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<html lang="zh"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"><meta><title>开心BOY</title><link rel="manifest" href="/manifest.json"><meta name="application-name" content="开心BOY"><meta name="msapplication-TileImage" content="/img/favicon.svg"><meta name="apple-mobile-web-app-capable" content="yes"><meta name="apple-mobile-web-app-title" content="开心BOY"><meta name="apple-mobile-web-app-status-bar-style" content="default"><meta property="og:type" content="blog"><meta property="og:title" content="开心BOY"><meta property="og:url" content="https://hackerain.me/"><meta property="og:site_name" content="开心BOY"><meta property="og:locale" content="zh_CN"><meta property="og:image" content="https://hackerain.me/img/og_image.png"><meta property="article:author" content="hackerain"><meta property="twitter:card" content="summary"><meta property="twitter:image:src" content="https://hackerain.me/img/og_image.png"><script type="application/ld+json">{"@context":"https://schema.org","@type":"BlogPosting","mainEntityOfPage":{"@type":"WebPage","@id":"https://hackerain.me"},"headline":"开心BOY","image":["https://hackerain.me/img/og_image.png"],"author":{"@type":"Person","name":"hackerain"},"publisher":{"@type":"Organization","name":"开心BOY","logo":{"@type":"ImageObject","url":"https://hackerain.me/assets/logo.jpg"}},"description":null}</script><link rel="icon" href="/img/favicon.svg"><link rel="stylesheet" href="https://use.fontawesome.com/releases/v6.0.0/css/all.css"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/highlight.js@11.7.0/styles/atom-one-light.css"><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Ubuntu:wght@400;600&family=Source+Code+Pro"><link rel="stylesheet" href="/css/default.css"><style>body>.footer,body>.navbar,body>.section{opacity:0}</style><!--!--><!--!--><!--!--><!--!--><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/cookieconsent@3.1.1/build/cookieconsent.min.css"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/lightgallery@1.10.0/dist/css/lightgallery.min.css"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/justifiedGallery@3.8.1/dist/css/justifiedGallery.min.css"><!--!--><!--!--><style>.pace{-webkit-pointer-events:none;pointer-events:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.pace-inactive{display:none}.pace .pace-progress{background:#3273dc;position:fixed;z-index:2000;top:0;right:100%;width:100%;height:2px}</style><script src="https://cdn.jsdelivr.net/npm/pace-js@1.2.4/pace.min.js"></script><!--!--><!--!--><!-- hexo injector head_end start --><script>
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</head><body class="is-3-column"><nav class="navbar navbar-main"><div class="container navbar-container"><div class="navbar-brand justify-content-center"><a class="navbar-item navbar-logo" href="/"><img src="/assets/logo.jpg" alt="开心BOY" height="28"></a></div><div class="navbar-menu"><div class="navbar-start"><a class="navbar-item is-active" href="/">Home</a><a class="navbar-item" href="/archives">Archives</a><a class="navbar-item" href="/categories">Categories</a><a class="navbar-item" href="/tags">Tags</a><a class="navbar-item" href="/about">About</a></div><div class="navbar-end"><a class="navbar-item search" title="搜索" href="javascript:;"><i class="fas fa-search"></i></a></div></div></div></nav><section class="section"><div class="container"><div class="columns"><div class="column order-2 column-main is-8-tablet is-8-desktop is-6-widescreen"><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2023-11-18T00:00:00.000Z" title="11/18/2023, 