Replace .p12 certificate

• 1) openssl genrsa -aes256 -out ./my_new_key.pem 2048
• 2) openssl req -new -key my_new_key.pem -out my_new_csr.csr

Related

• .p12
• .cer

See also

• Certificate, CSR (PKCS10), /etc/letsencrypt/csr/, openssl req, X.509, [.pem, .cer, .csr], Kubernetes CertificateSigningRequest