PostgreSQL - fatal error : Ident authentication failed for user

Question

我在数据库 mytestdb 中创建了一个名为 employees 的简单表

我想将这个表导入到 hdfs 中。

bin/sqoop import --connect 'jdbc:postgresql://127.0.0.1/mytestdb' --username user -P --table employees --target-dir /user/postgres

但是，我一直收到错误消息:

WARNING: SQLException occurred while connecting to 127.0.0.1:5432 org.postgresql.util.PSQLException: FATAL: Ident authentication failed for user "user" at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:473)

/var/lib/pgsql/data/pg_hba.conf设置如下:

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     md5
# IPv4 local connections:
host    all             all             127.0.0.1/32            ident
# IPv6 local connections:
host    all             all             ::1/128                 ident
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local   replication     postgres                                peer
#host    replication     postgres        127.0.0.1/32            ident
#host    replication     postgres        ::1/128                 ident

Answer 1

我从网络上的几个不同来源的组合中找到了一个可行的解决方案。

编辑配置文件

nano /var/lib/pgsql/data/pg_hba.configuration

用 md5 替换前两个 ident，如下所示:

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     md5
# IPv4 local connections:
host    all             all             127.0.0.1/32            md5
# IPv6 local connections:
host    all             all             ::1/128                 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local   replication     postgres                                peer
#host    replication     postgres        127.0.0.1/32            ident
#host    replication     postgres        ::1/128                 ident

保存文件。

然后，重启服务器

sudo systemctl restart postgresql

最后，将数据库testdb的所有权限授予hduser；