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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="/v1.24/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>宣布支持 1.8 到 1.10 的直接升级</h1><p>迈向更顺畅的升级过程。</p></div><p class=post-author>May 24, 2021 <span>| </span>作者 Mitch Connors - Google, Sam Naser - Google</p><div><p>随着 Service Mesh 技术从尖端转向稳定的基础架构，许多用户表示有兴趣减少升级他们的 Service Mesh 的频率，因为验证新的次要版本可能需要很多时间。对于跟不上新版本的用户来说，升级尤其困难，因为 Istio 不支持跨多个次要版本的升级。要升级 <code>1.6.x</code> 到 <code>1.8.x</code>，用户首先必须升级到 <code>1.7.x</code> 然后再到 <code>1.8.x</code>。</p><p>随着 Istio 1.10 的发布，我们宣布支持 Istio Alpha 级别的升级将直接从 <code>1.8.x</code> 升级到 <code>1.10.x</code>，而不升级到 <code>1.9.x</code>。我们希望这将减轻运行 Istio 的运营负担，与我们 2021 年改善 Day 2 Operations 的主题保持一致。</p><h2 id=从-18-升级到-110>从 1.8 升级到 1.10</h2><p>对于直接升级，我们建议使用金丝雀升级方法，以便在将工作负载切换到新版本之前验证控制平面功能。我们还将在本指南中使用<a href=/v1.24/zh/blog/2021/revision-tags/>修订标签</a>，这是对 1.10 中引入的金丝雀升级的改进，因此用户在升级时不必更改命名空间上的标签。</p><p>首先，使用版本 <code>1.10</code> 或更高版本的 <code>istioctl</code>，创建一个版本标签 <code>stable</code> ，指向现有的 <code>1.8</code> 版本。从现在开始，让我们假设这个修订版本叫做 <code>1-8-5</code>：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl x revision tag set stable --revision 1-8-5</code></pre><p>如果您的 1.8 安装没有相关的修订，我们可以使用以下命令创建此修订标记：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl x revision tag set stable --revision default</code></pre><p>现在，重新用 <code>istio.io/rev=stable</code> 标签标记以前标记为 <code>istio-injection=enabled</code> 或者 <code>istio.io/rev=<REVISION></code> 的名称空间。下载 Istio 1.10.0 版本并安装带有修订版的新控制平面：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl install --revision 1-10-0 -y</code></pre><p>现在评估 <code>1.10</code> 版本是否正确出现并且是健康的。一旦对新版本的稳定性感到满意，您可以将版本标签设置为新版本：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl x revision tag set stable --revision 1-10-0 --overwrite</code></pre><p>验证修订标签 <code>stable</code> 是否指向新的修订：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl x revision tag list
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TAG REVISION NAMESPACES
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stable 1-10-0 ...</code></pre><p>一旦准备好将现有工作负载转移到新的 1.10 版本，就必须重新启动工作负载，以便 sidecar 代理使用新的控制平面。我们可逐个遍历名空间，并将工作负载滚动到新版本：</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ kubectl rollout restart deployments -n …</code></pre><p>在将工作负载转移到新的 Istio 版本后，注意到了一个问题吗？没问题！因为您用的是金丝雀升级，旧的控制平面仍在运行，我们可以切换回去。</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ istioctl x revision tag set prod --revision 1-8-5</code></pre><p>然后在触发另一次部署后，您的工作负载将返回到旧版本。</p><p>我们期待听到您关于直接升级的体验，并期待在未来改进和扩展此功能。</p></div><div class=share-social><div class=heading>Share this post</div><div class=share-buttons><a href="https://www.linkedin.com/shareArticle?mini=true&url=%2fv1.24%2fzh%2fblog%2f2021%2fdirect-upgrade%2f" target=_blank><img class=share-icon src=/v1.24/img/social/linkedin.svg alt="Share to LinkedIn">
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