How to install an Origin CA certificate using Google App Engine

At the present time, Google App Engine only allows the uploading of certificates that are either self-signed or are signed by a publicly trusted certificate authority (CA).

CloudFlare's CA for origin certificates is not publicly trusted, so Google App Engine currently returns an error when an Origin CA certificate is uploaded: "The SSL certificate provided could not be inserted."

We've reached out to Google regarding this policy decision and will update this article if the behavior changes.

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