def set_kdump_service(config, status):
if config and config.get('activate') is False:
# activation of kernel crash dump setup is unwanted
return
calibrated = _kdump_calibrate(
config.get('crash_kernel_high') if config else None,
config.get('crash_kernel_low') if config else None)
grub_defaults_file = '/etc/default/grub'
grub_defaults_data = None
grub_defaults_digest = hashlib.sha256()
with open(grub_defaults_file, 'r') as grub_defaults_handle:
grub_defaults_data = grub_defaults_handle.read()
grub_defaults_digest.update(format(grub_defaults_data).encode())
grub_defaults_shasum_orig = grub_defaults_digest.hexdigest()
grub_defaults_data = re.sub(
r'crashkernel=[0-9]+M,low',
'crashkernel={0}M,low'.format(calibrated['Low']), grub_defaults_data)
grub_defaults_data = re.sub(
r'crashkernel=[0-9]+M,high',
'crashkernel={0}M,high'.format(calibrated['High']), grub_defaults_data)
grub_defaults_digest.update(format(grub_defaults_data).encode())
grub_defaults_shasum_new = grub_defaults_digest.hexdigest()
if grub_defaults_shasum_orig != grub_defaults_shasum_new:
with open(grub_defaults_file, 'w') as grub_defaults_handle:
grub_defaults_handle.write(grub_defaults_data)
status.set_reboot_required()
Command.run(['grub2-mkconfig', '-o', '/boot/grub2/grub.cfg'])
Command.run(['systemctl', 'restart', 'kdump'])
def _search_for(self, name, in_file):
search = '^' + name + ':'
try:
Command.run(['grep', '-q', search, in_file])
except Exception:
return False
return True
def import_repository_sources(packages_config, source_provider):
repo_sources = packages_config.get('repository') or []
import_data = {}
for repository in repo_sources:
repository_name = repository['name']
repository_location = '/var/lib/localrepos/{0}'.format(repository_name)
Path.create(repository_location)
sync_source = repository['source']
if os.path.isdir(sync_source):
# normalize source path for rsync, make sure a '/'
# is appended at the end of the directory specification
# This impacts the behavior of rsync to sync the contents
# of the directory into the new location but not the
# directory itself.
sync_source = os.path.normpath(sync_source)
sync_source += os.sep
Command.run(['rsync', '-zav', sync_source, repository_location])
if repository.get('source_prefix'):
import_data[repository_name] = [
''.join([repository['source_prefix'], repository_location])
]
else:
import_data[repository_name] = [repository_location]
install_items = repository.get('install') or []
import_data[repository_name].append(list(install_items))
return import_data
def write_service_log(install_source):
log_file = os.sep.join([install_source.location, 'workload.log'])
bash_command = ' '.join(
['systemctl', 'status', '-l', '--all', '&>', log_file])
Command.run(['bash', '-c', bash_command], raise_on_error=False)
Command.run(['cp', Defaults.get_log_file(), install_source.location],
raise_on_error=False)
def mount_config_source():
config_type = namedtuple('config_type', ['name', 'location', 'label'])
azure_config = config_type(name=os.path.basename(
Defaults.get_config_file_name()),
location='/mnt',
label='azconfig')
mountpoint_result = Command.run(['mountpoint', azure_config.location],
raise_on_error=False)
if mountpoint_result.returncode == 0:
# The azure_config location is already mounted
return azure_config
lun_result = Command.run([
'mount', '-o', 'sync', '--label', azure_config.label,
azure_config.location
],
raise_on_error=False)
if lun_result.returncode != 0:
iso_result = Command.run(
['mount', '/dev/dvd', azure_config.location],
raise_on_error=False)
if iso_result.returncode != 0:
raise AzureHostedConfigFileSourceMountException(
'Source mount failed with: primary:{0}, fallback{1}'.
