#219 - add fixes for @samzhang111 super token

Author: mcdan

collector/fixtures/e2e-output.txt

@@ -713,6 +713,7 @@ node_load5 0.37
 # HELP node_md_blocks Total number of blocks on device.
 # TYPE node_md_blocks gauge
 node_md_blocks{device="md0"} 248896
+node_md_blocks{device="md00"} 4.186624e+06
 node_md_blocks{device="md10"} 3.14159265e+08
 node_md_blocks{device="md11"} 4.190208e+06
 node_md_blocks{device="md12"} 3.886394368e+09
@@ -727,6 +728,7 @@ node_md_blocks{device="md9"} 523968
 # HELP node_md_blocks_synced Number of blocks synced on device.
 # TYPE node_md_blocks_synced gauge
 node_md_blocks_synced{device="md0"} 248896
+node_md_blocks_synced{device="md00"} 4.186624e+06
 node_md_blocks_synced{device="md10"} 3.14159265e+08
 node_md_blocks_synced{device="md11"} 4.190208e+06
 node_md_blocks_synced{device="md12"} 3.886394368e+09
@@ -741,6 +743,7 @@ node_md_blocks_synced{device="md9"} 523968
 # HELP node_md_disks Total number of disks of device.
 # TYPE node_md_disks gauge
 node_md_disks{device="md0"} 2
+node_md_disks{device="md00"} 1
 node_md_disks{device="md10"} 2
 node_md_disks{device="md11"} 2
 node_md_disks{device="md12"} 2
@@ -755,6 +758,7 @@ node_md_disks{device="md9"} 4
 # HELP node_md_disks_active Number of active disks of device.
 # TYPE node_md_disks_active gauge
 node_md_disks_active{device="md0"} 2
+node_md_disks_active{device="md00"} 1
 node_md_disks_active{device="md10"} 2
 node_md_disks_active{device="md11"} 2
 node_md_disks_active{device="md12"} 2
@@ -769,6 +773,7 @@ node_md_disks_active{device="md9"} 4
 # HELP node_md_is_active Indicator whether the md-device is active or not.
 # TYPE node_md_is_active gauge
 node_md_is_active{device="md0"} 1
+node_md_is_active{device="md00"} 1
 node_md_is_active{device="md10"} 1
 node_md_is_active{device="md11"} 1
 node_md_is_active{device="md12"} 1

collector/fixtures/proc/mdstat

@@ -40,4 +40,7 @@ md12 : active raid0 sdc2[0] sdd2[1]
 md219 : inactive sdb[2](S) sdc[1](S) sda[0](S)
     7932 blocks super external:imsm
 
+md00 : active raid0 xvdb[0]
+      4186624 blocks super 1.2 256k chunks
+
 unused devices: <none>

collector/mdadm_linux.go

@@ -28,9 +28,9 @@ import (
 )
 
 var (
-	statuslineRE = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[[U_]+\]`)
-	raid0lineRE  = regexp.MustCompile(`(\d+) blocks .*\d+k chunks`)
-	buildlineRE  = regexp.MustCompile(`\((\d+)/\d+\)`)
+	statuslineRE           = regexp.MustCompile(`(\d+) blocks .*\[(\d+)/(\d+)\] \[[U_]+\]`)
+	raid0lineRE            = regexp.MustCompile(`(\d+) blocks( super ([0-9\.])*)? \d+k chunks`)
+	buildlineRE            = regexp.MustCompile(`\((\d+)/\d+\)`)
 	unknownPersonalityLine = regexp.MustCompile(`(\d+) blocks (.*)`)
 	raidPersonalityRE      = regexp.MustCompile(`raid[0-9]+`)
 )
@@ -82,7 +82,7 @@ func evalStatusline(statusline string) (active, total, size int64, err error) {
 func evalRaid0line(statusline string) (size int64, err error) {
 	matches := raid0lineRE.FindStringSubmatch(statusline)
 
-	if len(matches) != 2 {
+	if len(matches) < 2 {
 		return 0, fmt.Errorf("invalid raid0 status line: %s", statusline)
 	}
 
@@ -179,6 +179,7 @@ func parseMdstat(mdStatusFilePath string) ([]mdStatus, error) {
 		for _, possiblePersonality := range mainLine {
 			if raidPersonalityRE.MatchString(possiblePersonality) {
 				personality = possiblePersonality
+				// break
 			}
 		}
 

collector/mdadm_linux_test.go

@@ -25,6 +25,7 @@ func TestMdadm(t *testing.T) {
 	}
 
 	refs := map[string]mdStatus{
+		// { "<name>", <active?>, <numDisksActive>, <totalNumDisks>, <amountSynced>, <totalSize>}
 		"md3":   {"md3", true, 8, 8, 5853468288, 5853468288},
 		"md127": {"md127", true, 2, 2, 312319552, 312319552},
 		"md0":   {"md0", true, 2, 2, 248896, 248896},
@@ -37,6 +38,7 @@ func TestMdadm(t *testing.T) {
 		"md11":  {"md11", true, 2, 2, 4190208, 4190208},
 		"md12":  {"md12", true, 2, 2, 3886394368, 3886394368},
 		"md219": {"md219", false, 2, 2, 7932, 7932},
+		"md00":  {"md00", true, 1, 1, 4186624, 4186624},
 	}
 
 	for _, md := range mdStates {