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<a href="/2020/03/21/docker%E6%AF%94%E4%B8%80%E8%88%AC%E5%A4%9A%E4%B8%80%E7%82%B9%E7%9A%84%E5%88%9D%E5%AD%A6%E8%80%85%E4%BB%8B%E7%BB%8D%E4%B8%89/" class="post-title-link" itemprop="url">docker比一般多一点的初学者介绍三</a>
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<time title="Created: 2020-03-21 14:43:39 / Modified: 16:19:01" itemprop="dateCreated datePublished" datetime="2020-03-21T14:43:39+08:00">2020-03-21</time>
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,
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<a href="/categories/Docker/%E4%BB%8B%E7%BB%8D/" itemprop="url" rel="index"><span itemprop="name">介绍</span></a>
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<span id="/2020/03/21/docker%E6%AF%94%E4%B8%80%E8%88%AC%E5%A4%9A%E4%B8%80%E7%82%B9%E7%9A%84%E5%88%9D%E5%AD%A6%E8%80%85%E4%BB%8B%E7%BB%8D%E4%B8%89/" class="post-meta-item leancloud_visitors" data-flag-title="docker比一般多一点的初学者介绍三" title="Views">
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<a title="disqus" href="/2020/03/21/docker%E6%AF%94%E4%B8%80%E8%88%AC%E5%A4%9A%E4%B8%80%E7%82%B9%E7%9A%84%E5%88%9D%E5%AD%A6%E8%80%85%E4%BB%8B%E7%BB%8D%E4%B8%89/#disqus_thread" itemprop="discussionUrl">
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<h2 id="运行第一个-Dockerfile"><a href="#运行第一个-Dockerfile" class="headerlink" title="运行第一个 Dockerfile"></a>运行第一个 Dockerfile</h2><p>上一篇的 Dockerfile 我们停留在构建阶段，现在来把它跑起来</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">docker run -d -p 80 --name static_web nicksxs/static_web \</span><br><span class="line">nginx -g "daemon off;"</span><br></pre></td></tr></table></figure>
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<p>这里的<code>-d</code>表示以分离模型运行docker (detached),然后-p 是表示将容器的 80 端口开放给宿主机，然后容器名就叫 static_web,使用了我们上次构建的 static_web 镜像，后面的是让 nginx 在前台运行<br><img data-src="https://i.loli.net/2020/03/21/VCEuf5BTopXNkcA.png" alt=""><br>可以看到返回了个容器 id，但是具体情况没出现，也没连上去，那我们想看看怎么访问在 Dockerfile 里写的静态页面，我们来看下docker 进程<br><img data-src="https://i.loli.net/2020/03/21/Cx1JYGBrHRqojpz.png" alt=""><br>发现为我们随机分配了一个宿主机的端口，32768，去服务器的防火墙把这个外网端口开一下，看看是不是符合我们的预期呢<br><img data-src="https://i.loli.net/2020/03/21/xhAcQlX5iP9KnYB.png" alt=""><br>好像不太对额，应该是 ubuntu 安装的 nginx 的默认工作目录不对，我们来进容器看看，再熟悉下命令<code>docker exec -it 4792455ca2ed /bin/bash</code><br>记得容器 id 换成自己的，进入容器后得找找 nginx 的配置文件，通常在<code>/etc/nginx</code>,<code>/usr/local/etc</code>等目录下，然后找到我们的目录是在这<br><img data-src="https://i.loli.net/2020/03/21/wE8TfkbC2d9pNuv.png" alt=""><br>所以把刚才的内容复制过去再试试<br><img data-src="https://i.loli.net/2020/03/21/qNkpHn3GW8aiwIr.png" alt=""><br>目标达成，give me five✌️</p>
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<h2 id="第二个-Dockerfile"><a href="#第二个-Dockerfile" class="headerlink" title="第二个 Dockerfile"></a>第二个 Dockerfile</h2><p>然后就想来动态一点的，毕竟写过 PHP，就来试试 PHP<br>再建一个目录叫 dynamic_web，里面创建 src 目录，放一个 index.php<br>内容是</p>
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<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta"><?php</span></span><br><span class="line"><span class="keyword">echo</span> <span class="string">"Hello World!"</span>;</span><br></pre></td></tr></table></figure>
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<p>然后在 dynamic_web 目录下创建 Dockerfile，</p>
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<figure class="highlight dockerfile"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">FROM</span> trafex/alpine-nginx-php7:latest</span><br><span class="line"><span class="keyword">COPY</span><span class="bash"> src/ /var/www/html</span></span><br><span class="line"><span class="keyword">EXPOSE</span> <span class="number">80</span></span><br></pre></td></tr></table></figure>
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<p>Dockerfile 虽然只有三行，不过要着重说明下，这个底包其实不是docker 官方的，有两点考虑，一点是官方的基本都是 php apache 的镜像，还有就是 alpine这个，截取一段中文介绍</p>
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<blockquote>
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<p>Alpine 操作系统是一个面向安全的轻型 Linux 发行版。它不同于通常 Linux 发行版，Alpine 采用了 musl libc 和 busybox 以减小系统的体积和运行时资源消耗，但功能上比 busybox 又完善的多，因此得到开源社区越来越多的青睐。在保持瘦身的同时，Alpine 还提供了自己的包管理工具 apk，可以通过 <a href="https://pkgs.alpinelinux.org/packages" target="_blank" rel="noopener">https://pkgs.alpinelinux.org/packages</a> 网站上查询包信息，也可以直接通过 apk 命令直接查询和安装各种软件。<br>Alpine 由非商业组织维护的，支持广泛场景的 Linux发行版，它特别为资深/重度Linux用户而优化，关注安全，性能和资源效能。Alpine 镜像可以适用于更多常用场景，并且是一个优秀的可以适用于生产的基础系统/环境。</p>