format(lun_result.error, iso_result.error))
return azure_config
def main():
"""
Azure Li/Vli config file lookup
Lookup config file as provided by the Azure Li/VLi storage backend
and make it locally available at the location described by
Defaults.get_config_file_name()
"""
Logger.setup()
status = StatusReport('config_lookup')
azure_config = Defaults.mount_config_source()
try:
azure_config_lookup_paths = [azure_config.location]
azure_config_file = Path.which(
azure_config.name, azure_config_lookup_paths
)
if not azure_config_file:
raise AzureHostedConfigFileNotFoundException(
'Config file not found at: {0}/{1}'.format(
azure_config.location, azure_config.name
)
)
Path.create(
os.path.dirname(Defaults.get_config_file_name())
)
Command.run(
['cp', azure_config_file, Defaults.get_config_file_name()]
)
os.chmod(Defaults.get_config_file_name(), 0o600)
status.set_success()
finally:
Defaults.umount_config_source(azure_config)
def user_add(self, user_name, options):
"""
Add user with options
:param str user_name: user name
:param list options: useradd options
"""
Command.run(['useradd'] + options + [user_name])
def user_modify(self, user_name, options):
"""
Modify user with options
:param str user_name: user name
:param list options: usermod options
"""
Command.run(['usermod'] + options + [user_name])
def group_add(self, group_name, options):
"""
Add group with options
:param str group_name: group name
:param list options: groupadd options
"""
Command.run(['groupadd'] + options + [group_name])
def enable_extra_kernel_modules():
modules = Defaults.get_stonith_needed_modules()
file_content = ''
for module in modules:
file_content = ''.join([file_content, os.linesep, module])
Command.run(['modprobe', module])
load_module_path = Defaults.get_extra_kernel_modules_file_name()
_write_file(load_module_path, file_content)
def test_run_raises_error(self, mock_popen, mock_which):
mock_which.return_value = 'command'
mock_process = Mock()
mock_process.communicate = Mock(
return_value=[str.encode('stdout'), str.encode('stderr')]
)
mock_process.returncode = 1
mock_popen.return_value = mock_process
with raises(AzureHostedCommandException):
Command.run(['command', 'args'])
def setup_home_for_user(self, user_name, group_name, home_path):
"""
Setup user home directory
:param str user_name: user name
:param str group_name: group name
:param str home_path: path name
"""
user_and_group = user_name + ':' + group_name
Command.run(['chown', '-R', user_and_group, home_path])
def set_energy_performance_settings():
cpupower_calls = [
# set CPU Frequency/Voltage scaling
['cpupower', 'frequency-set', '-g', 'performance'],
# set low latency and maximum performance
['cpupower', 'set', '-b', '0']
]
for cpupower_call in cpupower_calls:
Command.run(cpupower_call)
_write_boot_local(cpupower_calls)
def main():
"""
Azure Li/Vli storage mount setup
Updates fstab with new storage mount entries and activates
them in the scope of an Azure Li/Vli instance
"""
Logger.setup()
status = StatusReport('storage')
config = RuntimeConfig(Defaults.get_config_file())
storage_config = config.get_storage_config()
storage_errors = []
if storage_config:
fstab_entries = []
for storage in storage_config:
try:
if 'device' not in storage or 'mount' not in storage:
raise AzureHostedStorageMountException(
'At least one of {0} missing in {1}'.format(
('device', 'mount'), storage))
Path.create(storage['mount'])
fstab_entries.append(
'{device} {mount} {fstype} {options} 0 0'.format(
device=storage['device'],
mount=storage['mount'],
fstype=storage.get('file_system') or 'auto',
options=','.join(
storage.get('mount_options', ['defaults']))))
except Exception as issue:
storage_errors.append(issue)
if fstab_entries:
with open('/etc/fstab', 'a') as fstab:
fstab.write(os.linesep)
for entry in fstab_entries:
fstab.write(entry)
fstab.write(os.linesep)
Command.run(['mount', '-a'])
for storage in storage_config:
min_size = storage.get('min_size')
if min_size:
try:
check_storage_size_validates_constraint(
min_size, storage['mount'])
except Exception as issue:
storage_errors.append(issue)
if storage_errors:
raise AzureHostedException(storage_errors)
status.set_success()
def setup_change_password_on_logon(self, user_name):
"""
Setup when a user must change his/her password.
