Problems with the setup_sensu-docker.sh script

[ghost]

I hit some problems running the setup_sensu-docker.sh script - specifically in the "generate_ssl" function.

I had to make some directories in order for the script to run successfully.

Added this 4 lines after the "cd cd /usr/local/etc/sensu-docker" statement:

rm -rf sensu_ca mkdir sensu_ca mkdir -p sensu_ca/private mkdir -p sensu_ca/certs