etcdctl/check: create new check command for memory usage

Create a new command similar to check perf that can check the memory
consumption for putting different workloads on a given endpoint. If no endpoint
is provided, localhost will be used. Return user with a message that whether
there are enough memory for a given workload with pass or fail.

Fixed #9121

etcdctl/ctlv3/command/check.go

@@ -365,22 +365,15 @@ func newCheckDatascaleCommand(cmd *cobra.Command, args []string) {
  }
 
  bytesUsed := bytesAfter - bytesBefore
+ mbUsed := bytesUsed / (1024 * 1024)
 
- ok = true
  if len(s.ErrorDist) != 0 {
  fmt.Println("FAIL: too many errors")
  for k, v := range s.ErrorDist {
  fmt.Printf("FAIL: ERROR(%v) -> %d\n", k, v)
  }
- ok = false
- }
-
- mbUsed := bytesUsed / (1024 * 1024)
-
- if ok {
- fmt.Println(fmt.Sprintf("PASS: Approximate system memory used : %v MB.", strconv.FormatFloat(float64(mbUsed), 'f', 2, 64)))
- } else {
- fmt.Println("FAIL: Memory usage could not be determined.")
  os.Exit(ExitError)
+ } else {
+ fmt.Println(fmt.Sprintf("PASS: Approximate system memory used : %v MB.", strconv.FormatFloat(float64(mbUsed), 'f', 2, 64)))
  }
 }