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badge--secondary">版本:Latest</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">本页总览</button></div><div class="theme-doc-markdown markdown"><header><h1>Kubernetes 资源</h1></header><p>你可以在 Rancher UI 中查看和操作 Kubernetes 集群中的所有自定义资源和 CRD。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="工作负载">工作负载<a href="#工作负载" class="hash-link" aria-label="标题的直接链接" title="标题的直接链接"></a></h2><p>使用<a href="/zh/pages-for-subheaders/workloads-and-pods">工作负载</a>将应用部署到集群节点,工作负载是包含用于运行应用的 pod 的对象,以及为部署行为设置规则的元数据。工作负载可以部署在集群范围内,也可以部署在一个命名空间内。</p><p>部署工作负载时,你可以使用任何镜像进行部署。可供选择的<a href="/zh/pages-for-subheaders/workloads-and-pods#%E5%B7%A5%E4%BD%9C%E8%B4%9F%E8%BD%BD%E7%B1%BB%E5%9E%8B">工作负载类型</a>有多种,工作负载类型决定了你的应用程序的运行方式。</p><p>在工作负载部署之后,你可以继续使用它。你可以:</p><ul><li>将工作负载<a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/workloads-and-pods/upgrade-workloads">升级</a>到它运行的应用的更新版本。</li><li>如果升级出现问题,将工作负载<a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/workloads-and-pods/roll-back-workloads">回滚</a>到以前的版本。</li><li><a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/workloads-and-pods/add-a-sidecar">添加一个 sidecar</a>,这是一个支持主要工作负载的工作负载。</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="负载均衡和-ingress">负载均衡和 Ingress<a href="#负载均衡和-ingress" class="hash-link" aria-label="标题的直接链接" title="标题的直接链接"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="负载均衡器">负载均衡器<a href="#负载均衡器" class="hash-link" aria-label="标题的直接链接" title="标题的直接链接"></a></h3><p>启动应用程序后,它仅在集群中可用。无法从外部访问它。</p><p>如果你希望你的应用程序可以从外部访问,则必须向集群添加负载均衡器。如果用户知道负载均衡器的 IP 地址和应用的端口号,负载均衡器可以为外部连接创建一个访问集群的网关。</p><p>Rancher 支持两种类型的负载均衡器:</p><ul><li><a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/load-balancer-and-ingress-controller/layer-4-and-layer-7-load-balancing#%E5%9B%9B%E5%B1%82%E8%B4%9F%E8%BD%BD%E5%9D%87%E8%A1%A1%E5%99%A8">Layer-4 负载均衡器</a></li><li><a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/load-balancer-and-ingress-controller/layer-4-and-layer-7-load-balancing#%E4%B8%83%E5%B1%82%E8%B4%9F%E8%BD%BD%E5%9D%87%E8%A1%A1%E5%99%A8">Layer-7 负载均衡器</a></li></ul><p>有关详细信息,请参阅<a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/load-balancer-and-ingress-controller/layer-4-and-layer-7-load-balancing">负载均衡器</a>。</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="ingress">Ingress<a href="#ingress" class="hash-link" aria-label="标题的直接链接" title="标题的直接链接"></a></h4><p>负载均衡器只能处理每个 service 的一个 IP 地址。换言之,如果你在集群中运行了多个 service,则必须为每个 service 配备一个负载均衡器。运行多个负载均衡器的花费可能非常高昂。因此,你可以使用 Ingress 来解决此问题。</p><p>Ingress 是一组充当负载均衡器的规则。Ingress 与一个或多个 Ingress Controller 一起动态路由 service 的请求。Ingress 收到请求时,集群中的 Ingress Controller 会对负载均衡器进行配置,从而根据你配置的 service 子域或路径规则将请求定向到正确的 service。</p><p>有关详细信息,请参阅 <a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/load-balancer-and-ingress-controller/add-ingresses">Ingress</a>。</p><p>在项目中使用 Ingress 时,你可以通过设置全局 DNS 条目来将 Ingress 主机名编程到外部 DNS。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="服务发现">服务发现<a href="#服务发现" class="hash-link" aria-label="标题的直接链接" title="标题的直接链接"></a></h2><p>使用负载均衡器和/或 Ingress 将集群公开给外部请求后,你只能通过 IP 地址访问集群。要创建可解析的主机名,你必须创建服务记录,该记录将 IP 地址、外部主机名、DNS 记录别名、工作负载或标记的 pod 映射到特定主机名。</p><p>有关详细信息,请参阅<a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/create-services">服务发现</a>。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="应用程序">应用程序<a href="#应用程序" class="hash-link" aria-label="标题的直接链接" title="标题的直接链接"></a></h2><p>除了启动应用程序的各个组件外,你还可以使用 Rancher 应用商店来启动应用,即 Helm Chart。</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="kubernetes-资源">Kubernetes 资源<a href="#kubernetes-资源" class="hash-link" aria-label="标题的直接链接" title="标题的直接链接"></a></h2><p>在 Rancher 项目或命名空间的上下文中,<em>资源</em> 是支持 Pod 操作的文件和数据。在 Rancher 中,证书、镜像仓库和密文都被视为资源。但是,Kubernetes 将资源划分为不同类型的<a href="https://kubernetes.io/docs/concepts/configuration/secret/" target="_blank" rel="noopener noreferrer">密文(secret)</a>。因此,在单个项目或命名空间中,各个资源必须具有唯一的名称以避免冲突。资源主要用于承载敏感信息,但也有其他用途。</p><p>资源包括:</p><ul><li><a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/encrypt-http-communication">证书</a>:用于加密/解密进入或离开集群的数据的文件。</li><li><a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/configmaps">ConfigMap</a>:存储一般配置信息的文件,例如一组配置文件。</li><li><a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/secrets">密文</a>:存储密码、token 或密钥等敏感数据的文件。</li><li><a href="/zh/how-to-guides/new-user-guides/kubernetes-resources-setup/kubernetes-and-docker-registries">镜像仓库</a>:携带用于验证私有镜像仓库的凭证的文件。</li></ul></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a 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