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Proxy access to cluster

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Revision as of 22:06, 14 March 2012 by imported>RobH
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Presently we do not have any kind of VPN access to our cluster (or labs). The preferred method by many Ops folks for accessing the web interfaces on these is via SSH -D option and FoxyProxy.

Some parts of these instructions are already documented on Labsconsole.

This document will outline how to setup this method of access. This method uses Firefox and the FoxyProxy addon linked above.

  • Install FireFox and FoxyProxy.
  • Download the FoxyProxy ruleset here.
  • In FoxyProxy settings, alternate click in the main window and select Import, then choose the wmf_foxyproxy_settings file you just downloaded.
  • Setup your SSH -D sessions.
  • You will need a session for each instance you wish to access: eqiad/pmtpa/sdtpa all use a single connection, labs needs a connection, and esams needs a connection.
  • It is suggested you load up a screen session, create two new windows, and load each SSH session into its own window. To do this run the following in terminal:
 ssh-add <path to your key for main cluster / esams>
 ssh -D 8080 (or bast1001)
 Ctrl+a c (creates new screen window)
 ssh-add <path to your key for labs>
 ssh bastion-restricted1 -D 8081
 Ctrl+a c (creates new screen window)
 ssh-add <path to your key for main cluster / esams>
 ssh -D 8082
 Ctrl+a d (disconnects you from the screen sessions, allowing you to close or otherwise use terminal)
  • Now when you load up the url patterns in the FoxyProxy settings, it will direct those URLs via your SSH tunnel to the correct cluster over the specified ports.
  • Please note that if you use OS X, you may want to 'exec ssh-agent bash' in your terminal screen sessions before adding your ssh key to ensure they are independently keyed and not shared across sessions.

The FoxyProxy URL patterns are listed below for ease of use, some are inclusive of others, but FoxyProxy in the past had some odd issues with them, so I find it best to just leave them all in the individual rulesets to eliminate potential issues.

Some of the patterns I use are inclusive of the others, mostly because I happened to setup mgmt and didnt bother with non-mgmt for awhile. So you could always clean it up and remove the stuff that is duplication due to pattern matching:

eqiad mgmt = *.mgmt.eqiad.wmnet*
pmtpa mgmt = *.mgmt.pmtpa.wmnet*
pmtpa local = *.pmtpa.wmnet*
eqiad local = *.eqiad.wmnet*
esams mgmt = *.mgmt.esams.wmnet*
esams local = *.esams.wmnet*
labs = *.pmtpa.wmflabs*