12:00:00 AM">2023-11-18</time>发表</span><span class="level-item"><time dateTime="2024-02-23T02:18:46.881Z" title="2/23/2024, 2:18:46 AM">2024-02-23</time>更新</span><span class="level-item">38 分钟读完 (大约5692个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2023/11/18/kubernetes/kube-controller-runtime.html">Kubernetes controller-runtime 介绍</a></p><div class="content"><p>我们在做CRD开发时，除了要写CRD定义之外，最重要的是实现CRD对应的Controller，这样CRD才能真正有用，而不论什么CRD，它的Controller的逻辑框架是大致一样的，主要就是监听CRD资源的变化事件，然后触发Reconcile逻辑去执行对应的动作，确保实际状态跟CRD的定义状态保持一致，此外，还有一些其他通用功能，比如监控、选主、Wehbook等，这种开发范式现在称之为<code>Operator</code>，在万物皆可CRD的云原生时代，这种通用需求早已被剥离出来，成为单独的第三方库，即<a target="_blank" rel="noopener" href="https://github.com/kubernetes-sigs/controller-runtime">controller-runtime</a>，而<a target="_blank" rel="noopener" href="https://github.com/operator-framework/operator-sdk">operator-sdk</a>也封装的是 <code>controller-runtime</code>，方便进行operator的开发，可见其重要性，本篇文章就对 <code>controller-runtime</code> 的概念、原理以及核心逻辑进行下介绍。</p></div><a class="article-more button is-small is-size-7" href="/2023/11/18/kubernetes/kube-controller-runtime.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2023-11-12T00:00:00.000Z" title="11/12/2023, 12:00:00 AM">2023-11-12</time>发表</span><span class="level-item"><time dateTime="2023-11-12T11:00:19.131Z" title="11/12/2023, 11:00:19 AM">2023-11-12</time>更新</span><span class="level-item">32 分钟读完 (大约4802个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2023/11/12/kubernetes/kube-versioning-codec.html">Kubernetes API Codec 解析</a></p><div class="content"><h2 id="概述"><a href="#概述" class="headerlink" title="概述"></a>概述</h2><p>在 <a target="_blank" rel="noopener" href="https://hackerain.github.io/2023/10/28/kubernetes/kube-versioning.html">Kubernetes API 多版本和序列化</a> 这篇文章中，介绍了API多版本的功能和实现原理，其中Codec就是用来做序列化工作的，它主要用在两个地方：一个是通过HTTP协议跟客户端进行交互时，会对传输的数据进行序列化和反序列化，将字节流类型的数据转换成对应的API对象，或者是将API对象转换成对应格式的数据返回给客户端；一个是用在存储层的，即API对象存储到数据库时，也需要经过编码的，即经过序列化，默认是存储成 protobuf格式的数据，然后从数据库读出来数据时，又会反序列化为对应的API对象，下面我们来分析下Codec的实现机制。</p></div><a class="article-more button is-small is-size-7" href="/2023/11/12/kubernetes/kube-versioning-codec.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2023-11-11T00:00:00.000Z" title="11/11/2023, 12:00:00 AM">2023-11-11</time>发表</span><span class="level-item"><time dateTime="2024-02-23T05:17:27.350Z" title="2/23/2024, 5:17:27 AM">2024-02-23</time>更新</span><span class="level-item">44 分钟读完 (大约6625个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2023/11/11/kubernetes/kube-versioning-scheme.html">Kubernetes API Scheme 解析</a></p><div class="content"><h2 id="概述"><a href="#概述" class="headerlink" title="概述"></a>概述</h2><p>在 <a target="_blank" rel="noopener" href="https://hackerain.github.io/2023/10/28/kubernetes/kube-versioning.html">Kubernetes API 多版本和序列化</a> 这篇文章中，介绍了API多版本的功能和实现原理，其中Scheme就是其实现原理的一项重要机制，在平时的开发中也经常会遇到，本篇文章就对其进行下分析。</p>
<p>Scheme起到了一个类型（Type）注册中心的作用，在API Server内部，全局只有一个Scheme实例，各个版本的API资源，会将他们的类型，注册到Scheme中来，同时，也会将如何进行类型转换的方法注册到Scheme中来，后续在Handler中进行版本转换以及序列化时，则会使用Scheme中注册的类型创建对应版本的对象，以及使用注册的类型转换的方法对不同版本的对象进行转换。</p></div><a class="article-more button is-small is-size-7" href="/2023/11/11/kubernetes/kube-versioning-scheme.