我正在尝试设置kafka（0.10.0v）和filebeat（5.6.0v）之间的ssl连接。我已经完成了下面的工作。
通过遵循本文档，我已经在代理之间设置了ssl通信。目前，不需要客户端身份验证。
在filebeat.yml中提供用于签署kafka服务器证书的ca，以便对kafka和filebeat之间的通信进行加密。
但是在启动filebeat服务时，我得到了以下错误。

2018/07/06 17:22:01.128453 log.go:12: WARN Failed to connect to broker xx.xx.xxx:9093: x509: cannot validate certificate for xx.xx.xxx.114 because it doesn't contain any IP SANs
2018/07/06 17:22:01.128488 log.go:16: WARN kafka message: client/metadata got error from broker while fetching metadata:%!(EXTRA x509.HostnameError=x509: cannot validate certificate for xx.xx.xxx.114 because it doesn't contain any IP SANs)
2018/07/06 17:22:01.128507 log.go:12: WARN client/metadata fetching metadata for all topics from broker xx.xx.xxx.115:9093
2018/07/06 17:22:01.142781 log.go:12: WARN Failed to connect to broker xx.xx.xxx.115:9093: x509: cannot validate certificate for xx.xx.xxx.115 because it doesn't contain any IP SANs
2018/07/06 17:22:01.142815 log.go:16: WARN kafka message: client/metadata got error from broker while fetching metadata:%!(EXTRA x509.HostnameError=x509: cannot validate certificate for xx.xx.xxx.115 because it doesn't contain any IP SANs)

在使用ca签名之前检查服务器证书时，我可以看到san（ip）的设置，如下所示

openssl req -noout -text -in cert-file Certificate Request:
    Data:
        Version: 0 (0x0)
        Subject: C=XX, ST=XX, L=XX, O=XXXX, OU=XXX, CN=*
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (2048 bit)
                Modulus:
                    00:9d:e3:94:be:33:d8:52:48:64:f6:db:5a:09:23:
                    22:64:b0:e2:75:14:2b:a2:9c:1e:43:6d:6a:d2:aa:
                    ff:84:46:ba:50:c1:57:4b:5f:2f:06:6b:ff:89:5a:
                    24:73:dd:7b:45:29:3f:74:1b:11:e3:53:93:bf:99:
                    02:8f:dc:95:7c:4e:3c:cb:67:8b:fe:e2:97:2f:0f:
                    45:92:9f:9f:03:76:e8:5b:16:93:8b:6c:b1:78:18:
                    63:e8:ec:1c:84:98:64:13:e4:12:eb:b7:9a:9b:93:
                    02:06:41:c7:d2:21:65:7d:9a:68:e4:8c:ec:19:47:
                    b8:47:a6:6c:04:93:0e:f4:04:b0:d4:1b:c4:9c:92:
                    d5:da:50:17:a6:e8:5a:bd:6c:7e:8b:bb:08:67:48:
                    ef:59:14:4c:8a:c6:4e:e7:ac:c1:eb:d0:60:56:dd:
                    af:54:7d:d9:35:ed:26:cc:ee:e2:8a:5d:18:0e:86:
                    d7:ba:13:b7:bb:e2:54:8f:14:a1:d1:25:ea:1b:e7:
                    ed:38:fb:d9:e6:f4:7d:b7:ef:ea:b1:18:39:35:d1:
                    53:bf:59:b2:2a:33:e5:23:38:16:04:bc:54:da:63:
                    0e:35:de:a2:41:5e:72:e7:4a:ea:24:3b:52:c1:61:
                    b3:82:32:e7:0c:cd:02:fd:11:93:15:79:76:46:b7:
                    17:bb
                Exponent: 65537 (0x10001)
        Attributes:
        Requested Extensions:
            X509v3 Subject Alternative Name:
                IP Address:xx.xx.xxx.115
            X509v3 Subject Key Identifier:
                9A:41:EC:4C:FA:D5:3D:C6:F8:18:A7:24:FB:5C:EA:03:70:C2:FC:71
    Signature Algorithm: sha256WithRSAEncryption
         1d:61:c2:84:21:f7:ac:05:9c:83:2f:52:b2:76:ac:4a:b6:79:
         41:b8:e6:35:c2:92:bb:a4:8f:83:04:39:63:c4:3b:99:96:a4:
         4a:89:f8:23:49:d4:da:82:2d:cc:2e:fc:5e:16:f8:ed:95:d2:
         7a:09:e4:42:a3:da:74:f2:da:48:37:06:75:d5:56:36:28:59:
         d6:9c:d0:e3:1d:f9:e4:46:e2:e5:0d:05:19:ab:de:72:dc:68:
         d3:6d:3d:a3:59:9e:b4:6b:37:69:e6:cd:17:08:bb:44:09:06:
         f3:c3:66:44:94:93:c2:54:4b:f8:ae:eb:7e:11:a9:8c:f6:b4:
         07:da:9c:4b:f1:fa:ee:24:cf:ae:c1:aa:e4:82:03:4d:30:d3:
         28:1a:2f:84:64:61:bc:27:da:47:81:0c:05:a4:ea:36:61:74:
         7b:6c:d9:31:81:7f:fa:7c:a9:02:5b:5c:ef:6d:95:84:59:f6:
         cc:84:2c:81:25:7a:ef:dc:99:4c:78:c4:b4:18:43:b4:a5:18:
         cc:63:75:ba:76:ef:96:7b:63:f9:7d:30:4a:3f:cc:f2:6a:ea:
         12:de:da:ab:a0:2d:42:a2:a1:64:24:5b:c4:b9:51:e6:14:8d:
         a1:1a:d6:bb:11:2c:23:cc:2d:6f:ca:4e:3e:11:ee:74:3a:2e:
         9c:da:fd:ba

为了检查ssl连接，我运行了下面的命令并得到了命令下面显示的输出
openssl s\u客户端-showcerts-连接xx.xx.xx.115:9093

CONNECTED(00000003)
depth=0 C = XX, ST = XX, L = XX, O = XXXX, OU = XX, CN = *
verify error:num=18:self signed certificate
verify return:1
depth=0 C = XX, ST = XX, L = XX, O = XXXX, OU = XX, CN = *
verify return:1
Certificate chain
0 s:/C=XX/ST=XX/L=XX/O=XXXX/OU=XX/CN=*
i:/C=XX/ST=XX/L=XX/O=XXXX/OU=XX/CN=*
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
1 s:/C=XX/ST=XX/L=XX/O=XXXX/OU=XX/CN=*
i:/C=XX/ST=XX/L=XX/O=XXXX/OU=XX/CN=*
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
Server certificate
subject=/C=XX/ST=XX/L=XX/O=XXXX/OU=XX/CN=*
issuer=/C=XX/ST=XX/L=XX/O=XXXX/OU=XX/CN=*
No client certificate CA names sent
Server Temp Key: ECDH, secp521r1, 521 bits
SSL handshake has read 2258 bytes and written 441 bytes
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES128-GCM-SHA256
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES128-GCM-SHA256
Session-ID: 5B3FA65DDE9A09886C1A725F46758274B810610F1DF11D23811773D44362A7F3
Session-ID-ctx:
Master-Key: 8105A8F49419A1D6AB3C06810FB3CCCF0A668DC7F812A9D5B2379AE7BAC4BEC0270A47C68E8A1B4549845E1B49CD2BF8
Key-Arg : None
Krb5 Principal: None
PSK identity: None
PSK identity hint: None
Start Time: 1530898013
Timeout : 300 (sec)
Verify return code: 18 (self signed certificate)

有人能帮我弄清楚我哪里会出错吗。