Overview:
This process intends to delete volumes in a docker based environment
The process can be done in two ways: Using Terminal or using Portainer
Delete Volume Using Terminal and command:
In this method we will use terminal to delete the volumes if Portainer/UI based software is not installed
Go to the directory containing docker volumes, if using default settings go to
cd /var/lib/docker/volumes
BASH
List of all the volumes will be shown in the directory, choose the appropriate volume to delete and execute
docker volume rm < volume >
BASH
After executing the command, if you receive the volume name, then the volume is successfully deleted
Here is an example to show how things will work

Delete Volume Using Portainer UI:
In this method we are using Portainer to delete the volumes, Portainer is present in all our docker based environment
Login to portainer.io by accessing <ip:portainer port number> for example https://10.2.9.132:9000 from the browser
Go to left Menu options→ volumes
select all the volumes except portainer_data → click Remove to remove all the volumes

Note
- Make sure you always do docker-compose down before deleting any volumes
- Only delete volumes related to the stack you are working on
- Do not delete Portainer_data volume, or you will have to re apply all the configurations for Portainer