feat: generate charm dellpowervault

sunbeam-python/sunbeam/storage/backends/dellpowervault/__init__.py

@@ -0,0 +1,4 @@
+# SPDX-FileCopyrightText: 2026 - Canonical Ltd
+# SPDX-License-Identifier: Apache-2.0
+
+"""Dell PowerVault backend for Sunbeam storage."""

sunbeam-python/sunbeam/storage/backends/dellpowervault/backend.py

@@ -0,0 +1,97 @@
+# SPDX-FileCopyrightText: 2026 - Canonical Ltd
+# SPDX-License-Identifier: Apache-2.0
+
+"""Dell PowerVault backend implementation using base step classes."""
+
+import logging
+from enum import StrEnum
+from typing import Annotated
+
+from pydantic import Field
+from rich.console import Console
+
+from sunbeam.core.manifest import StorageBackendConfig
+from sunbeam.storage.base import StorageBackendBase
+
+LOG = logging.getLogger(__name__)
+console = Console()
+
+
+class Protocol(StrEnum):
+    """Enumeration of valid protocol types."""
+
+    FC = "fc"
+    ISCSI = "iscsi"
+
+
+class DellPowerVaultConfig(StorageBackendConfig):
+    """Configuration model for Dell PowerVault backend.
+
+    This model includes ALL configuration options for the backend.
+    Additional configuration can be managed dynamically through the charm.
+    """
+
+    # Mandatory connection parameters
+    san_ip: Annotated[
+        str, Field(description="Storage array management IP address or hostname")
+    ]
+
+    protocol: Annotated[
+        Protocol,
+        Field(description="Protocol selector: fc, iscsi."),
+    ]
+
+    # Optional backend configuration
+    driver_ssl_cert: Annotated[
+        str | None,
+        Field(
+            description="PEM-encoded SSL certificate for HTTPS connections to the storage array."  # noqa: E501
+        ),
+    ] = None
+
+    pvme_pool_name: Annotated[
+        str | None,
+        Field(description="Pool or Vdisk name to use for volume creation."),
+    ] = None
+
+    pvme_iscsi_ips: Annotated[
+        str | None,
+        Field(description="List of comma-separated target iSCSI IP addresses."),
+    ] = None
+
+
+class DellPowerVaultBackend(StorageBackendBase):
+    """Dell PowerVault backend implementation."""
+
+    backend_type = "dellpowervault"
+    display_name = "Dell PowerVault"
+    generally_available = False
+
+    @property
+    def charm_name(self) -> str:
+        """Return the charm application name."""
+        return "cinder-volume-dellpowervault"
+
+    @property
+    def charm_channel(self) -> str:
+        """Return the default charm channel."""
+        return "latest/edge"
+
+    @property
+    def charm_revision(self) -> str | None:
+        """Return a pinned charm revision, if any."""
+        return None
+
+    @property
+    def charm_base(self) -> str:
+        """Return the target base for this charm."""
+        return "ubuntu@24.04"
+
+    @property
+    def supports_ha(self) -> bool:
+        """Whether this backend supports HA deployments."""
+        return False
+
+    def config_type(self) -> type[StorageBackendConfig]:
+        """Return the configuration model type for this backend."""
+        return DellPowerVaultConfig

sunbeam-python/tests/unit/sunbeam/storage/backends/conftest.py

@@ -6,6 +6,7 @@
 import pytest
 
 from sunbeam.storage.backends.dellpowerstore.backend import DellPowerstoreBackend
+from sunbeam.storage.backends.dellpowervault.backend import DellPowerVaultBackend
 from sunbeam.storage.backends.dellsc.backend import DellSCBackend
 from sunbeam.storage.backends.hitachi.backend import HitachiBackend
 from sunbeam.storage.backends.purestorage.backend import PureStorageBackend
@@ -29,19 +30,28 @@ def dellsc_backend():
     return DellSCBackend()
 
 
+@pytest.fixture
+def dellpowervault_backend():
+    """Provide a Dell PowerVault backend instance."""
+    return DellPowerVaultBackend()
+
+
 @pytest.fixture
 def dellpowerstore_backend():
     """Provide a Dell PowerStore backend instance."""
     return DellPowerstoreBackend()
 
