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|
import grp
import os
import pwd
import shutil
import pytest
from conftest import option
from conftest import unit_run
from conftest import unit_stop
from unit.applications.lang.go import TestApplicationGo
from unit.feature.isolation import TestFeatureIsolation
class TestGoIsolation(TestApplicationGo):
prerequisites = {'modules': {'go': 'any'}, 'features': ['isolation']}
isolation = TestFeatureIsolation()
@classmethod
def setup_class(cls, complete_check=True):
check = super().setup_class(complete_check=False)
unit = unit_run()
option.temp_dir = unit['temp_dir']
TestFeatureIsolation().check(option.available, unit['temp_dir'])
assert unit_stop() is None
shutil.rmtree(unit['temp_dir'])
return check if not complete_check else check()
def unpriv_creds(self):
nobody_uid = pwd.getpwnam('nobody').pw_uid
try:
nogroup_gid = grp.getgrnam('nogroup').gr_gid
nogroup = 'nogroup'
except KeyError:
nogroup_gid = grp.getgrnam('nobody').gr_gid
nogroup = 'nobody'
return (nobody_uid, nogroup_gid, nogroup)
def isolation_key(self, key):
return key in option.available['features']['isolation'].keys()
def test_isolation_values(self):
self.load('ns_inspect')
obj = self.getjson()['body']
for ns, ns_value in option.available['features']['isolation'].items():
if ns.upper() in obj['NS']:
assert obj['NS'][ns.upper()] == ns_value, '%s match' % ns
def test_isolation_unpriv_user(self, is_su):
if not self.isolation_key('unprivileged_userns_clone'):
pytest.skip('unprivileged clone is not available')
if is_su:
pytest.skip('privileged tests, skip this')
self.load('ns_inspect')
obj = self.getjson()['body']
assert obj['UID'] == os.geteuid(), 'uid match'
assert obj['GID'] == os.getegid(), 'gid match'
self.load('ns_inspect', isolation={'namespaces': {'credential': True}})
obj = self.getjson()['body']
nobody_uid, nogroup_gid, nogroup = self.unpriv_creds()
# unprivileged unit map itself to nobody in the container by default
assert obj['UID'] == nobody_uid, 'uid of nobody'
assert obj['GID'] == nogroup_gid, 'gid of %s' % nogroup
self.load(
'ns_inspect',
user='root',
isolation={'namespaces': {'credential': True}},
)
obj = self.getjson()['body']
assert obj['UID'] == 0, 'uid match user=root'
assert obj['GID'] == 0, 'gid match user=root'
self.load(
'ns_inspect',
user='root',
group=nogroup,
isolation={'namespaces': {'credential': True}},
)
obj = self.getjson()['body']
assert obj['UID'] == 0, 'uid match user=root group=nogroup'
assert obj['GID'] == nogroup_gid, 'gid match user=root group=nogroup'
self.load(
'ns_inspect',
user='root',
group='root',
isolation={
'namespaces': {'credential': True},
'uidmap': [{'container': 0, 'host': os.geteuid(), 'size': 1}],
'gidmap': [{'container': 0, 'host': os.getegid(), 'size': 1}],
},
)
obj = self.getjson()['body']
assert obj['UID'] == 0, 'uid match uidmap'
assert obj['GID'] == 0, 'gid match gidmap'
def test_isolation_priv_user(self, is_su):
if not is_su:
pytest.skip('unprivileged tests, skip this')
self.load('ns_inspect')
nobody_uid, nogroup_gid, nogroup = self.unpriv_creds()
obj = self.getjson()['body']
assert obj['UID'] == nobody_uid, 'uid match'
assert obj['GID'] == nogroup_gid, 'gid match'
self.load('ns_inspect', isolation={'namespaces': {'credential': True}})
obj = self.getjson()['body']
# privileged unit map app creds in the container by default
assert obj['UID'] == nobody_uid, 'uid nobody'
assert obj['GID'] == nogroup_gid, 'gid nobody'
self.load(
'ns_inspect',
user='root',
isolation={'namespaces': {'credential': True}},
)
obj = self.getjson()['body']
assert obj['UID'] == 0, 'uid nobody user=root'
assert obj['GID'] == 0, 'gid nobody user=root'
self.load(
'ns_inspect',
user='root',
group=nogroup,
isolation={'namespaces': {'credential': True}},
)
obj = self.getjson()['body']
assert obj['UID'] == 0, 'uid match user=root group=nogroup'
assert obj['GID'] == nogroup_gid, 'gid match user=root group=nogroup'
self.load(
'ns_inspect',
user='root',
group='root',
isolation={
'namespaces': {'credential': True},
'uidmap': [{'container': 0, 'host': 0, 'size': 1}],
'gidmap': [{'container': 0, 'host': 0, 'size': 1}],
},
)
obj = self.getjson()['body']
assert obj['UID'] == 0, 'uid match uidmap user=root'
assert obj['GID'] == 0, 'gid match gidmap user=root'
# map 65535 uids
self.load(
'ns_inspect',
user='nobody',
isolation={
'namespaces': {'credential': True},
'uidmap': [
{'container': 0, 'host': 0, 'size': nobody_uid + 1}
],
},
)
obj = self.getjson()['body']
assert obj['UID'] == nobody_uid, 'uid match uidmap user=nobody'
assert obj['GID'] == nogroup_gid, 'gid match uidmap user=nobody'
