1 files changed, 38 insertions, 0 deletions
diff --git a/qa/tasks/cephfs/test_recovery_fs.py b/qa/tasks/cephfs/test_recovery_fs.py
new file mode 100644
index 000000000..bbcdf9769
--- /dev/null
+++ b/qa/tasks/cephfs/test_recovery_fs.py
@@ -0,0 +1,38 @@
+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")