feat(uptime): add initial table migration

snuba/snuba_migrations/events_analytics_platform/0020_uptime_monitors_init.py

@@ -0,0 +1,76 @@
+from typing import List, Sequence
+
+from snuba.clickhouse.columns import UUID, Column, String, UInt
+from snuba.clusters.storage_sets import StorageSetKey
+from snuba.migrations import migration, operations, table_engines
+from snuba.migrations.columns import MigrationModifiers as Modifiers
+from snuba.migrations.operations import OperationTarget, SqlOperation
+from snuba.utils.schemas import DateTime64
+
+storage_set = StorageSetKey.EVENTS_ANALYTICS_PLATFORM
+table_prefix = "uptime_monitor_checks"
+local_table_name = f"{table_prefix}_local"
+dist_table_name = f"{table_prefix}_dist"
+
+## what about all the fancy codecs? do we need those?
+columns: List[Column[Modifiers]] = [
+    Column("organization_id", UInt(64)),
+    Column("project_id", UInt(64)),
+    Column("environment", String(Modifiers(nullable=True, low_cardinality=True))),
+    Column("uptime_subscription_id", UUID()),
+    Column("uptime_check_id", UUID()),
+    Column("scheduled_check_time", DateTime64(3)),  # millisecond precision
+    Column("timestamp", DateTime64(3)),  # millisecond precision
+    Column("duration_ms", UInt(64)),
+    Column("region_slug", String(Modifiers(low_cardinality=True))),
+    Column("check_status", String(Modifiers(low_cardinality=True))),
+    Column("check_status_reason", String(Modifiers(low_cardinality=True))),
+    Column("http_status_code", UInt(16)),
+    Column("trace_id", UUID()),
+    Column("retention_days", UInt(16)),
+]
+
+
+class Migration(migration.ClickhouseNodeMigration):
+    blocking = False
+
+    def forwards_ops(self) -> Sequence[SqlOperation]:
+        return [
+            operations.CreateTable(
+                storage_set=storage_set,
+                table_name=local_table_name,
+                columns=columns,
+                engine=table_engines.ReplacingMergeTree(
+                    order_by="(organization_id, project_id, toDateTime(timestamp), trace_id, uptime_check_id)",
+                    partition_by="(retention_days, toMonday(timestamp))",
+                    settings={"index_granularity": "8192"},
+                    storage_set=storage_set,
+                    ttl="toDateTime(timestamp) + toIntervalDay(retention_days)",
+                ),
+                target=OperationTarget.LOCAL,
+            ),
+            operations.CreateTable(
+                storage_set=storage_set,
+                table_name=dist_table_name,
+                columns=columns,
+                engine=table_engines.Distributed(
+                    local_table_name=local_table_name,
+                    sharding_key="cityHash64(reinterpretAsUInt128(trace_id))",
+                ),
+                target=OperationTarget.DISTRIBUTED,
+            ),
+        ]
+
+    def backwards_ops(self) -> Sequence[SqlOperation]:
+        return [
+            operations.DropTable(
+                storage_set=storage_set,
+                table_name=dist_table_name,
+                target=OperationTarget.DISTRIBUTED,
+            ),
+            operations.DropTable(
+                storage_set=storage_set,
+                table_name=local_table_name,
+                target=OperationTarget.LOCAL,
+            ),
+        ]