product · inferred from evidence
x509
A certificate standard referenced in the error context.
- TeamCity agent docker-in-docker: x509 certificate signed by unknown authority on private registry
The certificate volume was not actually mounted inside the agent container, so Docker inside the agent never saw the CA. Create the CA certificate directly in the container at /etc/docker/certs.d/[mydomain.com]/ca.crt (per the teamcity-mini