The method sets the number of days when the password was
last changed to zero. This causes a must change password
request on next login
:param str user_name: user name
"""
Command.run(['chage', '-d', '0', user_name])
def test_run_does_not_raise_error(self, mock_popen, mock_which):
mock_which.return_value = 'command'
mock_process = Mock()
mock_process.communicate = Mock(
return_value=[str.encode('stdout'), str.encode('')]
)
mock_process.returncode = 1
mock_popen.return_value = mock_process
result = Command.run(['command', 'args'], os.environ, False)
assert result.error == '(no output on stderr)'
assert result.output == 'stdout'
mock_process.communicate = Mock(
return_value=[str.encode(''), str.encode('stderr')]
)
result = Command.run(['command', 'args'], os.environ, False)
assert result.error == 'stderr'
assert result.output == '(no output on stdout)'
def main():
"""
Azure Li/Vli script call
Calls a custom script in the scope of an Azure Li/Vli instance
"""
Logger.setup()
status = StatusReport('call')
config = RuntimeConfig(Defaults.get_config_file())
call_script = config.get_call_script()
if call_script:
call_source = Defaults.mount_config_source()
Command.run([
'bash', '-c', '{0}/{1}'.format(call_source.location, call_script)
])
status.set_success()
def test_call(self, mock_select, mock_popen, mock_which):
mock_which.return_value = 'command'
mock_select.return_value = [True, False, False]
mock_process = Mock()
mock_popen.return_value = mock_process
call = Command.call(['command', 'args'])
assert call.output_available()
assert call.error_available()
assert call.output == mock_process.stdout
assert call.error == mock_process.stderr
assert call.process == mock_process
def _kdump_calibrate(high, low):
calibration_values = {'Low': low, 'High': high}
if not high and not low:
kdumptool_call = Command.run(['kdumptool', 'calibrate'])
for setting in kdumptool_call.output.split(os.linesep):
try:
(key, value) = setting.split(':')
except Exception:
# ignore setting not in key:value format
pass
calibration_values[key] = int(value)
bash_command = ' '.join(
['lsblk', '|', 'grep', 'disk', '|', 'wc', '-l'])
storage_luns = int(Command.run(['bash', '-c', bash_command]).output)
machine_memory = virtual_memory()
memory_TB = max(1, machine_memory.total / 1024**4)
calibration_values['High'] = int(calibration_values['High'] *
memory_TB + (storage_luns / 2))
return calibration_values
def import_raw_sources(packages_config, source_provider):
raw_sources = packages_config.get('raw')
import_data = {}
if raw_sources:
repository_name = raw_sources['name']
repository_location = '/var/lib/localrepos/{0}'.format(repository_name)
Path.create(repository_location)
bash_command = ' '.join(['rsync', '-zav'] + list(
map(
lambda dir_name: '{0}/{1}/*'.format(source_provider.location,
dir_name),
raw_sources['directory'])) + [repository_location])
Command.run(['bash', '-c', bash_command])
Command.run(['createrepo', repository_location])
import_data[repository_name] = [repository_location]
install_items = []
for package in glob.iglob('{0}/*.rpm'.format(repository_location)):
install_items.append(
