These files are generated with the following command:

mkdir -p {str(tmp_path)}/tls
openssl genrsa -out {str(tmp_path)}/tls/ca.key 4096
openssl req \
    -x509 -new -nodes -sha256 \
    -key {str(tmp_path)}/tls/ca.key \
    -days 3650 \
    -subj '/O=Redis Test/CN=Certificate Authority' \
    -out {str(tmp_path)}/tls/ca.crt
openssl genrsa -out {str(tmp_path)}/tls/redis.key 2048
openssl req \
    -new -sha256 \
    -key {str(tmp_path)}/tls/redis.key \
    -subj '/O=Redis Test/CN=Server' | \
    openssl x509 \
        -req -sha256 \
        -CA {str(tmp_path)}/tls/ca.crt \
        -CAkey {str(tmp_path)}/tls/ca.key \
        -CAserial {str(tmp_path)}/tls/ca.txt \
        -CAcreateserial \
        -days 3650 \
        -out {str(tmp_path)}/tls/redis.crt
openssl dhparam -out {str(tmp_path)}/tls/redis.dh 2048


See https://github.com/ray-project/ray/pull/40378/ for more details