 
-@pytest.fixture(params=["hitachi", "purestorage", "dellsc", "dellpowerstore"])
+@pytest.fixture(
+    params=["hitachi", "purestorage", "dellsc", "dellpowervault", "dellpowerstore"]
+)
 def any_backend(request):
     """Parametrized fixture that provides each backend type."""
     backends = {
         "hitachi": HitachiBackend(),
         "purestorage": PureStorageBackend(),
         "dellsc": DellSCBackend(),
+        "dellpowervault": DellPowerVaultBackend(),
         "dellpowerstore": DellPowerstoreBackend(),
     }
     return backends[request.param]

sunbeam-python/tests/unit/sunbeam/storage/backends/test_common.py

@@ -157,13 +157,18 @@ def backend(self, any_backend):
 
 
 def test_all_backends_have_unique_types(
-    hitachi_backend, purestorage_backend, dellsc_backend, dellpowerstore_backend
+    hitachi_backend,
+    purestorage_backend,
+    dellsc_backend,
+    dellpowervault_backend,
+    dellpowerstore_backend,
 ):
     """Test that all backends have unique type identifiers."""
     backends = [
         hitachi_backend,
         purestorage_backend,
         dellsc_backend,
+        dellpowervault_backend,
         dellpowerstore_backend,
     ]
     types = [b.backend_type for b in backends]
@@ -173,13 +178,18 @@ def test_all_backends_have_unique_types(
 
 
 def test_all_backends_have_unique_charm_names(
-    hitachi_backend, purestorage_backend, dellsc_backend, dellpowerstore_backend
+    hitachi_backend,
+    purestorage_backend,
+    dellsc_backend,
+    dellpowervault_backend,
+    dellpowerstore_backend,
 ):
     """Test that all backends have unique charm names."""
     backends = [
         hitachi_backend,
         purestorage_backend,
         dellsc_backend,
+        dellpowervault_backend,
         dellpowerstore_backend,
     ]
     charm_names = [b.charm_name for b in backends]
@@ -196,6 +206,7 @@ def test_all_backends_have_unique_charm_names(
         ("hitachi", "hitachi"),
         ("purestorage", "purestorage"),
         ("dellsc", "dellsc"),
+        ("dellpowervault", "dellpowervault"),
         ("dellpowerstore", "dellpowerstore"),
     ],
 )
@@ -211,6 +222,7 @@ def test_backend_types_match_expected(any_backend, backend_type, expected_type):
         ("hitachi", "cinder-volume-hitachi"),
         ("purestorage", "cinder-volume-purestorage"),
         ("dellsc", "cinder-volume-dellsc"),
+        ("dellpowervault", "cinder-volume-dellpowervault"),
         ("dellpowerstore", "cinder-volume-dellpowerstore"),
     ],
 )

sunbeam-python/tests/unit/sunbeam/storage/backends/test_dellpowervault.py

@@ -0,0 +1,37 @@
+# SPDX-FileCopyrightText: 2026 - Canonical Ltd
+# SPDX-License-Identifier: Apache-2.0
+
+"""Tests for Dell PowerVault backend."""
+
+import pytest
+
+from sunbeam.storage.backends.dellpowervault.backend import Protocol
+from tests.unit.sunbeam.storage.backends.test_common import BaseBackendTests
+
+
+class TestDellPowerVaultBackend(BaseBackendTests):
+    """Tests for Dell PowerVault backend."""
+
+    @pytest.fixture
+    def backend(self, dellpowervault_backend):
+        """Provide Dell PowerVault backend instance."""
+        return dellpowervault_backend
+
+    def test_backend_type_is_dellpowervault(self, backend):
+        """Test that backend type is 'dellpowervault'."""
+        assert backend.backend_type == "dellpowervault"
+
+    def test_display_name_mentions_powervault(self, backend):
+        """Test that display name mentions PowerVault."""
+        assert "powervault" in backend.display_name.lower()
+
+    def test_charm_name_is_dellpowervault_charm(self, backend):
+        """Test that charm name is cinder-volume-dellpowervault."""
+        assert backend.charm_name == "cinder-volume-dellpowervault"
+
+    def test_dellpowervault_protocol_uses_enum(self, backend):
+        """Test protocol field is typed using the Protocol enum."""
+        config_class = backend.config_type()
+        protocol_field = config_class.model_fields.get("protocol")
+        assert protocol_field is not None
+        assert protocol_field.annotation is Protocol