You need JIRA, FishEye/Crucible and Confluence. Summary of steps:

• Configure the FishEye plugin for JIRA and subscribe JIRA to all FishEye's gadgets. See the JIRA administrator's guide.
• Configure JIRA to trust Confluence. See the JIRA administrator's guide.
• In Confluence, subscribe to all your JIRA gadgets. Alternatively, you can add just this one gadget to Confluence's list of authorised external gadgets. see the Confluence administrator's guide.
• Add the gadget to a wiki page via the macro browser. See the Confluence user's guide.