问题：执行./create_db_devel.sh -u postgres创建数据库时出错
描述：
[root@localhost dbscripts]# ./create_db_devel.sh -u postgres /home/wqx/tf-git-repo/ovirt-engine-local/backend/manager/dbscripts /home/wqx/tf-git-repo/ovirt-engine-local/backend/manager/dbscripts Running original create_db script... /home/wqx/tf-git-repo/ovirt-engine-local/backend/manager/dbscripts /home/wqx/tf-git-repo/ovirt-engine-local/backend/manager/dbscripts Creating the database: engine dropdb: could not connect to database postgres: could not connect to server: Connection refused Is the server running on host "localhost" and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused Is the server running on host "localhost" and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused Is the server running on host "localhost" and accepting TCP/IP connections on port 5432? createdb: could not connect to database postgres: could not connect to server: Connection refused Is the server running on host "localhost" and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused Is the server running on host "localhost" and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused Is the server running on host "localhost" and accepting TCP/IP connections on port 5432? Failed to create database engine /home/wqx/tf-git-repo/ovirt-engine-local/backend/manager/dbscripts Failed to create database engine /home/wqx/tf-git-repo/ovirt-engine-local/backend/manager/dbscripts
解决方法：重启数据库 service postgresql restart