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</blockquote>
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<blockquote>
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<p>Alpine Docker 镜像也继承了 Alpine Linux 发行版的这些优势。相比于其他 Docker 镜像，它的容量非常小，仅仅只有 5 MB 左右（对比 Ubuntu 系列镜像接近 200 MB），且拥有非常友好的包管理机制。官方镜像来自 docker-alpine 项目。</p>
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</blockquote>
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<p>目前 Docker 官方已开始推荐使用 Alpine 替代之前的 Ubuntu 做为基础镜像环境。这样会带来多个好处。包括镜像下载速度加快，镜像安全性提高，主机之间的切换更方便，占用更少磁盘空间等。 </p>
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<p>一方面在没有镜像的情况下，拉取 docker 镜像还是比较费力的，第二个就是也能节省硬盘空间，所以目前有大部分的 docker 镜像都将 alpine 作为基础镜像了<br>然后再来构建下<br><img data-src="https://i.loli.net/2020/03/21/56cuKf1ObvkBSG3.png" alt=""><br>这里还有个点，就是上面的那个镜像我们也是 EXPOSE 80端口，然后外部宿主机会随机映射一个端口，为了偷个懒，我们就直接指定外部端口了<br><code>docker run -d -p 80:80 dynamic_web</code>打开浏览器发现访问不了，咋回事呢<br>因为我们没看<code>trafex/alpine-nginx-php7:latest</code>这个镜像<a href="https://hub.docker.com/r/trafex/alpine-nginx-php7" target="_blank" rel="noopener">说明</a>,它内部的服务是 8080 端口的，所以我们映射的暴露端口应该是 8080，再用<code>docker run -d -p 80:8080 dynamic_web</code>这个启动，<br><img data-src="https://i.loli.net/2020/03/21/qDd2LVhz1Po4McX.png" alt=""></p>
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<a href="/2020/03/15/docker%E6%AF%94%E4%B8%80%E8%88%AC%E5%A4%9A%E4%B8%80%E7%82%B9%E7%9A%84%E5%88%9D%E5%AD%A6%E8%80%85%E4%BB%8B%E7%BB%8D%E4%BA%8C/" class="post-title-link" itemprop="url">docker比一般多一点的初学者介绍二</a>
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<h2 id="限制下-docker-的-cpu-使用率"><a href="#限制下-docker-的-cpu-使用率" class="headerlink" title="限制下 docker 的 cpu 使用率"></a>限制下 docker 的 cpu 使用率</h2><p>这里我们开始玩一点有意思的，我们在容器里装下 vim 和 gcc，然后写这样一段 c 代码</p>
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<figure class="highlight c"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#<span class="meta-keyword">include</span> <span class="meta-string"><stdio.h></span></span></span><br><span class="line"><span class="function"><span class="keyword">int</span> <span class="title">main</span><span class="params">(<span class="keyword">void</span>)</span></span></span><br><span class="line"><span class="function"></span>{</span><br><span class="line"> <span class="keyword">int</span> i = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">for</span>(;;) i++;</span><br><span class="line"> <span class="keyword">return</span> <span class="number">0</span>;</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>就是一个最简单的死循环，然后在容器里跑起来</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">$</span><span class="bash"> gcc 1.c </span></span><br><span class="line"><span class="meta">$</span><span class="bash"> ./a.out</span></span><br></pre></td></tr></table></figure>
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<p>然后我们来看下系统资源占用（CPU）<br><img data-src="https://i.loli.net/2020/03/09/Xs562iawhHyMxeO.png" alt="Xs562iawhHyMxeO"><br>上图是在容器里的，可以看到 cpu 已经 100%了<br>然后看看容器外面的<br><img data-src="https://i.loli.net/2020/03/09/ecqH8XJ4k7rKhzu.png" alt="ecqH8XJ4k7rKhzu"><br>可以看到一个核的 cpu 也被占满了，因为是个双核的机器，并且代码是单线程的<br>然后呢我们要做点啥<br>因为已经在这个 ubuntu 容器中装了 vim 和 gcc，考虑到国内的网络，所以我们先把这个容器 commit 一下，</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">docker commit -a "nick" -m "my ubuntu" f63c5607df06 my_ubuntu:v1</span><br></pre></td></tr></table></figure>
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<p>然后再运行起来</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">docker run -it --cpus=0.1 my_ubuntu:v1 bash</span><br></pre></td></tr></table></figure>
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<p><img data-src="https://i.loli.net/2020/03/15/x2oGCPQr9Mm8ZYj.png" alt=""><br>我们的代码跟可执行文件都还在，要的就是这个效果，然后再运行一下<br><img data-src="https://i.loli.net/2020/03/10/3EgzYxpqlwobNRj.png" alt=""><br>结果是这个样子的，有点神奇是不，关键就在于 run 的时候的<code>--cpus=0.1</code>这个参数，它其实就是基于我前一篇说的 cgroup 技术，能将进程之间的cpu，内存等资源进行隔离</p>
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<h2 id="开始第一个-Dockerfile"><a href="#开始第一个-Dockerfile" class="headerlink" title="开始第一个 Dockerfile"></a>开始第一个 Dockerfile</h2><p>上一面为了复用那个我装了 vim 跟 gcc 的容器，我把它提交到了本地，使用了<code>docker commit</code>命令，有点类似于 git 的 commit，但是这个不是个很好的操作方式，需要手动介入，这里更推荐使用 Dockerfile 来构建镜像</p>
