In the previous chapter, we introduced Docker Compose, a tool that allows us to work with multi-service applications that are defined in a declarative way on a single Docker host.
This chapter introduces the concept of orchestrators. It teaches why orchestrators are needed and how they work conceptually. This chapter will also provide an overview of the most popular orchestrators and names a few of their pros and cons.
In this chapter, we will cover the following topics:
- What are orchestrators and why do we need them?
- The tasks of an orchestrator
- Overview of popular orchestrators
After finishing this chapter you will be able to:
- Name three to four tasks an orchestrator is responsible for
- List two to three of the most popular orchestrators
- Explain to an interested layman in your own words and with appropriate analogies why we need container orchestrators