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[action] [PR:11652] Update the static dns test case #11751

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Merged
mssonicbld merged 1 commit into from
Feb 22, 2024
Merged

[action] [PR:11652] Update the static dns test case #11751

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31 changes: 24 additions & 7 deletions tests/dns/static_dns/test_static_dns.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
import logging
import random
import re
import os

from tests.common.reboot import reboot
from tests.common.config_reload import config_reload
Expand Down Expand Up @@ -40,6 +41,22 @@
EXCEED_MAX_ERR = r"Error: The maximum number \(3\) of nameservers exceeded"
DUPLICATED_IP_ERR = r"Error: .* nameserver is already configured"

MGMT_PORT = "eth0"
DHCLIENT_PID_FILE = "/tmp/dhclient-dns-test.pid"


def start_dhclient(duthost):
duthost.shell(f"sudo dhclient -pf {DHCLIENT_PID_FILE} {MGMT_PORT}")


@pytest.fixture()
def stop_dhclient(duthost):
yield

if os.path.exists(DHCLIENT_PID_FILE):
duthost.shell(f"sudo kill $(cat {DHCLIENT_PID_FILE})")
duthost.shell(f"rm -rf {DHCLIENT_PID_FILE}")


@pytest.mark.disable_loganalyzer
def test_static_dns_basic(request, duthost, localhost, mgmt_interfaces):
Expand Down Expand Up @@ -97,13 +114,13 @@ def test_static_dns_basic(request, duthost, localhost, mgmt_interfaces):
if mgmt_interfaces:
verify_nameserver_in_conf_file(duthost, [])
else:
origin_dynamic_nameservers = get_nameserver_from_resolvconf(duthost, file_name=RESOLV_CONF_FILE+".bk")
origin_dynamic_nameservers = get_nameserver_from_resolvconf(duthost, file_name=RESOLV_CONF_FILE + ".bk")
verify_nameserver_in_conf_file(duthost, origin_dynamic_nameservers)


@pytest.mark.usefixtures('static_mgmt_ip_configured')
class TestStaticMgmtPortIP():
def test_dynamic_dns_not_working_when_static_ip_configured(self, duthost):
def test_dynamic_dns_not_working_when_static_ip_configured(self, duthost, stop_dhclient):
"""
Test to verify Dynamic DNS not work when static ip address is configured on the mgmt port
:param duthost: DUT host object
Expand All @@ -120,13 +137,13 @@ def test_dynamic_dns_not_working_when_static_ip_configured(self, duthost):
verify_nameserver_in_conf_file(duthost, [])

with allure.step("Renew dhcp to restore the dns configuration."):
duthost.shell("sudo dhclient")
start_dhclient(duthost)
verify_nameserver_in_conf_file(duthost, [])


@pytest.mark.usefixtures('static_mgmt_ip_not_configured')
class TestDynamicMgmtPortIP():
def test_static_dns_is_not_changing_when_do_dhcp_renew(self, duthost):
def test_static_dns_is_not_changing_when_do_dhcp_renew(self, duthost, stop_dhclient):
"""
Test case to verify Static DNS will not change when do dhcp renew for the mgmt port
:param duthost: DUT host object
Expand All @@ -143,7 +160,7 @@ def test_static_dns_is_not_changing_when_do_dhcp_renew(self, duthost):
verify_nameserver_in_conf_file(duthost, expected_nameservers)

with allure.step("Renew dhcp to restore the dns configuration."):
duthost.shell("sudo dhclient")
start_dhclient(duthost)

with allure.step(f"Verify that {RESOLV_CONF_FILE} is not modified"):
verify_nameserver_in_conf_file(duthost, expected_nameservers)
Expand All @@ -153,7 +170,7 @@ def test_static_dns_is_not_changing_when_do_dhcp_renew(self, duthost):
del_dns_nameserver(duthost, nameserver)

@pytest.mark.usefixtures('static_mgmt_ip_not_configured')
def test_dynamic_dns_working_when_no_static_ip_and_static_dns(self, duthost):
def test_dynamic_dns_working_when_no_static_ip_and_static_dns(self, duthost, stop_dhclient):
"""
The test is to verify Dynamic DNS work as expected when no static ip configured on mgmt port and
static DNS is configured.
Expand Down Expand Up @@ -182,7 +199,7 @@ def test_dynamic_dns_working_when_no_static_ip_and_static_dns(self, duthost):
config_mgmt_ip(duthost, mgmt_interfaces, "remove")

with allure.step("Renew dhcp to restore the dns configuration."):
duthost.shell("sudo dhclient")
start_dhclient(duthost)
verify_nameserver_in_conf_file(duthost, origin_dynamic_nameservers)


Expand Down