这篇文章主要介绍“PostgreSQL中在忘记密码或无权限登录数据库时怎么recover administrator”,在日常操作中,相信很多人在PostgreSQL中在忘记密码或无权限登录数据库时怎么recover administrator问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”PostgreSQL中在忘记密码或无权限登录数据库时怎么recover administrator”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
创建数据库,把管理员设置为NOLOGIN
[pg12@localhost ~]$ initdb -D /data/pg12/tmpdb The files belonging to this database system will be owned by user "pg12". This user must also own the server process. The database cluster will be initialized with locale "en_US.UTF-8". The default database encoding has accordingly been set to "UTF8". The default text search configuration will be set to "english". Data page checksums are disabled. creating directory /data/pg12/tmpdb ... ok creating subdirectories ... ok selecting dynamic shared memory implementation ... posix selecting default max_connections ... 100 selecting default shared_buffers ... 128MB selecting default timezone ... PRC creating configuration files ... ok running bootstrap script ... ok performing post-bootstrap initialization ... ok syncing data to disk ... ok initdb: warning: enabling "trust" authentication for local connections You can change this by editing pg_hba.conf or using the option -A, or --auth-local and --auth-host, the next time you run initdb. Success. You can now start the database server using: pg_ctl -D /data/pg12/tmpdb -l logfile start [pg12@localhost ~]$ pg_ctl -D /data/pg12/tmpdb -l logfile start waiting for server to start.... done server started [pg12@localhost ~]$ psql -U pg12 -c "ALTER ROLE pg12 WITH NOLOGIN" -d postgres ALTER ROLE
尝试登录数据库,提示无法登录
[pg12@localhost ~]$ psql -d postgres psql: error: could not connect to server: FATAL: role "pg12" is not permitted to log in
可通过single user mode处理此类”事故”
关闭数据库
[pg12@localhost ~]$ pg_ctl -D /data/pg12/tmpdb -l logfile stop waiting for server to shut down.... done server stopped
以single user mode模式启动数据库
[pg12@localhost ~]$ postgres --single -D /data/pg12/tmpdb postgres PostgreSQL stand-alone backend 12beta1 backend>
执行维护任务
backend> alter role pg12 with login backend>
启动数据库,登录
[pg12@localhost ~]$ pg_ctl -D /data/pg12/tmpdb -l logfile start waiting for server to start.... done server started [pg12@localhost ~]$ psql -U pg12 -d postgres psql (12beta1) Type "help" for help. postgres=#
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