Fix missing migrations

src/dstack/_internal/server/migrations/versions/9eea6af28e10_added_fail_reason_for_instancemodel.py

@@ -0,0 +1,35 @@
+"""Added fail reason for InstanceModel
+
+Revision ID: 9eea6af28e10
+Revises: 29c08c6a8cb3
+Create Date: 2024-02-19 11:39:30.572999
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "9eea6af28e10"
+down_revision = "29c08c6a8cb3"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("instances", schema=None) as batch_op:
+        batch_op.add_column(
+            sa.Column("fail_count", sa.Integer(), server_default=sa.text("0"), nullable=False)
+        )
+        batch_op.add_column(sa.Column("fail_reason", sa.String(length=4000), nullable=True))
+
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table("instances", schema=None) as batch_op:
+        batch_op.drop_column("fail_reason")
+        batch_op.drop_column("fail_count")
+
+    # ### end Alembic commands ###

src/dstack/_internal/server/models.py

@@ -14,6 +14,7 @@
     String,
     Text,
     UniqueConstraint,
+    text,
 )
 from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
 from sqlalchemy.sql import false
@@ -292,7 +293,7 @@ class InstanceModel(BaseModel):
     )
 
     # connection fail handling
-    fail_count: Mapped[int] = mapped_column(Integer, default=0)
+    fail_count: Mapped[int] = mapped_column(Integer, server_default=text("0"))
     fail_reason: Mapped[Optional[str]] = mapped_column(String(4000))
 
     # backend