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itemprop=publisher itemscope itemtype=http://schema.org/Organization><meta content="Nicksxs's Blog" itemprop=name><meta content="Nicksxs 的技术博客,深入 Java 运行时与生产诊断、低成本大模型推理和 Agent 工程实践。" itemprop=description></span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork><meta content="docker比一般多一点的初学者介绍三 | Nicksxs's Blog" itemprop=name><meta content="上一篇的 Dockerfile 我们停留在构建阶段,现在来把它跑起来 这里的-d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 staticweb,使用了我们上次构建的 staticweb 镜像,后面的是让…" itemprop=description></span><header class=post-header><h1 itemprop="name headline" class=post-title>docker比一般多一点的初学者介绍三</h1><div class=post-meta-container><div class=post-meta><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-calendar"></i> </span><span class=post-meta-item-text>发表于</span> <time itemprop="dateCreated datePublished" title="创建时间:2020-03-21 14:43:39" datetime=2020-03-21T14:43:39+08:00>2020-03-21</time> </span><span class=post-meta-item><span class=post-meta-item-icon><i class="far fa-folder"></i> </span><span class=post-meta-item-text>分类于</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Docker/ itemprop=url rel=index><span itemprop=name>Docker</span></a> </span>, <span itemprop=about itemscope itemtype=http://schema.org/Thing><a href=/categories/Docker/%E4%BB%8B%E7%BB%8D/ itemprop=url rel=index><span itemprop=name>介绍</span></a> </span></span><span class="post-meta-item cloudflare-page-counter" data-increment=true data-path=/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/ data-title=docker比一般多一点的初学者介绍三 title=阅读次数><span class=post-meta-item-icon><i class="far fa-eye"></i> </span><span class=post-meta-item-text>阅读次数:</span> <span class=cloudflare-page-counter-count></span></span></div><div class=post-description>上一篇的 Dockerfile 我们停留在构建阶段,现在来把它跑起来 这里的-d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 staticweb,使用了我们上次构建的 staticweb 镜像,后面的是让…</div></div></header><div class=post-body itemprop=articleBody><h2 id=运行第一个-Dockerfile><a title="运行第一个 Dockerfile" class=headerlink href=#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<figure class="highlight shell"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br></pre><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></table></figure><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 loading=lazy src=https://i.loli.net/2020/03/21/VCEuf5BTopXNkcA.png><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 loading=lazy src=https://i.loli.net/2020/03/21/Cx1JYGBrHRqojpz.png><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 loading=lazy src=https://i.loli.net/2020/03/21/xhAcQlX5iP9KnYB.png><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 loading=lazy src=https://i.loli.net/2020/03/21/wE8TfkbC2d9pNuv.png><br>所以把刚才的内容复制过去再试试<br><img loading=lazy src=https://i.loli.net/2020/03/21/qNkpHn3GW8aiwIr.png><br>目标达成,give me five✌️<h2 id=第二个-Dockerfile><a title="第二个 Dockerfile" class=headerlink href=#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<figure class="highlight php"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br></pre><td class=code><pre><span class=line><span class=meta>&LT?php</span></span><br><span class=line><span class=keyword>echo</span> <span class=string>"Hello World!"</span>;</span><br></pre></table></figure><p>然后在 dynamic_web 目录下创建 Dockerfile,<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 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=language-bash> src/ /var/www/html</span></span><br><span class=line><span class=keyword>EXPOSE</span> <span class=number>80</span></span><br></pre></table></figure><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<blockquote><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 rel=noopener target=_blank>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。</blockquote><blockquote><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。</blockquote><blockquote><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。</blockquote><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 loading=lazy src=https://i.loli.net/2020/03/21/56cuKf1ObvkBSG3.png><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 rel=noopener target=_blank>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 loading=lazy src=https://i.loli.net/2020/03/21/qDd2LVhz1Po4McX.png></div><footer class=post-footer><div class="affiliate-creative affiliate-creative--post-end" data-affiliate-id=tencent-cloud-server><a rel="sponsored noopener" aria-label=腾讯云服务器优惠 href=https://cloud.tencent.com/act/cps/redirect?redirect=6544&cps_key=2e33a1eedb380997d03618b4a5ba6ca7&from=console target=_blank><img alt="腾讯云 AI 焕新云服务器优惠" decoding=async height=241 loading=lazy src=/uploads/affiliate/tencent-cloud-server.webp width=690> </a><span class=affiliate-disclosure>推广</span></div><div class=reward-container><div>请我一杯咖啡吧!</div><button>赞赏</button><div class=post-reward><div><img alt="Nicksxs 微信" src=https://i.loli.net/2020/01/12/NUlWanT31E8LQGx.png><span>微信</span></div><div><img alt="Nicksxs 支付宝" 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