--- title: "Calico version 0.16 released" source: "https://www.tigera.io/blog/calico-version-0-16-released/" --- [Technical Blog](https://www.tigera.io/category/technical-blog/) # Calico version 0.16 released By [Ed Harrison](https://www.tigera.io/blog/author/ed-harrison/) on Apr 20, 2015 • 2 min read As I said in my [post earlier this month](https://www.tigera.io/blog/moving-calico-to-a-distributed-data-store-using-etcd/), the Calico team has been upgrading Calico to use etcd as its underlying data store and API transport.  This provides the following benefits: - Easier integration for HA / multi-instance orchestrator plug-ins. - The ability to define richer and more flexible security policy. - Closer architectural alignment with our Docker (and other container) integration which already uses etcd as a datastore for some of its configuration. Last Monday, we merged our etcd changes into the master branch on GitHub and, since then, we’ve been putting the code through its paces, preparing updated documentation and packaging a new etcd based release.  This is now released as Calico version 0.16, which includes Debian packages of Calico using the etcd data store for Ubuntu 14.04. We’ve also updated our documentation, with more information about the [updated architecture](http://docs.projectcalico.org/en/latest/architecture.html) and the definition of the [data model](http://docs.projectcalico.org/en/latest/etcd-data-model.html). As always, if you have any questions please get in touch on our [mailing list](https://www.tigera.io/project-calico/community/), or via [GitHub](http://github.com/Metaswitch/calico/issues). [As noted in my previous post, we don’t support live upgrade between previous versions of Calico and version 0.16.  If you have an existing deployment that you want to move to the latest release, then please get in touch and we’ll help you through the process.]   [Open Source](https://www.tigera.io/tags/open-source/)[Release](https://www.tigera.io/tags/release/)[Project Calico](https://www.tigera.io/tags/project-calico/) ## Related posts [![What’s new in Calico: Spring 2026 Release](https://www.tigera.io/app/uploads/2026/06/Whats-New-in-Calico-NEW-TEMPLATE-2026.png)](https://www.tigera.io/blog/whats-new-in-calico-spring-2026-release/) [Company Blog](https://www.tigera.io/category/company-blog/) #### [What’s new in Calico: Spring 2026 Release](https://www.tigera.io/blog/whats-new-in-calico-spring-2026-release/) By [Veronika Smolik](https://www.tigera.io/blog/author/veronika-smolik/) on Jun 2, 2026 Kubernetes has come a long way since its debut in 2014. It’s gone from running a couple of containerized microservices to orchestrating fleets of production workloads spanning everything from AI agents to full scale VMs... [Read more](https://www.tigera.io/blog/whats-new-in-calico-spring-2026-release/) [![Kubernetes Operational Maturity: Secure and Resilient Cluster Federation with Cluster Mesh](https://www.tigera.io/app/uploads/2026/05/Kubernetes-Operational-Maturity-Secure-and-Resilient-Cluster-Federation-with-Cluster-Mesh.png)](https://www.tigera.io/blog/kubernetes-operational-maturity-secure-and-resilient-cluster-federation-with-cluster-mesh/) #### [Kubernetes Operational Maturity: Secure and Resilient Cluster Federation with Cluster Mesh](https://www.tigera.io/blog/kubernetes-operational-maturity-secure-and-resilient-cluster-federation-with-cluster-mesh/) By [Veronika Smolik](https://www.tigera.io/blog/author/veronika-smolik/) on May 25, 2026 Practically no one runs a single Kubernetes cluster in production these days. Maybe that’s how it started but data sovereignty requirements, acquisitions, AI initiatives and the need for edge servers, among other considerations, have pulled... [Read more](https://www.tigera.io/blog/kubernetes-operational-maturity-secure-and-resilient-cluster-federation-with-cluster-mesh/) [![What’s New in Calico v3.32](https://www.tigera.io/app/uploads/2026/05/Green-Please-use-a-different-background-color-alternately-1.png)](https://www.tigera.io/blog/whats-new-in-calico-v3-32/) #### [What’s New in Calico v3.32](https://www.tigera.io/blog/whats-new-in-calico-v3-32/) By [Reza Ramezanpour](https://www.tigera.io/blog/author/rezar/) on May 13, 2026 We’re excited to announce the release of Calico Open Source v3.32! 🎉 This release corresponds with Kubernetes v1.36 (Codename Haru) and it goes beyond just sharing a cat as the mascot of the release, it... [Read more](https://www.tigera.io/blog/whats-new-in-calico-v3-32/)