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<figure class="highlight docker"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">From</span> ubuntu:latest</span><br><span class="line"><span class="keyword">MAINTAINER</span> Nicksxs <span class="string">"nicksxs@hotmail.com"</span></span><br><span class="line"><span class="keyword">RUN</span><span class="bash"> sed -i s@/archive.ubuntu.com/@/mirrors.aliyun.com/@g /etc/apt/sources.list</span></span><br><span class="line"><span class="keyword">RUN</span><span class="bash"> apt-get clean</span></span><br><span class="line"><span class="keyword">RUN</span><span class="bash"> apt-get update && apt install -y nginx</span></span><br><span class="line"><span class="keyword">RUN</span><span class="bash"> <span class="built_in">echo</span> <span class="string">'Hi, i am in container'</span> \</span></span><br><span class="line"><span class="bash"> > /usr/share/nginx/html/index.html</span></span><br><span class="line"><span class="keyword">EXPOSE</span> <span class="number">80</span></span><br></pre></td></tr></table></figure>
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<p>先解释下这是在干嘛，首先是这个<code>From ubuntu:latest</code>基于的 ubuntu 的最新版本的镜像，然后第二行是维护人的信息，第三四行么作为墙内人你懂的，把 ubuntu 的源换成阿里云的，不然就有的等了，然后就是装下 nginx，往默认的 nginx 的入口 html 文件里输入一行欢迎语，然后暴露 80 端口<br>然后我们使用<code>sudo docker build -t="nicksxs/static_web" .</code>命令来基于这个 Dockerfile 构建我们自己的镜像，过程中是这样的<br><img data-src="https://i.loli.net/2020/03/15/aiIMrhy9WHetDSl.png" alt=""><br><img data-src="https://i.loli.net/2020/03/11/RC6yjImFZps4HWl.png" alt=""><br>可以看到图中，我的 Dockerfile 是 7 行，里面就执行了 7 步，并且每一步都有一个类似于容器 id 的层 id 出来，这里就是一个比较重要的东西，docker 在构建的时候其实是有这个层的概念，Dockerfile 里的每一行都会往上加一层，这里有还注意下命令后面的<code>.</code>，代表当前目录下会自行去寻找 Dockerfile 进行构建，构建完了之后我们再看下我们的本地镜像<br><img data-src="https://i.loli.net/2020/03/11/op5c7UGTbhjwPOI.png" alt=""><br>我们自己的镜像出现啦<br>然后有个问题，如果这个构建中途报了错咋办呢，来试试看，我们把 nginx 改成随便的一个错误名，nginxx(不知道会不会运气好真的有这玩意)，再来 build 一把<br><img data-src="https://i.loli.net/2020/03/14/ALWIobjchnu1Rvi.png" alt=""><br>找不到 nginxx 包，是不是这个镜像就完全不能用呢，当然也不是，因为前面说到了，docker 是基于层去构建的，可以看到前面的 4 个 step 都没报错，那我们基于最后的成功步骤创建下容器看看<br>也就是<code>sudo docker run -t -i bd26f991b6c8 /bin/bash</code><br>答案是可以的，只是没装成功 nginx<br><img data-src="https://i.loli.net/2020/03/14/grcMNVxTabDPipu.png" alt=""><br>还有一点注意到没，前面的几个 step 都有一句 <code>Using cache</code>，说明 docker 在构建镜像的时候是有缓存的，这也更能说明 docker 是基于层去构建镜像，同样的底包，同样的步骤，这些层是可以被复用的，这就是 docker 的构建缓存，当然我们也可以在 build 的时候加上<code>--no-cache</code>去把构建缓存禁用掉。</p>
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<p>因为最近想搭一个phabricator用来做看板和任务管理，一开始了解这个是Easy大大有在微博推荐过，后来苏洋也在群里和博客里说到了，看上去还不错的样子，因为主角是docker所以就不介绍太多，后面有机会写一下。</p>
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<p>docker最开始是之前在某位大佬的博客看到的，看上去有点神奇，感觉是一种轻量级的虚拟机，但是能做的事情好像差不多，那时候是在Ubuntu系统的vps里起一个Ubuntu的docker，然后在里面装个nginx，配置端口映射就可以访问了，后来也草草写过一篇使用docker搭建mysql集群，但是最近看了下好像是因为装docker的大佬做了一些别名还是什么操作，导致里面用的操作都不具有普遍性，而且主要是把搭的过程写了下，属于囫囵吞枣，没理解docker是干啥的，为啥用docker，就是操作了下，这几天借着搭phabricator的过程，把一些原来不理解，或者原来理解错误的地方重新理一下。</p>
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<p>之前写的 mysql 集群，一主二备，这种架构在很多小型应用里都是这么配置的，而且一般是直接在三台 vps 里启动三个 mysql 实例，但是如果换成 docker 会有什么好处呢，其实就是方便部署，比如其中一台备库挂了，我要加一台，或者说备库的 qps 太高了，需要再加一个，如果要在 vps 上搭建的话，首先要买一台机器，等初始化，然后在上面修改源，更新，装 mysql ，然后配置主从，可能还要处理防火墙等等，如果把这些打包成一个 docker 镜像，并且放在自己的 docker registry，那就直接run 一下就可以了；还有比如在公司要给一个新同学整一套开发测试环境，以 Java 开发为例，要装 git，maven，jdk，配置 maven settings 和各种 rc，整合在一个镜像里的话，就会很方便了；再比如微服务的水平扩展。</p>
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<p>但是为啥 docker 会有这种优势，听起来好像虚拟机也可以干这个事，但是虚拟机动辄上 G，而且需要 VMware，virtual box 等支持，不适合在Linux服务器环境使用，而且占用资源也会非常大。说得这么好，那么 docker 是啥呢</p>
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<p>docker 主要使用 Linux 中已经存在的两种技术的一个整合升级，一个是 namespace，一个是cgroups，相比于虚拟机需要完整虚拟出一个操作系统运行基础，docker 基于宿主机内核，通过 namespace 和 cgroups 分隔进程，理念就是提供一个隔离的最小化运行依赖，这样子相对于虚拟机就有了巨大的便利性，具体的 namespace 和 cgroups 就先不展开讲，可以参考耗子叔的文章</p>
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<h2 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h2><p>那么我们先安装下 docker，参考官方的教程，<a href="https://docs.docker.com/install/linux/docker-ce/ubuntu/" target="_blank" rel="noopener">安装</a>，我的系统是 ubuntu 的，就贴了 ubuntu 的链接，用其他系统的可以找到对应的系统文档安装，安装完了的话看看 docker 的信息</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo docker info</span><br></pre></td></tr></table></figure>
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<p>输出以下信息<br><img data-src="https://i.loli.net/2020/03/08/IJP157hLqlgo4Ow.png" alt=""></p>
