzhan Hao</name><email>haopengzhan@gmail.com</email></author><entry><title type="html">Labs of CS350</title><link href="https://blog.pengzhan.dev/posts/cs350-labs" rel="alternate" type="text/html" title="Labs of CS350" /><published>2022-02-22T16:08:17-05:00</published><updated>2022-02-22T16:08:17-05:00</updated><id>https://blog.pengzhan.dev/posts/cs350-labs</id><content type="html" xml:base="https://blog.pengzhan.dev/posts/cs350-labs"><![CDATA[<p>This will be a series regarding lab I gave during the spring 2022 semester.</p>
|
||||
<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en"><generator uri="https://jekyllrb.com/" version="4.2.2">Jekyll</generator><link href="https://blog.pengzhan.dev/feed.xml" rel="self" type="application/atom+xml" /><link href="https://blog.pengzhan.dev/" rel="alternate" type="text/html" hreflang="en" /><updated>2024-04-10T23:50:57-04:00</updated><id>https://blog.pengzhan.dev/feed.xml</id><title type="html">STSD: A Pretended Tech Blog</title><subtitle>My personal blog, some contents are useful, the others are not. Just like my mediocre life.
|
||||
</subtitle><author><name>Pengzhan Hao</name><email>haopengzhan@gmail.com</email></author><entry><title type="html">Debug Kubelet</title><link href="https://blog.pengzhan.dev/posts/Debug-kubelet" rel="alternate" type="text/html" title="Debug Kubelet" /><published>2024-04-10T03:34:00-04:00</published><updated>2024-04-10T03:34:00-04:00</updated><id>https://blog.pengzhan.dev/posts/Debug-kubelet</id><content type="html" xml:base="https://blog.pengzhan.dev/posts/Debug-kubelet"><![CDATA[<h2 id="debug-logs">Debug logs</h2>
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||||
|
||||
<p>Like all others program’s debugging, the most straightforward way for newbies and the easiest way for advanced developer is relying on logs. Same to debug <code class="language-plaintext highlighter-rouge">kubelet</code>, bumping up verbosity to show more logs is the most intuitive approach when facing an issue. Like most component in Kubernetes, <code class="language-plaintext highlighter-rouge">kubelet</code> uses <code class="language-plaintext highlighter-rouge">klog</code> for logging and there are 10 verbosity levels(0-9).</p>
|
||||
|
||||
<p>TL;DR: Bumping up to level 5 would satisfy most debugging needs.</p>
|
||||
|
||||
<table>
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<thead>
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<tr>
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<th>Level</th>
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<th>Meaning</th>
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<th>Example</th>
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||||
</tr>
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||||
</thead>
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||||
<tbody>
|
||||
<tr>
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||||
<td>0</td>
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||||
<td>Always on (Warning, Error, Fatal)</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L757-L757</td>
|
||||
</tr>
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<tr>
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||||
<td>1</td>
|
||||
<td>Default level logs when don’t want any verbosity</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2527</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>2</td>
|
||||
<td>Most important logs when major operations happen, also the default verbosity level</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L483-L483</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>3</td>
|
||||
<td>Extended information</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2176</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>4</td>
|
||||
<td>Debug level</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L1731</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>5</td>
|
||||
<td>Trace level</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2821-L2821</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>6</td>
|
||||
<td>Display requested resources</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/cm/cgroup_manager_linux.go#L401</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>7</td>
|
||||
<td>Display HTTP request headers</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/logs/container_log_manager.go#L299</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td>8</td>
|
||||
<td>Display HTTP request payload</td>
|
||||
<td>https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/prober/prober_manager.go#L192</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
|
||||
<p>By the time, this note was written. In <code class="language-plaintext highlighter-rouge">kubelet</code> related code, level 8 was only used in <code class="language-plaintext highlighter-rouge">pkg/kubelet/prober/prober_manager.go</code> and level 7 was only used in <code class="language-plaintext highlighter-rouge">pkg/kubelet/logs/container_log_manager.go</code>. And there are 11 occurrences that level 6 was used, and all of them are not part of workload lifecycle related.</p>
|
||||
|
||||
<h2 id="further-readings">Further readings</h2>
|
||||
<p>[Inotify watcher leaks in Kubelet]</p>]]></content><author><name>Pengzhan Hao</name></author><category term="Kubernetes" /><category term="Kubelet" /><category term="Debug" /><summary type="html"><![CDATA[Debug logs Like all others program’s debugging, the most straightforward way for newbies and the easiest way for advanced developer is relying on logs. Same to debug kubelet, bumping up verbosity to show more logs is the most intuitive approach when facing an issue. Like most component in Kubernetes, kubelet uses klog for logging and there are 10 verbosity levels(0-9). TL;DR: Bumping up to level 5 would satisfy most debugging needs. Level Meaning Example 0 Always on (Warning, Error, Fatal) https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L757-L757 1 Default level logs when don’t want any verbosity https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2527 2 Most important logs when major operations happen, also the default verbosity level https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L483-L483 3 Extended information https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2176 4 Debug level https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L1731 5 Trace level https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/kubelet.go#L2821-L2821 6 Display requested resources https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/cm/cgroup_manager_linux.go#L401 7 Display HTTP request headers https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/logs/container_log_manager.go#L299 8 Display HTTP request payload https://github.com/kubernetes/kubernetes/blob/d9c54f69d4bb7ae1bb655e1a2a50297d615025b5/pkg/kubelet/prober/prober_manager.go#L192 By the time, this note was written. In kubelet related code, level 8 was only used in pkg/kubelet/prober/prober_manager.go and level 7 was only used in pkg/kubelet/logs/container_log_manager.go. And there are 11 occurrences that level 6 was used, and all of them are not part of workload lifecycle related. Further readings [Inotify watcher leaks in Kubelet]]]></summary></entry><entry><title type="html">Labs of CS350</title><link href="https://blog.pengzhan.dev/posts/cs350-labs" rel="alternate" type="text/html" title="Labs of CS350" /><published>2022-02-22T16:08:17-05:00</published><updated>2022-02-22T16:08:17-05:00</updated><id>https://blog.pengzhan.dev/posts/cs350-labs</id><content type="html" xml:base="https://blog.pengzhan.dev/posts/cs350-labs"><
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