This chapter has introduced you to the extension ecosystem, a very rich and powerful system to package related objects and manage them as a single unit. Extensions provide a way to add new features to your cluster and your databases and most notably provide a clear and concise way of building updates and repeatable installation, therefore easing the distribution of the features to other clusters and databases.
Thanks to the PGXS building infrastructure, creating an extension from scratch is comprehensive and quite easy, while thanks to tools such as pgxnclient, managing a lot of extensions can be automated.
In the next chapter, you will learn how to take care of the status and performance of your cluster.
