Google Introduces Support for Heterogeneous Container Clusters
Customers of Google Container Engine now have the ability to set up container clusters with nodes of varying configurations within them.
Making the support for heterogeneous clusters possible is a new feature in Container Engine called node pools, which Google moved from testing into general availability this week.
In a blog post, Fabio Yeon, software engineer at Google's Cloud Platform group, described a node pool as a collection of machines with the same features and configuration within a cluster. The feature allows users to set up container clusters with multiple pools each one running machines with different configurations.
"Now instead of a uniform cluster where all the nodes are the same, you can have multiple node pools that better suit your needs," Yeon said. For example, an organization that wants more CPU performance from an existing cluster can simply add a node pool with bigger machines to it, instead of having to set up a new cluster entirely to achieve the same goal.
Node pools will allow customers of Google Container Engine to set up multiple nodes in one cluster.
Node pools offer other benefits as well, according to Yeon. For instance, they give administrators a way to exercise more control when upgrading nodes in a cluster to the latest version of Kubernetes, Google's cluster management software. When a new version of Kubernetes becomes available, administrators can now simply set up a new node in an existing cluster and have it automatically updated to the latest version of Kubernetes by the cluster master software.