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2023-10-28T00:00:00.000Z" title="10/28/2023, 12:00:00 AM">2023-10-28</time>发表</span><span class="level-item"><time dateTime="2023-11-12T11:36:49.181Z" title="11/12/2023, 11:36:49 AM">2023-11-12</time>更新</span><span class="level-item">34 分钟读完 (大约5137个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2023/10/28/kubernetes/kube-versioning.html">Kubernetes API 多版本和序列化</a></p><div class="content"><h2 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h2><p>三年前在分析Kubernete APIServer时，就经常遇到两个东西，一个是Scheme，一个是Codec，当时对它们并不是很理解，也没有去细究，但是后来越来越多的能够遇见它们，尤其是在做Kubernetes API相关的开发时，Scheme的出镜率很高，于是查了下资料才知道，原来他们跟Kubernetes的API多版本和序列化有关，而API多版本又属于Kubernetes API的重要特性，它跟一般应用的多版本API还不太一样，有它自己的特色，因此搞懂它的相关概念和实现原理是相当有必要的。从前面介绍apiserver的系列文章上也可以看到，因为Kubernetes要处理很多种资源，可以说是包罗万象，所以它做了很多的抽象，而API多版本则是在这些抽象之上再度抽象的艺术，因此还是比较难以理解的，但是这些设计都是随着时间的推移逐渐演进出来的，有它的合理性，甚至当理解了它的机制之后，会发现它的设计之美，仿佛是一件艺术品。毕加索说，艺术是揭示真理的谎言，就让我们拨开API多版本的层层迷雾，去探寻下它的本质。</p></div><a class="article-more button is-small is-size-7" href="/2023/10/28/kubernetes/kube-versioning.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2022-09-26T00:00:00.000Z" title="9/26/2022, 12:00:00 AM">2022-09-26</time>发表</span><span class="level-item"><time dateTime="2023-03-11T15:45:44.734Z" title="3/11/2023, 3:45:44 PM">2023-03-11</time>更新</span><span class="level-item">14 分钟读完 (大约2130个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2022/09/26/elasticsearch/elasticsearch_large_text_field.html">Elasticsearch大文本字段(large text field)优化方案</a></p><div class="content"><h2 id="背景"><a href="#背景" class="headerlink" title="背景"></a>背景</h2><p>在全文检索的场景下，经常会有text类型的字段存储的数据量比较大，比如一个pdf文档或者是一本书的内容，可能会有几兆，几十兆，上百兆的大小，单个字段的内容过大，会对集群性能以及稳定性造成比较大的影响，因此本文档针对该场景给出优化建议。</p></div><a class="article-more button is-small is-size-7" href="/2022/09/26/elasticsearch/elasticsearch_large_text_field.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2022-08-07T10:52:55.000Z" title="8/7/2022, 10:52:55 AM">2022-08-07</time>发表</span><span class="level-item"><time dateTime="2023-03-11T15:45:44.747Z" title="3/11/2023, 3:45:44 PM">2023-03-11</time>更新</span><span class="level-item">1 小时读完 (大约7033个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2022/08/07/umi/umi.html">UMI框架解析</a></p><div class="content"><h2 id="背景"><a href="#背景" class="headerlink" title="背景"></a>背景</h2><p>最近打算自己写一个运维管理平台，给我们内部使用，对于一个运维+后端程序员来说，写前端无疑是最大的挑战了，前端的知识栈真是庞大又杂乱，只掌握了最基础的html+css+js来说是远远不够的，前端发展了这么几十年，每一个领域都有一大堆的标准、组件、框架，比如css有less、sass等扩展，js领域又有react, vue等框架，还有typescript这种带类型的js，光ts的语法就可以复杂到令人发指，此外，还有很多现成的ui库，像阿里的antd，国外的mui，本以为react就已经是学习的终点了，但是还有umi这种基于react的前端框架，这还没完，还有再上一层的基于umi的antd pro框架，一层接一层，而且很多公司还在热衷于创造新的框架，这些各个方面各个维度的框架组件，多到让新踏入这个领域的小白无所适从。然而虽然学习成本增加了，但是这种越来越上层的框架组件，是无数前辈大佬的经验总结，能够让前端开发变得快速高效标准，尤其是对我这种小白来说，遵循这些优秀的框架标准，就可以继承这些经验，少走很多弯路，专注于做业务逻辑的开发。</p></div><a class="article-more button is-small is-size-7" href="/2022/08/07/umi/umi.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2021-11-19T22:12:55.000Z" title="11/19/2021, 10:12:55 PM">2021-11-19</time>发表</span><span class="level-item"><time dateTime="2023-03-11T15:45:44.744Z" title="3/11/2023, 3:45:44 PM">2023-03-11</time>更新</span><span class="level-item">31 分钟读完 (大约4633个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2021/11/19/openstack/openstack_uvw_highlight.html">OpenStack Ussuri-Victoria-Wallaby版本新功能介绍</a></p><div class="content"><h2 id="社区目标"><a href="#社区目标" class="headerlink" title="社区目标"></a>社区目标</h2><p>每个Release，社区都会定义几个社区目标，期望所有项目能够实现，这有利于对OpenStack下众多的项目能够有统一整体性，而不是各自发展各自的。OpenStack 从Ussuir到Victoria到Wallaby版本，社区定义了如下几个社区目标：</p>
<ul>
<li><a target="_blank" rel="noopener" href="https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html">Drop Python 2.7 Support</a></li>
<li><a target="_blank" rel="noopener" href="https://governance.openstack.org/tc/goals/selected/wallaby/migrate-policy-format-from-json-to-yaml.html">Migrate RBAC Policy Format from JSON to YAML</a></li>
