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tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Configuration Options</h1></header><h3 class="anchor anchorWithStickyNavbar_LWe7" id="egress-support">Egress Support<a href="#egress-support" class="hash-link" aria-label="Direct link to Egress Support" title="Direct link to Egress Support">​</a></h3><p>By default the Egress gateway is disabled, but can be enabled on install or upgrade through the values.yaml or via the <a href="#overlay-file">overlay file</a>.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="enabling-automatic-sidecar-injection">Enabling Automatic Sidecar Injection<a href="#enabling-automatic-sidecar-injection" class="hash-link" aria-label="Direct link to Enabling Automatic Sidecar Injection" title="Direct link to Enabling Automatic Sidecar Injection">​</a></h3><p>Automatic sidecar injection is disabled by default. To enable this, set the <code>sidecarInjectorWebhook.enableNamespacesByDefault=true</code> in the values.yaml on install or upgrade. This automatically enables Istio sidecar injection into all new namespaces that are deployed.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="overlay-file">Overlay File<a href="#overlay-file" class="hash-link" aria-label="Direct link to Overlay File" title="Direct link to Overlay File">​</a></h3><p>An Overlay File is designed to support extensive configuration of your Istio installation. It allows you to make changes to any values available in the <a href="https://istio.io/latest/docs/reference/config/istio.operator.v1alpha1/" target="_blank" rel="noopener noreferrer">IstioOperator API</a>. This will ensure you can customize the default installation to fit any scenario.</p><p>The Overlay File will add configuration on top of the default installation that is provided from the Istio chart installation. This means you do not need to redefine the components that already defined for installation.</p><p>For more information on Overlay Files, refer to the <a href="https://istio.io/latest/docs/setup/install/istioctl/#configure-component-settings" target="_blank" rel="noopener noreferrer">Istio documentation.</a></p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="selectors-and-scrape-configs">Selectors and Scrape Configs<a href="#selectors-and-scrape-configs" class="hash-link" aria-label="Direct link to Selectors and Scrape Configs" title="Direct link to Selectors and Scrape Configs">​</a></h3><p>The Monitoring app sets <code>prometheus.prometheusSpec.ignoreNamespaceSelectors=false</code> which enables monitoring across all namespaces by default. This ensures you can view traffic, metrics and graphs for resources deployed in a namespace with <code>istio-injection=enabled</code> label.</p><p>If you would like to limit Prometheus to specific namespaces, set <code>prometheus.prometheusSpec.ignoreNamespaceSelectors=true</code>. Once you do this, you must perform some additional configuration to continue to monitor your resources.</p><p>For details, refer to <a href="/integrations-in-rancher/istio/configuration-options/selectors-and-scrape-configurations">this section.</a></p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="enable-istio-with-pod-security-policies">Enable Istio with Pod Security Policies<a href="#enable-istio-with-pod-security-policies" class="hash-link" aria-label="Direct link to Enable Istio with Pod Security Policies" title="Direct link to Enable Istio with Pod Security Policies">​</a></h3><p>Refer to <a href="/integrations-in-rancher/istio/configuration-options/pod-security-policies">this section.</a></p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="additional-steps-for-installing-istio-on-an-rke2-cluster">Additional Steps for Installing Istio on an RKE2 Cluster<a href="#additional-steps-for-installing-istio-on-an-rke2-cluster" class="hash-link" aria-label="Direct link to Additional Steps for Installing Istio on an RKE2 Cluster" title="Direct link to Additional Steps for Installing Istio on an RKE2 Cluster">​</a></h3><p>Refer to <a href="/integrations-in-rancher/istio/configuration-options/install-istio-on-rke2-cluster">this section.</a></p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="additional-steps-for-project-network-isolation">Additional Steps for Project Network Isolation<a href="#additional-steps-for-project-network-isolation" class="hash-link" aria-label="Direct link to Additional Steps for Project Network Isolation" title="Direct link to Additional Steps for Project Network Isolation">​</a></h3><p>Refer to <a href="/integrations-in-rancher/istio/configuration-options/project-network-isolation">this section.</a></p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/rancher/rancher-docs/edit/main/docs/pages-for-subheaders/configuration-options.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"><span class="theme-last-updated">Last updated<!-- --> on <b><time datetime="2023-12-06T23:35:48.000Z">Dec 6, 2023</time></b></span></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/integrations-in-rancher/istio/disable-istio"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Disabling Istio</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/integrations-in-rancher/istio/configuration-options/pod-security-policies"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Enable Istio with Pod Security Policies</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#egress-support" class="table-of-contents__link toc-highlight">Egress Support</a></li><li><a href="#enabling-automatic-sidecar-injection" class="table-of-contents__link toc-highlight">Enabling Automatic Sidecar Injection</a></li><li><a href="#overlay-file" class="table-of-contents__link toc-highlight">Overlay File</a></li><li><a href="#selectors-and-scrape-configs" class="table-of-contents__link toc-highlight">Selectors and Scrape Configs</a></li><li><a href="#enable-istio-with-pod-security-policies" class="table-of-contents__link toc-highlight">Enable Istio with Pod Security Policies</a></li><li><a href="#additional-steps-for-installing-istio-on-an-rke2-cluster" class="table-of-contents__link toc-highlight">Additional Steps for Installing Istio on an RKE2 Cluster</a></li><li><a href="#additional-steps-for-project-network-isolation" class="table-of-contents__link toc-highlight">Additional Steps for Project Network Isolation</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2024 SUSE Rancher. 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