# NOTE: these tests are not yet compatible with vstart_runner.py.
import errno
import json
import time
import logging
from io import BytesIO, StringIO

from tasks.mgr.mgr_test_case import MgrTestCase
from teuthology import contextutil
from teuthology.exceptions import CommandFailedError

log = logging.getLogger(__name__)

NFS_POOL_NAME = '.nfs'  # should match mgr_module.py

# TODO Add test for cluster update when ganesha can be deployed on multiple ports.
class TestNFS(MgrTestCase):
    def _cmd(self, *args):
        return self.get_ceph_cmd_stdout(args)

    def _nfs_cmd(self, *args):
        return self._cmd("nfs", *args)

    def _nfs_complete_cmd(self, cmd):
        return self.run_ceph_cmd(args=f"nfs {cmd}", stdout=StringIO(),
                                 stderr=StringIO(), check_status=False)

    def _orch_cmd(self, *args):
        return self._cmd("orch", *args)

    def _sys_cmd(self, cmd):
        ret = self.ctx.cluster.run(args=cmd, check_status=False, stdout=BytesIO(), stderr=BytesIO())
        stdout = ret[0].stdout
        if stdout:
            return stdout.getvalue()

    def setUp(self):
        super(TestNFS, self).setUp()
        self._load_module('nfs')
        self.cluster_id = "test"
        self.export_type = "cephfs"
        self.pseudo_path = "/cephfs"
        self.path = "/"
        self.fs_name = "nfs-cephfs"
        self.expected_name = "nfs.test"
        self.sample_export = {
         "export_id": 1,
         "path": self.path,
         "cluster_id": self.cluster_id,
         "pseudo": self.pseudo_path,
         "access_type": "RW",
         "squash": "none",
         "security_label": True,
         "protocols": [
           4
         ],
         "transports": [
           "TCP"
         ],
         "fsal": {
           "name": "CEPH",
           "user_id": "nfs.test.1",
           "fs_name": self.fs_name,
         },
         "clients": []
        }

    def _check_nfs_server_status(self):
        res = self._sys_cmd(['sudo', 'systemctl', 'status', 'nfs-server'])
        if isinstance(res, bytes) and b'Active: active' in res:
            self._disable_nfs()

    def _disable_nfs(self):
        log.info("Disabling NFS")
        self._sys_cmd(['sudo', 'systemctl', 'disable', 'nfs-server', '--now'])

    def _fetch_nfs_daemons_details(self, enable_json=False):
        args = ('ps', f'--service_name={self.expected_name}')
        if enable_json:
            args = (*args, '--format=json')
        return self._orch_cmd(*args)

    def _check_nfs_cluster_event(self, expected_event):
        '''
        Check whether an event occured during the lifetime of the NFS service
        :param expected_event: event that was expected to occur
        '''
        event_occurred = False
        # Wait few seconds for NFS daemons' status to be updated
        with contextutil.safe_while(sleep=10, tries=18, _raise=False) as proceed:
            while not event_occurred and proceed():
                daemons_details = json.loads(
                    self._fetch_nfs_daemons_details(enable_json=True))
                log.info('daemons details %s', daemons_details)
                # 'events' key may not exist in the daemon description
                # after a mgr fail over and could take some time to appear
                # (it's populated on first daemon event)
                if 'events' not in daemons_details[0]:
                    continue
                for event in daemons_details[0]['events']:
                    log.info('daemon event %s', event)
                    if expected_event in event:
                        event_occurred = True
                        break
        return event_occurred

    def _check_nfs_cluster_status(self, expected_status, fail_msg):
        '''
        Check the current status of the NFS service
        :param expected_status: Status to be verified
        :param fail_msg: Message to be printed if test failed
        '''
        # Wait for a minute as ganesha daemon takes some time to be
        # deleted/created
        with contextutil.safe_while(sleep=6, tries=10, _raise=False) as proceed:
            while proceed():
                if expected_status in self._fetch_nfs_daemons_details():
                    return
        self.fail(fail_msg)

    def _check_auth_ls(self, export_id=1, check_in=False):
        '''
        Tests export user id creation or deletion.
        :param export_id: Denotes export number
        :param check_in: Check specified export id
        '''
        output = self._cmd('auth', 'ls')
        client_id = f'client.nfs.{self.cluster_id}'
        if check_in:
            self.assertIn(f'{client_id}.{export_id}', output)
        else:
            self.assertNotIn(f'{client_id}.{export_id}', output)