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<h2 id="简单运行"><a href="#简单运行" class="headerlink" title="简单运行"></a>简单运行</h2><p>然后再来运行个 hello world 呗，</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo docker run hello-world</span><br></pre></td></tr></table></figure>
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<p>输出了这些<br><img data-src="https://i.loli.net/2020/03/08/7dO2JWbf3wVLPsN.png" alt=""></p>
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<p>看看这个运行命令是怎么用的，一般都会看到这样子的，sudo docker run -it ubuntu bash<code>, 前面的 docker run 反正就是运行一个容器的意思，</code>-it<code>是啥呢，还有这个什么 ubuntu bash，来看看</code>docker run`的命令帮助信息</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">-i, --interactive Keep STDIN open even if not attached</span><br></pre></td></tr></table></figure>
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<p>就是要有输入，我们运行的时候能输入</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">-t, --tty Allocate a pseudo-TTY</span><br></pre></td></tr></table></figure>
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<p>要有个虚拟终端，</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">Usage: docker run [OPTIONS] IMAGE [COMMAND] [ARG...]</span><br><span class="line"></span><br><span class="line">Run a command in a new container</span><br></pre></td></tr></table></figure>
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<h2 id="镜像"><a href="#镜像" class="headerlink" title="镜像"></a>镜像</h2><p>上面说的-it 就是这里的 options，后面那个 ubuntu 就是 image 辣，image 是啥呢</p>
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<p><strong>Docker 把应用程序及其依赖，打包在 image 文件里面</strong>，可以把它理解成为类似于虚拟机的镜像或者运行一个进程的代码，跑起来了的叫docker 容器或者进程，比如我们将要运行的<code>docker run -it ubuntu bash</code>的ubuntu 就是个 ubuntu 容器的镜像，将这个镜像运行起来后，我们可以进入容器像使用 ubuntu 一样使用它，来看下我们的镜像，使用<code>sudo docker image ls</code>就能列出我们宿主机上的 docker 镜像了</p>
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<p><img data-src="https://i.loli.net/2020/03/08/G3ltzyVLqheDRgo.png" alt=""></p>
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<p>一个 ubuntu 镜像才 64MB，非常小巧，然后是后面的<code>bash</code>，我通过交互式启动了一个 ubuntu 容器，然后在这个启动的容器里运行了 bash 命令，这样就可以在容器里玩一下了</p>
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<h2 id="在容器里看下进程，"><a href="#在容器里看下进程，" class="headerlink" title="在容器里看下进程，"></a>在容器里看下进程，</h2><p><img data-src="https://i.loli.net/2020/03/08/2qQFPbxB9uEzcrJ.png" alt=""></p>
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<p>只有刚才运行容器的 bash 进程和我刚执行的 ps，这里有个可以注意下的，bash 这个进程的 pid 是 1，其实这里就用到了 linux 中的PID Namespace，容器会隔离出一个 pid 的名字空间，这里面的进程跟外部的 pid 命名独立</p>
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<h2 id="查看宿主机上的容器"><a href="#查看宿主机上的容器" class="headerlink" title="查看宿主机上的容器"></a>查看宿主机上的容器</h2><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo docker ps -a</span><br></pre></td></tr></table></figure>
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<p><img data-src="https://i.loli.net/2020/03/08/spGtzcDXKv3ORU7.png" alt=""></p>
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<h2 id="如何进入一个正在运行中的-docker-容器"><a href="#如何进入一个正在运行中的-docker-容器" class="headerlink" title="如何进入一个正在运行中的 docker 容器"></a>如何进入一个正在运行中的 docker 容器</h2><p>这个应该是比较常用的，因为比如是一个微服务容器，有时候就像看下运行状态，日志啥的</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo docker exec -it [containerID] bash</span><br></pre></td></tr></table></figure>
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<p><img data-src="https://i.loli.net/2020/03/08/uswmh3Izp65kc9n.png" alt=""></p>
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<h2 id="查看日志"><a href="#查看日志" class="headerlink" title="查看日志"></a>查看日志</h2><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">sudo docker logs [containerID]</span><br></pre></td></tr></table></figure>
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<p>我在运行容器的终端里胡乱输入点啥，然后通过上面的命令就可以看到啦</p>
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<p><img data-src="https://i.loli.net/2020/03/08/RJAvlhEMD7VfbXz.png" alt=""></p>
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<p>寄生虫这部电影在获得奥斯卡之前就有关注了，豆瓣评分很高，一开始看到这个片名以为是像《铁线虫入侵》那种灾难片，后来看到男主，宋康昊，也是老面孔了，从高中时候在学校操场组织看的《汉江怪物》，有点二的感觉，后来在大学寝室电脑上重新看的时候，室友跟我说是韩国国宝级演员，真人不可貌相，感觉是个呆子的形象。</p>
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<p>但是你说这不是个灾难片，而是个反映社会问题的，就业比较容易往这个方向猜，只是剧情会是怎么样的，一时也没啥头绪，后来不知道哪里看了下一个剧情透露，是一个穷人给富人做家教，然后把自己一家都带进富人家，如果是这样的话可能会把这个怎么带进去作为一个主线，不过事实告诉我，这没那么重要，从第一步朋友的介绍，就显得无比顺利，要去当家教了，作为一个穷成这样的人，瞬间转变成一个衣着得体，言行举止都没让富人家看出破绽的延世大学学生，这真的挺难让人理解，所谓江山易改，本性难移，还有就是这人也正好有那么好能力去辅导，并且诡异的是，多惠也是瞬间就喜欢上了男主，多惠跟将男主介绍给她做家教，也就是多惠原来的家教敏赫，应该也有不少的相处时间，这变了有点大了吧，当然这里也可能因为时长需要，如果说这一点是因为时长，那可能我所有的槽点都是因为这个吧，因为我理解的应该是把家里的人如何一步步地带进富人家，这应该是整个剧情的一个需要更多铺垫去克服这个矛盾点，有时候也想过如果我去当导演，是能拍出个啥，没这个机会，可能有也会是很扯淡的，当然这也不能阻拦我谈谈对这个点的一些看法，毕竟评价一台电冰箱不是说我必须得自己会制冷对吧，这大概是我觉得这个电影的第一个槽点，接下去接二连三的，就是我说的这个最核心的矛盾点，不知道谁说过，这种影视剧应该是源自于生活又高于生活，越是好的作品，越要接近生活，这样子才更能有感同身受。</p>
