我在本地主机上有两个本地服务器（配置为nginx代理后面的docker容器），我想在服务器A中使用CURL来使用服务器B的API。它们都使用带有自签名证书的SSL （也已配置）。
curl_setopt($request, CURLOPT_CAINFO, __DIR__ . '/../' . getenv('SERVER_B_CA_CERT'));
curl_setopt($request, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
curl_setopt($request, CURLOPT_SSL_VERIFYPEER, getenv('CURL_SSL_VERIFYPEER'));
curl_setopt($request, CURLOPT_SSL_VERIFYHOST, getenv('CURL_SSL_VERIFYHOST'));
CURLOPT_SSL_VERIFYHOST和CURLOPT_SSL_VERIFYPEER都设置为false。
我从PHP的curl库收到“连接被拒绝”（curl错误代码7）消息。我的容器之间没有防火墙，并且我的nginx代理似乎配置正确。服务器已经启动并正在监听，因为我已经能够使用Web浏览器和curl客户端连接到服务器。
有什么想法吗？
编辑：
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* Trying 127.0.0.1..."
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* TCP_NODELAY set"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* connect to 127.0.0.1 port 443 failed: Connection refused"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* Trying ::1..."
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* TCP_NODELAY set"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* Immediate connect fail for ::1: Cannot assign requested address"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* Trying ::1..."
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* TCP_NODELAY set"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* Immediate connect fail for ::1: Cannot assign requested address"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* Failed to connect to server-b.local.com port 443: Connection refused"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "* Closing connection 0"
php_1 | [05-Mar-2019 22:49:40] WARNING: [pool www] child 66 said into stderr: "NOTICE: PHP message: CURL ERROR = Failed to connect to server-b.local.com port 443: Connection refused, CODE = 7"