# etcd --version
etcd Version: 3.3.11
Git SHA: 2cf9e51
Go Version: go1.10.3
Go OS/Arch: linux/amd64

[root@ceph-01 etc]# systemctl status etcd
● etcd.service - Etcd Server
   Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2020-11-23 18:00:03 CET; 1 weeks 2 days ago
 Main PID: 62963 (etcd)
    Tasks: 75
   Memory: 31.7M
   CGroup: /system.slice/etcd.service
           └─62963 /usr/bin/etcd --name=ceph-01 --data-dir=/var/lib/etcd/ceph.etcd --listen-client-urls=http://localhost:2379,http://10.4...

[root@ceph-01 etc]# systemctl cat etcd
# /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
User=etcd
# set GOMAXPROCS to number of processors
ExecStart=/bin/bash -c "GOMAXPROCS=$(nproc) /usr/bin/etcd --name=\"${ETCD_NAME}\" --data-dir=\"${ETCD_DATA_DIR}\" --listen-client-urls=\"${E
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

[root@ceph-01 etc]# journalctl -u etcd
-- No entries --