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Due to a missing functionality in PythonTest, `unshare` is never used to mount volumes. As a consequence: + volumes are created with sudo which is undesired + they are not cleared automatically Even having the missing support in place, the approach with mounting volumes with `unshare` would not work as http server, a pool of clusters, and scylla cluster manager are started outside of the new namespace. Thus cluster would have no access to volumes created with `unshare`. The new approach that works with and without dbuild and does not require sudo, uses the following three commands to mount a volume: truncate -s 100M /tmp/mydevice.img mkfs.ext4 /tmp/mydevice.img fuse2fs /tmp/mydevice.img test/ Additionally, a proper cleanup is performed, i.e. servers are stopped gracefully and and volumes are unmounted after the tests using them are completed. Fixes: https://github.com/scylladb/scylladb/issues/25906 Closes scylladb/scylladb#26065
Extension of the cluster tests, where all tests require externally mounted volumes to be used by scylla cluster nodes. The volumes are passed with --workdir.
The volumes can be of any size. A help generator space_limited_servers is provided
to easily create a cluster of any given number of nodes, where each node operates in
a separate volume.