JIRA provides two issue actions for creating and commenting of OTRS tickets:

Create OTRS Ticket

This action creates an OTRS ticket

Requirements to use this action:

In order to create OTRS Tickets a customer and Ticket queue is mandatory. These fields can be mapped to configurable custom fields (CUSTOMFIELD_OTRS_QUEUE and CUSTOMFIELD_OTRS_CUSTOMER). The Create OTRS ticket dialogue will be pre-filled with values friom those fields.
The two fields can be set to read-only via the key 'CREATE_OTRS_TICKET_ACTION_IS_READONLY'
The Key 'CREATE_OTRS_TICKET_ACTION_IS_ACTIVE' controls wheter the action is enabled or not.

OTRS Comment

No configuration necessary

No configurations required to use this action