cURL error 60: SSL: no alternative certificate subject name matches target host name. Inter-project communication - drupal-7

Question

So I'm still in the process of updating a Drupal 7 site to 8 using drush and ddev.
After running the import, I get an error with upgrade_d7_file.
I've tried to install a certificate using this article:
https://www.ddev.com/ddev-local/ddev-local-trusted-https-certificates/
However still get the error, any ideas?
ddev exec drush migrate-import --all
ddev exec drush mmsg upgrade_d7_file
cURL error 60: SSL: no alternative certificate subject name matches target host name
'drupal7migration2.ddev.site'
(see https://curl.haxx.se/libcurl/c/libcurl-errors.html)
(https://drupal7migration2.ddev.site//sites/default/files/Virtual%20Challenges%20%28Results%20and%2
0PBs%29%2020200709.xlsx)

Answer 1

When you want one DDEV-Local project to talk to another using https, curl on the client side has to trust the server side that you're talking to. There are two ways to do this:
(built-in, no changes needed): Use ddev-<projectname>-web (the container name) as the target hostname in the URL. For example in your case, use curl https://ddev-drupal7migration2-web. This hostname is already trusted among various ddev projects.
(requires docker-compose.*.yaml): If you want to use the real full FQDN of the target project (https://drupal7migration2.ddev.site in your case) then you'll need to add that as an external_link in the client project's .ddev. So add a file named .ddev/docker-compose.external_links.yaml in the client side (migration1?) project, with these contents:
version: '3.6'
services:
web:
external_links:
- "ddev-router:drupal7migration2.ddev.site"
That will tell Docker to route requests to "drupal7migration2.ddev.site" to the ddev-router, and your container and curl trust it (it has that name in its cert list).