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We released version 2.2.0 of Rancher today, and we’re beyond excited. The latest release is the culmination of almost a year’s work and brings new features to the product that will make your Kubernetes installations more stable and easier to manage.
When we released Preview 1 in December and Preview 2 in February, we covered their features extensively in blog articles, meetups, videos, demos, and at industry events. I won’t make this an article that rehashes what others have already written, but in case you haven’t seen the features we’ve packed into this release, I’ll do a quick recap.
Rancher Global DNS
There’s a telco concept of the “last mile,” which is the final communications link between the infrastructure and the end user. If you’re all in on Kubernetes, then you’re using tools like CI/CD or some other automation to deploy workloads. Maybe it’s only for testing, or maybe your teams have full control over what they deploy.
DNS is the last mile for Kubernetes applications. No one wants to deploy an app via automation and then go manually add or change a DNS record.
Rancher Global DNS solves this by provisioning and maintaining an external DNS record that corresponds to the IP addresses of the Kubernetes Ingress for an application. This, by itself, isn’t a new concept, but Rancher will also do it for applications deployed to multiple clusters.
Imagine what this means. You can now deploy an app to as many clusters as you want and have DNS automatically update to point to the Ingress for that application on all of them.
Rancher Cluster BDR
This is probably my favorite feature in Rancher 2.2. I’m a huge fan of backup and disaster recovery (BDR) solutions. I’ve seen too many things fail, and when I know I have backups in place, failure isn’t a big deal. It’s just a part of the job.
When Rancher spins up a cluster on cloud compute instances, vSphere, or via the Custom option, it deploys Rancher Kubernetes Engine (RKE). That’s the CNCF-certified Kubernetes distribution that Rancher maintains.
Rancher 2.2 adds support for backup and restore of the etcd datastore directly into the Rancher UI/API and the Kubernetes API. It also adds support for S3-compatible storage as the endpoint, so you can immediately get your backups off of the hosts without using NFS.
When the unthinkable happens, you can restore those backups directly into the cluster via the UI.
You’ve already been making snapshots of your cluster data and moving them offsite, right? Of course you have.…but just in case you haven’t, it’s now so easy to do that there’s no reason not to do it.
Rancher Advanced Monitoring
Rancher has always used Prometheus for monitoring and alerts. This release enables Prometheus to reach even further into Kubernetes and deliver even more information back to you. One of the flagship features in Rancher is single cluster multi-tenancy, where one or more users have access to a Project and can only see the resources within that Project even if there are other users or other Projects on the cluster.
Rancher Advanced Monitoring deploys Prometheus and Grafana in a way that respects the boundaries of a multi-tenant environment. Grafana installs with pre-built cluster and Project dashboards, so once you check the box to activate the advanced metrics, you’ll be looking at useful graphs a few minutes later.
Rancher Advanced Monitoring covers everything from the cluster nodes to the Pods within each Project, and if your application exposes its own metrics, Prometheus will scrape those and make them available for you to use.
Rancher is built to manage multiple clusters. It has a strong integration with Helm via the Application Catalog, which takes Helm’s key/value YAML and turns it into a form that anyone can use.
In Rancher 2.2 the Application Catalog also exists at the Global level, and you can deploy apps via Helm simultaneously to multiple Projects in any number of clusters. This saves a tremendous amount of time for anyone who has to maintain applications in different environments, particularly when it’s time to upgrade all of those applications. Rancher will batch upgrades and rollbacks using Helm’s features for atomic releases.
Because multi-cluster apps are built on top of Helm, they’ll work out of the box with CI/CD systems or any other automated provisioner.
In earlier versions of Rancher the configuration for the Application Catalog and any external Helm repositories existed at the Global level and propagated to the clusters. This meant that every cluster had access to the same Helm charts, and while that worked for most installations, it didn’t work for all of them.
Rancher 2.2 has cluster-specific and project-specific configuration for the Application Catalog. You can remove it completely, change what a particular cluster or project has access to, or add new Helm repositories for applications that you’ve approved.
The latest version of Rancher gives you the tools that you need for “day two” Kubernetes operations -- those tasks that deal with the management and maintenance of your clusters after launch. Everything focuses on reliability, repeatability, and ease of use, because using Rancher is about helping your developers accelerate innovation and drive value for your business.
Rancher 2.2 is available now for deployment in dev and staging environments as
rancher/rancher:latest. Rancher recommends that production environments hold out for
rancher/rancher:stable before upgrading, and that tag will be available in the coming days.
If you haven’t yet deployed Rancher, now is a great time to start! With two easy steps you can have Rancher up and running, ready to help you manage Kubernetes.
Join the Rancher 2.2 Online Meetup on April 3rd
To kick off this release and explain in detail each of these new, powerful features, we’re hosting an Online Meetup on April 3rd. It’s free to join and there will be live Q&A with the engineers who directly worked on the project. Get your spot here.
Adrian has been online since 1986, when he first got his hands on a 300 baud modem for his C64. He fell in love with computers and started writing software in 1988, moving into Unix and Linux and launching a career building Internet infrastructure in 1996. Fluent in languages spoken by humans and computers alike, Adrian is a champion for Rancher and Kubernetes. He is passionate about automation and efficiency, and he loves to teach anyone who wants to learn about technology. When not pushing Kubernetes to its limits, you'll find him flying drones or working on his farm in the Chilean central valley.