I recently setup Heroku Wildcard SSL and it took a bit of doing so decided to post this to hopefully make someone’s day a little easier!
Let’s say I have
domain.com and I want to point
*.domain.com to a heroku app. Additionally I use Cloudflare for DNS.
- Manually configure the heroku domain
- Setup the provided CNAME in cloudflare.
- Create a GitHub Action which runs weekly and updates the SSL certificate.
When I first ran this, has some problems b/c there was no existing certificate in Heroku so
certs:update failed, so I manually ran these commands once & created the cert, then came back and tried it again and it worked!
Additionally, using the
--debug 2 flag on the
~/.acme.sh/acme.sh command is really useful to see the full request & response bodies.