etcd, https://coreos.com/etcd/, is a distributed key/value store and contains all details about a kubernetes cluster, such as resources and their states. How etcd is installed I install kubernetes, and etcd along with it, using kubespray https://github.com/kubernetes-incubator/kubespray Interacting with etcd etcd runs as a container. The startup script used by systemctl is /usr/local/bin/etcd, which has the contents below #!/bin/bash /usr/bin/docker run \ --restart=on-failure:5 \ --env-file=/etc/etcd.env \ --net=host \ -v /etc/ssl/certs:/etc/ssl/certs:ro \ -v /etc/ssl/etcd/ssl:/etc/ssl/etcd/ssl:ro \ -v /var/lib/etcd:/var/lib/etcd:rw \ --memory=512M \ --blkio-weight=1000 \ --name=etcd1 \ quay.io/coreos/etcd:v3.2.18 \ /usr/local/bin/etcd \ "$@" Interacting with the running etcd process......

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