    def _test_idempotency(self, cmd_func, cmd_args):
        '''
        Test idempotency of commands. It first runs the TestNFS test method
        for a command and then checks the result of command run again. TestNFS
        test method has required checks to verify that command works.
        :param cmd_func: TestNFS method
        :param cmd_args: nfs command arguments to be run
        '''
        cmd_func()
        ret = self.get_ceph_cmd_result(*cmd_args)
        if ret != 0:
            self.fail("Idempotency test failed")

    def _test_create_cluster(self):
        '''
        Test single nfs cluster deployment.
        '''
        with contextutil.safe_while(sleep=4, tries=10) as proceed:
            while proceed():
                try:
                    # Disable any running nfs ganesha daemon
                    self._check_nfs_server_status()
                    cluster_create = self._nfs_complete_cmd(
                        f'cluster create {self.cluster_id}')
                    if cluster_create.stderr and 'cluster already exists' \
                            in cluster_create.stderr.getvalue():
                        self._test_delete_cluster()
                        continue
                    # Check for expected status and daemon name
                    # (nfs.<cluster_id>)
                    self._check_nfs_cluster_status(
                        'running', 'NFS Ganesha cluster deployment failed')
                    break
                except (AssertionError, CommandFailedError) as e:
                    log.warning(f'{e}, retrying')

    def _test_delete_cluster(self):
        '''
        Test deletion of a single nfs cluster.
        '''
        self._nfs_cmd('cluster', 'rm', self.cluster_id)
        self._check_nfs_cluster_status('No daemons reported',
                                       'NFS Ganesha cluster could not be deleted')

    def _test_list_cluster(self, empty=False):
        '''
        Test listing of deployed nfs clusters. If nfs cluster is deployed then
        it checks for expected cluster id. Otherwise checks nothing is listed.
        :param empty: If true it denotes no cluster is deployed.
        '''
        nfs_output = self._nfs_cmd('cluster', 'ls')
        jdata = json.loads(nfs_output)
        if empty:
            self.assertEqual(len(jdata), 0)
        else:
            cluster_id = self.cluster_id
            self.assertEqual([cluster_id], jdata)

    def _create_export(self, export_id, create_fs=False, extra_cmd=None):
        '''
        Test creation of a single export.
        :param export_id: Denotes export number
        :param create_fs: If false filesytem exists. Otherwise create it.
        :param extra_cmd: List of extra arguments for creating export.
        '''
        if create_fs:
            self._cmd('fs', 'volume', 'create', self.fs_name)
            with contextutil.safe_while(sleep=5, tries=30) as proceed:
                while proceed():
                    output = self._cmd(
                        'orch', 'ls', '-f', 'json',
                        '--service-name', f'mds.{self.fs_name}'
                    )
                    j = json.loads(output)
                    if j[0]['status']['running']:
                        break
        export_cmd = ['nfs', 'export', 'create', 'cephfs',
                      '--fsname', self.fs_name, '--cluster-id', self.cluster_id]
        if isinstance(extra_cmd, list):
            export_cmd.extend(extra_cmd)
        else:
            export_cmd.extend(['--pseudo-path', self.pseudo_path])
        # Runs the nfs export create command
        self._cmd(*export_cmd)
        # Check if user id for export is created
        self._check_auth_ls(export_id, check_in=True)
        res = self._sys_cmd(['rados', '-p', NFS_POOL_NAME, '-N', self.cluster_id, 'get',
                             f'export-{export_id}', '-'])
        # Check if export object is created
        if res == b'':
            self.fail("Export cannot be created")

    def _create_default_export(self):
        '''
        Deploy a single nfs cluster and create export with default options.
        '''
        self._test_create_cluster()
        self._create_export(export_id='1', create_fs=True)

    def _delete_export(self):
        '''
        Delete an export.
        '''
        self._nfs_cmd('export', 'rm', self.cluster_id, self.pseudo_path)
        self._check_auth_ls()

    def _test_list_export(self):
        '''
        Test listing of created exports.
        '''
        nfs_output = json.loads(self._nfs_cmd('export', 'ls', self.cluster_id))
        self.assertIn(self.pseudo_path, nfs_output)

