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import itertools
try:
# py2/3
import simplejson as json
except ImportError:
# py2
import json
import ddt
from glusto.core import Glusto as g
from openshiftstoragelibs import baseclass
from openshiftstoragelibs import heketi_ops
from openshiftstoragelibs import openshift_ops
from openshiftstoragelibs import openshift_storage_libs
@ddt.ddt
class TestHeketiZones(baseclass.BaseClass):
@classmethod
def setUpClass(cls):
super(TestHeketiZones, cls).setUpClass()
clusters = heketi_ops.heketi_cluster_list(
cls.heketi_client_node, cls.heketi_server_url, json=True)
cls.cluster_id = clusters['clusters'][0]
cls.allow_heketi_zones_update = g.config.get("common", {}).get(
"allow_heketi_zones_update", False)
def setUp(self):
super(TestHeketiZones, self).setUp()
self.node = self.ocp_master_node[0]
def _set_heketi_zones(self, unique_zones_amount=1):
h = heketi_ops.cmd_run_on_heketi_pod
heketi_db_dir = h("mount | grep heketidbstorage | awk '{print $3}'")
# Copy the Heketi DB file to a backup file to be able to export it
h("cp %s/heketi.db heketi_export.db" % heketi_db_dir)
# Export the Heketi DB to a json file
h("rm -f heketi_db_export.json")
h("heketi db export --dbfile=heketi_export.db "
"--jsonfile=heketi_db_export.json")
h("rm heketi_export.db")
# Read json file info
heketi_db_original_str = h("cat heketi_db_export.json")
heketi_db_data = json.loads(heketi_db_original_str)
# Process the Heketi DB data
node_count = len([
n for n in heketi_db_data['nodeentries'].values()
if (n['State'] == 'online'
and n['Info']['cluster'] == self.cluster_id)
])
if node_count < unique_zones_amount:
self.skipTest(
"Not enough amount of online nodes (%s) to set '%s' unique "
"zones." % (node_count, unique_zones_amount))
zones = itertools.cycle(range(unique_zones_amount))
for n in heketi_db_data['nodeentries'].values():
if (n['State'] == 'online'
and n['Info']['cluster'] == self.cluster_id):
n['Info']['zone'] = next(zones) + 1
# Schedule revert-back of the Heketi DB
cmd_put_data_to_a_json_file = (
"bash -ec \"\"\"echo '%s' > heketi_db_import.json\"\"\"")
cmd_remove_heketi_import_db_file = "rm -f heketi_import.db"
cmd_import_json_file = (
"heketi db import --jsonfile=heketi_db_import.json "
"--dbfile=heketi_import.db")
cmd_apply_imported_data = (
"mv -f heketi_import.db %s/heketi.db" % heketi_db_dir)
cmd_remove_heketi_import_json_files = (
"rm -f heketi_db_export.json heketi_db_import.json")
for i in (1, 0):
self.addCleanup(
openshift_ops.scale_dc_pod_amount_and_wait,
self.node, self.heketi_dc_name, i, wait_step=3)
for cmd in (cmd_remove_heketi_import_json_files,
cmd_apply_imported_data,
cmd_import_json_file,
cmd_remove_heketi_import_db_file,
cmd_put_data_to_a_json_file % (
heketi_db_original_str.replace('"', '\\"'))):
self.addCleanup(h, cmd)
# Import the Heketi DB data
heketi_db_updated_str = json.dumps(heketi_db_data).replace('"', '\\"')
for cmd in (cmd_put_data_to_a_json_file % heketi_db_updated_str,
cmd_remove_heketi_import_db_file,
cmd_import_json_file,
cmd_apply_imported_data,
cmd_remove_heketi_import_json_files):
h(cmd)
# Apply changes by recreating the Heketi POD
openshift_ops.scale_dc_pod_amount_and_wait(
self.node, self.heketi_dc_name, 0, wait_step=3)
openshift_ops.scale_dc_pod_amount_and_wait(
self.node, self.heketi_dc_name, 1, wait_step=3)
return heketi_db_data
def _get_online_nodes(self):
node_ids = heketi_ops.heketi_node_list(
self.heketi_client_node, self.heketi_server_url)
online_nodes = []
for node_id in node_ids:
node_info = heketi_ops.heketi_node_info(
self.heketi_client_node, self.heketi_server_url,
node_id, json=True)
if (node_info["state"] == "online"
and node_info['cluster'] == self.cluster_id):
online_nodes.append(
(node_info["zone"], node_info['hostnames']['storage']))
return online_nodes
@ddt.data(
(3, "strict", False),
(3, "strict", True),
(4, "strict", False),
(4, "strict", True),
(1, "none", False),
(1, "none", True),
(2, "none", False),
(2, "none", True),
(3, "none", False),
(3, "none", True),
# PVC expansion cases:
(3, "strict", False, True),
(3, "strict", True, True),
(1, "none", False, True),
(1, "none", True, True),
(2, "none", False, True),
(2, "none", True, True),
(3, "none", False, True),
(3, "none", True, True),
)
@ddt.unpack
def test_check_pvc_placement_based_on_the_heketi_zones(
self, zone_count, heketi_zone_checking, is_arbiter_vol,
expand=False):
