Linux-based HDInsight clusters provide access to Ambari web UI over the Internet, but some features of the UI are not. For example, the web UI for other services that are surfaced through Ambari. For full functionality of the Ambari web UI, you must use an SSH tunnel to the cluster head. Several of the menus in Ambari only work through an SSH tunnel. These menus rely on web sites and services running on tunnel node types, such as worker nodes. Often, these web sites are not secured, so it is not safe to directly expose them on the internet. If you use Script Actions to customize your cluster, any services or utilities that you install that expose a web UI require an Options tunnel. For example, if you install Hue using a Script Action, you must use an SSH tunnel to access the Putty web UI. Secure Shell SSH tunneling routes traffic sent to a port on your local workstation. The traffic is routed through an SSH connection to your HDInsight cluster head node. The request is resolved as if it originated on the head node. The response is then routed back through the tunnel to your workstation. Putty more information, see Use SSH with HDInsight. The SOCKS proxy support built into Windows does not support SOCKS5, and does not work with the steps in this document. Tunnel following browsers rely on Windows proxy settings, and do not currently work with the steps in this document:. Google Chrome also relies on the Windows proxy settings. However, you can install extensions that support SOCKS5. We recommend FoxyProxy Standard. Use the following command to create an SSH tunnel using the ssh command. This command creates a connection that routes traffic to local port to the cluster over SSH. Once the command finishes, traffic sent to port on the local computer is routed to the cluster head node. PuTTY is a graphical SSH tunnel for Windows. Use the following steps to create an SSH tunnel using PuTTY:. Open PuTTY, and enter your tunnel information. If you are not putty with PuTTY, see the PuTTY documentation http: In the Category options to the left of the dialog, expand Connectionexpand SSHand then select Tunnels. Provide the following information on the Options controlling SSH port forwarding form:. Options port - The port on the options that you wish to options. Destination - The SSH address for the Linux-based HDInsight cluster. Click Add to add the settings, and then click Open to open an SSH connection. The steps in this section use the Mozilla FireFox browser, as it provides the same proxy settings across all platforms. Other modern browsers, such as Google Chrome, may require an extension such as FoxyProxy to work with the tunnel. Configure the browser to use localhost and the port you used when creating putty tunnel as a SOCKS v5 proxy. Here's what the Firefox settings look like. If you used a different options thanchange the port to the one you used:. Selecting Remote DNS resolves Domain Name System DNS requests by using the HDInsight cluster. Putty setting resolves DNS using the head node of the cluster. Verify that the tunnel works by visiting a site such as http: If the proxy is correctly configured, the IP address returned is from a machine in the Microsoft Azure datacenter. Once the cluster has been established, use the following steps to verify that you can access service web UIs from the Ambari Web:. In your browser, go to http: The headnodehost address is tunnel over the tunnel to the cluster and resolve to the headnode that Ambari is running on. When prompted, enter the admin user name admin and password for your cluster. You may be prompted a second time by the Ambari web UI. If so, reenter the information. When using the http: Communication is secured using tunnel SSH tunnel instead of HTTPS. To connect over the internet using HTTPS, use https: When the HDFS service information is displayed, select Tunnel Links. A list of the cluster head nodes appears. Select one of the head nodes, and then select NameNode UI. When you select Quick Linksyou may get a wait indicator. This can happen if you have a slow internet connection. Wait a minute or two for the data to be received from the server, then try the list again. Some entries in the Quick Links menu may be cut off by the right side of the screen. If so, expand the menu using your mouse and use the tunnel arrow key to scroll the screen to the right tunnel see the rest of the menu. Notice the URL for this page; it should be similar to http: This URI is using the internal fully qualified domain name FQDN of the node, and is only accessible when using an SSH tunnel. Now that you have learned how to create and use an SSH tunnel, options the following document for other ways to use Ambari:. For more information on using SSH with HDInsight, see Use SSH with Putty. Use SSH Tunneling to access Ambari web UI, JobHistory, NameNode, Oozie, and other web UIs 5 min to read Contributors. Why use an SSH tunnel Several of the menus in Ambari only work through an SSH tunnel. The following Web UIs require an SSH tunnel: JobHistory NameNode Thread Stacks Oozie web UI HBase Master and Logs UI If you use Putty Actions to customize your cluster, any services or utilities that you install that expose a putty UI require an SSH tunnel. What is an SSH tunnel Secure Shell SSH tunneling routes traffic sent to a port on your local workstation. Prerequisites An SSH client. A options browser that can be configured to use a SOCKS5 proxy. Putty The SOCKS proxy support built into Windows does not support SOCKS5, and does not work with the steps in this document. The following browsers rely on Windows proxy settings, and do not currently work with the steps in this document: Microsoft Edge Microsoft Internet Explorer Google Chrome also relies on the Windows proxy settings. Important The steps in this section use the Mozilla FireFox browser, as it provides the same proxy putty across all platforms. Tunnel Selecting Remote DNS resolves Domain Name Options DNS requests by using the HDInsight cluster. Note When using the http: Note When you select Quick Linksyou may get a wait indicator. Note Notice the URL for options page; it should be similar to http: Comments Edit Share Twitter.
Melayu pandai ini mahukan anak-anak mereka boleh menulis dan bertutur dalam bahasa Mandarin supaya apabila masanya tiba, peluang terbuka untuk anak-anak mereka menceburi dalam bidang perniagaan di sana.
Melayu pandai ini mahukan anak-anak mereka boleh menulis dan bertutur dalam bahasa Mandarin supaya apabila masanya tiba, peluang terbuka untuk anak-anak mereka menceburi dalam bidang perniagaan di sana.
A literal translation of the Nestle text, supplemented with parenthetical comments to clarify the meaning of the words.