For example, this might happen that few records may require additional columns, but those not required by other records in the same database. Etcd creates a database page for each record which do not hampers other records while updating one. It is different than traditional database which stores data in tabular form. Etcd is also useful to set up the desired state for the system.īy means of key-value store for Kubernetes etcd, it stores all configurations for Kubernetes clusters. The API server component in Kubernetes master nodes communicates with etcd the components spread across different clusters. Additionally, etcd allows Kubernetes master to support discovery service so that deployed application can declare their availability for inclusion in service. It acts like a backend service discovery and database, runs on different servers in Kubernetes clusters at the same time to monitor changes in clusters and to store state/configuration data that should to be accessed by a Kubernetes master or clusters. What is etcd in Kubernetes?Įtcd is a distributed reliable key-value store which is simple, fast and secure. To keep track of all changes and updates of these nodes and pass on the desired action, Kubernetes uses etcd. There can be ‘n’ number of worker nodes that can be distributed to handle pods. We all know Kubernetes is a distributed platform that orchestrates different worker nodes and can be controlled by central master nodes.
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