我正在尝试将一个名为Thingsboard的应用程序与一个都在Google Cloud Engine上运行的postgresql DB连接。 将数据库设置为仅允许SSL连接时，我有GCE提供的以下文件：
client-cert.pem client-key.pem server-ca.pem
这是建立与数据库的连接的地方。我尝试使用client-key.pem作为client-key.pem，client-key.key，client-key.pk8（带有和不带有密码短语，当添加密码短语时，我添加了字段“ sslpassword = MYKEY”
url: "${SPRING_DATASOURCE_URL:jdbc:postgresql://DATABASEIP:5432/thingsboard?sslmode=verify-ca&sslrootcert=/etc/thingsboard/conf/keystore/server-ca.pem&sslcert=/etc/thingsboard/conf/keystore/client-cert.pem&sslkey=/etc/thingsboard/conf/keystore/client-key.pk8}"
username: "${SPRING_DATASOURCE_USERNAME:MYDBUSERNAME}"
password: "${SPRING_DATASOURCE_PASSWORD:MYDBPASSWORD}"
我遇到以下错误
2019-01-16 18:55:32,866 [localhost-startStop-1] ERROR o.a.tomcat.jdbc.pool.ConnectionPool - Unable to create initial connections of pool.
org.postgresql.util.PSQLException: Could not read SSL key file /etc/thingsboard/conf/keystore/client-key.pk8.