<li><a target="_blank" rel="noopener" href="https://governance.openstack.org/tc/goals/selected/wallaby/migrate-to-privsep.html">Migrate from oslo.rootwrap to oslo.privsep</a></li>
</ul></div><a class="article-more button is-small is-size-7" href="/2021/11/19/openstack/openstack_uvw_highlight.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2021-11-19T22:03:55.000Z" title="11/19/2021, 10:03:55 PM">2021-11-19</time>发表</span><span class="level-item"><time dateTime="2023-03-11T15:45:44.743Z" title="3/11/2023, 3:45:44 PM">2023-03-11</time>更新</span><span class="level-item">37 分钟读完 (大约5497个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2021/11/19/openstack/openstack_rst_highlight.html">OpenStack Stein-Train版本新功能介绍</a></p><div class="content"><h2 id="社区目标"><a href="#社区目标" class="headerlink" title="社区目标"></a>社区目标</h2><p>每个Release，社区都会定义几个社区目标，期望所有项目能够实现，这有利于对OpenStack下众多的项目能够有统一整体性，而不是各自发展各自的。OpenStack Stein到Train版本，社区定义了如下几个社区目标：</p></div><a class="article-more button is-small is-size-7" href="/2021/11/19/openstack/openstack_rst_highlight.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2021-10-16T00:00:00.000Z" title="10/16/2021, 12:00:00 AM">2021-10-16</time>发表</span><span class="level-item"><time dateTime="2023-10-26T16:17:25.300Z" title="10/26/2023, 4:17:25 PM">2023-10-26</time>更新</span><span class="level-item">44 分钟读完 (大约6571个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2021/10/16/kubernetes/kube-kubelet-csi.html">Kubernetes Kubelet CSI 机制解析</a></p><div class="content"><p>在CSI之前，Kubernetes本身就内置了很多插件去对接第三方存储，如果内置插件不满足需求，还可以通过FlexVolume机制，去编写自己的存储插件，然后被动态的加载到Kubernetes中，也就是说Kubernetes并不存在像对接容器运行时那种代码侵入性不好维护的问题，那为什么还要再制定一套CSI机制去对接第三方存储呢？其实CSI是一个更通用的存储对接方案，它不仅仅是针对Kubernetes的，而是针对所有的容器编排系统，比如Mesos也支持CSI，而且CSI是通过RPC机制进行交互的，跟语言无关，这样就给存储厂商带来极大的便利，写一次CSI插件，就可以适配到各种容器编排系统，不用为每种容器编排系统单独开发存储插件，这在CSI协议的目标中做了清晰的描述：</p></div><a class="article-more button is-small is-size-7" href="/2021/10/16/kubernetes/kube-kubelet-csi.html#more">阅读更多</a></article></div><div class="card"><article class="card-content article" role="article"><div class="article-meta is-size-7 is-uppercase level is-mobile"><div class="level-left"><span class="level-item"><time dateTime="2021-09-20T00:00:00.000Z" title="9/20/2021, 12:00:00 AM">2021-09-20</time>发表</span><span class="level-item"><time dateTime="2023-10-26T16:17:25.298Z" title="10/26/2023, 4:17:25 PM">2023-10-26</time>更新</span><span class="level-item">20 分钟读完 (大约2971个字)</span></div></div><p class="title is-3 is-size-4-mobile"><a class="link-muted" href="/2021/09/20/kubernetes/kube-kubelet-cni.html">Kubernetes Kubelet CNI 机制解析</a></p><div class="content"><h2 id="CNI简介"><a href="#CNI简介" class="headerlink" title="CNI简介"></a>CNI简介</h2><p>这里说Kubelet CNI，其实说法有些不准确，在<a target="_blank" rel="noopener" href="https://hackerain.github.io/2021/08/15/kubernetes/kube-kubelet-overview.html">Kubernetes Kubelet机制概述</a>中就介绍过，Kubelet并没有直接跟CNI交互，而是通过容器运行时跟外部网络进行交互的，换句话说，CNI解决的是容器网络插件化的问题，跟Kubernetes这种容器编排系统并没有直接关系，但是有很多文章都说Kubelet支持了CNI，包括Kubernets官方的文档<a target="_blank" rel="noopener" href="https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/">Network Plugins</a>，其实这里是特指的Docker，因为Docker本身并不支持CNI，kubelet将对Docker网络环境的创建和删除，通过CNI的方式，放在了dockershim中，如果Kubernetes移除了对Docker的支持，就会移除dockershim，那么kubelet对CNI的支持也就会移除，这样两者就完全没有关系了。</p></div><a class="article-more button is-small is-size-7" href="/2021/09/20/kubernetes/kube-kubelet-cni.html#more">阅读更多</a></article></div><nav 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