def setup(self):
if not systemd.is_systemd():
logger.warn("Did not detect Systemd, unable to set {0}".format(
self._network_setup_service_name))
return
if self._is_firewall_service_running():
logger.info(
"Firewalld.service present on the VM, setting up permanent rules on the VM"
)
# In case of a failure, this would throw. In such a case, we don't need to try to setup our custom service
# because on system reboot, all iptable rules are reset by firewalld.service so it would be a no-op.
self._setup_permanent_firewalld_rules()
# Remove custom service if exists to avoid problems with firewalld
try:
fileutil.rm_files(*[
self.get_service_file_path(),
os.path.join(conf.get_lib_dir(), self.BINARY_FILE_NAME)
])
except Exception as error:
logger.info(
"Unable to delete existing service {0}: {1}".format(
self._network_setup_service_name, ustr(error)))
return
logger.info(
"Firewalld service not running/unavailable, trying to set up {0}".
format(self._network_setup_service_name))
self._setup_network_setup_service()
def test_remove_files(self):
import random
import string
import glob
random_word = lambda: ''.join(
random.choice(string.ascii_uppercase + string.digits)
for _ in range(5))
#Create 10 test files
test_file = os.path.join(self.tmp_dir, self.test_file)
test_file2 = os.path.join(self.tmp_dir, 'another_file')
test_files = [test_file + random_word() for _ in range(5)] + \
[test_file2 + random_word() for _ in range(5)]
for file in test_files:
open(file, 'a').close()
#Remove files using fileutil.rm_files
test_file_pattern = test_file + '*'
test_file_pattern2 = test_file2 + '*'
fileutil.rm_files(test_file_pattern, test_file_pattern2)
self.assertEqual(
0, len(glob.glob(os.path.join(self.tmp_dir, test_file_pattern))))
self.assertEqual(
0, len(glob.glob(os.path.join(self.tmp_dir, test_file_pattern2))))
def reg_ssh_host_key(self):
keypair_type = conf.get_ssh_host_keypair_type()
if conf.get_regenerate_ssh_host_key():
fileutil.rm_files(conf.get_ssh_key_glob())
keygen_cmd = "ssh-keygen -N '' -t {0} -f {1}"
shellutil.run(keygen_cmd.format(keypair_type,
conf.get_ssh_key_private_path()))
return self.get_ssh_host_key_thumbprint()
def reg_ssh_host_key(self):
keypair_type = conf.get_ssh_host_keypair_type()
if conf.get_regenerate_ssh_host_key():
fileutil.rm_files("/etc/ssh/ssh_host_*key*")
keygen_cmd = "ssh-keygen -N '' -t {0} -f /etc/ssh/ssh_host_{1}_key"
shellutil.run(keygen_cmd.format(keypair_type, keypair_type))
thumbprint = self.get_ssh_host_key_thumbprint(keypair_type)
return thumbprint
def reg_ssh_host_key(self):
keypair_type = conf.get_ssh_host_keypair_type()
if conf.get_regenerate_ssh_host_key():
fileutil.rm_files("/etc/ssh/ssh_host_*key*")
keygen_cmd = "ssh-keygen -N '' -t {0} -f /etc/ssh/ssh_host_{1}_key"
shellutil.run(keygen_cmd.format(keypair_type, keypair_type))
thumbprint = self.get_ssh_host_key_thumbprint(keypair_type)
return thumbprint
def del_resolv():
if os.path.realpath('/etc/resolv.conf') != '/run/resolvconf/resolv.conf':
logger.info("resolvconf is not configured. Removing /etc/resolv.conf")
fileutil.rm_files('/etc/resolv.conf')
else:
logger.info("resolvconf is enabled; leaving /etc/resolv.conf intact")
fileutil.rm_files('/etc/resolvconf/resolv.conf.d/tail',
'/etc/resolvconf/resolv.conf.d/originial')
def reg_ssh_host_key(self):
keypair_type = conf.get_ssh_host_keypair_type()
if conf.get_regenerate_ssh_host_key():
fileutil.rm_files(conf.get_ssh_key_glob())
keygen_cmd = "ssh-keygen -N '' -t {0} -f {1}"
shellutil.run(
keygen_cmd.format(keypair_type,
conf.get_ssh_key_private_path()))
return self.get_ssh_host_key_thumbprint()
def remove_extension_cgroups(self, extension_name):