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<p>接下去的点是金基宇介绍金基婷去给多颂当美术家教，这一步又是我理解的败笔吧，就怎么说呢，没什么铺垫，突然从一个社会底层的穷姑娘，转变成一个气场爆表，把富人家太太唬得一愣一愣的，如果说富太太是比较简单无脑的，那富人自己应该是比较有见识而且是做 IT 的，给自己儿子女儿做家教的，查查底细也很正常吧，但是啥都没有，然后呢，她又开始耍司机的心机了，真的是莫名其妙了，司机真的很惨，窈窕淑女君子好逑，而且这个操作也让我摸不着头脑，这是多腹黑并且有经验才会这么操作，脱内裤真的是让我看得一愣愣的，更看得我一愣一愣的，富人竟然也完全按着这个思路去想了，完全没有别的可能呢，甚至可以去查下行车记录仪或者怎样的，或者有没有毛发体液啥的去检验下，毕竟金基婷也乘坐过这辆车，但是最最让我不懂的还是脱内裤这个操作，究竟是什么样的人才会的呢，值得思考。</p>
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<p>金基泽和忠淑的点也是比较奇怪，首先是金基泽，引起最后那个杀人事件的一个由头，大部分观点都是人为朴社长在之前跟老婆啪啪啪的时候说金基泽的身上有股乘地铁的人的味道，简而言之就是穷人的味道，还有去雯光丈夫身下拿钥匙是对金基泽和雯光丈夫身上的味道的鄙夷，可是这个原因真的站不住脚，即使是同样经济水平，如果身上有比较重的异味，背后讨论下，或者闻到了比较重的味道，有不适的表情和动作很正常吧，像雯光丈夫，在地下室里呆了那么久，身上有异味并且比较重太正常了，就跟在厕所呆久了不会觉得味道大，但是从没味道的地方一进有点味道的厕所就会觉得异样，略尴尬的理由；再说忠淑呢，感觉是太厉害了，能胜任这么一家有钱人的各种挑剔的饮食口味要求的保姆职位，也是让人看懵逼了，看到了不禁想到一个问题，这家人开头是那么地穷，不堪，突然转变成这么地像骗子家族，如果有这么好的骗人能力，应该不会到这种地步吧，如果真的是那么穷，没能力，没志气，又怎么会突然变成这么厉害呢，一家人各司其职，把富人家唬得团团转，而这个前提是，这些人的确能胜任这四个位置，这就是我非常不能理解的点。</p>
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<p>然后说回这个标题，寄生虫，不知道是不是翻译过来不准确，如果真的是叫寄生虫的话，这个寄生虫智商未免也太低了，没有像新冠那样机制，致死率低一点，传染能力强一点，潜伏期也能传染，这个寄生虫第一次受到免疫系统的攻击就自爆了；还有呢，作为一个社会比较低层的打工者，乡下人，对这个审题也是不太审的清，是指这一家人是社会的寄生虫，不思进取，并且死的应该，富人是傻白甜，又有钱又善良，这是给有钱人洗地了还是啥，这个奥斯卡真不知道是怎么得的，总觉得奥斯卡，甚至低一点，豆瓣，得奖的，评分高的都是被一群“精英党”把持的，有黑人主角的，得分高；有同性恋的，得分高；结局惨的，得分高；看不懂的，得分高；就像肖申克的救赎，真不知道是哪里好了，最近看了关于明朝那些事的三杨，杨溥的经历应该比这个厉害吧，可是外国人看不懂，就像外国人不懂中国为什么有反分裂国家法，经历了鸦片战争，八国联军，抗日战争等等，其实跟外国对于黑人的权益的问题，因为有南北战争，所以极度重视这个问题，相应的中国也有自己的历史，请理解。</p>
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<p>简而言之我对寄生虫的评分大概 5~6 分吧。</p>
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<a href="/2020/02/22/gogs%E4%BD%BF%E7%94%A8webhook%E9%83%A8%E7%BD%B2react%E5%8D%95%E9%A1%B5%E5%BA%94%E7%94%A8/" class="post-title-link" itemprop="url">gogs使用webhook部署react单页应用</a>
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<p>众所周知，我是个前端彩笔，但是也想做点自己可以用的工具页面，所以就让朋友推荐了蚂蚁出品的 ant design，说基本可以直接 ctrl-c ctrl-v，实测对我这种来说还是有点难的，不过也能写点，但是现在碰到的问题是怎么部署到自己的服务器上去<br>用 ant design 写的是个单页应用，实际来说就是一个 html 加 css 跟 js，最初的时候是直接 build 完就 scp 上去，也考虑过 rsync 之类的，但是都感觉不够自动化，正好自己还没这方面的经验就想折腾下，因为我自己搭的仓库应用是 gogs，搜了一下主要是跟 drones 配合做 ci/cd，研究了一下发现其实这个事情没必要这么搞(PS：drone 也不好用)，整个 hook 就可以了, 但是实际上呢，这东西也不是那么简单<br>首先是需要在服务器上装 <a href="https://github.com/adnanh/webhook" target="_blank" rel="noopener">webhook</a>，这个我一开始用 snap 安装，但是出现问题，run 的时候会出现后面参数带的 hooks.json 文件找不到，然后索性就直接 github 上下最新版，放 /usr/local/bin 了，webhook 的原理呢其实也比较简单，就是起一个 http 服务，通过 post 请求调用，解析下参数，如果跟配置的参数一致，就调用对应的命令或者脚本。</p>
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<h2 id="配置-hooks-json"><a href="#配置-hooks-json" class="headerlink" title="配置 hooks.json"></a>配置 hooks.json</h2><p>webhook 的配置，需要的两个文件，一个是 hooks.json，这个是 webhook 服务的配置文件，像这样</p>
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<figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br></pre></td><td class="code"><pre><span class="line">[</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"id"</span>: <span class="string">"redeploy-app"</span>,</span><br><span class="line"> <span class="attr">"execute-command"</span>: <span class="string">"/opt/scripts/redeploy.sh"</span>,</span><br><span class="line"> <span class="attr">"command-working-directory"</span>: <span class="string">"/opt/scripts"</span>,</span><br><span class="line"> <span class="attr">"pass-arguments-to-command"</span>:</span><br><span class="line"> [</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"source"</span>: <span class="string">"payload"</span>,</span><br><span class="line"> <span class="attr">"name"</span>: <span class="string">"head_commit.message"</span></span><br><span class="line"> },</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"source"</span>: <span class="string">"payload"</span>,</span><br><span class="line"> <span class="attr">"name"</span>: <span class="string">"pusher.name"</span></span><br><span class="line"> },</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"source"</span>: <span class="string">"payload"</span>,</span><br><span class="line"> <span class="attr">"name"</span>: <span class="string">"head_commit.id"</span></span><br><span