entrypoint fails on chown if there are readonly hidden files in the datadir

[jeffbearer]

If there are readonly elements in the datadir like a .snapshot directory from a storage server the entrypoint fails on the chown of the datadir since the script is running the the -e shell option.

It can be worked around with adding a || true to that line. or a more elegant solution may be desired.

chown -R mysql:mysql "$DATADIR" || true

[wglambert]

mysql:5.7 and lower has an option for ignoring directories https://dev.mysql.com/doc/refman/5.7/en/server-options.html#option_mysqld_ignore-db-dir

Similar to the lost+found issue #186

[yosifkit]

With a .snapshot directory, it seems that you don't hit the #186 problem since it is a "hidden" folder.

You could just skip the chown by setting a --user (compose: user:) to the (non-root) owner of the directory on the storage server.

Or you could use a subdirectory of your storage device so that .snapshot is next to the target of /var/lib/mysql rather than inside it.