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path: root/tests/functional/gluster_stability/test_gluster_block_stability.py
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from openshiftstoragelibs.baseclass import GlusterBlockBaseClass
from openshiftstoragelibs.command import cmd_run
from openshiftstoragelibs.exceptions import ConfigError
from openshiftstoragelibs.heketi_ops import (
    heketi_node_info,
    heketi_node_list,
)
from openshiftstoragelibs.node_ops import (
    find_vm_name_by_ip_or_hostname,
    power_off_vm_by_name,
    power_on_vm_by_name,
)
from openshiftstoragelibs.openshift_ops import (
    cmd_run_on_gluster_pod_or_node,
    get_ocp_gluster_pod_details,
    get_pod_name_from_dc,
    get_pv_name_from_pvc,
    oc_adm_manage_node,
    oc_delete,
    oc_get_custom_resource,
    oc_get_schedulable_nodes,
    oc_rsh,
    wait_for_pod_be_ready,
    wait_for_resource_absence,
    wait_for_service_status_on_gluster_pod_or_node,
)
from openshiftstoragelibs.openshift_storage_libs import (
    get_active_and_enabled_devices_from_mpath,
    get_iscsi_block_devices_by_path,
    get_iscsi_session,
    get_mpath_name_from_device_name,
)
from openshiftstoragelibs.waiter import Waiter


class TestGlusterBlockStability(GlusterBlockBaseClass):
    '''Class that contain gluster-block stability TC'''

    def setUp(self):
        super(TestGlusterBlockStability, self).setUp()
        self.node = self.ocp_master_node[0]

    def initiator_side_failures(self):
        self.create_storage_class()
        self.create_and_wait_for_pvc()

        # Create app pod
        dc_name, pod_name = self.create_dc_with_pvc(self.pvc_name)

        iqn, _, node = self.verify_iscsi_sessions_and_multipath(
            self.pvc_name, dc_name)

        # Make node unschedulabe where pod is running
        oc_adm_manage_node(
            self.node, '--schedulable=false', nodes=[node])

        # Make node schedulabe where pod is running
        self.addCleanup(
            oc_adm_manage_node, self.node, '--schedulable=true',
            nodes=[node])

        # Delete pod so it get respun on any other node
        oc_delete(self.node, 'pod', pod_name)
        wait_for_resource_absence(self.node, 'pod', pod_name)

        # Wait for pod to come up
        pod_name = get_pod_name_from_dc(self.node, dc_name)
        wait_for_pod_be_ready(self.node, pod_name)

        # Get the iscsi session from the previous node to verify logout
        iscsi = get_iscsi_session(node, iqn, raise_on_error=False)
        self.assertFalse(iscsi)

        self.verify_iscsi_sessions_and_multipath(self.pvc_name, dc_name)

    def test_initiator_side_failures_initiator_and_target_on_different_node(
            self):

        nodes = oc_get_schedulable_nodes(self.node)

        # Get list of all gluster nodes
        cmd = ("oc get pods --no-headers -l glusterfs-node=pod "
               "-o=custom-columns=:.spec.nodeName")
        g_nodes = cmd_run(cmd, self.node)
        g_nodes = g_nodes.split('\n') if g_nodes else g_nodes

        # Skip test case if required schedulable node count not met
        if len(set(nodes) - set(g_nodes)) < 2:
            self.skipTest("skipping test case because it needs at least two"
                          " nodes schedulable")

        # Make containerized Gluster nodes unschedulable
        if g_nodes:
            # Make gluster nodes unschedulable
            oc_adm_manage_node(
                self.node, '--schedulable=false',
                nodes=g_nodes)

            # Make gluster nodes schedulable
            self.addCleanup(
                oc_adm_manage_node, self.node, '--schedulable=true',
                nodes=g_nodes)

        self.initiator_side_failures()

    def test_initiator_side_failures_initiator_and_target_on_same_node(self):
        # Note: This test case is supported for containerized gluster only.

        nodes = oc_get_schedulable_nodes(self.node)

        # Get list of all gluster nodes
        cmd = ("oc get pods --no-headers -l glusterfs-node=pod "
               "-o=custom-columns=:.spec.nodeName")
        g_nodes = cmd_run(cmd, self.node)
        g_nodes = g_nodes.split('\n') if g_nodes else g_nodes

        # Get the list of nodes other than gluster
        o_nodes = list((set(nodes) - set(g_nodes)))

        # Skip the test case if it is crs setup
        if not g_nodes:
            self.skipTest("skipping test case because it is not a "
                          "containerized gluster setup. "
                          "This test case is for containerized gluster only.")

