PostgreSQL simple way to add a read-only users

1. Add the white list to avoid the read-only data in the development of colleagues the wrong modify the database, but they always want to query the database.

The easiest way is to modify pg_hba.conf add read-only users.

2. Add read-only users.

Log pg database using psql 

psql -U gscloud -d gscloud

Effect:

[root@centos76 zhaobsh]# psql -U gscloud -d gscloud
Password for user gscloud: 
psql (10.7)
Type "help" for help.

gscloud=# 

Add user

create role gscloudreader with password 'Test6530';

Adding usage rights to the user and read-only access

Given usage rights 
grant usage on schema gscloud to gscloudreader; 
given query permissions 
Grant the SELECT ON All the Tables in Schema gscloud to gscloudreader; 
given login privileges 
alter user gscloudreader with login;

4. Modify pg_hba.conf ip address add any user access

# 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
#host    all             all             0.0.0.0/0              md5
host    gscloud         gscloudreader             0.0.0.0/0              md5

5. Restart service verification

systemctl restart postgresql-10

6. Verify able to log tests are normal.

 

 7. Verify can not be deleted and modified.