Fetch multiple -derived- items using only one base item

[cbichis]

Hi,

I need to extract from a server I am monitoring about 20 items data.

The items can be all fetched using a single call, which is expensive.

The data is stored into the output like this:

item1: value1 (numeric)
item2: value2 (numeric)
item3: value3 (numeric)
.................
item20: value20 (numeric)

Currently I have one UserParameter which allows me to extract every item with a call:

UserParameter=app.status[*],/path-to-app/status | awk '/^$1/{$$1="";gsub(/^[ \t]+/, "");print}'

Obviously this means I will have 20 - costly - calls to the app... Which is not good at all...

I need to find out a way to only call the app one time and then extract (grep/awk) the items from the "base item".

I think I have 2 solutions:

1. Zabbix agent is fetching the entire app status output, which is stored within an item (Text) and on Zabbix server I use Calculated items for rest 20. There is however an issue. I can't find something to help me grep/awk the numerically values from the "base item". The functions which can be used on a Calculated item seems to be very limited:

https://www.zabbix.com/documentation/2.0/manual/appendix/triggers/functions

2. Zabbix agent is fetching the entire app status output, which is stored within an item (Text) and on Zabbix server. Then I use 20 External check items to extract the amounts for them from base item. Here is another issue. I need to pass to external script the value of "base item".

However, as far as I tested I can't find how to pass item app.status value to external script:

app_status.sh["paramtoget","{last(app.status)}"]
or
app_status.sh["paramtoget",{last(app.status)}]
or
app_status.sh["paramtoget",last(app.status)]

Doesn't work as seems it's not passing the last app.status item value

3. At least for now I am trying to avoid using trappers.

Anyone has any idea how to either fix one of above issues or any other idea how to solve the problem?

[Bernd Hohmann]

I had the same problem getting a couple of values for a HTTP-Status.

My solution: I created a script like "gethttpstatus(host,what)". When calling "what=status" it collects all the values and write them into a file /tmp/$host. When calling "what=value1" it returns the first line from /tmp/$host and so on.

Small problem: its not guaranteed that Zabbix will call the script in the right order (status,value1,value2…..) so the first run after a status change may return some wrong values - which isn't a real problem.

Bernd

[Heilig]

https://www.zabbix.com/forum/showthread.php?p=130396#post130396

In this situation, I think it would be appropriate to use zabbix_sender.

[cbichis]

Thanks Bernd, I already though of that but I don't find it a very good idea.

Heiling, I will check using sender.

Thank you!