    def _test_list_detailed(self, sub_vol_path):
        '''
        Test listing of created exports with detailed option.
        :param sub_vol_path: Denotes path of subvolume
        '''
        nfs_output = json.loads(self._nfs_cmd('export', 'ls', self.cluster_id, '--detailed'))
        # Export-1 with default values (access type = rw and path = '\')
        self.assertDictEqual(self.sample_export, nfs_output[0])
        # Export-2 with r only
        self.sample_export['export_id'] = 2
        self.sample_export['pseudo'] = self.pseudo_path + '1'
        self.sample_export['access_type'] = 'RO'
        self.sample_export['fsal']['user_id'] = f'{self.expected_name}.2'
        self.assertDictEqual(self.sample_export, nfs_output[1])
        # Export-3 for subvolume with r only
        self.sample_export['export_id'] = 3
        self.sample_export['path'] = sub_vol_path
        self.sample_export['pseudo'] = self.pseudo_path + '2'
        self.sample_export['fsal']['user_id'] = f'{self.expected_name}.3'
        self.assertDictEqual(self.sample_export, nfs_output[2])
        # Export-4 for subvolume
        self.sample_export['export_id'] = 4
        self.sample_export['pseudo'] = self.pseudo_path + '3'
        self.sample_export['access_type'] = 'RW'
        self.sample_export['fsal']['user_id'] = f'{self.expected_name}.4'
        self.assertDictEqual(self.sample_export, nfs_output[3])

    def _get_export(self):
        '''
        Returns export block in json format
        '''
        return json.loads(self._nfs_cmd('export', 'info', self.cluster_id, self.pseudo_path))

    def _test_get_export(self):
        '''
        Test fetching of created export.
        '''
        nfs_output = self._get_export()
        self.assertDictEqual(self.sample_export, nfs_output)

    def _check_export_obj_deleted(self, conf_obj=False):
        '''
        Test if export or config object are deleted successfully.
        :param conf_obj: It denotes config object needs to be checked
        '''
        rados_obj_ls = self._sys_cmd(['rados', '-p', NFS_POOL_NAME, '-N', self.cluster_id, 'ls'])

        if b'export-' in rados_obj_ls or (conf_obj and b'conf-nfs' in rados_obj_ls):
            self.fail("Delete export failed")

    def _get_port_ip_info(self):
        '''
        Return port and ip for a cluster
        '''
        #{'test': {'backend': [{'hostname': 'smithi068', 'ip': '172.21.15.68',
        #'port': 2049}]}}
        with contextutil.safe_while(sleep=5, tries=6) as proceed:
            while proceed():
                try:
                    info_output = json.loads(
                        self._nfs_cmd('cluster', 'info',
                                      self.cluster_id))['test']['backend'][0]
                    return info_output["port"], info_output["ip"]
                except (IndexError, CommandFailedError) as e:
                    if 'list index out of range' in str(e):
                        log.warning('no port and/or ip found, retrying')
                    else:
                        log.warning(f'{e}, retrying')

    def _test_mnt(self, pseudo_path, port, ip, check=True):
        '''
        Test mounting of created exports
        :param pseudo_path: It is the pseudo root name
        :param port: Port of deployed nfs cluster
        :param ip: IP of deployed nfs cluster
        :param check: It denotes if i/o testing needs to be done
        '''
        tries = 3
        while True:
            try:
                self.ctx.cluster.run(
                    args=['sudo', 'mount', '-t', 'nfs', '-o', f'port={port}',
                          f'{ip}:{pseudo_path}', '/mnt'])
                break
            except CommandFailedError as e:
                if tries:
                    tries -= 1
                    time.sleep(2)
                    continue
                # Check if mount failed only when non existing pseudo path is passed
                if not check and e.exitstatus == 32:
                    return
                raise

        self.ctx.cluster.run(args=['sudo', 'chmod', '1777', '/mnt'])

        try:
            self.ctx.cluster.run(args=['touch', '/mnt/test'])
            out_mnt = self._sys_cmd(['ls', '/mnt'])
            self.assertEqual(out_mnt,  b'test\n')
        finally:
            self.ctx.cluster.run(args=['sudo', 'umount', '/mnt'])

