There is some additional documentation required when installing Maxscale 2.4.2 on CentOS 7

$ yum -y install maxscale-2.4.2-1.centos.7.x86_64

$ maxkeys

$ maxpasswd my-maxscale-plaintext-password

Output from maxpasswd is placed in the /etc/maxscale.cnf file

The problem is that the /var/lib/maxscale/.secrets file is created as owned by the user who ran the commands rather than maxscale.

This leads to the following error when starting MaxScale:

Access for secrets file [/var/lib/maxscale/.secrets] failed. Error 13, Permission denied.

It can be fixed with:

$ chown maxscale: /var/lib/maxscale/.secrets

The yum install creates the maxscale user but does not advise that you change to that user to perform the other actions.