Trusted system certificates

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As a Cloud Foundry admin, you can deploy a set of trusted system certificates. These trusted certificates are available in Linux-based app instances running on the Diego back end. Such instances include buildpack-based apps using the cflinuxfs[3|4] stack and Docker image-based apps.

If the admin configures these certificates, they are available inside the instance containers as files with extension .crt in the read-only /etc/cf-system-certificates directory.

For cflinuxfs[3|4]-based apps, these certificates are also installed directly in the /etc/ssl/certs directory, and are available to libraries such as openssl that respect that trust store. If the administrator configure these certificates, the location of the certificates is provided in the environment variable CF_SYSTEM_CERT_PATH on the instance container.