Bootstrapping the etcd Cluster

Kubernetes components are stateless and store cluster state in etcd. In this lab you will bootstrap a single node etcd cluster.

Prerequisites

Copy etcd binaries and systemd unit files to the controlplane machine:

scp \
  downloads/controller/etcd \
  downloads/client/etcdctl \
  units/etcd.service \
  vagrant@controlplane:~/

The commands in this lab must be run on the controlplane machine. Login to the controlplane machine using the ssh command. Example:

ssh vagrant@controlplane

Extract and install the etcd server and the etcdctl command line utility:

{
  sudo mv etcd etcdctl /usr/local/bin/
}

{
  sudo mkdir -p /etc/etcd /var/lib/etcd
  sudo chmod 700 /var/lib/etcd
  sudo cp ca.crt kube-apiserver.key kube-apiserver.crt \
    /etc/etcd/
}

Each etcd member must have a unique name within an etcd cluster. Set the etcd name to match the hostname of the current compute instance:

Create the etcd.service systemd unit file:

sudo mv etcd.service /etc/systemd/system/

{
  sudo systemctl daemon-reload
  sudo systemctl enable etcd
  sudo systemctl start etcd.service
}

List the etcd cluster members:

etcdctl member list

6702b0a34e2cfd39, started, controller, http://127.0.0.1:2380, http://127.0.0.1:2379, false