class="line"> }</span><br><span class="line"> ],</span><br><span class="line"> <span class="attr">"trigger-rule"</span>:</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"and"</span>:</span><br><span class="line"> [</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"match"</span>:</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"type"</span>: <span class="string">"payload-hash-sha1"</span>,</span><br><span class="line"> <span class="attr">"secret"</span>: <span class="string">"your-github-secret"</span>,</span><br><span class="line"> <span class="attr">"parameter"</span>:</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"source"</span>: <span class="string">"header"</span>,</span><br><span class="line"> <span class="attr">"name"</span>: <span class="string">"X-Hub-Signature"</span></span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> },</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"match"</span>:</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"type"</span>: <span class="string">"value"</span>,</span><br><span class="line"> <span class="attr">"value"</span>: <span class="string">"refs/heads/master"</span>,</span><br><span class="line"> <span class="attr">"parameter"</span>:</span><br><span class="line"> {</span><br><span class="line"> <span class="attr">"source"</span>: <span class="string">"payload"</span>,</span><br><span class="line"> <span class="attr">"name"</span>: <span class="string">"ref"</span></span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> ]</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line">]</span><br></pre></td></tr></table></figure>
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<p>这是个跟 github搭配的示例，首先 id 表示的是这个对应 hook 的识别 id，也可以看到这个 hooks.json 的结构是这样的一个数组，然后就是要执行的命令和命令执行的参数，值得注意的是这个<code>trigger-rule</code>,就是请求进来了回去匹配里面的，比如前一个是一个加密的，放在请求头里，第二个 match 表示请求里的 ref 是个 master 分支，就可以区分分支进行不同操作，但是前面的加密配合 gogs 使用的时候有个问题(PS: webhook 的文档是真的烂)，gogs 设置 webhook 的加密是用的</p>
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<blockquote>
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<p>密钥文本将被用于计算推送内容的 SHA256 HMAC 哈希值，并设置为 <code>X-Gogs-Signature</code> 请求头的值。</p>
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</blockquote>
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<p>这种加密方式，所以 webhook 的这个示例的加密方式不行，但这货的文档里居然没有说明支持哪些加密，神TM，后来还是翻 <a href="https://github.com/adnanh/webhook/issues/289" target="_blank" rel="noopener">issue</a> 翻到了, 需要使用这个<code>payload-hash-sha256</code></p>
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<h2 id="执行脚本-redeploy-sh"><a href="#执行脚本-redeploy-sh" class="headerlink" title="执行脚本 redeploy.sh"></a>执行脚本 redeploy.sh</h2><p>脚本类似于这样</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">#</span><span class="bash">!/bin/bash -e</span></span><br><span class="line"></span><br><span class="line">function cleanup {</span><br><span class="line"> echo "Error occoured"</span><br><span class="line">}</span><br><span class="line">trap cleanup ERR</span><br><span class="line"></span><br><span class="line">commit_message=$1 # head_commit.message</span><br><span class="line">pusher_name=$2 # pusher.name</span><br><span class="line">commit_id=$3 # head_commit.id</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">cd ~/do-react-example-app/</span><br><span class="line">git pull origin master</span><br><span class="line">yarn && yarn build</span><br></pre></td></tr></table></figure>
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<p>就是简单的拉代码，然后构建下，真实使用时可能不是这样，因为页面会部署在 nginx 的作用目录，还需要 rsync 过去，这部分可能还涉及到两个问题第一个是使用 rsync 还是其他的 cp，不过这个无所谓；第二个是目录权限的问题，以我的系统ubuntu 为例，默认用户是 ubuntu，nginx 部署的目录是 www，所以需要切换用户等操作，一开始是想用在shell 文件中直接写了密码，但是不知道咋传，查了下是类似于这样 <code>echo "passwd" | sudo -S cmd</code>，通过管道命令往后传，然后就是这个<code>-S</code>, 参数的解释是<code>-S, --stdin read password from standard input</code>,但是这样么也不是太安全的赶脚，又看了下还有两种方法，</p>
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<ul>
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<li><p>就是给root 设置一个不需要密码的命令类似于这样，</p>
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<figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">myusername ALL = (ALL) ALL</span><br><span class="line">myusername ALL = (root) NOPASSWD: /path/to/my/program</span><br></pre></td></tr></table></figure>
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</li>
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<li><p>另一种就是把默认用户跟 root 设置成同一个 group 的</p>
