Kubernetes set-up for development

The current Kubernetes scripts are not ideal for development purposes - the following three improvements could be made:

• The script line in kubectl-startup to create a password does not work on MacOS (tr does not like the data it gets from urandom)
• Kubernetes configuration was pulling in the latest apache/fineract image rather than using the one built by our docker-compose build
• The MySQL password passed in during the initial run of Kubernetes seems to be getting stored on the PersistentVolume /mnt/data. Since we generate a new password every time we run kubectl-startup whereas the data on the volume is retained, at least for me this meant only the first startup worked. After that all the startups failed, as Fineract is not able to login to MySQL

These can be fixed with:

• kubectl create secret generic fineract-tenants-db-secret --from-literal=username=root --from-literal=password=$(head /dev/urandom | env LC_C TYPE=C tr -dc A-Za-z0-9 | head -c 16) to get the password generation to work on MacOS
• Changing the image label to be the same across docker-compose.yml and fineract-server-deployment.yml
• Added  persistentVolumeReclaimPolicy: Recycle to the PersistentVolume spec in fineractmysql-deployment.yml. This way the volume gets wiped after each shutdown, allowing the new password to be used for MySQL. Of course also the data gets wiped, so a better option would probably be to keep the generated secret and reuse it from one startup to next.