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Canonical Introduces High-Availability Micro-Kubernetes

Published by Slashdot on Fri, 16 Oct 2020


An anonymous reader quotes a report from ZDNet: If you've been hiding under a rock -- and who could blame you these days' -- you may have missed how totally Kubernetes now dominates container orchestration. One way to quickly get up to speed on Kubernetes is with Canonical's MicroK8s. This is an easy-to-run and install mini-version of Kubernetes. And now Canonical has added autonomous high availability (HA) clustering to it. [...] Now, with HA, MicroK8s is ready to move from Internet of Things (IoT) implementations, testing out Kubernetes implementations on a workstation, or simply learning Kubernetes to bigger, better cloud jobs. With the new MicroK8s release, HA is enabled automatically once three or more nodes are clustered, and the data store migrates automatically between nodes to maintain a quorum in the event of a failure. Designed as a minimal conformant Kubernetes, MicroK8s installs, and clusters easily on Linux, macOS, or Windows. To work, a HA Kubernetes cluster needs three elements. Here's how it works in MicroK8s: -There must be more than one worker node. Since MicroK8s uses every node as a worker node, there is always another worker available so long as there's more than one node in the cluster. -The Kubernetes API services must run on one or more nodes so that losing a single node would not render the cluster inoperable. Every node in the MicroK8s cluster is an API server, which simplifies load-balancing and means we can switch instantaneously to a different API endpoint if one fails. -The cluster state must be in a reliable datastore. By default, MicroK8s uses Dqlite, a high-availability SQLite, as its datastore.Read more of this story at Slashdot.
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