I’m not sure what happened but my etcd configuration stopped working. I recently acquired two Intel NUC devices and while they were a pain in the ass to configure the BIOS (I found this link and everything is all better from the boot)Next it was a matter of selecting the topology. This is normally an easy task but lately I have experienced a few bugs which I cannot explain. The one good news is that I have been able to try and try again.$ sudo rm -rf /var/lib/etcd2/proxy$ sudo systemctl stop etcd2$ sudo coreos-cloudinit –from-file ./cloud-config.yml$ sudo systemctl start etcd2$ sudo journalctl -f -u etcd2And then test the health of the system$ etcdctl –debug cluster-health But for some strange reason my proxy node (worker) seems to lose a healthy connection to the etcd leader.Mar 21 00:50:43 corenuc2 systemd[1]: Started etcd2.Mar 21 00:50:43 corenuc2 etcd2[4036]: proxy: listening for client requests on http://0.0.0.0:4001Mar 21 00:51:13 corenuc2 etcd2[4036]: could not get cluster response from http://0.0.0.0:2380: Get http://0.0.0.0:2380/members: dial tcp 0.0.0.0:2380: connection refusedMar 21 00:51:13 corenuc2 etcd2[4036]: proxy: could not retrieve cluster information from the given urlsMar 21 00:51:19 corenuc2 etcd2[4036]: proxy: zero endpoints currently availableMar 21 00:51:19 corenuc2 etcd2[4036]: proxy: zero endpoints currently availableMar 21 00:51:26 corenuc2 etcd2[4036]: proxy: zero endpoints currently availableMar 21 00:51:26 corenuc2 etcd2[4036]: proxy: zero endpoints currently availableMy SOLO etcd server:coreos:  etcd2:    name: etcdserver    initial-cluster: etcdserver=http://192.168.86.113:2380    listen-client-urls: http://127.0.0.1:2379,http://192.168.86.113:2379,http://127.0.0.1:4001,http://192.168.86.113:4001    #listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001    advertise-client-urls: http://192.168.86.113:2379    initial-advertise-peer-urls: http://192.168.86.113:2380     listen-peer-urls: http://192.168.86.113:2380,http://192.168.86.113:7001My worker with etcd configured as a proxycoreos:  etcd2:    proxy: on    name: etcdworker    initial-cluster: etcdserver=http://192.168.86.113:2380    listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001