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<a href=/v1.20/zh/docs/setup/getting-started class="btn btn--primary" id=try-istio>试用 Istio</a></div></div><form id=search-form class=search name=cse role=search><input type=hidden name=cx value=002184991200833970123:iwwf17ikgf4>
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<button id=search-close title=取消搜索 type=reset aria-label=取消搜索><svg class="icon menu-close"><use xlink:href="/v1.20/img/icons.svg#menu-close"/></svg></button></form></nav></header><div class=banner-container></div><article class=post itemscope itemtype=http://schema.org/BlogPosting><div class=header-content><h1>使用 cert-manager 部署一个自定义 Ingress 网关</h1><p>如何使用 cert-manager 手工部署一个自定义 Ingress 网关。</p></div><p class=post-author>Jan 10, 2019 <span>| </span>By Julien Senon</p><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.20/img/icons.svg#callout-warning"/></svg></div><div class=content>该博客文章是在 Istio 1 的版本下编写的，因此其中某些内容现在可能已过时。</div></aside></div><div><p>本文介绍了手工创建自定义 Ingress <a href=/v1.20/zh/docs/reference/config/networking/gateway/>Gateway</a> 的过程，其中使用 cert-manager 完成了证书的自动管理。</p><p>自定义 Ingress 网关在使用不同负载均衡器来隔离通信的情况下很有帮助。</p><h2 id=before-you-begin>开始之前</h2><ul><li>根据<a href=/v1.20/zh/docs/setup/>安装指南</a>完成 Istio 的部署。</li><li>用 Helm <a href=https://github.com/helm/charts/tree/master/stable/cert-manager#installing-the-chart>Chart</a> 部署 <code>cert-manager</code>。</li><li>我们会使用 <code>demo.mydemo.com</code> 进行演示，因此您的 DNS 解析要能够解析这个域名。</li></ul><h2 id=configuring-the-custom-ingress-gateway>配置自定义 Ingress 网关</h2><ol><li><p>用下面的 <code>helm</code> 命令检查 <a href=https://github.com/helm/charts/tree/master/stable/cert-manager>cert-manager</a> 是否已经完成部署：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ helm ls
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</code></pre><p>该命令的输出大概如下所示，其中的 <code>cert-manager</code> 的 <code>STATUS</code> 字段应该是 <code>DEPLOYED</code></p><pre><code class=language-plain data-expandlinks=true data-repo=istio>NAME REVISION UPDATED STATUS CHART APP VERSION NAMESPACE
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istio 1 Thu Oct 11 13:34:24 2018 DEPLOYED istio-1.0.X 1.0.X istio-system
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cert 1 Wed Oct 24 14:08:36 2018 DEPLOYED cert-manager-v0.6.0-dev.2 v0.6.0-dev.2 istio-system
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</code></pre></li><li><p>要创建集群的证书签发者，可以使用如下的配置：</p><div><aside class="callout tip"><div class=type><svg class="large-icon"><use xlink:href="/v1.20/img/icons.svg#callout-tip"/></svg></div><div class=content>用自己的配置修改集群的<a href=https://cert-manager.readthedocs.io/en/latest/reference/issuers.html>证书签发者</a>。例子中使用的是 <code>route53</code>。</div></aside></div><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: certmanager.k8s.io/v1alpha1
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kind: ClusterIssuer
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metadata:
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name: letsencrypt-demo
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namespace: kube-system
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spec:
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acme:
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# ACME 服务器地址
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server: https://acme-v02.api.letsencrypt.org/directory
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# ACME 注册的 Email 地址
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email: <REDACTED>
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# Secret 的名字，用于保存 ACME 账号的私钥
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privateKeySecretRef:
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name: letsencrypt-demo
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dns01:
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# 这里定义了一个列表，包含了 DNS-01 的相关内容，用于应对 DNS Challenge。
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providers:
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- name: your-dns
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route53:
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accessKeyID: <REDACTED>
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region: eu-central-1
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secretAccessKeySecretRef:
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name: prod-route53-credentials-secret
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key: secret-access-key
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</code></pre></li><li><p>如果使用的是 <code>route53</code> <a href=https://cert-manager.readthedocs.io/en/latest/tasks/acme/configuring-dns01/route53.html>Provider</a>，必须提供一个 Secret 来进行 DNS 的 ACME 验证。可以使用下面的配置来创建需要的 Secret：</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: v1
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kind: Secret
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metadata:
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name: prod-route53-credentials-secret
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type: Opaque
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data:
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secret-access-key: <REDACTED BASE64>
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</code></pre></li><li><p>创建自己的证书：</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: certmanager.k8s.io/v1alpha1
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kind: Certificate
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metadata:
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name: demo-certificate
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namespace: istio-system
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spec:
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acme:
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config:
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- dns01:
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provider: your-dns
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domains:
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- '*.mydemo.com'
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commonName: '*.mydemo.com'
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dnsNames:
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- '*.mydemo.com'
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issuerRef:
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kind: ClusterIssuer
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name: letsencrypt-demo
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secretName: istio-customingressgateway-certs
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</code></pre><p>记录一下 <code>secretName</code> 的值，后面会使用它。</p></li><li><p>要进行自动扩容，可以新建一个 HPA 对象：</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: autoscaling/v1
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kind: HorizontalPodAutoscaler
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metadata:
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name: my-ingressgateway
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namespace: istio-system
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spec:
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maxReplicas: 5
