kubespray/roles/etcd/templates/systemd-etcd2.service.j2

[Unit]
Description=etcd2
Conflicts=etcd.service

[Service]
User=etcd
Environment=ETCD_DATA_DIR=/var/lib/etcd2
Environment=ETCD_NAME=%m
ExecStart={{ bin_dir }}/etcd2
Restart=always
RestartSec=10s
LimitNOFILE=40000

[Install]
WantedBy=multi-user.target