[bug] node dashboard only shows latest instance

[uhthomas]

Describe the bug

Some panels are using node to filter, and others are using a hidden instance variable ( label_values(node_uname_info{nodename=~"(?i:($node))"}, instance)). If a node changes its IP, then some panels will look normal and others will be missing data.

How to reproduce?

1. Collect node metrics.
2. Change IP of node.
3. Observe the node dashboard has some unaffected panels, and others which only show the latest 'instance'.

Expected behavior

It should probably show all instances of a node.

Additional context

No response

[dotdc]

Hi @uhthomas,

I've been thinking about this and don't see a fix for this one.
The node / instance hack was used to have convenient names while using the dashboard, I'd like to keep it that way.

For me, a node changing IP is a rare corner case, but I guess it depends on your setup.

How often do you have IP changes on your nodes?

[dotdc]

Documented in 34a469f