Hi, 

First do what @FaisalAnsari says:

Go to RDS and create a database in PostgreSQL and configure the server.conf file as the given below

[options]
;This is the password that allows database operations:
;admin_passwd = admin
db_host = rds_endpoint (after creating database you will get rds_endpoint)
db_port = False
db_user = "user name which is created by you to the database"
db_password = "password which is created"
;addons_path = /home/deadpool/workspace/odoo_13_community/custom_addons, /home/deadpool/workspace/odoo_13_community/custom_addons

Then go to the command line and do the following:

1. stop your odoo instance

    ~$ service odoo stop

2. Enable command line for the user odoo

   ~$ chsh -s /bin/bash odoo

3. execute odoo from command line as user odoo

    ~$ runuser -l odoo -c "odoo -i base -d YourRDSDatabase --db_host YourAmazonRDSHost.Address.rds.amazonaws.com -r YourRDSDatabaseUserName -w YourRDSDatabasePassword --stop-after-init"

4. After the initialization finished, start odoo service

    ~$ service odoo start

Troubleshooting:

if odoo doesn't start correctly make sure that the database user in your RDS instance have privileges at least on the database you are using. 

    ~$ psql --host=YourAmazonRDSHost.Address.rds.amazonaws.com --port=5432 --username=YourRDSDatabaseUserName --password --dbname=YourRDSDatabase

and when you are inside postgresql type the following: 

    ~$ grant all privileges on database YourRDSDatabase to YourRDSDatabaseUserName;

    ~$ \q

and try again from step 3.

Hope this help!

Hi,

Which instance type have you chosen for DB? Was it Was it db.t3.micro?

Go to RDS and create a database in PostgreSQL and configure the server.conf file as the given below

[options] 
;This is the password that allows database operations:
;admin_passwd = admin
db_host = rds_endpoint (after creating database you will get rds_endpoint)
db_port = False 
db_user = "user name which is created by you to the database"
db_password = "password which is created"
;addons_path = /home/deadpool/workspace/odoo_13_community/custom_addons, /home/deadpool/workspace/odoo_13_community/custom_addons