        # Make other nodes unschedulable
        oc_adm_manage_node(
            self.node, '--schedulable=false', nodes=o_nodes)

        # Make other nodes schedulable
        self.addCleanup(
            oc_adm_manage_node, self.node, '--schedulable=true', nodes=o_nodes)

        self.initiator_side_failures()

    def test_target_side_failures_gluster_blockd_kill_when_ios_going_on(self):
        """Run I/Os on block volume while gluster-blockd is stoped"""
        self.create_and_wait_for_pvc()

        # Create app pod
        dc_name, pod_name = self.create_dc_with_pvc(self.pvc_name)

        iqn, hacount, node = self.verify_iscsi_sessions_and_multipath(
            self.pvc_name, dc_name)

        cmd_run_io = 'dd if=/dev/urandom of=/mnt/%s bs=4k count=10000'

        # Get the paths
        devices = get_iscsi_block_devices_by_path(node, iqn)
        mpath = get_mpath_name_from_device_name(node, list(devices.keys())[0])
        mpath_dev = get_active_and_enabled_devices_from_mpath(node, mpath)
        paths = mpath_dev['active'] + mpath_dev['enabled']

        for path in paths:
            node_ip = devices[path]

            # Stop gluster-blockd service
            cmd_run_on_gluster_pod_or_node(
                self.node, 'systemctl stop gluster-blockd', node_ip)
            self.addCleanup(
                cmd_run_on_gluster_pod_or_node, self.node,
                'systemctl start gluster-blockd', node_ip)

            wait_for_pod_be_ready(self.node, pod_name, 6, 3)

            # Verify tcmu-runner, gluster-block-target service is running
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'tcmu-runner', 'active', 'running', node_ip)
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'gluster-block-target', 'active', 'exited', node_ip)

            self.verify_all_paths_are_up_in_multipath(mpath, hacount, node)

            # Run I/O
            oc_rsh(self.node, pod_name, cmd_run_io % 'file1')

            # Start service and verify status
            cmd_run_on_gluster_pod_or_node(
                self.node, 'systemctl start gluster-blockd', node_ip)
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'gluster-blockd', 'active', 'running', node_ip)

            # Run I/O
            oc_rsh(self.node, pod_name, cmd_run_io % 'file2')

        # Verify that active path is same as before
        mpath_dev_new = get_active_and_enabled_devices_from_mpath(node, mpath)
        self.assertEqual(mpath_dev['active'][0], mpath_dev_new['active'][0])

    def test_target_side_failures_tcmu_runner_kill_when_ios_going_on(self):
        """Run I/Os on block volume while tcmu-runner is stoped"""
        self.create_and_wait_for_pvc()

        # Create app pod
        dc_name, pod_name = self.create_dc_with_pvc(self.pvc_name)

        iqn, hacount, node = self.verify_iscsi_sessions_and_multipath(
            self.pvc_name, dc_name)

        # Run I/O
        cmd_run_io = 'dd if=/dev/urandom of=/mnt/%s bs=4k count=10000'

        devices = get_iscsi_block_devices_by_path(node, iqn)
        mpath = get_mpath_name_from_device_name(node, list(devices.keys())[0])
        mpath_dev = get_active_and_enabled_devices_from_mpath(node, mpath)

        paths = mpath_dev['active'] + mpath_dev['enabled']

        for path in paths:
            node_ip = devices[path]

            # Stop tcmu-runner service
            cmd_run_on_gluster_pod_or_node(
                self.node, 'systemctl stop tcmu-runner', node_ip)
            start_svc = ('systemctl start gluster-blockd gluster-block-target '
                         'tcmu-runner')
            self.addCleanup(
                cmd_run_on_gluster_pod_or_node, self.node, start_svc, node_ip)

            wait_for_pod_be_ready(self.node, pod_name, 6, 3)

            # Verify gluster-blockd gluster-block-target service is not running
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'gluster-blockd', 'inactive', 'dead', node_ip,
                raise_on_error=False)
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'gluster-block-target', 'failed',
                'Result: exit-code', node_ip, raise_on_error=False)
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'tcmu-runner', 'inactive', 'dead', node_ip,
                raise_on_error=False)