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</li>
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</ul>
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<h2 id="使用"><a href="#使用" class="headerlink" title="使用"></a>使用</h2><p>真正实操的时候其实还有不少问题，首先运行 webhook 就碰到了我前面说的，使用 snap 运行的时候会找不到前面的 hooks.json配置文件，执行<code>snap run webhook -hooks /opt/hooks/hooks.json -verbose</code>就碰到下面的<code>couldn't load hooks from file! open /opt/hooks/hooks.json: no such file or directory</code>，后来直接下了个官方最新的 release，就直接执行 <code>webhook -hooks /opt/hooks/hooks.json -verbose</code> 就可以了，然后是前面的示例配置文件里的几个参数，比如<code>head_commit.message</code> 其实 gogs 推过来的根本没这玩意，而且都是数组，不知道咋取，烂文档，不过总比搭个 drone 好一点就忍了。补充一点就是在 debug 的时候需要看下问题出在哪，看看脚本有没有执行，所以需要在前面的 json 里加这个参数<code>"include-command-output-in-response": true</code>, 就能输出来脚本执行结果</p>
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|
<ul class="links-of-blogroll-list">
|
|
<li class="links-of-blogroll-item">
|
|
<a href="https://covermusic.cn/" title="https://covermusic.cn" rel="noopener" target="_blank">69伙伴</a>
|
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</li>
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</ul>
|
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</div>
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</div>
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</div>
|
|
</aside>
|
|
<div id="sidebar-dimmer"></div>
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|
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|
|
|
</div>
|
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</main>
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|
|
|
<footer class="footer">
|
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<div class="footer-inner">
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|
|
<div class="copyright">
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|
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©
|
|
<span itemprop="copyrightYear">2020</span>
|
|
<span class="with-love">
|
|
<i class="fa fa-heart"></i>
|
|
</span>
|
|
<span class="author" itemprop="copyrightHolder">Nicksxs</span>
|
|
</div>
|
|
<div class="powered-by">Powered by <a href="https://hexo.io/" class="theme-link" rel="noopener" target="_blank">Hexo</a> & <a href="https://pisces.theme-next.org/" class="theme-link" rel="noopener" target="_blank">NexT.Pisces</a>
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</div>
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|
|
<div class="busuanzi-count">
|
|
<script async src="https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script>
|
|
<span class="post-meta-item" id="busuanzi_container_site_uv" style="display: none;">
|
|
<span class="post-meta-item-icon">
|
|
<i class="fa fa-user"></i>
|
|
</span>
|
|
<span class="site-uv" title="Total Visitors">
|
|
<span id="busuanzi_value_site_uv"></span>
|
|
</span>
|
|
</span>
|
|
<span class="post-meta-divider">|</span>
|
|
<span class="post-meta-item" id="busuanzi_container_site_pv" style="display: none;">
|
|
<span class="post-meta-item-icon">
|
|
<i class="fa fa-eye"></i>
|
|
</span>
|
|
<span class="site-pv" title="Total Views">
|
|
<span id="busuanzi_value_site_pv"></span>
|
|
</span>
|
|
</span>
|
|
</div>
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|
|
<script>
|
|
(function() {
|
|
function leancloudSelector(url) {
|
|
url = encodeURI(url);
|
|
return document.getElementById(url).querySelector('.leancloud-visitors-count');
|
|
}
|
|
|
|
function addCount(Counter) {
|
|
var visitors = document.querySelector('.leancloud_visitors');
|
|
var url = decodeURI(visitors.id);
|
|
var title = visitors.dataset.flagTitle;
|
|
|
|
Counter('get', '/classes/Counter?where=' + encodeURIComponent(JSON.stringify({ url })))
|
|
.then(response => response.json())
|
|
.then(({ results }) => {
|
|
if (results.length > 0) {
|
|
var counter = results[0];
|
|
leancloudSelector(url).innerText = counter.time + 1;
|
|
Counter('put', '/classes/Counter/' + counter.objectId, { time: { '__op': 'Increment', 'amount': 1 } })
|
|
.catch(error => {
|
|
console.error('Failed to save visitor count', error);
|
|
});
|
|
} else {
|
|
leancloudSelector(url).innerText = 'Counter not initialized! More info at console err msg.';
|
|
console.error('ATTENTION! LeanCloud counter has security bug, see how to solve it here: https://github.com/theme-next/hexo-leancloud-counter-security. \n However, you can still use LeanCloud without security, by setting `security` option to `false`.');
