Assumptions

  • You have my-http-server deployed with an alias setup from the previous story

Recorded values from previous stories

BOSH_DNS_IP=<value>
NON_BOSH_DNS_IP=<value>
HTTP_SERVER_ALIAS=<value>

What

So how does Bosh DNS work? How does it figure out what IP to send traffic to?

How

📝 Find your alias in the Bosh DNS records table

  1. Bosh ssh onto any VM in your CF deployment.
  2. Look at the Bosh DNS records table. (You might need to install jq) 
    cat /var/vcap/instance/dns/records.json | jq .
  3. Find the data about HTTP_SERVER_ALIAS.

❓ Questions

  • What data is present?
  • If you delete this file does Bosh DNS still work on this machine?
  • What is updating this file? (hint: read the Bosh DNS Docs)

Resource