--- title: Implement mTLS and zero trust with cert-manager and... description: Red Hat has released cert-manager operator version 1.19 for OpenShift, introducing trust-manager as a technology preview. Trust-manager is an add-on controller... canonical: https://daily.dev/posts/implement-mtls-and-zero-trust-with-cert-manager-and-trust-manager-1ul1ddtsk twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Implement mTLS and zero trust with cert-manager and trust-manager | daily.dev og:description: Red Hat has released cert-manager operator version 1.19 for OpenShift, introducing trust-manager as a technology preview. Trust-manager is an add-on controller... og:url: https://daily.dev/posts/implement-mtls-and-zero-trust-with-cert-manager-and-trust-manager-1ul1ddtsk og:image: https://api.daily.dev/og/posts/1Ul1Ddtsk.png og:image:alt: Implement mTLS and zero trust with cert-manager and trust-manager og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Implement mTLS and zero trust with cert-manager and trust-manager **[Red Hat Developer](https://daily.dev/sources/rhdev)** · 12 min read · 0 upvotes · 0 comments ## Summary Red Hat has released cert-manager operator version 1.19 for OpenShift, introducing trust-manager as a technology preview. Trust-manager is an add-on controller that automates the construction, distribution, and rotation of CA trust bundles across Kubernetes namespaces. Combined with cert-manager's TLS certificate lifecycle management, the two tools enable full mTLS automation at scale. The post explains TLS vs mTLS handshake mechanics, how trust-manager's Bundle custom resource works, and how enterprises can use both tools to implement zero trust principles — including shorter certificate lifespans, least-privilege trust bundles per namespace, and automated CA rotation without manual toil. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [How to manage TLS certificates used by OpenShift GitOps operator](https://daily.dev/posts/how-to-manage-tls-certificates-used-by-openshift-gitops-operator-ovuaw2aj0) · Red Hat Developer · 0 upvotes · 0 comments - [Automate certificate management in OpenShift](https://daily.dev/posts/automate-certificate-management-in-openshift-sovd0s6dd) · Red Hat Developer · 1 upvotes · 0 comments --- Tags: [#kubernetes](https://daily.dev/tags/kubernetes) [View this post on daily.dev](https://daily.dev/posts/implement-mtls-and-zero-trust-with-cert-manager-and-trust-manager-1ul1ddtsk) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Implement mTLS and zero trust with cert-manager and trust-manager","url":"https://daily.dev/posts/implement-mtls-and-zero-trust-with-cert-manager-and-trust-manager-1ul1ddtsk","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/implement-mtls-and-zero-trust-with-cert-manager-and-trust-manager-1ul1ddtsk"},"datePublished":"2026-06-25T07:47:19.646Z","dateModified":"2026-06-25T07:47:42.724Z","description":"Red Hat has released cert-manager operator version 1.19 for OpenShift, introducing trust-manager as a technology preview. 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