|
|
|
|
}
|
|
})
|
|
.catch(error => {
|
|
console.error('LeanCloud Counter Error', error);
|
|
});
|
|
}
|
|
|
|
function showTime(Counter) {
|
|
var visitors = document.querySelectorAll('.leancloud_visitors');
|
|
var entries = [...visitors].map(element => {
|
|
return decodeURI(element.id);
|
|
});
|
|
|
|
Counter('get', '/classes/Counter?where=' + encodeURIComponent(JSON.stringify({ url: { '$in': entries } })))
|
|
.then(response => response.json())
|
|
.then(({ results }) => {
|
|
for (let url of entries) {
|
|
let target = results.find(item => item.url === url);
|
|
leancloudSelector(url).innerText = target ? target.time : 0;
|
|
}
|
|
})
|
|
.catch(error => {
|
|
console.error('LeanCloud Counter Error', error);
|
|
});
|
|
}
|
|
|
|
let { app_id, app_key, server_url } = {"enable":true,"app_id":"ysza182Vghlqjdt7QiwGLLJy-gzGzoHsz","app_key":"s9GDqbn7gnGGkusf66YRVccw","server_url":"https://leancloud.cn","security":true};
|
|
function fetchData(api_server) {
|
|
var Counter = (method, url, data) => {
|
|
return fetch(`${api_server}/1.1${url}`, {
|
|
method,
|
|
headers: {
|
|
'X-LC-Id' : app_id,
|
|
'X-LC-Key' : app_key,
|
|
'Content-Type': 'application/json',
|
|
},
|
|
body: JSON.stringify(data)
|
|
});
|
|
};
|
|
if (CONFIG.page.isPost) {
|
|
if (CONFIG.hostname !== location.hostname) return;
|
|
addCount(Counter);
|
|
} else if (document.querySelectorAll('.post-title-link').length >= 1) {
|
|
showTime(Counter);
|
|
}
|
|
}
|
|
|
|
let api_server = app_id.slice(-9) !== '-MdYXbMMI' ? server_url : `https://${app_id.slice(0, 8).toLowerCase()}.api.lncldglobal.com`;
|
|
|
|
if (api_server) {
|
|
fetchData(api_server);
|
|
} else {
|
|
fetch('https://app-router.leancloud.cn/2/route?appId=' + app_id)
|
|
.then(response => response.json())
|
|
.then(({ api_server }) => {
|
|
fetchData('https://' + api_server);
|
|
});
|
|
}
|
|
})();
|
|
</script>
|
|
|
|
|
|
</div>
|
|
</footer>
|
|
</div>
|
|
|
|
|
|
<script src="/lib/anime.min.js"></script>
|
|
<script src="//cdn.jsdelivr.net/npm/jquery@3/dist/jquery.min.js"></script>
|
|
<script src="//cdn.jsdelivr.net/gh/fancyapps/fancybox@3/dist/jquery.fancybox.min.js"></script>
|
|
<script src="//cdn.jsdelivr.net/npm/lozad@1/dist/lozad.min.js"></script>
|
|
<script src="/lib/velocity/velocity.min.js"></script>
|
|
<script src="/lib/velocity/velocity.ui.min.js"></script>
|
|
|
|
<script src="/js/utils.js"></script>
|
|
|
|
<script src="/js/motion.js"></script>
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|
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|
|
<script src="/js/schemes/pisces.js"></script>
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|
|
<script src="/js/next-boot.js"></script>
|
|
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|
|
<script>
|
|
(function(){
|
|
var canonicalURL, curProtocol;
|
|
//Get the <link> tag
|
|
var x=document.getElementsByTagName("link");
|
|
//Find the last canonical URL
|
|
if(x.length > 0){
|
|
for (i=0;i<x.length;i++){
|
|
if(x[i].rel.toLowerCase() == 'canonical' && x[i].href){
|
|
canonicalURL=x[i].href;
|
|
}
|
|
}
|
|
}
|
|
//Get protocol
|
|
if (!canonicalURL){
|
|
curProtocol = window.location.protocol.split(':')[0];
|
|
}
|
|
else{
|
|
curProtocol = canonicalURL.split(':')[0];
|
|
}
|
|
//Get current URL if the canonical URL does not exist
|
|
if (!canonicalURL) canonicalURL = window.location.href;
|
|
//Assign script content. Replace current URL with the canonical URL
|
|
!function(){var e=/([http|https]:\/\/[a-zA-Z0-9\_\.]+\.baidu\.com)/gi,r=canonicalURL,t=document.referrer;if(!e.test(r)){var n=(String(curProtocol).toLowerCase() === 'https')?"https://sp0.baidu.com/9_Q4simg2RQJ8t7jm9iCKT-xh_/s.gif":"//api.share.baidu.com/s.gif";t?(n+="?r="+encodeURIComponent(document.referrer),r&&(n+="&l="+r)):r&&(n+="?l="+r);var i=new Image;i.src=n}}(window);})();
|
|
</script>
|
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|
|
<script>
|
|
function loadCount() {
|
|
var d = document, s = d.createElement('script');
|
|
s.src = 'https://nicksxs.disqus.com/count.js';
|
|
s.id = 'dsq-count-scr';
|
|
(d.head || d.body).appendChild(s);
|
|
}
|
|
// defer loading until the whole page loading is completed
|
|
window.addEventListener('load', loadCount, false);
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|