I am new to Grafana, so please understand this, and perhaps ask clarifying questions.
What Grafana version and what operating system are you using?
v9.1.7 in EKS (AlpineLinux I think). OS is irrelevant.
What are you trying to achieve?
Two panels in one dashboard that display related information should change at the same time.
The information in Panel-A and Panel-B are related but ceom from different sources with different ‘keys’ (not grafana term - just meaning one is custom var and one is datasource var)
========= how to have ONE dropdown that changes BOTH panels
Zabbix data source, visualization depends on a CUSTOM VAR with fixed values like (ProductionUSA, ProductionEU, ProductionCA)
This panel works fine by itself, with one dropdown
MySQL datasource. Visualization depends on which Mysql DB is queried, as determined by the dropdown from the MySQL datasource (SpoolDB-US, SpoolDB-EU, SpoolDB-CA)
This panel works fine by itself, with the dropdown
This doesn’t seem to be Data Links or Panel Links … that seems to be something different as far as I’m reading. I want one dashboard dropdown that will result in BOTH panels changing, but need two VAR to update at the same time …
How are you trying to achieve it?
not at all … cannot figure out how to accomplish this
What did you expect to happen?
Can you copy/paste the configuration(s) that you are having problems with?
Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.
Did you follow any online instructions? If so, what is the URL?
been looking at many Grafana doc pages
dashboard drop downs are related to variables. So your one dashboard dropdown (var motherOfAllVars) can trigger an effect on the other 2 vars if there is a relationship between motherOfAllVars and the second. You can use motherOfAllVars to filter down or affect var 2 & 3 and in turn 2 & 3 can affect the related panels
Thank you, but I’m still unclear on the actual mechanism to do this.
Completely understand that dropdowns are related to vars. I have those now, and the dashboard currently has two dropdowns, and if I set each manually I get the result I expect. But I am not understanding how to ‘link’ or ‘relate’ them
first dropdown is from var ‘Env’ which is a custom var with 4 static string values that have to be static. The Data source is zabbix (and the ‘Env’ string is part of a regex to get a custom value from specific hosts. values are “ProductionUSA, ProductionEUa, ProductionA, staging0”
second dropdown is var ‘Spool’ and is a ‘mysql’ Datasource “SpoolDB_CA_RDS SpoolDB_EU_RDS SpoolDB_Staging0_RDS SpoolDB_USA_RDS”
so for instance if I want to look at ‘US’, I need Env=ProductionUSA, and Spool-SpoolDB_USA_RDS, or to view ‘CA’ (Canada), I need Env=ProductionA (don’t ask, not changeable), and Spool=SpoolDB_CA_RDS
I could potentially change the Spool Datasources names so that each one included the same string as the ‘Env’. But I don’t see that it would help.
(Meaning SpoolDB_CA_RDS could become something like SpoolDB_RDS_ProductionA, for instance)
Idk if this will help you, but I pull data from InfluxDB and Microsoft SQL servers. Had a similar issue but l managed to solved on 2 ways :
mixed data sources, added both queries in same panel as table and then had another panel pulling data and applying transformations. (Very limited options).
I discovered that InfluxDB had a SQL function to execute the queries, so I did everything inside an InfluxDB query, mainly because I know flux language beter than SQL and was easier for me to work all my data manipulation on flux language.