You need Confluence and JIRA. Summary of steps:
Configure Confluence to trust JIRA via Application Links. See
Linking to Another Application
. Follow the prompts to choose either OAuth or Trusted Applications, depending on your setup.
In JIRA, subscribe to all your Confluence gadgets. See the
JIRA administrator's guide
. Alternatively, you can add just this one gadget to the JIRA gadget directory. See the
JIRA administrator's guide
.
Add the gadget to your JIRA dashboard. See the
JIRA user's guide
.