For context I have an application, and it depends on the mysql chart. I've set up the mysql stable chart as a dependent chart in myapp chart.

I have a very large set of sql files, and due to their size, I need to pack them into a specialized seed container. Using the standard helm chart, I can pass in a seed container to init my database as shown in the below values.yaml snippet.

Are there any strategies to get subchart values created at runtime into my values.yaml?

mysql:
  extraInitContainers: |
    - name: init-seed
      image: foobar/seed:0.1.0
      env: 
      - name: MYSQL_HOSTNAME
        value: foobar-mysql
      - name: MYSQL_USER
        value: foo
      - name: MYSQL_PASS
        value: bar

I've tried ways to do the below, but to no avail.

a. Templatize and pass a service name into the MYSQL_HOSTNAME env var

b. Pass the {{ include "mangos_zero.fullname" . }} helper into this value

c. Find the name of the other container within the mysql pod at runtime?

How can I get the service name of the mysql-chart or it's container name passed into my init pod?