I'm trying to set up a 3-node CrateDB cluster and now I can't even connect with crash

CrateDB
2

You installed CrateDB using the apt packages, correct?
If you do that, CrateDB starts automatically ins single-node mode which also prevents adding the nodes to any sort of cluster. This is intentional in a way, that apt packages should start without any additional confiuguration.

There are basically two ways to fix this

  • using the crate-node tool

or (easier)

  • deleting the cluster state by …
    • service crate stop
    • rm -rf /usr/share/crate/data
    • service crate start
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