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import logging
from os.path import join as os_path_join
from tasks.cephfs.cephfs_test_case import CephFSTestCase
log = logging.getLogger(__name__)
class TestFSRecovery(CephFSTestCase):
"""
Tests for recovering FS after loss of FSMap
"""
CLIENTS_REQUIRED = 1
MDSS_REQUIRED = 3
def test_recover_fs_after_fsmap_removal(self):
data_pool = self.fs.get_data_pool_name()
metadata_pool = self.fs.get_metadata_pool_name()
# write data in mount, and fsync
self.mount_a.create_n_files('file_on_fs', 1, sync=True)
# faild MDSs to allow removing the file system in the next step
self.fs.fail()
# Remove file system to lose FSMap and keep the pools intact.
# This mimics the scenario where the monitor store is rebuilt
# using OSDs to recover a cluster with corrupt monitor store.
# The FSMap is permanently lost, but the FS pools are
# recovered/intact
self.fs.rm()
# Recreate file system with pool and previous fscid
self.fs.mon_manager.raw_cluster_cmd(
'fs', 'new', self.fs.name, metadata_pool, data_pool,
'--recover', '--force', '--fscid', f'{self.fs.id}')
self.fs.set_joinable()
# Check status of file system
self.fs.wait_for_daemons()
# check data in file sytem is intact
filepath = os_path_join(self.mount_a.hostfs_mntpt, 'file_on_fs_0')
self.assertEqual(self.mount_a.read_file(filepath), "0")
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