# TODO(vponomar): implement setting env vars for the Heketi dc.
# Check amount of available online heketi nodes
online_nodes = self._get_online_nodes()
node_count = len(online_nodes)
# Check current amount of the Heketi zones
actual_heketi_zones_amount = len(set([n[0] for n in online_nodes]))
if zone_count != actual_heketi_zones_amount:
if self.allow_heketi_zones_update:
if zone_count > node_count:
self.skipTest(
"Not enough online nodes '%s' to test '%s' "
"unique Heketi zones." % (node_count, zone_count))
heketi_db_data = self._set_heketi_zones(zone_count)
online_nodes = [
(n['Info']['zone'], n['Info']['hostnames']['storage'])
for n in heketi_db_data['nodeentries'].values()
]
else:
self.skipTest(
"Required amount of the Heketi zones (%s < %s) is not "
"satisfied and 'common.allow_heketi_zones_update' config "
"option is set to 'False'." % (
zone_count, actual_heketi_zones_amount))
# Create storage class setting "user.heketi.zone-checking" option up
prefix = "autotests-heketi-zones"
sc_name = self.create_storage_class(
sc_name_prefix=prefix, vol_name_prefix=prefix,
allow_volume_expansion=expand,
is_arbiter_vol=is_arbiter_vol,
heketi_zone_checking=heketi_zone_checking)
# Create PVC using above storage class
pvc_name = self.create_and_wait_for_pvc(
pvc_name_prefix=prefix, sc_name=sc_name)
for i in range(2):
# Validate brick placement if heketi zone checking is 'strict'
if heketi_zone_checking == 'strict':
brick_hosts_ips = (
openshift_ops.get_gluster_host_ips_by_pvc_name(
self.node, pvc_name))
placement_zones = {}
for brick_host_ip in brick_hosts_ips:
for node_zone, node_ips in online_nodes:
if brick_host_ip not in node_ips:
continue
placement_zones[node_zone] = placement_zones.get(
node_zone, 0) + 1
break
actual_zone_count = len(placement_zones)
# NOTE(vponomar): '3' is default amount of volume replicas.
# And it is just impossible to find more actual zones than
# amount of replicas/bricks.
brick_number = len(brick_hosts_ips)
expected_zone_count = (
brick_number if brick_number < zone_count else zone_count)
self.assertEqual(
expected_zone_count, actual_zone_count,
"PVC '%s' is incorrectly placed on the Heketi nodes "
"according to their zones. Expected '%s' unique zones, "
"got '%s'." % (pvc_name, zone_count, actual_zone_count))
# Expand PVC if needed
if expand:
expand_size, expand = 2, False
openshift_storage_libs.enable_pvc_resize(self.node)
openshift_ops.resize_pvc(self.node, pvc_name, expand_size)
openshift_ops.verify_pvc_size(self.node, pvc_name, expand_size)
else:
break
# Make sure that gluster vol has appropriate option set
vol_info = openshift_ops.get_gluster_vol_info_by_pvc_name(
self.node, pvc_name)
self.assertIn('user.heketi.zone-checking', vol_info['options'])
self.assertEqual(
vol_info['options']['user.heketi.zone-checking'],
heketi_zone_checking)
if is_arbiter_vol:
self.assertIn('user.heketi.arbiter', vol_info['options'])
self.assertEqual(
vol_info['options']['user.heketi.arbiter'], 'true')
# Create app DC with the above PVC
self.create_dc_with_pvc(pvc_name, timeout=120, wait_step=3)
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