When adding a new cluster the following command must be used:
flynn cluster add -p <tls pin> <cluster name> <controller domain> <controller key>
Where do you obtain the <tls pin>?
You can generate the TLS Pin with the following command:
openssl s_client -connect controller.$CLUSTER_DOMAIN:443 \
-servername controller.$CLUSTER_DOMAIN 2>/dev/null </dev/null \
| sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' \
| openssl x509 -inform PEM -outform DER \
| openssl dgst -binary -sha256 \
| openssl base64
(be sure to set CLUSTER_DOMAIN first, e.g. CLUSTER_DOMAIN=xxxx.flynnhub.com)