在我的案例中，手动创建一个DB集群解决了这个问题。

由于某种原因，当我安装postgres时，没有创建“初始DB”。执行initdb对我来说很管用。

这个解决方案在PostgreSQL Wiki -第一步:

initdb 通常情况下，在操作系统中安装postgres会创建一个“初始DB”，并启动postgres服务器守护进程。如果没有，则需要运行initdb

这对我来说很管用:

psql -h localhost -U postgres

psql postgres

postgres=# CREATE ROLE username superuser;
postgres=# ALTER ROLE username WITH LOGIN;

对我来说，像将端口从5432更改为5433这样简单的操作就可以了。

遵循以下步骤，它将为你工作:

run msfconsole type db_console some information will be shown to you chose the information who tell you to make: db_connect user:pass@host:port.../database sorry I don't remember it but it's like this one then replace the user and the password and the host and the database with the information included in the database.yml in the emplacement: /usr/share/metasploit-framework/config you will see. rebuilding the model cache in the background. Type apt-get update && apt-get upgrade after the update restart the terminal and lunch msfconsole and it works you can check that by typing in msfconsole: msf>db_status you will see that it's connected.

Windows用户:psql -U postgres

然后你应该看到PostgreSQL的命令行界面:postgres=#