    def _write_to_read_only_export(self, pseudo_path, port, ip):
        '''
        Check if write to read only export fails
        '''
        try:
            self._test_mnt(pseudo_path, port, ip)
        except CommandFailedError as e:
            # Write to cephfs export should fail for test to pass
            self.assertEqual(
                e.exitstatus, errno.EPERM,
                'invalid error code on trying to write to read-only export')
        else:
            self.fail('expected write to a read-only export to fail')

    def _create_cluster_with_fs(self, fs_name, mnt_pt=None):
        """
        create a cluster along with fs and mount it to the path supplied
        :param fs_name: name of CephFS volume to be created
        :param mnt_pt: mount fs to the path
        """
        self._test_create_cluster()
        self._cmd('fs', 'volume', 'create', fs_name)
        with contextutil.safe_while(sleep=5, tries=30) as proceed:
            while proceed():
                output = self._cmd(
                    'orch', 'ls', '-f', 'json',
                    '--service-name', f'mds.{fs_name}'
                )
                j = json.loads(output)
                if j[0]['status']['running']:
                    break
        if mnt_pt:
            with contextutil.safe_while(sleep=3, tries=3) as proceed:
                while proceed():
                    try:
                        self.ctx.cluster.run(args=['sudo', 'ceph-fuse', mnt_pt])
                        break
                    except CommandFailedError as e:
                        log.warning(f'{e}, retrying')
            self.ctx.cluster.run(args=['sudo', 'chmod', '1777', mnt_pt])

    def _delete_cluster_with_fs(self, fs_name, mnt_pt=None, mode=None):
        """
        delete cluster along with fs and unmount it from the path supplied
        :param fs_name: name of CephFS volume to be deleted
        :param mnt_pt: unmount fs from the path
        :param mode: revert to this mode
        """
        if mnt_pt:
            self.ctx.cluster.run(args=['sudo', 'umount', mnt_pt])
            if mode:
                if isinstance(mode, bytes):
                    mode = mode.decode().strip()
                self.ctx.cluster.run(args=['sudo', 'chmod', mode, mnt_pt])
        self._cmd('fs', 'volume', 'rm', fs_name, '--yes-i-really-mean-it')
        self._test_delete_cluster()

    def test_create_and_delete_cluster(self):
        '''
        Test successful creation and deletion of the nfs cluster.
        '''
        self._test_create_cluster()
        self._test_list_cluster()
        self._test_delete_cluster()
        # List clusters again to ensure no cluster is shown
        self._test_list_cluster(empty=True)

    def test_create_delete_cluster_idempotency(self):
        '''
        Test idempotency of cluster create and delete commands.
        '''
        self._test_idempotency(self._test_create_cluster, ['nfs', 'cluster', 'create', self.cluster_id])
        self._test_idempotency(self._test_delete_cluster, ['nfs', 'cluster', 'rm', self.cluster_id])

    def test_create_cluster_with_invalid_cluster_id(self):
        '''
        Test nfs cluster deployment failure with invalid cluster id.
        '''
        try:
            invalid_cluster_id = '/cluster_test'  # Only [A-Za-z0-9-_.] chars are valid
            self._nfs_cmd('cluster', 'create', invalid_cluster_id)
            self.fail(f"Cluster successfully created with invalid cluster id {invalid_cluster_id}")
        except CommandFailedError as e:
            # Command should fail for test to pass
            if e.exitstatus != errno.EINVAL:
                raise

    def test_create_and_delete_export(self):
        '''
        Test successful creation and deletion of the cephfs export.
        '''
        self._create_default_export()
        self._test_get_export()
        port, ip = self._get_port_ip_info()
        self._test_mnt(self.pseudo_path, port, ip)
        self._delete_export()
        # Check if rados export object is deleted
        self._check_export_obj_deleted()
        self._test_mnt(self.pseudo_path, port, ip, False)
        self._test_delete_cluster()

    def test_create_delete_export_idempotency(self):
        '''
        Test idempotency of export create and delete commands.
        '''
        self._test_idempotency(self._create_default_export, [
            'nfs', 'export', 'create', 'cephfs',
            '--fsname', self.fs_name, '--cluster-id', self.cluster_id,
            '--pseudo-path', self.pseudo_path])
        self._test_idempotency(self._delete_export, ['nfs', 'export', 'rm', self.cluster_id,
                                                     self.pseudo_path])
        self._test_delete_cluster()