Command.run(['rpm', '-qp', '--qf', '%{NAME}', package]).output)
import_data[repository_name].append(list(install_items))
return import_data
def main():
"""
Azure Li/Vli cleanup
Uninstall azure-li-services package and its dependencies
and check for potential reboot request
"""
Logger.setup()
service_reports = Defaults.get_service_reports()
reboot_system = False
all_services_successful = True
for report in service_reports:
if not report.get_state():
# in case a service has unknown or failed state we will
# not consider to reboot the machine
all_services_successful = False
reboot_system = False
break
if report.get_reboot():
reboot_system = True
install_source = Defaults.mount_config_source()
try:
state_file = os.sep.join([
install_source.location,
'workload_success_is_{}'.format(all_services_successful).lower()
])
with open(state_file, 'w'):
pass
if not all_services_successful:
write_service_log(install_source)
finally:
Defaults.umount_config_source(install_source)
Command.run([
'zypper', '--non-interactive', 'remove', '--clean-deps',
'--force-resolution', 'azure-li-services'
])
Command.run(['systemctl', 'reset-failed'])
if reboot_system:
Command.run([
'kexec', '--load', '/boot/vmlinuz', '--initrd', '/boot/initrd',
'--command-line',
get_boot_cmdline()
])
Command.run(['kexec', '--exec'])
def setup_ssh_authorization(user):
if 'ssh-key' in user or 'ssh-private-key' in user:
if user['username'] == 'root':
ssh_auth_dir = '/root/.ssh/'
default_group = 'root'
else:
ssh_auth_dir = '/home/{0}/.ssh/'.format(user['username'])
default_group = 'users'
Path.create(ssh_auth_dir)
group_setup = user['group'] if 'group' in user else {}
uid = pwd.getpwnam(user['username']).pw_uid
gid = grp.getgrnam(group_setup.get('name') or default_group).gr_gid
os.chmod(ssh_auth_dir, 0o700)
if user['username'] != 'root':
os.chown(ssh_auth_dir, uid, gid)
if 'ssh-key' in user:
ssh_auth_file = ssh_auth_dir + 'authorized_keys'
with open(ssh_auth_file, 'a') as ssh:
ssh.write(os.linesep)
ssh.write(user['ssh-key'])
os.chmod(ssh_auth_file, 0o600)
if user['username'] != 'root':
os.chown(ssh_auth_file, uid, gid)
if 'ssh-private-key' in user:
ssh_key_source = Defaults.mount_config_source()
private_key_file = user['ssh-private-key']
Command.run([
'cp',
os.sep.join([ssh_key_source.location, private_key_file]),
ssh_auth_dir
])
ssh_key_file = os.path.normpath(
os.sep.join([ssh_auth_dir,
os.path.basename(private_key_file)]))
os.chmod(ssh_key_file, 0o600)
if user['username'] != 'root':
os.chown(ssh_key_file, uid, gid)
def test_run(self, mock_popen, mock_exists, mock_access):
mock_exists.return_value = True
command_run = namedtuple(
'command', ['output', 'error', 'returncode']
)
run_result = command_run(
output='stdout',
error='stderr',
returncode=0
)
mock_process = Mock()
mock_process.communicate = Mock(
return_value=[str.encode('stdout'), str.encode('stderr')]
)
mock_process.returncode = 0
mock_popen.return_value = mock_process
mock_access.return_value = True
assert Command.run(['command', 'args']) == run_result
def main():
"""
Azure Li/Vli package installation
Creates a local rpm-md repository and registers it with zypper.
