Add schema validation to DB

This ensures we don't open a DB with an earlier schema or a
config that differs from ours

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

Closes: #86
Approved by: rhatdan

1 files changed, 9 insertions, 0 deletions

diff --git a/libpod/sql_state.go b/libpod/sql_state.go
index 8b18a8959..7c2061fca 100644
--- a/libpod/sql_state.go
+++ b/libpod/sql_state.go
@@ -14,6 +14,10 @@ import (
 	_ "github.com/mattn/go-sqlite3"
 )
 
+// DBSchema is the current DB schema version
+// Increments every time a change is made to the database's tables
+const DBSchema = 1
+
 // SQLState is a state implementation backed by a persistent SQLite3 database
 type SQLState struct {
 	db       *sql.DB
@@ -69,6 +73,11 @@ func NewSQLState(dbPath, lockPath, specsDir string, runtime *Runtime) (State, er
 		return nil, err
 	}
 
+	// Ensure that the database matches our config
+	if err := checkDB(db, runtime); err != nil {
+		return nil, err
+	}
+
 	state.db = db
 
 	state.valid = true