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<button id=search-close title='Cancel search' type=reset aria-label='Cancel search'><svg class="icon menu-close"><use xlink:href="/v1.17/img/icons.svg#menu-close"/></svg></button></form></nav></header><div class=banner-container><a href=/v1.17/news/releases/1.17.x/announcing-1.17.3/ class=banner data-title="Latest Release-2023-06-06 00:00:00 +0000 UTC" data-period-start=1686009600000 data-period-end=1686614400000 data-max-impressions=3 data-timeout><div class=content><p>Istio 1.17.3 is now available! Click here to learn more</p></div><div class=frame></div></a></div><article class=post itemscope itemtype=http://schema.org/BlogPosting><div class=header-content><h1>Handling Docker Hub rate limiting</h1><p>How to ensure your clusters are not impacted by Docker Hub rate limiting.</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="/v1.17/img/icons.svg#callout-warning"/></svg></div><div class=content>This blog post was written assuming Istio 1.8, so some of this content may now be outdated.</div></aside></div><div><p>Since November 20th, 2020, Docker Hub has introduced <a href=https://www.docker.com/increase-rate-limits>rate limits</a> on image pulls.</p><p>Because Istio uses <a href=https://hub.docker.com/u/istio>Docker Hub</a> as the default registry, usage on a large cluster may lead
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to pods failing to startup due to exceeding rate limits. This can be especially problematic for Istio, as there is typically
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the Istio sidecar image alongside most pods in the cluster.</p><h2 id=mitigations>Mitigations</h2><p>Istio allows you to specify a custom docker registry which you can use to make container images be fetched from your private registry. This can be configured by passing <code>--set hub=<some-custom-registry></code> at installation time.</p><p>Istio provides official mirrors to <a href=https://gcr.io/istio-release>Google Container Registry</a>. This can be configured with <code>--set hub=gcr.io/istio-release</code>. This is available for Istio 1.5+.</p><p>Alternatively, you can copy the official Istio images to your own registry. This is especially useful if your cluster runs in an environment with a registry tailored for your use case (for example, on AWS you may want to mirror images to Amazon ECR) or you have air gapped security requirements where access to public registries is restricted. This can be done with the following script:</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="The inaugural conference for Istio will take place at the end of February." href=/v1.17/blog/2020/istiocon-2021/ class=next-link><svg class="icon left-arrow"><use xlink:href="/v1.17/img/icons.svg#left-arrow"/></svg>Join us for the first IstioCon in 2021!</a></div><div class=right><a title="Workload Local DNS resolution to simplify VM integration, multicluster, and more." href=/v1.17/blog/2020/dns-proxy/ class=next-link>Expanding into New Frontiers - Smart DNS Proxying in Istio<svg class="icon right-arrow"><use xlink:href="/v1.17/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='GitHub is where development takes place on Istio code' href=https://github.com/istio/community aria-label=GitHub><svg class="icon github"><use xlink:href="/v1.17/img/icons.svg#github"/></svg></a><a class=channel 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