    def test_create_multiple_exports(self):
        '''
        Test creating multiple exports with different access type and path.
        '''
        # Export-1 with default values (access type = rw and path = '\')
        self._create_default_export()
        # Export-2 with r only
        self._create_export(export_id='2',
                            extra_cmd=['--pseudo-path', self.pseudo_path+'1', '--readonly'])
        # Export-3 for subvolume with r only
        self._cmd('fs', 'subvolume', 'create', self.fs_name, 'sub_vol')
        fs_path = self._cmd('fs', 'subvolume', 'getpath', self.fs_name, 'sub_vol').strip()
        self._create_export(export_id='3',
                            extra_cmd=['--pseudo-path', self.pseudo_path+'2', '--readonly',
                                       '--path', fs_path])
        # Export-4 for subvolume
        self._create_export(export_id='4',
                            extra_cmd=['--pseudo-path', self.pseudo_path+'3',
                                       '--path', fs_path])
        # Check if exports gets listed
        self._test_list_detailed(fs_path)
        self._test_delete_cluster()
        # Check if rados ganesha conf object is deleted
        self._check_export_obj_deleted(conf_obj=True)
        self._check_auth_ls()

    def test_exports_on_mgr_restart(self):
        '''
        Test export availability on restarting mgr.
        '''
        self._create_default_export()
        # unload and load module will restart the mgr
        self._unload_module("cephadm")
        self._load_module("cephadm")
        self._orch_cmd("set", "backend", "cephadm")
        # Check if ganesha daemon is running
        self._check_nfs_cluster_status('running', 'Failed to redeploy NFS Ganesha cluster')
        # Checks if created export is listed
        self._test_list_export()
        port, ip = self._get_port_ip_info()
        self._test_mnt(self.pseudo_path, port, ip)
        self._delete_export()
        self._test_delete_cluster()

    def test_export_create_with_non_existing_fsname(self):
        '''
        Test creating export with non-existing filesystem.
        '''
        try:
            fs_name = 'nfs-test'
            self._test_create_cluster()
            self._nfs_cmd('export', 'create', 'cephfs',
                          '--fsname', fs_name, '--cluster-id', self.cluster_id,
                          '--pseudo-path', self.pseudo_path)
            self.fail(f"Export created with non-existing filesystem {fs_name}")
        except CommandFailedError as e:
            # Command should fail for test to pass
            if e.exitstatus != errno.ENOENT:
                raise
        finally:
            self._test_delete_cluster()

    def test_export_create_with_non_existing_clusterid(self):
        '''
        Test creating cephfs export with non-existing nfs cluster.
        '''
        try:
            cluster_id = 'invalidtest'
            self._nfs_cmd('export', 'create', 'cephfs', '--fsname', self.fs_name,
                          '--cluster-id', cluster_id, '--pseudo-path', self.pseudo_path)
            self.fail(f"Export created with non-existing cluster id {cluster_id}")
        except CommandFailedError as e:
            # Command should fail for test to pass
            if e.exitstatus != errno.ENOENT:
                raise

    def test_export_create_with_relative_pseudo_path_and_root_directory(self):
        '''
        Test creating cephfs export with relative or '/' pseudo path.
        '''
        def check_pseudo_path(pseudo_path):
            try:
                self._nfs_cmd('export', 'create', 'cephfs', '--fsname', self.fs_name,
                              '--cluster-id', self.cluster_id,
                              '--pseudo-path', pseudo_path)
                self.fail(f"Export created for {pseudo_path}")
            except CommandFailedError as e:
                # Command should fail for test to pass
                if e.exitstatus != errno.EINVAL:
                    raise

        self._test_create_cluster()
        self._cmd('fs', 'volume', 'create', self.fs_name)
        check_pseudo_path('invalidpath')
        check_pseudo_path('/')
        check_pseudo_path('//')
        self._cmd('fs', 'volume', 'rm', self.fs_name, '--yes-i-really-mean-it')
        self._test_delete_cluster()

    def test_write_to_read_only_export(self):
        '''
        Test write to readonly export.
        '''
        self._test_create_cluster()
        self._create_export(export_id='1', create_fs=True,
                            extra_cmd=['--pseudo-path', self.pseudo_path, '--readonly'])
        port, ip = self._get_port_ip_info()
        self._check_nfs_cluster_status('running', 'NFS Ganesha cluster restart failed')
        self._write_to_read_only_export(self.pseudo_path, port, ip)
        self._test_delete_cluster()

