/usr/share/tripleo-image-elements/mysql/source-repository-mysql is in python-tripleo-image-elements 0.7.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | xtradb-cluster tar /usr/local/Percona-XtraDB-Cluster http://www.percona.com/redir/downloads/Percona-XtraDB-Cluster/LATEST/binary/linux/$PERCONA_ARCH/Percona-XtraDB-Cluster-5.5.34-25.9.607.Linux.$PERCONA_ARCH.tar.gz
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