# For transient units, cgroups are released automatically when the unit stops, so it is sufficient
# to call stop on them. Persistent cgroups are released when the unit is disabled and its configuration
# file is deleted.
# The assumption is that this method is called after the extension has been uninstalled. For now, since
# we're running extensions within transient scopes which clean up after they finish running, no removal
# of units is needed. In the future, when the extension is running under its own slice,
# the following clean up is needed.
unit_filename = self._get_extension_slice_name(extension_name)
try:
unit_path = os.path.join(UNIT_FILES_FILE_SYSTEM_PATH, unit_filename)
shellutil.run_command(["systemctl", "stop", unit_filename])
fileutil.rm_files(unit_path)
shellutil.run_command(["systemctl", "daemon-reload"])
except Exception as e:
raise CGroupsException("Failed to remove {0}. Error: {1}".format(unit_filename, ustr(e)))
def reg_ssh_host_key(self):
keypair_type = conf.get_ssh_host_keypair_type()
if conf.get_regenerate_ssh_host_key():
fileutil.rm_files(conf.get_ssh_key_glob())
if conf.get_ssh_host_keypair_mode() == "auto":
'''
The -A option generates all supported key types.
This is supported since OpenSSH 5.9 (2011).
'''
shellutil.run("ssh-keygen -A")
else:
keygen_cmd = "ssh-keygen -N '' -t {0} -f {1}"
shellutil.run(keygen_cmd.
format(keypair_type,
conf.get_ssh_key_private_path()))
return self.get_ssh_host_key_thumbprint()
def reg_ssh_host_key(self):
keypair_type = conf.get_ssh_host_keypair_type()
if conf.get_regenerate_ssh_host_key():
fileutil.rm_files(conf.get_ssh_key_glob())
if conf.get_ssh_host_keypair_mode() == "auto":
'''
The -A option generates all supported key types.
This is supported since OpenSSH 5.9 (2011).
'''
shellutil.run("ssh-keygen -A")
else:
keygen_cmd = "ssh-keygen -N '' -t {0} -f {1}"
shellutil.run(
keygen_cmd.format(keypair_type,
conf.get_ssh_key_private_path()))
return self.get_ssh_host_key_thumbprint()
def test_remove_files(self):
random_word = lambda : ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(5))
#Create 10 test files
test_file = os.path.join(self.tmp_dir, self.test_file)
test_file2 = os.path.join(self.tmp_dir, 'another_file')
test_files = [test_file + random_word() for _ in range(5)] + \
[test_file2 + random_word() for _ in range(5)]
for file in test_files:
open(file, 'a').close()
#Remove files using fileutil.rm_files
test_file_pattern = test_file + '*'
test_file_pattern2 = test_file2 + '*'
fileutil.rm_files(test_file_pattern, test_file_pattern2)
self.assertEqual(0, len(glob.glob(os.path.join(self.tmp_dir, test_file_pattern))))
self.assertEqual(0, len(glob.glob(os.path.join(self.tmp_dir, test_file_pattern2))))
def tearDown(self):
rm_dirs(self.root_collect_dir)
rm_files(self.compressed_archive_path)
AgentTestCase.tearDown(self)
def test_log_collector_should_clean_up_uncollected_truncated_files(self):
# Make sure that truncated files that are no longer needed are cleaned up. If an existing truncated file
# from a previous run is not collected in the current run, it should be deleted to free up space.
# Specify files that have priority. The list is ordered, where the first entry has the highest priority.
must_collect_files = [os.path.join(self.root_collect_dir, "waagent*")]