def test_isolation_mnt(self):
if not self.isolation_key('mnt'):
pytest.skip('mnt namespace is not supported')
if not self.isolation_key('unprivileged_userns_clone'):
pytest.skip('unprivileged clone is not available')
self.load(
'ns_inspect',
isolation={'namespaces': {'mount': True, 'credential': True}},
)
obj = self.getjson()['body']
# all but user and mnt
allns = list(option.available['features']['isolation'].keys())
allns.remove('user')
allns.remove('mnt')
for ns in allns:
if ns.upper() in obj['NS']:
assert (
obj['NS'][ns.upper()]
== option.available['features']['isolation'][ns]
), ('%s match' % ns)
assert obj['NS']['MNT'] != self.isolation.getns('mnt'), 'mnt set'
assert obj['NS']['USER'] != self.isolation.getns('user'), 'user set'
def test_isolation_pid(self, is_su):
if not self.isolation_key('pid'):
pytest.skip('pid namespace is not supported')
if not is_su:
if not self.isolation_key('unprivileged_userns_clone'):
pytest.skip('unprivileged clone is not available')
if not self.isolation_key('user'):
pytest.skip('user namespace is not supported')
if not self.isolation_key('mnt'):
pytest.skip('mnt namespace is not supported')
isolation = {'namespaces': {'pid': True}}
if not is_su:
isolation['namespaces']['mount'] = True
isolation['namespaces']['credential'] = True
self.load('ns_inspect', isolation=isolation)
obj = self.getjson()['body']
assert obj['PID'] == 1, 'pid of container is 1'
def test_isolation_namespace_false(self):
self.load('ns_inspect')
allns = list(option.available['features']['isolation'].keys())
remove_list = ['unprivileged_userns_clone', 'ipc', 'cgroup']
allns = [ns for ns in allns if ns not in remove_list]
namespaces = {}
for ns in allns:
if ns == 'user':
namespaces['credential'] = False
elif ns == 'mnt':
namespaces['mount'] = False
elif ns == 'net':
namespaces['network'] = False
elif ns == 'uts':
namespaces['uname'] = False
else:
namespaces[ns] = False
self.load('ns_inspect', isolation={'namespaces': namespaces})
obj = self.getjson()['body']
for ns in allns:
if ns.upper() in obj['NS']:
assert (
obj['NS'][ns.upper()]
== option.available['features']['isolation'][ns]
), ('%s match' % ns)
def test_go_isolation_rootfs_container(self, is_su, temp_dir):
if not is_su:
if not self.isolation_key('unprivileged_userns_clone'):
pytest.skip('unprivileged clone is not available')
if not self.isolation_key('user'):
pytest.skip('user namespace is not supported')
if not self.isolation_key('mnt'):
pytest.skip('mnt namespace is not supported')
if not self.isolation_key('pid'):
pytest.skip('pid namespace is not supported')
isolation = {'rootfs': temp_dir}
if not is_su:
isolation['namespaces'] = {
'mount': True,
'credential': True,
'pid': True
}
self.load('ns_inspect', isolation=isolation)
obj = self.getjson(url='/?file=/go/app')['body']
assert obj['FileExists'] == True, 'app relative to rootfs'
obj = self.getjson(url='/?file=/bin/sh')['body']
assert obj['FileExists'] == False, 'file should not exists'
def test_go_isolation_rootfs_container_priv(self, is_su, temp_dir):
if not is_su:
pytest.skip('requires root')
if not self.isolation_key('mnt'):
pytest.skip('mnt namespace is not supported')
isolation = {
'namespaces': {'mount': True},
'rootfs': temp_dir,
}
self.load('ns_inspect', isolation=isolation)
obj = self.getjson(url='/?file=/go/app')['body']
assert obj['FileExists'] == True, 'app relative to rootfs'
obj = self.getjson(url='/?file=/bin/sh')['body']
assert obj['FileExists'] == False, 'file should not exists'
def test_go_isolation_rootfs_automount_tmpfs(self, is_su, temp_dir):
try:
open("/proc/self/mountinfo")
except:
pytest.skip('The system lacks /proc/self/mountinfo file')
if not is_su:
if not self.isolation_key('unprivileged_userns_clone'):
pytest.skip('unprivileged clone is not available')
if not self.isolation_key('user'):
pytest.skip('user namespace is not supported')
if not self.isolation_key('mnt'):
pytest.skip('mnt namespace is not supported')
if not self.isolation_key('pid'):
pytest.skip('pid namespace is not supported')
isolation = {'rootfs': temp_dir}
if not is_su:
isolation['namespaces'] = {
'mount': True,
'credential': True,
'pid': True
}
self.load('ns_inspect', isolation=isolation)
obj = self.getjson(url='/?mounts=true')['body']
assert (
"/ /tmp" in obj['Mounts'] and "tmpfs" in obj['Mounts']
), 'app has /tmp mounted on /'
isolation['automount'] = {
'tmpfs': False
}
self.load('ns_inspect', isolation=isolation)
obj = self.getjson(url='/?mounts=true')['body']
assert (
"/ /tmp" not in obj['Mounts'] and "tmpfs" not in obj['Mounts']
), 'app has no /tmp mounted'
|
