Merge pull request juju#16654 from wallyworld/block-device-schema

juju#16654

Add DDL to create model tables for block devices.

The tables created are:
- block_device
- block_device_link_device (block devices have 0 or more link devices)
- block_device_machine (join table for pairing block device with its machine)

## QA steps

N/A

## Links

**Jira card:** JUJU-5038

domain/schema/model.go

@@ -26,6 +26,7 @@ func ModelDDL() *schema.Schema {
 		unitSchema,
 		spaceSchema,
 		subnetSchema,
+		blockDeviceSchema,
 	}
 
 	schema := schema.New()
@@ -325,3 +326,70 @@ CREATE UNIQUE INDEX idx_unit_net_node
 ON unit (net_node_uuid);
 `)
 }
+
+func blockDeviceSchema() schema.Patch {
+	return schema.MakePatch(`
+CREATE TABLE block_device (
+    uuid               TEXT PRIMARY KEY,
+    name               TEXT NOT NULL,
+    label              TEXT,
+    device_uuid        TEXT,
+    hardware_id        TEXT,
+    wwn                TEXT,
+    bus_address        TEXT,
+    serial_id          TEXT,
+    filesystem_type_id INT,
+    size               INT,
+    mount_point        TEXT,
+    in_use             BOOLEAN,
+    CONSTRAINT         fk_filesystem_type
+        FOREIGN KEY    (filesystem_type_id)
+        REFERENCES     filesystem_type(id)
+);
+
+CREATE UNIQUE INDEX idx_block_device_name
+ON block_device (name);
+
+CREATE TABLE filesystem_type (
+    id   INT PRIMARY KEY,
+    name TEXT NOT NULL
+);
+
+CREATE UNIQUE INDEX idx_filesystem_type_name
+ON filesystem_type (name);
+
+INSERT INTO filesystem_type VALUES
+    (0, 'ext4'),
+    (1, 'xfs'),
+    (2, 'btrfs'),
+    (3, 'zfs');
+
+CREATE TABLE block_device_link_device (
+    block_device_uuid TEXT NOT NULL,
+    name              TEXT NOT NULL,
+    CONSTRAINT        fk_block_device_link_device
+        FOREIGN KEY   (block_device_uuid)
+        REFERENCES    block_device(uuid)
+);
+
+CREATE UNIQUE INDEX idx_block_device_link_device
+ON block_device_link_device (block_device_uuid, name);
+
+CREATE INDEX idx_block_device_link_device_device
+ON block_device_link_device (block_device_uuid);
+
+CREATE TABLE block_device_machine (
+    block_device_uuid TEXT PRIMARY KEY,
+    machine_uuid    TEXT NOT NULL,
+    CONSTRAINT      fk_block_device_machine_device
+        FOREIGN KEY (block_device_uuid)
+        REFERENCES  block_device(uuid),
+    CONSTRAINT      fk_block_device_machine
+        FOREIGN KEY (machine_uuid)
+        REFERENCES  machine(uuid)
+);
+
+CREATE INDEX idx_block_device_machine
+ON block_device_machine (machine_uuid);
+`)
+}

domain/schema/schema_test.go

@@ -150,6 +150,12 @@ func (s *schemaSuite) TestModelDDLApply(c *gc.C) {
 		"provider_network_subnet",
 		"availability_zone",
 		"availability_zone_subnet",
+
+		// Block device
+		"block_device",
+		"filesystem_type",
+		"block_device_link_device",
+		"block_device_machine",
 	)
 	c.Assert(readTableNames(c, s.DB()), jc.SameContents, expected.Union(internalTableNames).SortedValues())
 }