Installs all packages configured in the scope of an Azure
Li/Vli instance
"""
Logger.setup()
status = StatusReport('install')
config = RuntimeConfig(Defaults.get_config_file())
packages_config = config.get_packages_config()
if packages_config:
install_source = Defaults.mount_config_source()
local_repos = {}
local_repos.update(import_raw_sources(packages_config, install_source))
local_repos.update(
import_repository_sources(packages_config, install_source))
for repository_name, repository_metadata in local_repos.items():
repository_location = repository_metadata[0]
Command.run(['zypper', 'removerepo', repository_name],
raise_on_error=False)
Command.run([
'zypper', 'addrepo', '--no-gpgcheck', repository_location,
repository_name
])
packages_to_install = []
for repository_metadata in local_repos.values():
packages_to_install += repository_metadata[1]
if packages_to_install:
Command.run([
'zypper', '--non-interactive', 'install',
'--auto-agree-with-licenses'
] + list(filter(None, packages_to_install)))
status.set_success()
def test_run_does_not_raise_error_if_command_not_found(self, mock_which):
mock_which.return_value = None
result = Command.run(['command', 'args'], os.environ, False)
assert result.error is None
assert result.output is None
assert result.returncode == -1
def test_run_command_does_not_exist(self):
with raises(AzureHostedCommandNotFoundException):
Command.run(['does-not-exist'])
def set_saptune_service():
Command.run(['saptune', 'daemon', 'start'])
Command.run(['saptune', 'solution', 'apply', 'HANA'])
def set_stonith_service(config):
logger = logging.getLogger('Azure_LI_Services')
# 1. setup InitiatorName
initiator_name = 'iqn.1996-04.de.suse:01:{0}'.format(
config['initiatorname'])
initiator_file = '/etc/iscsi/initiatorname.iscsi'
initiator_data = re.sub(r'InitiatorName=.*',
'InitiatorName={0}'.format(initiator_name),
_read_file(initiator_file))
_write_file(initiator_file, initiator_data)
# 2. setup iscsi options
iscsi_conf = '/etc/iscsi/iscsid.conf'
iscsi_conf_data = _read_file(iscsi_conf)
iscsi_conf_data = re.sub(r'node.session.timeo.replacement_timeout = .*',
'node.session.timeo.replacement_timeout = 5',
iscsi_conf_data)
iscsi_conf_data = re.sub(r'node.startup = .*', 'node.startup = automatic',
iscsi_conf_data)
_write_file(iscsi_conf, iscsi_conf_data)
# 3. initialize iSCSI devices
discovery_output = Command.run([
'iscsiadm', '-m', 'discovery', '-t', 'st', '-p',
'{0}:3260'.format(config['ip'])
]).output.splitlines()
# 4. create sbd device
# The first line of the iscsiadm discovery output is taken into
# account as we expect any group tag to respond with the same
# target name. We also expect the discovery output to be in the
# format: target_IP:port,target_portal_group_tag proper_target_name
discovery_format = '.*:.*,.* .*'
udev_settle_timeout = '30'
sbd_max_attempts = 3
sbd_nop_time_sec = 2
sbd_setup_successful = False
if discovery_output and re.match(discovery_format, discovery_output[0]):
target_name = discovery_output[0].split(' ')[1]
target_device = '/dev/disk/by-path/ip-{0}:3260-iscsi-{1}-lun-0'.format(
config['ip'], target_name)
Command.run(['iscsiadm', '-m', 'node', '-l'])
Command.run(['rescan-scsi-bus.sh'])
Command.run(['systemctl', 'restart', 'iscsi'])
Command.run(['systemctl', 'restart', 'iscsid'])
Command.run(
['udevadm', 'settle', '--timeout={0}'.format(udev_settle_timeout)])
for try_count in range(sbd_max_attempts):
logger.info('SBD setup try[{0}]'.format(try_count))
try:
Command.run(['sbd', '-d', target_device, 'create'])
Command.run(['sbd', '-d', target_device, 'dump'])
sbd_setup_successful = True
except Exception as issue:
logger.error(
'SBD setup failed with: {0}: Retry in {1}sec'.format(
issue, sbd_nop_time_sec))
time.sleep(sbd_nop_time_sec)
else:
break
if not sbd_setup_successful:
raise AzureHostedCommandOutputException(
'Stonith: SBD setup failed')
_write_file('/etc/sysconfig/sbd',
'SBD_DEVICE="{0}"'.format(target_device))
else:
raise AzureHostedCommandOutputException(
'Stonith: Unexpected iSCSI discovery information: {0}'.format(
discovery_output))
def set_hostname(hostname):
Command.run(['hostnamectl', 'set-hostname', hostname])
def test_call_command_does_not_exist(self):
with raises(AzureHostedCommandNotFoundException):
Command.call(['does-not-exist'], os.environ)
