1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
import re
import subprocess
import time
import pytest
from unit.applications.lang.python import TestApplicationPython
class TestRespawn(TestApplicationPython):
prerequisites = {'modules': {'python': 'any'}}
PATTERN_ROUTER = 'unit: router'
PATTERN_CONTROLLER = 'unit: controller'
@pytest.fixture(autouse=True)
def setup_method_fixture(self, temp_dir):
self.app_name = f'app-{temp_dir.split("/")[-1]}'
self.load('empty', self.app_name)
assert 'success' in self.conf(
'1', f'applications/{self.app_name}/processes'
)
def pid_by_name(self, name, ppid):
output = subprocess.check_output(['ps', 'ax', '-O', 'ppid']).decode()
m = re.search(fr'\s*(\d+)\s*{ppid}.*{name}', output)
return None if m is None else m.group(1)
def kill_pids(self, *pids):
subprocess.call(['kill', '-9', *pids])
def wait_for_process(self, process, unit_pid):
for _ in range(50):
found = self.pid_by_name(process, unit_pid)
if found is not None:
break
time.sleep(0.1)
return found
def find_proc(self, name, ppid, ps_output):
return re.findall(fr'{ppid}.*{name}', ps_output)
def smoke_test(self, unit_pid):
for _ in range(10):
r = self.conf('1', f'applications/{self.app_name}/processes')
if 'success' in r:
break
time.sleep(0.1)
assert 'success' in r
assert self.get()['status'] == 200
# Check if the only one router, controller,
# and application processes running.
out = subprocess.check_output(['ps', 'ax', '-O', 'ppid']).decode()
assert len(self.find_proc(self.PATTERN_ROUTER, unit_pid, out)) == 1
assert len(self.find_proc(self.PATTERN_CONTROLLER, unit_pid, out)) == 1
assert len(self.find_proc(self.app_name, unit_pid, out)) == 1
def test_respawn_router(self, skip_alert, unit_pid, skip_fds_check):
skip_fds_check(router=True)
pid = self.pid_by_name(self.PATTERN_ROUTER, unit_pid)
self.kill_pids(pid)
skip_alert(fr'process {pid} exited on signal 9')
assert self.wait_for_process(self.PATTERN_ROUTER, unit_pid) is not None
self.smoke_test(unit_pid)
def test_respawn_controller(self, skip_alert, unit_pid, skip_fds_check):
skip_fds_check(controller=True)
pid = self.pid_by_name(self.PATTERN_CONTROLLER, unit_pid)
self.kill_pids(pid)
skip_alert(fr'process {pid} exited on signal 9')
assert (
self.wait_for_process(self.PATTERN_CONTROLLER, unit_pid) is not None
)
assert self.get()['status'] == 200
self.smoke_test(unit_pid)
def test_respawn_application(self, skip_alert, unit_pid):
pid = self.pid_by_name(self.app_name, unit_pid)
self.kill_pids(pid)
skip_alert(fr'process {pid} exited on signal 9')
assert self.wait_for_process(self.app_name, unit_pid) is not None
self.smoke_test(unit_pid)
|
