The yb-admin utility, located in the bin directory of YugabyteDB home, provides a command line interface for administering clusters.
Two of its many command options, list_all_masters and list_all_tablet_servers, allow us to view the current state and status of all nodes in a YugabytDB universe.
Examples:
[yugabyte@ip-172-150-18-175 bin]$ ./yb-admin -init_master_addrs 172.150.18.175 list_all_masters
Master UUID RPC Host/Port State Role
6487585620584914be19a6020c9c4bb3 172.152.28.57:7100 ALIVE LEADER
bc943815a7c4417fbd019aaed41be24a 172.150.18.175:7100 ALIVE FOLLOWER
ba4e8a778dd44b06a5f9b74a2ebd1ef3 172.152.40.51:7100 ALIVE FOLLOWER
[yugabyte@ip-172-150-18-175 bin]$ ./yb-admin -init_master_addrs 172.150.18.175 list_all_tablet_servers
Tablet Server UUID RPC Host/Port Heartbeat delay Status Reads/s Writes/s Uptime SST total size SST uncomp size SST #files Memory
84c813d1f37f4af884cd775e669431d0 172.150.18.175:9100 0.56s ALIVE 0.00 0.00 818 76.71 GB 166.28 GB 283 184.98 MB
41b9120f5f7044cc967432e5d3903edf 172.152.28.57:9100 0.59s ALIVE 0.00 0.00 816 340.24 GB 728.53 GB 337 1.06 GB
159d77ba6196481581b055e1040700bd 172.152.40.51:9100 0.06s ALIVE 0.00 0.00 822 340.16 GB 728.56 GB 349 1.13 GB
Have Fun!