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我Elastic Search通过创建自签名证书来运行带有 SSL 的实例。elastic从 R 通过包连接时遇到问题。这就是我的进步：

启用 SSL 后，当我尝试连接到 Elastic Search 实例时，出现以下错误：

$ curl -u $USER:$PASS 'https://localhost:9200/_cat/health?v'
curl: (60) Peer certificate cannot be authenticated with known CA certificates
More details here: http://curl.haxx.se/docs/sslcerts.html

curl performs SSL certificate verification by default, using a "bundle"
 of Certificate Authority (CA) public keys (CA certs). If the default
 bundle file isn't adequate, you can specify an alternate file
 using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
 the bundle, the certificate verification probably failed due to a
 problem with the certificate (it might be expired, or the name might
 not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
 the -k (or --insecure) option.

很明显，这个问题是因为证书不受信任。一种方法是将自签名证书添加到信任库，但我不知道它在哪里。另一种方法是通过添加 -k 来跳过证书验证。但我想表演它。因此，我找到了一种解决方法，只需指定root-ca.pem如下：

$ curl -u $USER:$PASS 'https://localhost:9200/_cat/health?v' --cacert /home/user/root-ca.pem
epoch      timestamp cluster     status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1479462058 03:40:58  es-cluster yellow          1         1    365 365    0    0      364             0                  -                 50.1%

然后另一个 SO 问题帮助我创建了一个文件~/.curlrc，如下所示：

$ cat ~/.curlrc
capath=/home/user/

之后，我什至不必指定证书。

$ curl -u $USER:$PASS 'https://localhost:9200/_cat/health?v'
epoch      timestamp cluster     status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1479462172 03:42:52  es-cluster yellow          1         1    365 365    0    0      364             0                  -                 50.1%

到目前为止一切顺利，但现在当我尝试从R. 我收到以下错误。

> library(elastic)
> connect(es_base = "https://localhost", es_port = 9200, es_user = USER,   es_pwd = PASS)
Error:
  Failed to connect to https://127.0.0.1:9200
  Remember to start Elasticsearch before connecting

日志报告unknown_ca错误。elasticR 包可能正在使用 httr/curl 进行连接，但我不知道如何指定证书。我在这里提到了解决方案，但它适用于RCurl.

请建议。

版本：

  • R：3.3.1
  • R（弹性包装）：0.7.8
  • 弹性搜索：2.4.1
  • 操作系统：RHEL 6.7
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1 回答 1

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正如@sckott 所建议的，我必须设置cainfo参数。以下是我的情况：

library(elastic)
library(httr)
set_config(config(cainfo = "/home/user/root-ca.pem"))
connect(es_base = "https://localhost", es_port = 9200, es_user = USER,   es_pwd = PASS)

谢谢斯科特。

于 2016-11-22T04:21:49.577 回答