MQTT connect to SLL broker

i running HA on linux in a docker
the host has the CA.crt installed (sudo update-ca-certificates)

i can connect to mosquito with MQTT Explorer and enabled ssl and certification check
my tasmota device can send to mosquito over ssl

if i try to connect with HA mqtt i get this
[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain

mqtt:
  broker: scraper.local
  port: 12345
  username: 123
  password: 123
  #certificate: /etc/ssl/certs/ca-certificates.crt
  certificate: auto #neither this nor the above works
  tls_insecure: true #doesnt seems to do anything

tried a 1000 different settings nothing works

any ideas?

certidicate is what you need. It’s the certificate of the CA used to sign the MQTT certificate.
Now, it’s definitely not in “/etc” on the docker container. Put it under /config somewhere.