What is etcd3?

The etcd3 data model indexes all keys over a flat binary key space. This differs from other key-value store systems that use a hierarchical system of organizing keys into directories. Instead of listing keys by directory, keys are listed by key intervals [a, b) .

What is etcd stands for?

“Etcd” stands for “/etc distributed”; it is meant to be a highly reliable configuration mechanism that provides a uniform view across a cluster of machines. It offers “sequential consistency,” meaning that changes are visible in the same order on all machines — though not necessarily at the same time.

Why is it called etcd?

The name “etcd” originated from two ideas, the unix “/etc” folder and “d”istributed systems. The “/etc” folder is a place to store configuration data for a single system whereas etcd stores configuration information for large scale distributed systems. Hence, a “d”istributed “/etc” is “etcd”.

What is etcd written in?

Go
etcd is written in Go and uses the Raft consensus algorithm to manage a highly-available replicated log.

Is etcd a NoSQL database?

There are more than 225 different NoSQL databases, including the more well known open source projects such as Cassandra, Redis, and Etcd, cloud-based versions such as Amazon Web Services DynamoDB, and proprietary products such as Oracle NoSQL.

Why is there etcd in Kubernetes?

Kubernetes uses etcd to store all its data – its configuration data, its state, and its metadata. Kubernetes is a distributed system, so it needs a distributed data store like etcd. etcd lets any of the nodes in the Kubernetes cluster read and write data.

Does Kubernetes use etcd?

What is etcd good for?

etcd is an open source distributed key-value store used to hold and manage the critical information that distributed systems need to keep running. Most notably, it manages the configuration data, state data, and metadata for Kubernetes, the popular container orchestration platform.

How do you pronounce etcd?

etcd (pronounced et-see-dee) is an open source, distributed, consistent key-value store for shared configuration, service discovery, and scheduler coordination of distributed systems or clusters of machines.

Why does Kubernetes use etcd?

Is etcd like Redis?

etcd cannot be stored in memory(ram) they can only be persisted in disk storage, whereas redis can be cached in ram and can also be persisted in disk. etcd does not have various data types. It is made to store only kubernetes objects. But redis and other key-value stores have data-type flexibility.

Can Kubernetes run without etcd?

Kubernetes uses etcd to store all its data – its configuration data, its state, and its metadata. Kubernetes is a distributed system, so it needs a distributed data store like etcd. etcd lets any of the nodes in the Kubernetes cluster read and write data. I’ve also expanded on this article in this Quora answer.