Hi, Menno and Aseem. Thank you for your help! With your help, I can now use ssh to connect each node without providing the username.
However, another problem occurs. The directory structures are different among the servers, so when I use the starting script "start-all.sh" to start hadoop, it seems to run the bash using the structure exactly to the namenode. For example, the namenode(in server0) structure is like "/home/user0/hadoop/...", slave1(in server1) is like "/home/s/user1/hadoop/...", and slave2(in server2) is like "/home/u/user2/proj/hadoop/...". When I run start-all.sh, this message is shown: " starting namenode, logging to /home/user0/hadoop/bin/... server1: bash: line 0: cd: /home/user0/hadoop/bin/..: No such file or directory server1: bash: /home/user0/hadoop/bin/hadoop-daemon.sh: No such file or directory server2: bash: line 0: cd: /home/user0/hadoop/bin/..: No such file or directory server2: bash: /home/user0/hadoop/bin/hadoop-daemon.sh: No such file or directory ...... " It seemed all the nodes should have the same structure to run hadoop. But I have no admin privillege on these servers, so I cannot create the exact directory as the namenode. Is there any way to let the nodes with different structures to run it? How can I configure it? Again, thank you all for your kind help!!! Starry /* Tomorrow is another day. So is today. */ On Mon, May 4, 2009 at 22:09, Puri, Aseem <aseem.p...@honeywell.com> wrote: > Starry, > > In ".ssh" directory you have to create a file "config" (without > extension) on every node. > > Suppose server1 is your master and server2, server3 is your slave. > > On the master (server1), in the "config" file and add the following > lines: > > Host server2 > User user2 > Host server3 > User user3 > > On both slave (server2, server3) nodes, in the "config" file and add the > following lines: > > Host server1 > User user1 > > Hope it works for you > > Regards > Aseem Puri > > > -----Original Message----- > From: Menno Luiten [mailto:mlui...@artifix.net] > Sent: Monday, May 04, 2009 7:27 PM > To: core-user@hadoop.apache.org > Subject: RE: How to configure nodes with different user account? > > Hi Starry, > > What is the content of your 'slaves' file in the hadoop/conf directory > of your master node? > It should say something like: > > localhost > us...@server2 > us...@server3 > us...@server4 > > This should let the start-up scripts try and login using the proper > users. > > Hope that helps, > Menno > > -----Oorspronkelijk bericht----- > Van: Starry SHI [mailto:starr...@gmail.com] > Verzonden: maandag 4 mei 2009 10:53 > Aan: core-user@hadoop.apache.org > Onderwerp: How to configure nodes with different user account? > > Hi, all. I am new to Hadoop and I have a question to ask~ > > I have several accounts located in different linux servers (normal > user privilege, no admin authority), and i want to use them to form a > small cluster to run Hadoop applications. However, the usernames for > these accounts are different. I want to use shared key to connect all > the nodes, but I failed after several attempts. Is it possible to > connect all of them via different account? > > For example, I have 3 account: us...@server1, us...@server2, > us...@server3. After assigning authorized keys, I can use "ssh > us...@server2" without input the password. But when I start hadoop, I > was asked to input the password for us...@server2 (when I have already > logged in as user1). > > Can my problem be solved easily? I wish to get your help soon. > > Thank you for all your attention and help! > > Best regards, > Starry > >
