PythonTestSuite::recycle_cluster is a function that releases resources
of an old, dirty cluster to make it reusable. It closes log_file and
maintenance_socket_dir for running nodes in a dirty cluster, however it
doesn't do the same for stopped nodes. It leads to leakage of file
descriptors of stopped nodes, which in turn can lead to hitting ulimit
of open files (that is often 1024) if the leaking test is repeated with
`./test.py --repeat ...`. The problem was detected when tests from
`test/cluster/dtest/` directory were executed with high `repeat` value.
This commit extends `recycle_cluster` to close and cleanup logfile and
`socket_dir` for nodes that are stopped (because self.servers in
ScyllaCluster is ChainMap of self.running and self.stopped).
Closesscylladb/scylladb#24243
Test suites with `type: Python` are using single Scylla node
created by test.py, but it's handy to print a path to a log
file in pytest log too to make it easier to find the file
on failures.
Closesscylladb/scylladb#23683
Add path constants to `test` module and use them in different test suites
instead of own dups of the same code:
- TOP_SRC_DIR : ScyllaDB's source code root directory
- TEST_DIR : the directory with test.py tests and libs
- BUILD_DIR : directory with ScyllaDB's build artefacts
Add TestSuite.log_dir attribute as a ScyllaDB's build mode subdir of a path
provided using `--tmpdir` CLI argument. Don't use `tmpdir` name because it
mixed up with pytest's built-in fixture and `--tmpdir` option itself.
Change default value for `--tmdir` from `./testlog` to `TOP_SRC_DIR/testlog`
Refactor `ResourceGather*` classes to use path from a `test` object instead of
providing it separately.
Move modes constants to `test` module and remove duplications.
Move `prepare_dirs()` and `start_3rd_party_services()` from `pylib.util` to
`pylib.suite.base` to avoid circular imports (with little refactoring to
use `pathlib.Path` instead of `str` as paths.)
Also, in some places refactor to use f-strings for formatting.
Currently, pytest truncates long objects in assertions.
This makes understanding the failure message difficult.
This will increase verbosity and pytest will stop truncating messages.
Closesscylladb/scylladb#23263
