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Instance Group Manager does not remove nodes with empty string in the zone field #2658

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Instance Group Manager does not remove nodes with empty string in the zone field #2658

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Commits on Sep 17, 2024

  1. Support for Nodes with Empty Zone 

    Nodes can have empty zone if it not has been assigned yet.

The zone was retrieved from providerID using the following Regular Expression Matching and taking the second match: ```var providerIDRE = regexp.MustCompile(`^` + "gce" + `://([^/]+)/([^/]+)/([^/]+)$`)```

In the case of empty zone it was generating an Error.
In order to allow an empty zone to match the Regular Expression, it has been updated to:

```var providerIDRE = regexp.MustCompile(`^` + "gce" + `://([^/]+)/([^/]*)/([^/]+)$`)```

After that, I updated all the instances where the code was checking the error, to check also for the empty zone.

I updated the Instance Group Manager to not remove the nodes which do not have a zone assigned.
    @08volt
    08volt committed Sep 17, 2024
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