If you're all set up with Vitess but mysqld won't start, with an error like this:

E0430 17:02:43.663441    5297 mysqlctl.go:254] failed start mysql: mysqld not found in any of /usr/bin/{sbin,bin,libexec}

You will need to perform the following steps:

• Verify that mysqld is located in /usr/bin on all its hosts
• Verify that PATH has been set and sourced in .bashrc

If you have confirmed the above and are still getting the error referenced, it is likely that VT_MYSQL_ROOT has not been set correctly.

On most systems VT_MYSQL_ROOT should be set to /usr because Vitess expects to find a bin directory below that.