E-MapReduce:Access the web UIs of open source components over an SSH tunnel

Connect using a private key file

ssh -i <private-key-file-path> -N -L <local-port>:<master-node-name>:<component-port> root@<master-node-public-ip>

Connect using a username and password

ssh -N -L <local-port>:<master-node-name>:<component-port> root@<master-node-public-ip>

Connect using a private key file

ssh -i <private-key-file-path> -N -D <local-port> root@<master-node-public-ip>

Connect using a username and password

ssh -N -D <local-port> root@<master-node-public-ip>

Option A: CLI

1. Open a terminal and go to the Google Chrome installation directory for your operating system.

   Operating system	Default installation directory
   macOS X	/Applications/Google\ Chrome.app/Contents/macOS
   Linux	/usr/bin/google-chrome
   Windows (64-bit)	C:\Program Files\Google\Chrome\Application\
   Windows (32-bit)	C:\Program Files (x86)\Google\Chrome\Application\

2. Launch Google Chrome with the SOCKS proxy settings. Replace 8157 with the local port you configured in Step 1.

   macOS X

   ./Google\ Chrome --proxy-server="socks5://localhost:8157" --host-resolver-rules="MAP * 0.0.0.0 , EXCLUDE localhost" --user-data-dir=/tmp/

   Linux

   chrome --proxy-server="socks5://localhost:8157" --host-resolver-rules="MAP * 0.0.0.0 , EXCLUDE localhost" --user-data-dir=/tmp/

   Windows

   chrome --proxy-server="socks5://localhost:8157" --host-resolver-rules="MAP * 0.0.0.0 , EXCLUDE localhost" --user-data-dir=c:\\tmppath\\

Option B: SwitchyOmega extension

The SwitchyOmega extension lets you switch between direct and proxy browsing within the same browser window.

1. Add the SwitchyOmega extension to Google Chrome.

2. In the left-side navigation pane, click New profile. In the New Profile dialog box, enter a name in the Profile name field (for example, SSH tunnel), select PAC Profile, and then click Create.

3. In the PAC Script editor, paste the following script. Replace all occurrences of 8157 with the local port you configured in Step 1.

   function regExpMatch(url, pattern) {
     try {
       return new RegExp(pattern).test(url);
     } catch (ex) {
       return false;
     }
   }
   
   function FindProxyForURL(url, host) {
     if (shExpMatch(url, "*localhost*")) return "SOCKS5 localhost:8157";
     if (shExpMatch(url, "*emr-header*")) return "SOCKS5 localhost:8157";
     if (shExpMatch(url, "*emr-worker*")) return "SOCKS5 localhost:8157";
     if (shExpMatch(url, "*master*")) return "SOCKS5 localhost:8157";
     if (shExpMatch(url, "*core*")) return "SOCKS5 localhost:8157";
     return 'DIRECT';
   }

4. In the left-side navigation pane, click Apply changes.

5. In the upper-right corner of the browser, select the SSH tunnel profile you created.