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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>处理 Docker Hub 速率限制</h1><p>如何确保您的集群不受 Docker Hub 速率限制的影响。</p></div><p class=post-author>Dec 7, 2020 <span>| </span>By John Howard - Google</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 1.8 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>从 2020 年 11 月 20 日开始,Docker Hub 在镜像拉取中引入了<a href=https://www.docker.com/increase-rate-limits>速率限制</a>。</p><p>因为 Istio 使用 <a href=https://hub.docker.com/u/istio>Docker Hub</a> 作为默认镜像仓库,所以在大型集群上使用可能会由于超出速率限制导致 Pod 无法启动。这对 Istio 来说有很大问题,因为通常 Istio 的 sidecar 镜像与集群中的大多数 Pod 是一起启动的。</p><h2 id=mitigation>防范</h2><p>Istio 允许您指定一个自定义 docker 镜像仓库,可用于从您的私有仓库中获取容器镜像。在安装时通过 <code>--set hub=<some-custom-registry></code> 来配置。</p><p>Istio 在 <a href=https://gcr.io/istio-release>Google 容器仓库</a> 提供了官方镜像。可以通过 <code>--set hub=gcr.io/istio-release</code> 来配置。这适用于 Istio 1.5 及以上版本。</p><p>或者,您可以将 Istio 官方镜像拷贝到您自己的镜像仓库中。根据您的使用场景,如果您的集群运行在特定镜像仓库的环境中(例如,在 AWS 上,您可能希望将镜像映射到 Amazon ECR),或者您对安全性有严格的要求(对公共仓库的访问受限制),则此操作特别有用。您可以使用以下脚本完成此操作:</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ SOURCE_HUB=istio
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$ DEST_HUB=my-registry # Replace this with the destination hub
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$ IMAGES=( install-cni operator pilot proxyv2 ) # Images to mirror.
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$ VERSIONS=( 1.7.5 1.8.0 ) # Versions to copy
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$ VARIANTS=( "" "-distroless" ) # Variants to copy
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$ for image in $IMAGES; do
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$ for version in $VERSIONS; do
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$ for variant in $VARIANTS; do
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$ name=$image:$version$variant
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$ docker pull $SOURCE_HUB/$name
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$ docker tag $SOURCE_HUB/$name $DEST_HUB/$name
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$ docker push $DEST_HUB/$name
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$ docker rmi $SOURCE_HUB/$name
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$ docker rmi $DEST_HUB/$name
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$ done
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$ done
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$ done
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</code></pre></div><nav class=pagenav><div class=left><a title="Istio 成立大会将于 2 月底举行。" href=/v1.20/zh/blog/2020/istiocon-2021/ class=next-link><svg class="icon left-arrow"><use xlink:href="/v1.20/img/icons.svg#left-arrow"/></svg>加入我们,参加 2021 年的第一届 IstioCon!</a></div><div class=right><a title="宣布 4 名最新的 Istio 指导委员会成员。" href=/v1.20/zh/blog/2020/steering-election-results/ class=next-link>2020 年指导委员会选举结果<svg class="icon right-arrow"><use xlink:href="/v1.20/img/icons.svg#right-arrow"/></svg></a></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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