https://cbonte.github.io/haproxy-dconv/2.5/configuration.html#7.3.6

https://stackoverflow.com/a/51065175

stats socket /var/lib/haproxy/stats


bash#> echo "show table" | socat unix-connect:/var/lib/haproxy/stats stdio
# table: BACKEND_NAME, type: binary, size:20971520, used:2

bash#>echo "show table BACKEND_NAME" | socat unix-connect:/var/lib/haproxy/stats stdio
# table: BACKEND_NAME, type: binary, size:20971520, used:2
0x7f9ca0f24314:
key=8A3DF855010388A4DD94F71E0FEAF7A54A7032EA56D477D20F59B4F28CEF183B use=0
exp=1264499 server_id=1
0x7f9ca0f245c4:
key=C7EA05BA85730EAF725035EFB3C4F7537FCCCFD0469FB45A4A2DE85308ECF1C7 use=0
exp=1696667 server_id=2