# Set the archive size limit so that not all files can be collected. In that case, files will be added to the
# archive according to their priority.
# Set the size limit so that only two files can be collected, of which one needs to be truncated.
with patch(
"azurelinuxagent.common.logcollector._UNCOMPRESSED_ARCHIVE_SIZE_LIMIT",
2 * SMALL_FILE_SIZE):
with patch(
"azurelinuxagent.common.logcollector._MUST_COLLECT_FILES",
must_collect_files):
with patch(
"azurelinuxagent.common.logcollector._FILE_SIZE_LIMIT",
SMALL_FILE_SIZE):
log_collector = LogCollector()
archive = log_collector.collect_logs_and_get_archive()
self._assert_archive_created(archive)
expected_files = [
os.path.join(self.root_collect_dir, "waagent.log"),
self._truncated_path(
os.path.join(
self.root_collect_dir,
"waagent.log.1")), # this file should be truncated
]
self._assert_files_are_in_archive(expected_files)
no_files = self._get_number_of_files_in_archive()
self.assertEqual(
2, no_files,
"Expected 2 files in archive, found {0}!".format(no_files))
# Remove the original file so it is not collected anymore. In the next collection, the truncated file should be
# removed both from the archive and from the filesystem.
rm_files(os.path.join(self.root_collect_dir, "waagent.log.1"))
with patch(
"azurelinuxagent.common.logcollector._UNCOMPRESSED_ARCHIVE_SIZE_LIMIT",
2 * SMALL_FILE_SIZE):
with patch(
"azurelinuxagent.common.logcollector._MUST_COLLECT_FILES",
must_collect_files):
with patch(
"azurelinuxagent.common.logcollector._FILE_SIZE_LIMIT",
SMALL_FILE_SIZE):
log_collector = LogCollector()
second_archive = log_collector.collect_logs_and_get_archive(
)
expected_files = [
os.path.join(self.root_collect_dir, "waagent.log"),
os.path.join(self.root_collect_dir, "waagent.log.2.gz"),
]
unexpected_files = [
self._truncated_path(
os.path.join(self.root_collect_dir, "waagent.log.1"))
]
self._assert_files_are_in_archive(expected_files)
self._assert_files_are_not_in_archive(unexpected_files)
self._assert_archive_created(second_archive)
no_files = self._get_number_of_files_in_archive()
self.assertEqual(
2, no_files,
"Expected 2 files in archive, found {0}!".format(no_files))
truncated_files = os.listdir(self.truncated_files_dir)
self.assertEqual(
0, len(truncated_files),
"Uncollected truncated file waagent.log.1 should have been deleted!"
)
def test_log_collector_should_update_archive_when_files_are_new_or_modified_or_deleted(
self):
# Ensure the archive reflects the state of files on the disk at collection time. If a file was updated, it
# needs to be updated in the archive, deleted if removed from disk, and added if not previously seen.
log_collector = LogCollector()
first_archive = log_collector.collect_logs_and_get_archive()
self._assert_archive_created(first_archive)
# Everything should be in the archive
expected_files = [
os.path.join(self.root_collect_dir, "waagent.log"),
os.path.join(self.root_collect_dir, "waagent.log.1"),
os.path.join(self.root_collect_dir, "waagent.log.2.gz"),
os.path.join(self.root_collect_dir, "waagent.log.3.gz"),
os.path.join(self.root_collect_dir, "less_important_file"),
os.path.join(self.root_collect_dir, "another_dir",
"least_important_file")
]
self._assert_files_are_in_archive(expected_files)
no_files = self._get_number_of_files_in_archive()
self.assertEqual(
6, no_files,
"Expected 6 files in archive, found {0}!".format(no_files))
# Update a file and its last modified time to ensure the last modified time and last collection time are not
# the same in this test
file_to_update = os.path.join(self.root_collect_dir, "waagent.log")
self._create_file_of_specific_size(
file_to_update, LARGE_FILE_SIZE) # update existing file
new_time = os.path.getmtime(file_to_update) + 5
os.utime(file_to_update, (new_time, new_time))
# Create a new file (that is covered by the manifest and will be collected) and delete a file
self._create_file_of_specific_size(