    def test_cluster_info(self):
        '''
        Test cluster info outputs correct ip and hostname
        '''
        self._test_create_cluster()
        info_output = json.loads(self._nfs_cmd('cluster', 'info', self.cluster_id))
        print(f'info {info_output}')
        info_ip = info_output[self.cluster_id].get('backend', [])[0].pop("ip")
        host_details = {
            self.cluster_id: {
                'backend': [
                    {
                        "hostname": self._sys_cmd(['hostname']).decode("utf-8").strip(),
                        "port": 2049
                    }
                ],
                "virtual_ip": None,
            }
        }
        host_ip = self._sys_cmd(['hostname', '-I']).decode("utf-8").split()
        print(f'host_ip is {host_ip}, info_ip is {info_ip}')
        self.assertDictEqual(info_output, host_details)
        self.assertTrue(info_ip in host_ip)
        self._test_delete_cluster()

    def test_cluster_set_reset_user_config(self):
        '''
        Test cluster is created using user config and reverts back to default
        config on reset.
        '''
        self._test_create_cluster()

        pool = NFS_POOL_NAME
        user_id = 'test'
        fs_name = 'user_test_fs'
        pseudo_path = '/ceph'
        self._cmd('fs', 'volume', 'create', fs_name)
        time.sleep(20)
        key = self._cmd('auth', 'get-or-create-key', f'client.{user_id}', 'mon',
            'allow r', 'osd',
            f'allow rw pool={pool} namespace={self.cluster_id}, allow rw tag cephfs data={fs_name}',
            'mds', f'allow rw path={self.path}').strip()
        config = f""" LOG {{
        Default_log_level = FULL_DEBUG;
        }}

        EXPORT {{
	        Export_Id = 100;
	        Transports = TCP;
	        Path = /;
	        Pseudo = {pseudo_path};
	        Protocols = 4;
	        Access_Type = RW;
	        Attr_Expiration_Time = 0;
	        Squash = None;
	        FSAL {{
	              Name = CEPH;
                      Filesystem = {fs_name};
                      User_Id = {user_id};
                      Secret_Access_Key = '{key}';
	        }}
        }}"""
        port, ip = self._get_port_ip_info()
        self.ctx.cluster.run(args=['ceph', 'nfs', 'cluster', 'config',
            'set', self.cluster_id, '-i', '-'], stdin=config)
        time.sleep(30)
        res = self._sys_cmd(['rados', '-p', pool, '-N', self.cluster_id, 'get',
                             f'userconf-nfs.{user_id}', '-'])
        self.assertEqual(config, res.decode('utf-8'))
        self._test_mnt(pseudo_path, port, ip)
        self._nfs_cmd('cluster', 'config', 'reset', self.cluster_id)
        rados_obj_ls = self._sys_cmd(['rados', '-p', NFS_POOL_NAME, '-N', self.cluster_id, 'ls'])
        if b'conf-nfs' not in rados_obj_ls and b'userconf-nfs' in rados_obj_ls:
            self.fail("User config not deleted")
        time.sleep(30)
        self._test_mnt(pseudo_path, port, ip, False)
        self._cmd('fs', 'volume', 'rm', fs_name, '--yes-i-really-mean-it')
        self._test_delete_cluster()

    def test_cluster_set_user_config_with_non_existing_clusterid(self):
        '''
        Test setting user config for non-existing nfs cluster.
        '''
        cluster_id = 'invalidtest'
        with contextutil.safe_while(sleep=3, tries=3) as proceed:
            while proceed():
                try:
                    self.ctx.cluster.run(args=['ceph', 'nfs', 'cluster',
                                               'config', 'set', cluster_id,
                                               '-i', '-'], stdin='testing')
                    self.fail(f"User config set for non-existing cluster"
                              f"{cluster_id}")
                except CommandFailedError as e:
                    # Command should fail for test to pass
                    if e.exitstatus == errno.ENOENT:
                        break
                    log.warning('exitstatus != ENOENT, retrying')

