The url had a double // which gave me following error:
==> 1404: Notice: /Stage[main]/Couchbase::Install/Notify[check the community: couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb]/message: defined 'message' as 'check the community: couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb'
==> 1404: Notice: check the pkgsource: http://packages.couchbase.com/releases//3.0.1/couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb
==> 1404: Notice: /Stage[main]/Couchbase::Install/Notify[check the pkgsource: http://packages.couchbase.com/releases//3.0.1/couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb]/message: defined 'message' as 'check the pkgsource: http://packages.couchbase.com/releases//3.0.1/couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb'
==> 1404: Error: Execution of '/usr/bin/dpkg --force-confold -i /opt/couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb' returned 1: dpkg-deb: error: `/opt/couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb' is not a debian format archive
==> 1404: dpkg: error processing archive /opt/couchbase-server-community_3.0.1-ubuntu12.04_amd64.deb (--install):
==> 1404: subprocess dpkg-deb --control returned error exit status 2
The url had a double // which gave me following error: