SNMP Custom Plugins

[giovanniesposito (Giovanni)]

Hello,
i wrote a custom plugins to detect disk status from asustor nas. I get data only if i start via command line.
I have to start it once via
cmk --debug -nvI --detect-plugins asustor_disks NAS

where i get:
SUCCESS - Found 3 services, no new host labels

then i give:
cmk --debug -nv --detect-plugins asustor_disks NAS

and i get:

• PARSE FETCHER RESULTS
  Received no piggyback data
  Asustor_Disk 1 WDC WD40EFRX-68N32N0 is Healthy.
  Asustor_Disk 2 WDC WD40EFRX-68N32N0 is Healthy.
  Asustor_Disk 3 WDC WD40EFRX-68WT0N0 is Healthy.

after this, if i perform a full scan in WATO i get no response.

anyone could help me on this?

the script is really basic:
#!/usr/bin/env python3

-- coding: utf-8 --

def check_asustor_disks(item, _no_params, info):
for disk_id, disk_bay, disk_model, disk_type, disk_status, disk_temperature in info[0]:
if disk_id == item:
if disk_status == “Healthy”:
state = 0
elif disk_status == “Normal”:
state = 0
elif disk_status in [ “Risky”, “Dangerous”, “Bad” ]:
state = 2
# Any state we don’t know.
else:
state = 3
msg = “%s is %s.” % (disk_model, disk_status)

return (state, "%s " % (msg))

        yield state, "%s " % (msg)

return (3, "UNKW - Error")

def inventory_asustor_disks(info):
inventory = []
for disk_id, disk_bay, disk_model, disk_type, disk_status, disk_temperature in info[0]:
yield disk_id, None

check_info[“asustor_disks”] = {
“inventory_function”: inventory_asustor_disks,
“check_function”: check_asustor_disks,
“service_description”: “Asustor_Disk %s”,
“snmp_scan_function”: lambda oid: oid(".1.3.6.1.2.1.1.2.0").startswith(".1.3.6.1.4.1.44738.4"),
“snmp_info”: [(
“.1.3.6.1.4.1.44738.4.1.1”,
[
“1”, # disk index
“2”, # disk bay
“3”, # disk model
“4”, # disk type
“5”, # disk status
“6”, # disk temperature
])
]
}

[andreas-doehler (Andreas)]

Please can you post the code inside a preformatted text block?
For your discovery problem it is possible that the “snmp_scan_function” does not find anything.

[giovanniesposito (Giovanni)]

Thanks for your answer.

below the output of snmpwalk on the oid i used inside the script and below the code preformatted

how can i debug the snmp_scan_function?

snmpwalk -On -v2c -c public 192.168.100.250 .1.3.6.1.4.1.44738.4
.1.3.6.1.4.1.44738.4.1.1.1.1 = INTEGER: 1
.1.3.6.1.4.1.44738.4.1.1.1.2 = INTEGER: 2
.1.3.6.1.4.1.44738.4.1.1.1.3 = INTEGER: 3
.1.3.6.1.4.1.44738.4.1.1.2.1 = STRING: "Disk1"
.1.3.6.1.4.1.44738.4.1.1.2.2 = STRING: "Disk2"
.1.3.6.1.4.1.44738.4.1.1.2.3 = STRING: "Disk3"
.1.3.6.1.4.1.44738.4.1.1.3.1 = STRING: "WDC WD40EFRX-68N32N0"
.1.3.6.1.4.1.44738.4.1.1.3.2 = STRING: "WDC WD40EFRX-68N32N0"
.1.3.6.1.4.1.44738.4.1.1.3.3 = STRING: "WDC WD40EFRX-68WT0N0"
.1.3.6.1.4.1.44738.4.1.1.4.1 = STRING: "SATA"
.1.3.6.1.4.1.44738.4.1.1.4.2 = STRING: "SATA"
.1.3.6.1.4.1.44738.4.1.1.4.3 = STRING: "SATA"
.1.3.6.1.4.1.44738.4.1.1.5.1 = STRING: "Healthy"
.1.3.6.1.4.1.44738.4.1.1.5.2 = STRING: "Healthy"
.1.3.6.1.4.1.44738.4.1.1.5.3 = STRING: "Healthy"
.1.3.6.1.4.1.44738.4.1.1.6.1 = INTEGER: 44
.1.3.6.1.4.1.44738.4.1.1.6.2 = INTEGER: 43
.1.3.6.1.4.1.44738.4.1.1.6.3 = INTEGER: 42

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

def check_asustor_disks(item, _no_params, info):
    for disk_id, disk_bay, disk_model, disk_type, disk_status, disk_temperature in info[0]:
        if disk_id == item:
            if disk_status == "Healthy":
                state = 0
            elif disk_status == "Normal":
                state = 0
            elif disk_status in [ "Risky", "Dangerous", "Bad" ]:
                state = 2
            # Any state we don't know.
            else:
                state = 3
            msg = "%s is %s." % (disk_model, disk_status)
#           return (state, "%s " % (msg))
            yield state, "%s " % (msg)

    return (3, "UNKW - Problemi nel recupero dei dati sui dischi")

def inventory_asustor_disks(info):
    inventory = []
    for disk_id, disk_bay, disk_model, disk_type, disk_status, disk_temperature in info[0]:
         yield disk_id, None
 
check_info["asustor_disks"] = {
    "inventory_function": inventory_asustor_disks,
    "check_function": check_asustor_disks,
    "service_description": "Asustor_Disk %s",
    "snmp_scan_function": lambda oid: oid(".1.3.6.1.2.1.1.2.0").startswith(".1.3.6.1.4.1.44738.4"),
    "snmp_info": [(
        ".1.3.6.1.4.1.44738.4.1.1",
        [
          "1", # disk index
          "2", # disk bay
          "3", # disk model
          "4", # disk type
          "5", # disk status
          "6", # disk temperature
        ])
                 ]
}

[giovanniesposito (Giovanni)]

i asked:

snmpwalk -On -v2c -c public   192.168.100.250 system
.1.3.6.1.2.1.1.1.0 = STRING: Linux AS6204T-4689 4.14.x #1 SMP Mon May 10 00:30:33 CST 2021 x86_64
**.1.3.6.1.2.1.1.2.0 = OID: .1.3.6.1.4.1.8072.3.2.10**
.1.3.6.1.2.1.1.3.0 = Timeticks: (4154551) 11:32:25.51
.1.3.6.1.2.1.1.4.0 = STRING: @@no.where
.1.3.6.1.2.1.1.5.0 = STRING: AS6204T-4689
.1.3.6.1.2.1.1.6.0 = STRING: Unknown
.1.3.6.1.2.1.1.8.0 = Timeticks: (0) 0:00:00.00

and i changed the scan function as follows:

"snmp_scan_function" : lambda oid: oid(".1.3.6.1.2.1.1.2.0") == ".1.3.6.1.4.1.8072.3.2.10",

but still i cannot get the plugin executed

[andreas-doehler (Andreas)]

It’s complicated enterprise OID 8072 is the netsnmp OID from every Linux system.

[giovanniesposito (Giovanni)]

You are right, btw this is a linux host. I confirm I get the information changing the snmp scan function