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minReplicas: 1
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scaleTargetRef:
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apiVersion: apps/v1beta1
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kind: Deployment
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name: my-ingressgateway
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targetCPUUtilizationPercentage: 80
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status:
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currentCPUUtilizationPercentage: 0
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currentReplicas: 1
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desiredReplicas: 1
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</code></pre></li><li><p>使用<a href=/v1.20/zh/blog/2019/custom-ingress-gateway/deployment-custom-ingress.yaml>附件 YAML 中的定义</a>进行部署。</p><div><aside class="callout tip"><div class=type><svg class="large-icon"><use xlink:href="/v1.20/img/icons.svg#callout-tip"/></svg></div><div class=content>其中类似 <code>aws-load-balancer-type</code> 这样的注解，只对 AWS 生效。</div></aside></div></li><li><p>创建您的服务：</p><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.20/img/icons.svg#callout-warning"/></svg></div><div class=content><code>NodePort</code> 需要是一个可用端口。</div></aside></div><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: v1
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kind: Service
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metadata:
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name: my-ingressgateway
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annotations:
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service.beta.kubernetes.io/aws-load-balancer-type: nlb
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labels:
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app: my-ingressgateway
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istio: my-ingressgateway
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spec:
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type: LoadBalancer
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selector:
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app: my-ingressgateway
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istio: my-ingressgateway
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ports:
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-
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name: http2
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nodePort: 32380
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port: 80
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targetPort: 80
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-
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name: https
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nodePort: 32390
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port: 443
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-
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name: tcp
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nodePort: 32400
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port: 31400
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</code></pre></li><li><p>创建您的自定义 Ingress 网关配置对象：</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: networking.istio.io/v1alpha3
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kind: Gateway
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metadata:
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annotations:
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name: istio-custom-gateway
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namespace: default
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spec:
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selector:
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istio: my-ingressgateway
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servers:
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- hosts:
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- '*.mydemo.com'
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port:
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name: http
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number: 80
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protocol: HTTP
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tls:
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httpsRedirect: true
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- hosts:
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- '*.mydemo.com'
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port:
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name: https
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number: 443
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protocol: HTTPS
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tls:
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mode: SIMPLE
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privateKey: /etc/istio/ingressgateway-certs/tls.key
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serverCertificate: /etc/istio/ingressgateway-certs/tls.crt
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</code></pre></li><li><p>使用 <code>VirtualService</code> 连接 <code>istio-custom-gateway</code>：</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: networking.istio.io/v1alpha3
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kind: VirtualService
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metadata:
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name: my-virtualservice
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spec:
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hosts:
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- "demo.mydemo.com"
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gateways:
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- istio-custom-gateway
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http:
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- route:
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- destination:
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host: my-demoapp
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</code></pre></li><li><p>服务器返回了正确的证书，并成功完成验证（<code>SSL certificate verify ok</code>）：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ curl -v `https://demo.mydemo.com`
|
||
Server certificate:
|
||
SSL certificate verify ok.
|
||
</code></pre></li></ol><p><strong>恭喜您！</strong> 现在您可以使用自定义的 <code>istio-custom-gateway</code> <a href=/v1.20/zh/docs/reference/config/networking/gateway/>网关</a>对象了。</p></div><nav class=pagenav><div class=left><a title="Istio 有了一个新的论坛。" href=/v1.20/zh/blog/2019/announcing-discuss.istio.io/ class=next-link><svg class="icon left-arrow"><use xlink:href="/v1.20/img/icons.svg#left-arrow"/></svg>Istio 论坛成立</a></div><div class=right></div></nav></article><footer class=footer><div class="footer-wrapper container-l"><div class="user-links footer-links"><a class=channel title='Istio 的代码在 GitHub 上开发' href=https://github.com/istio/community aria-label=GitHub><svg class="icon github"><use xlink:href="/v1.20/img/icons.svg#github"/></svg>
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