环境：
- CentOS7
- 弹性搜索：5.2.2
- 木花 5.2.2
在 elasticsearch 中，当我安装 x-pack 时，我收到以下错误：
Exception in thread "main" java.net.UnknownHostException: artifacts.elastic.co
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1926)
at sun.net.www.protocol.http.HttpURLConnection$10.run(HttpURLConnection.java:1921)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1920)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1490)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at org.elasticsearch.plugins.InstallPluginCommand.downloadZip(InstallPluginCommand.java:279)
at org.elasticsearch.plugins.InstallPluginCommand.downloadZipAndChecksum(InstallPluginCommand.java:322)
at org.elasticsearch.plugins.InstallPluginCommand.download(InstallPluginCommand.java:231)
at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:210)
at org.elasticsearch.plugins.InstallPluginCommand.execute(InstallPluginCommand.java:195)
at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122)
at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:69)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122)
at org.elasticsearch.cli.Command.main(Command.java:88)
at org.elasticsearch.plugins.PluginCli.main(PluginCli.java:47)
Caused by: java.net.UnknownHostException: artifacts.elastic.co
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:668)
at sun.security.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:173)
at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1546)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:2982)
at java.net.URLConnection.getHeaderFieldLong(URLConnection.java:629)
at java.net.URLConnection.getContentLengthLong(URLConnection.java:501)
at java.net.URLConnection.getContentLength(URLConnection.java:485)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(HttpsURLConnectionImpl.java:398)
at org.elasticsearch.plugins.InstallPluginCommand.downloadZip(InstallPluginCommand.java:278)
... 10 more
我尝试了以下解决方案，但没有成功：
sudo vim /etc/hosts
我添加了
127.0.0.1 localhost
我被困在这一点上。如何解决此问题？
这时因为我的虚拟机不能连接外网造成的(这时因为我的虚拟机不能连接外网造成的(
在 Windows 网络连接 - 本地连接 - 共享 --- 整数连接共享检查已删除(在 windows中网络连接 -- 本地连接 -- 共享 --- Integer连接共享 勾选去掉(
尝试使用导出具有 http 和 https 设置的系统变量ES_JAVA_OPTS。在 ubuntu 中，你可以做这样的事情： export ES_JAVA_OPTS="$ES_JAVA_OPTS -Dhttp.proxyHost=host -Dhttp.proxyPort=port -Dhttps.proxyHost=host -Dhttps.proxyPort=post"
希望它有帮助，因为它解决了 6.0.0 版 elasticsearch 的相同问题