    def test_cluster_reset_user_config_with_non_existing_clusterid(self):
        '''
        Test resetting user config for non-existing nfs cluster.
        '''
        try:
            cluster_id = 'invalidtest'
            self._nfs_cmd('cluster', 'config', 'reset', cluster_id)
            self.fail(f"User config reset for non-existing cluster {cluster_id}")
        except CommandFailedError as e:
            # Command should fail for test to pass
            if e.exitstatus != errno.ENOENT:
                raise

    def test_create_export_via_apply(self):
        '''
        Test creation of export via apply
        '''
        self._test_create_cluster()
        self.ctx.cluster.run(args=['ceph', 'nfs', 'export', 'apply',
                                   self.cluster_id, '-i', '-'],
                             stdin=json.dumps({
                                 "path": "/",
                                 "pseudo": "/cephfs",
                                 "squash": "none",
                                 "access_type": "rw",
                                 "protocols": [4],
                                 "fsal": {
                                     "name": "CEPH",
                                     "fs_name": self.fs_name
                                 }
                             }))
        port, ip = self._get_port_ip_info()
        self._test_mnt(self.pseudo_path, port, ip)
        self._check_nfs_cluster_status(
            'running', 'NFS Ganesha cluster not running after new export was applied')
        self._test_delete_cluster()

    def test_update_export(self):
        '''
        Test update of export's pseudo path and access type from rw to ro
        '''
        self._create_default_export()
        port, ip = self._get_port_ip_info()
        self._test_mnt(self.pseudo_path, port, ip)
        export_block = self._get_export()
        new_pseudo_path = '/testing'
        export_block['pseudo'] = new_pseudo_path
        export_block['access_type'] = 'RO'
        self.ctx.cluster.run(args=['ceph', 'nfs', 'export', 'apply',
                                   self.cluster_id, '-i', '-'],
                             stdin=json.dumps(export_block))
        if not self._check_nfs_cluster_event('restart'):
            self.fail("updating export's pseudo path should trigger restart of NFS service")
        self._check_nfs_cluster_status('running', 'NFS Ganesha cluster not running after restart')
        self._write_to_read_only_export(new_pseudo_path, port, ip)
        self._test_delete_cluster()

    def test_update_export_ro_to_rw(self):
        '''
        Test update of export's access level from ro to rw
        '''
        self._test_create_cluster()
        self._create_export(
            export_id='1', create_fs=True,
            extra_cmd=['--pseudo-path', self.pseudo_path, '--readonly'])
        port, ip = self._get_port_ip_info()
        self._write_to_read_only_export(self.pseudo_path, port, ip)
        export_block = self._get_export()
        export_block['access_type'] = 'RW'
        self.ctx.cluster.run(
            args=['ceph', 'nfs', 'export', 'apply', self.cluster_id, '-i', '-'],
            stdin=json.dumps(export_block))
        if self._check_nfs_cluster_event('restart'):
            self.fail("update of export's access type should not trigger NFS service restart")
        self._test_mnt(self.pseudo_path, port, ip)
        self._test_delete_cluster()

    def test_update_export_with_invalid_values(self):
        '''
        Test update of export with invalid values
        '''
        self._create_default_export()
        export_block = self._get_export()

        def update_with_invalid_values(key, value, fsal=False):
            export_block_new = dict(export_block)
            if fsal:
                export_block_new['fsal'] = dict(export_block['fsal'])
                export_block_new['fsal'][key] = value
            else:
                export_block_new[key] = value
            try:
                self.ctx.cluster.run(args=['ceph', 'nfs', 'export', 'apply',
                                           self.cluster_id, '-i', '-'],
                        stdin=json.dumps(export_block_new))
            except CommandFailedError:
                pass

        update_with_invalid_values('export_id', 9)
        update_with_invalid_values('cluster_id', 'testing_new')
        update_with_invalid_values('pseudo', 'test_relpath')
        update_with_invalid_values('access_type', 'W')
        update_with_invalid_values('squash', 'no_squash')
        update_with_invalid_values('security_label', 'invalid')
        update_with_invalid_values('protocols', [2])
        update_with_invalid_values('transports', ['UD'])
        update_with_invalid_values('name', 'RGW', True)
        update_with_invalid_values('user_id', 'testing_export', True)
        update_with_invalid_values('fs_name', 'b', True)
        self._test_delete_cluster()

