Cannot find the "data" array in the received JSON object - Custom LLD rules

[pengels]

Hello! I'm trying to get automatic monitoring of remote mounts going, but I'm getting this error: I have this script that is run by the discovery rule:

#!/usr/bin/env python3

import re

# Empty dictionary for later
mounts_dict = {"data": []}

# read /etc/fstab to get any permanent mounts
f = open("/etc/fstab", "r")
fstab = f.read()

# search through /etc/fstab to find IP addresses
list_of_ips = re.findall(r"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}", fstab)

# Search through all the lines in /etc/fstab
for line in fstab.split('\n'):
# search each line to see if it's a remote mount
for entry in list_of_ips:
# append the local path to the mount dictionary if it's valid
if line.find(entry) != -1:
mount_name = line.split()[1]
formatted_entry = ({"{#MOUNTPOINT}":"%s" % (mount_name)})
if formatted_entry not in mounts_dict["data"]:
mounts_dict["data"].append(formatted_entry)

# Print it out and hope Zabbix understands
print(mounts_dict)

This script is run via this in Zabbix:
template->Discovery Rules->This item, which does
system.run[/path/to/script/zabbix_enumerate_mounts.py]

When I run this on the command line, I get this output:
root@system $ /path/to/script/zabbix_enumerate_mounts.py

{'data': [{'{#MOUNTPOINT}': '/mount/orders'}, {'{#MOUNTPOINT}': '/mount/downloads'}]}

Item prototype is to check for a .placeholder file inside that mount to check if the mount is working. It's running this:
vfs.file.exists[{#MOUNTPOINT}/.placeholder]

When I try to run the discovery rule in Zabbix by checking the box and clicking "Execute Now", I get this error: Cannot find the "data" array in the received JSON object.

I tried to follow this format:https://www.zabbix.com/documentation...stom_lld_rules

I've also tried it where I get this output, with the same error message:

[{'{#MOUNTPOINT}': '/mount/orders'}, {'{#MOUNTPOINT}': '/mount/downloads'}]

I accomplish this by making mounts_dict just a list instead of a dictionary with the data key.

I've tried copying/pasting the sample output from the above link and just writing a script that spits that out, and I still get the same error, so I don't know if the format is the issue. I've also tried the lowercase macro names and the JSONpath thingy too.

Running Zabbix 5.0.8 on CentOS 7. Remote systems are also CentOS 7. Does anyone have any insight?

[Hamardaban]

Try

[{"{#MOUNTPOINT}": "/mount/orders"}, {"{#MOUNTPOINT}": "/mount/downloads"}]

{"data":[{"{#MOUNTPOINT}": "/mount/orders"}, {"{#MOUNTPOINT}": "/mount/downloads"}]}

[pengels]

Still nothing. Thanks for the suggestion, though. The error stayed the same and everything.

[Hamardaban]

Tested (again) the lld operation on your json-items are being created. The syntax I wrote is correct. (zabbix 5.2)

[pengels]

Here's what the log says:

102160:20210211:080414.160 End of zbx_waitpid():88993
102160:20210211:080414.160 EXECUTE_STR() command:'/opt/scripts/zabbix_enumerate_mounts.py' len:99 cmd_result:'
{"data":[{"{#MOUNTP'
102160:20210211:080414.160 Sending back [
{"data":[{"{#MOUNTPOINT}": "/mount/orders"}, {"{#MOUNTPOINT}": "/mount/downloads"}]}]
102160:20210211:080414.160 zbx_setproctitle() title:'listener #1 [waiting for connection]'
102162:20210211:080414.160 In zbx_tls_accept()

To test your syntax, I just copied/pasted it into a print statement, so it should only have returned what you sent. I believe you that the syntax is correct, and it looks like it's sending back correctly. Is there something goofy somewhere else? Is the server just confused about it?

[pengels]

Here's what it looks like in the server template config:


I left Preprocessing, LLD Macros, Filters, and Overrides default. Here's the item prototype:

[pengels]

oh goodness gracious. I had a silly thing in preprocessing left over from testing a week ago that was goofing it all up. Thank you for your replies.