os.path.join(self.root_collect_dir, "less_important_file.1"),
LARGE_FILE_SIZE)
rm_files(os.path.join(self.root_collect_dir, "waagent.log.1"))
second_archive = log_collector.collect_logs_and_get_archive()
self._assert_archive_created(second_archive)
expected_files = [
os.path.join(self.root_collect_dir, "waagent.log"),
os.path.join(self.root_collect_dir, "waagent.log.2.gz"),
os.path.join(self.root_collect_dir, "waagent.log.3.gz"),
os.path.join(self.root_collect_dir, "less_important_file"),
os.path.join(self.root_collect_dir, "less_important_file.1"),
os.path.join(self.root_collect_dir, "another_dir",
"least_important_file")
]
unexpected_files = [
os.path.join(self.root_collect_dir, "waagent.log.1")
]
self._assert_files_are_in_archive(expected_files)
self._assert_files_are_not_in_archive(unexpected_files)
file = os.path.join(self.root_collect_dir, "waagent.log") # pylint: disable=redefined-builtin
new_file_size = self._get_uncompressed_file_size(file)
self.assertEqual(
LARGE_FILE_SIZE, new_file_size,
"File {0} hasn't been updated! Size in archive is {1}, but "
"should be {2}.".format(file, new_file_size, LARGE_FILE_SIZE))
no_files = self._get_number_of_files_in_archive()
self.assertEqual(
6, no_files,
"Expected 6 files in archive, found {0}!".format(no_files))
def test_log_collector_should_prioritize_important_files_if_archive_too_big(
self):
# Set the archive size limit so that not all files can be collected. In that case, files will be added to the
# archive according to their priority.
# Specify files that have priority. The list is ordered, where the first entry has the highest priority.
must_collect_files = [
os.path.join(self.root_collect_dir, "waagent*"),
os.path.join(self.root_collect_dir, "less_important_file*")
]
with patch(
"azurelinuxagent.common.logcollector._UNCOMPRESSED_ARCHIVE_SIZE_LIMIT",
10 * 1024 * 1024):
with patch(
"azurelinuxagent.common.logcollector._MUST_COLLECT_FILES",
must_collect_files):
log_collector = LogCollector()
archive = log_collector.collect_logs_and_get_archive()
self._assert_archive_created(archive)
expected_files = [
os.path.join(self.root_collect_dir, "waagent.log"),
os.path.join(self.root_collect_dir, "waagent.log.1"),
os.path.join(self.root_collect_dir, "waagent.log.2.gz")
]
unexpected_files = [
os.path.join(self.root_collect_dir, "waagent.log.3.gz"),
os.path.join(self.root_collect_dir, "less_important_file"),
os.path.join(self.root_collect_dir, "another_dir",
"least_important_file")
]
self._assert_files_are_in_archive(expected_files)
self._assert_files_are_not_in_archive(unexpected_files)
no_files = self._get_number_of_files_in_archive()
self.assertEqual(
3, no_files,
"Expected 3 files in archive, found {0}!".format(no_files))
# Second collection, if a file got deleted, delete it from the archive and add next file on the priority list
# if there is enough space.
rm_files(os.path.join(self.root_collect_dir, "waagent.log.3.gz"))
with patch(
"azurelinuxagent.common.logcollector._UNCOMPRESSED_ARCHIVE_SIZE_LIMIT",
10 * 1024 * 1024):
with patch(
"azurelinuxagent.common.logcollector._MUST_COLLECT_FILES",
must_collect_files):
second_archive = log_collector.collect_logs_and_get_archive()
expected_files = [
os.path.join(self.root_collect_dir, "waagent.log"),
os.path.join(self.root_collect_dir, "waagent.log.1"),
os.path.join(self.root_collect_dir, "waagent.log.2.gz"),
os.path.join(self.root_collect_dir, "less_important_file"),
os.path.join(self.root_collect_dir, "another_dir",
"least_important_file")
]
unexpected_files = [
os.path.join(self.root_collect_dir, "waagent.log.3.gz")
]
self._assert_files_are_in_archive(expected_files)
self._assert_files_are_not_in_archive(unexpected_files)
self._assert_archive_created(second_archive)
no_files = self._get_number_of_files_in_archive()
self.assertEqual(
5, no_files,
"Expected 5 files in archive, found {0}!".format(no_files))
