Prakhar, Mohammad's second point talks of a Shell (simple command) action, which is different from an SSH (remote login) action. The former will run as any other JavaAction, within the MR cluster. The latter will make an SSH logon to a specified destination if it is able to.
On Wed, Mar 14, 2012 at 3:22 PM, Prakhar Srivastava <[email protected]> wrote: > Hi Mohammad, > > Thanks for the response. > > As far as I have read, the SSH action requires one to *specify the remote > host* at which the command/script will be executing.(assuming that > command/scripts are present on the specified host machine). > > Your second point says about a restriction that the command will be *executed > on the hadoop cluster*. I think I am missing something because SSH action > and this restriction contradicts each other. > > Prakhar > > On Wed, Mar 14, 2012 at 2:26 PM, Mohammad Islam <[email protected]> wrote: > >> Hi Prakhar, >> Adding on Alejandro's comments. >> * SSH action was deprecated in earlier version. But this restriction has >> gone in the latest releases. SSH action will be there. I think it is the >> choice for your use case. >> >> * Just FYI, in 3.2+, oozie provides Shell action to run any shell command >> including perl/ruby/php provided they are installed in the compute node. >> Another restriction: the command will be executed in the Hadoop cluster >> which might not be your use case. >> >> Regards, >> Mohammad >> >> >> ________________________________ >> From: Prakhar Srivastava <[email protected]> >> To: [email protected] >> Sent: Tuesday, March 13, 2012 10:44 PM >> Subject: Re: Non hadoop job execution in oozie >> >> Hi Alejandro, >> Thanks for the response. >> >> I found out that ssh action is being deprecated in Oozie. If a user wants >> to launch a python/ruby script on a specified node, how can this be >> achieved in oozie. For instance, I wish to pull some data from the network, >> I would not like to execute this script on a Hadoop cluster. >> >> Oozie seems tightly coupled with the Hadoop cluster. Can it be extended for >> running ad-hoc jobs in workflow on non hadoop environment?? >> >> Prakhar >> >> On Wed, Mar 14, 2012 at 4:27 AM, Alejandro Abdelnur <[email protected] >> >wrote: >> >> > Prakhar, >> > >> > As you suspect, the SSH action is a the target SSH host specified in the >> > SSH action, it does not involved a Hadoop node. >> > >> > You have to create an SSH key for oozie and set the public key in the >> > target SSH host. >> > >> > hope this helps >> > >> > Alejandro >> > >> > On Tue, Mar 13, 2012 at 10:55 AM, Prakhar Srivastava >> > <[email protected]>wrote: >> > >> > > Hi, >> > > Oozie has a action node called ssh. Can someone throw some light on how >> > ssh >> > > action is executed. >> > > >> > > I found out that Java Action is executed as single mapper only job on >> one >> > > of the hadoop node. I want to just execute a python script on one of >> the >> > > node(not on hadoop cluster) of my choice. How can I accomplish this ?? >> > > >> > > Prakhar >> > > >> > >> -- Harsh J
