root@node-controller:/etc/keystone# su -s /bin/sh -c "keystone-manage db_sync" keystone
2016-07-19 02:37:23.521 74327 WARNING oslo_db.sqlalchemy.session [-] SQL connection failed. 10 attempts left.
解決方法:
? ? 出現(xiàn)此問題,一般是和數(shù)據(jù)庫連接不上,檢查和數(shù)據(jù)庫的連接,或者重啟數(shù)據(jù)庫服務(wù)