Book Image

PostgreSQL 10 Administration Cookbook - Fourth Edition

By : Simon Riggs, Gianni Ciolli
Book Image

PostgreSQL 10 Administration Cookbook - Fourth Edition

By: Simon Riggs, Gianni Ciolli

Overview of this book

PostgreSQL is a powerful, open source database management system with an enviable reputation for high performance and stability. With many new features in its arsenal, PostgreSQL 10 allows users to scale up their PostgreSQL infrastructure. This book takes a step-by-step, recipe-based approach to effective PostgreSQL administration. Throughout this book, you will be introduced to these new features such as logical replication, native table partitioning, additional query parallelism, and much more. You will learn how to tackle a variety of problems that are basically the pain points for any database administrator - from creating tables to managing views, from improving performance to securing your database. More importantly, the book pays special attention to topics such as monitoring roles, backup, and recovery of your PostgreSQL 10 database, ensuring high availability, concurrency, and replication. By the end of this book, you will know everything you need to know to be the go-to PostgreSQL expert in your organization.
Table of Contents (14 chapters)

Mapping external usernames to database roles

In some cases, the authentication username is different from the PostgreSQL username. For instance, this can happen when using an external system for authentication, such as certificate authentication, as described in the previous recipe, or any other external or single sign-on system authentication method from http://www.postgresql.org/docs/current/static/auth-methods.html (GSSAPI, SSPI, Kerberos, Radius, or PAM). Or you may just need to enable an externally authenticated user to connect as multiple database users.

In such cases, you can specify rules to map the external username to the appropriate database role.

Getting ready

Prepare a list of usernames from the external authentication...