            # Wait for path to be failed
            for w in Waiter(120, 5):
                out = cmd_run('multipath -ll %s | grep %s' % (
                    mpath, path), node)
                if 'failed faulty running' in out:
                    break
            if w.expired:
                self.assertIn(
                    'failed faulty running', out, 'path %s of mpath %s is '
                    'still up and running. It should not be running '
                    'because tcmu-runner is down' % (path, mpath))

            # Run I/O
            wait_for_pod_be_ready(self.node, pod_name, 6, 3)
            oc_rsh(self.node, pod_name, cmd_run_io % 'file2')

            # Start services
            cmd_run_on_gluster_pod_or_node(self.node, start_svc, node_ip)

            # Verify services are running
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'tcmu-runner', 'active', 'running', node_ip)
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'gluster-block-target', 'active', 'exited', node_ip)
            wait_for_service_status_on_gluster_pod_or_node(
                self.node, 'gluster-blockd', 'active', 'running', node_ip)

            # Wait for path to come up
            self.verify_all_paths_are_up_in_multipath(mpath, hacount, node)

            # Run I/O
            wait_for_pod_be_ready(self.node, pod_name, 6, 3)
            oc_rsh(self.node, pod_name, cmd_run_io % 'file3')

        # Verify it returns to the original active path
        for w in Waiter(120, 5):
            mpath_dev_new = get_active_and_enabled_devices_from_mpath(
                node, mpath)
            if mpath_dev['active'][0] == mpath_dev_new['active'][0]:
                break
        if w.expired:
            self.assertEqual(
                mpath_dev['active'][0], mpath_dev_new['active'][0])

        # Verify that all the paths are up
        self.verify_all_paths_are_up_in_multipath(mpath, hacount, node)

    def test_initiator_side_failure_restart_pod_when_target_node_is_down(self):
        """Restart app pod when one gluster node is down"""
        # Skip test if does not meets requirements
        try:
            vm_name = find_vm_name_by_ip_or_hostname(self.node)
        except (NotImplementedError, ConfigError) as e:
            self.skipTest(e)

        # Get heketi node list
        h_nodes_ids = heketi_node_list(
            self.heketi_client_node, self.heketi_server_url)

        # Get the ips and hostname of gluster nodes from heketi
        h_nodes = {}
        for node in h_nodes_ids:
            info = heketi_node_info(
                self.heketi_client_node, self.heketi_server_url, node,
                json=True)
            h_nodes[info['hostnames']['storage'][0]] = (
                info['hostnames']['manage'][0])

        pvc_name = self.create_and_wait_for_pvc()
        pv_name = get_pv_name_from_pvc(self.node, pvc_name)

        # Create app pod
        dc_name, pod_name = self.create_dc_with_pvc(self.pvc_name)

        iqn, hacount, p_node = self.verify_iscsi_sessions_and_multipath(
            self.pvc_name, dc_name)

        # Get list of containerized gluster nodes
        g_nodes = get_ocp_gluster_pod_details(self.node)

        # Get target portals for the PVC
        targets = oc_get_custom_resource(
            self.node, 'pv', ':.spec.iscsi.portals,:.spec.iscsi.targetPortal',
            name=pv_name)
        targets = [item.strip('[').strip(
            ']') for item in targets if isinstance(item, str)]

        # Select hostname for powering off
        if h_nodes[targets[0]] == p_node:
            vm_hostname = h_nodes[targets[1]]
        else:
            vm_hostname = h_nodes[targets[0]]

        # Find VM Name for powering it off
        vm_name = find_vm_name_by_ip_or_hostname(vm_hostname)

        # Unschedulable Node if containerised glusterfs
        if g_nodes:
            oc_adm_manage_node(self.node, '--schedulable=false', [vm_hostname])
            self.addCleanup(
                oc_adm_manage_node, self.node, '--schedulable', [vm_hostname])

        # Power off gluster node
        power_off_vm_by_name(vm_name)
        self.addCleanup(power_on_vm_by_name, vm_name)

        # Delete pod so it get respun
        oc_delete(self.node, 'pod', pod_name)
        wait_for_resource_absence(self.node, 'pod', pod_name)

        # Wait for pod to come up when 1 target node is down
        pod_name = get_pod_name_from_dc(self.node, dc_name)
        wait_for_pod_be_ready(self.node, pod_name, timeout=120, wait_step=5)