    def test_cmds_without_reqd_args(self):
        '''
        Test that cmd fails on not passing required arguments
        '''
        def exec_cmd_invalid(*cmd):
            try:
                self._nfs_cmd(*cmd)
                self.fail(f"nfs {cmd} command executed successfully without required arguments")
            except CommandFailedError as e:
                # Command should fail for test to pass
                if e.exitstatus != errno.EINVAL:
                    raise

        exec_cmd_invalid('cluster', 'create')
        exec_cmd_invalid('cluster', 'delete')
        exec_cmd_invalid('cluster', 'config', 'set')
        exec_cmd_invalid('cluster', 'config', 'reset')
        exec_cmd_invalid('export', 'create', 'cephfs')
        exec_cmd_invalid('export', 'create', 'cephfs', 'clusterid')
        exec_cmd_invalid('export', 'create', 'cephfs', 'clusterid', 'a_fs')
        exec_cmd_invalid('export', 'ls')
        exec_cmd_invalid('export', 'delete')
        exec_cmd_invalid('export', 'delete', 'clusterid')
        exec_cmd_invalid('export', 'info')
        exec_cmd_invalid('export', 'info', 'clusterid')
        exec_cmd_invalid('export', 'apply')

    def test_non_existent_cluster(self):
        """
        Test that cluster info doesn't throw junk data for non-existent cluster
        """
        cluster_ls = self._nfs_cmd('cluster', 'ls')
        self.assertNotIn('foo', cluster_ls, 'cluster foo exists')
        try:
            self._nfs_cmd('cluster', 'info', 'foo')
            self.fail("nfs cluster info foo returned successfully for non-existent cluster")
        except CommandFailedError as e:
            if e.exitstatus != errno.ENOENT:
                raise

    def test_nfs_export_with_invalid_path(self):
        """
        Test that nfs exports can't be created with invalid path
        """
        mnt_pt = '/mnt'
        preserve_mode = self._sys_cmd(['stat', '-c', '%a', mnt_pt])
        self._create_cluster_with_fs(self.fs_name, mnt_pt)
        try:
            self._create_export(export_id='123',
                                extra_cmd=['--pseudo-path', self.pseudo_path,
                                           '--path', '/non_existent_dir'])
        except CommandFailedError as e:
            if e.exitstatus != errno.ENOENT:
                raise
        self._delete_cluster_with_fs(self.fs_name, mnt_pt, preserve_mode)

    def test_nfs_export_creation_at_filepath(self):
        """
        Test that nfs exports can't be created at a filepath
        """
        mnt_pt = '/mnt'
        preserve_mode = self._sys_cmd(['stat', '-c', '%a', mnt_pt])
        self._create_cluster_with_fs(self.fs_name, mnt_pt)
        self.ctx.cluster.run(args=['touch', f'{mnt_pt}/testfile'])
        try:
            self._create_export(export_id='123', extra_cmd=['--pseudo-path',
                                                            self.pseudo_path,
                                                            '--path',
                                                            '/testfile'])
        except CommandFailedError as e:
            if e.exitstatus != errno.ENOTDIR:
                raise
        self.ctx.cluster.run(args=['rm', '-rf', '/mnt/testfile'])
        self._delete_cluster_with_fs(self.fs_name, mnt_pt, preserve_mode)

    def test_nfs_export_creation_at_symlink(self):
        """
        Test that nfs exports can't be created at a symlink path
        """
        mnt_pt = '/mnt'
        preserve_mode = self._sys_cmd(['stat', '-c', '%a', mnt_pt])
        self._create_cluster_with_fs(self.fs_name, mnt_pt)
        self.ctx.cluster.run(args=['mkdir', f'{mnt_pt}/testdir'])
        self.ctx.cluster.run(args=['ln', '-s', f'{mnt_pt}/testdir',
                                   f'{mnt_pt}/testdir_symlink'])
        try:
            self._create_export(export_id='123',
                                extra_cmd=['--pseudo-path',
                                           self.pseudo_path,
                                           '--path',
                                           '/testdir_symlink'])
        except CommandFailedError as e:
            if e.exitstatus != errno.ENOTDIR:
                raise
        self.ctx.cluster.run(args=['rm', '-rf', f'{mnt_pt}/*'])
        self._delete_cluster_with_fs(self.fs_name, mnt_pt, preserve_mode)
