def test__get_config__returns_a_value_given_a_key(self):
# Setup
mock_framework = create_autospec(self.create_framework(),
spec_set=True)
mock_key = str(uuid4())
mock_value = str(uuid4())
mock_framework.model.config = {mock_key: mock_value}
# Exercise
adapter = FrameworkAdapter(mock_framework)
value = adapter.get_config(mock_key)
# Assert
assert value == mock_value
def test__get_config__returns_the_config_dict_when_no_key_given(self):
# Setup
mock_framework = create_autospec(self.create_framework(),
spec_set=True)
mock_config = {
str(uuid4()): str(uuid4()),
str(uuid4()): str(uuid4()),
str(uuid4()): str(uuid4()),
str(uuid4()): str(uuid4()),
}
mock_framework.model.config = mock_config
# Exercise
adapter = FrameworkAdapter(mock_framework)
config = adapter.get_config()
# Assert
assert config == mock_config
class SlurmSnapInstanceManager(Object):
"""
responsible for installing the slurm_snap, connecting to network, and
setting the snap mode
"""
_stored = StoredState()
on = SlurmSnapInstanceManagerEvents()
logger = logging.getLogger()
MUNGE_KEY_PATH = Path("/var/snap/slurm/common/etc/munge/munge.key")
SLURM_CONFIGURATOR_TEMPLATES_DIR = Path(
"/var/snap/slurm/common/etc/slurm-configurator")
TEMPLATE_DIR = Path(f"{os.getcwd()}/templates")
def __init__(self, charm, key):
super().__init__(charm, key)
self.snap_mode = key
self.fw_adapter = FrameworkAdapter(self.framework)
# Set the template and config file paths based on the snap.mode.
# Throw an exception if initialized with an unsupported snap.mode.
if self.snap_mode == "slurmdbd":
self.slurm_config_yaml = self.SLURM_CONFIGURATOR_TEMPLATES_DIR / 'slurmdbd.yaml'
self.slurm_config_template = self.TEMPLATE_DIR / 'slurmdbd.yaml.tmpl'
elif self.snap_mode in ["slurmd", "slurmrestd", "slurmctld"]:
self.slurm_config_yaml = self.SLURM_CONFIGURATOR_TEMPLATES_DIR / 'slurm.yaml'
self.slurm_config_template = self.TEMPLATE_DIR / 'slurm.yaml.tmpl'
else:
self.logger.error(
f"Slurm component not supported: {self.snap_mode}",
exc_info=True)
@property
def _hostname(self):
return socket.gethostname().split(".")[0]
def set_snap_mode(self):
"""Set the snap mode, thorw an exception if it fails.
"""
try:
subprocess.call([
"snap",
"set",
"slurm",
f"snap.mode={self.snap_mode}",
])
except subprocess.CalledProcessError as e:
self.logger.error(
f"Setting the snap.mode failed. snap.mode={self.snap_mode} - {e}",
exc_info=True)
def install(self):
self._install_snap()
self._snap_connect()
def _snap_connect(self, slot=None):
connect_commands = [
["snap", "connect", "slurm:network-control"],
["snap", "connect", "slurm:system-observe"],
["snap", "connect", "slurm:hardware-observe"],
]
for connect_command in connect_commands:
if slot:
connect_command.append(slot)
try:
subprocess.call(connect_command)
except subprocess.CalledProcessError as e:
self.logger.error(
f"Could not connect snap interface: {e}",
exc_info=True,
)
def _install_snap(self):
snap_install_cmd = ["snap", "install"]
resource_path = None
try:
resource_path = self.model.resources.fetch('slurm')
except ModelError as e:
logger.error(
f"Resource could not be found when executing: {e}",
exc_info=True,
)
if resource_path:
snap_install_cmd.append(resource_path)
snap_install_cmd.append("--dangerous")
else:
snap_store_channel = self.fw_adapter.get_config(
"snap-store-channel")
snap_install_cmd.append("slurm")
snap_install_cmd.append(f"--{snap_store_channel}")
try:
subprocess.call(snap_install_cmd)
except subprocess.CalledProcessError as e:
logger.error(
f"Could not install the slurm snap using the command: {e}",
exc_info=True)
def write_munge_key(self, munge_key):
munge = b64decode(munge_key.encode())
self.MUNGE_KEY_PATH.write_bytes(munge)
def write_config(self, context):
ctxt = {}
source = self.slurm_config_template
target = self.slurm_config_yaml
if not type(context) == dict:
self.framework.set_unit_status(
MaintenanceStatus("context not of type dict"))
return
else:
ctxt = {**{"hostname": self._hostname}, **context}
if not source.exists():
# raise Exception(f"Source config {source} does not exist - Please debug.")
self.framework.set_unit_status(
MaintenanceStatus("source doesn't exist"))
if target.exists():
target.unlink()
target.write_text(source.read_text().format(**ctxt))
