Re: Configuring SSH - is it required? for a psedo distriburted mode?
I never configure the ssh feature. Not for running on a single node and not for a full size cluster. I simply start all the required deamons (name/data/job/task) and configure them on which ports each can be reached. Niels Basjes On May 16, 2013 4:55 PM, "Raj Hadoop" wrote: > Hi, > > I have a dedicated user on Linux server for hadoop. I am installing it in > psedo distributed mode on this box. I want to test my programs on this > machine. But i see that in installation steps - they were mentioned that > SSH needs to be configured. If it is single node, I dont require it > ...right? Please advise. > > I was looking at this site > > http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ > > It menionted like this - > " > Hadoop requires SSH access to manage its nodes, i.e. remote machines plus > your local machine if you want to use Hadoop on it (which is what we want > to do in this short tutorial). For our single-node setup of Hadoop, we > therefore need to configure SSH access to localhost for the hduser user > we created in the previous section. > " > > Thanks, > Raj > >
Re: Configuring SSH - is it required? for a psedo distriburted mode?
Without passwordless ssh you can start it in pseudo-distributed mode. Instead of start-all.sh, start-dfs.sh etc, Use hadoop-daemon.sh start/stop eg: for starting jobtracker hadoop-daemon.sh start jobtracker On Fri, May 17, 2013 at 4:45 PM, Bertrand Dechoux wrote: > The scrits themselves will use ssh to connect to every machine (even > localhost). > It's up to you if you want to type the password everytime. For a > pseudo-distributed system, I don't see the issue with configuring a local > ssh access. > > BUT Hadoop in itself does not require ssh. If you have a more appropriate > way to start/stop the processes, you can write your own scripts. > > Regards > > Bertrand > > > > On Thu, May 16, 2013 at 6:02 PM, Mohammad Tariq wrote: > >> Hello Raj, >> >> ssh is actually 2 things : >> 1- ssh : The command we use to connect to remote machines - the client. >> 2- sshd : The daemon that is running on the server and allows clients to >> connect to the server. >> ssh is pre-enabled on Linux, but in order to start sshd daemon, we need >> to install ssh first. >> >> To start the Hadoop daemons you have to make ssh passwordless and issue >> bin/start-dfs.sh and bin/start-mapred.sh. >> >> You might find this >> link<http://cloudfront.blogspot.in/2012/07/how-to-setup-and-configure-ssh-on-ubuntu.html#.UZUCkUAW38s> >> useful. >> >> Warm Regards, >> Tariq >> cloudfront.blogspot.com >> >> >> On Thu, May 16, 2013 at 9:26 PM, Raj Hadoop wrote: >> >>> Hi, >>> >>> I am a bit confused here. I am planning to run on a single machine. >>> >>> So what should i do to start hadoop processes. How should I do an SSH? >>> Can you please breifly explain me what SSH is? >>> >>> Thanks, >>> Raj >>> *From:* Jay Vyas >>> *To:* "common-u...@hadoop.apache.org" >>> *Cc:* Raj Hadoop >>> *Sent:* Thursday, May 16, 2013 11:34 AM >>> *Subject:* Re: Configuring SSH - is it required? for a psedo >>> distriburted mode? >>> >>> Actually, I should amend my statement -- SSH is required, but >>> passwordless ssh (i guess) you can live without if you are willing to enter >>> your password for each process that gets started. >>> >>> But Why wouldn't you want to implement passwordless ssh in a pseudo >>> distributed cluster ? Its very easy to implement on a single node: >>> >>> cat ~/.ssh/id_rsa.pub /root/.ssh/authorized_keys >>> >>> >>> >>> >>> On Thu, May 16, 2013 at 11:31 AM, Jay Vyas wrote: >>> >>> Yes it is required -- in psuedodistributed node the jobtracker is not >>> necessarily aware that the task trackers / data nodes are on the same >>> machine, and will thus attempt to ssh into them when starting the >>> respective deamons etc (i.e. start-all.sh) >>> >>> >>> On Thu, May 16, 2013 at 11:21 AM, kishore alajangi < >>> alajangikish...@gmail.com> wrote: >>> >>> When you start the hadoop procecess, each process will ask the >>> password to start, to overcome this we will configure SSH if you use single >>> node or multiple nodes for each process, if you can enter the password for >>> each process Its not a mandatory even if you use multiple systems. >>> >>> Thanks, >>> Kishore. >>> >>> >>> On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop wrote: >>> >>> Hi, >>> >>> I have a dedicated user on Linux server for hadoop. I am installing it >>> in psedo distributed mode on this box. I want to test my programs on this >>> machine. But i see that in installation steps - they were mentioned that >>> SSH needs to be configured. If it is single node, I dont require it >>> ...right? Please advise. >>> >>> I was looking at this site >>> >>> http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ >>> >>> It menionted like this - >>> " >>> Hadoop requires SSH access to manage its nodes, i.e. remote machines >>> plus your local machine if you want to use Hadoop on it (which is what we >>> want to do in this short tutorial). For our single-node setup of Hadoop, we >>> therefore need to configure SSH access to localhost for the hduser user >>> we created in the previous section. >>> " >>> >>> Thanks, >>> Raj >>> >>> >>> >>> >>> >>> >>> -- >>> Jay Vyas >>> http://jayunit100.blogspot.com/ >>> >>> >>> >>> >>> -- >>> Jay Vyas >>> http://jayunit100.blogspot.com/ >>> >>> >>> >> >
Re: Configuring SSH - is it required? for a psedo distriburted mode?
The scrits themselves will use ssh to connect to every machine (even localhost). It's up to you if you want to type the password everytime. For a pseudo-distributed system, I don't see the issue with configuring a local ssh access. BUT Hadoop in itself does not require ssh. If you have a more appropriate way to start/stop the processes, you can write your own scripts. Regards Bertrand On Thu, May 16, 2013 at 6:02 PM, Mohammad Tariq wrote: > Hello Raj, > > ssh is actually 2 things : > 1- ssh : The command we use to connect to remote machines - the client. > 2- sshd : The daemon that is running on the server and allows clients to > connect to the server. > ssh is pre-enabled on Linux, but in order to start sshd daemon, we need to > install ssh first. > > To start the Hadoop daemons you have to make ssh passwordless and issue > bin/start-dfs.sh and bin/start-mapred.sh. > > You might find this > link<http://cloudfront.blogspot.in/2012/07/how-to-setup-and-configure-ssh-on-ubuntu.html#.UZUCkUAW38s> > useful. > > Warm Regards, > Tariq > cloudfront.blogspot.com > > > On Thu, May 16, 2013 at 9:26 PM, Raj Hadoop wrote: > >> Hi, >> >> I am a bit confused here. I am planning to run on a single machine. >> >> So what should i do to start hadoop processes. How should I do an SSH? >> Can you please breifly explain me what SSH is? >> >> Thanks, >> Raj >> *From:* Jay Vyas >> *To:* "common-u...@hadoop.apache.org" >> *Cc:* Raj Hadoop >> *Sent:* Thursday, May 16, 2013 11:34 AM >> *Subject:* Re: Configuring SSH - is it required? for a psedo >> distriburted mode? >> >> Actually, I should amend my statement -- SSH is required, but >> passwordless ssh (i guess) you can live without if you are willing to enter >> your password for each process that gets started. >> >> But Why wouldn't you want to implement passwordless ssh in a pseudo >> distributed cluster ? Its very easy to implement on a single node: >> >> cat ~/.ssh/id_rsa.pub /root/.ssh/authorized_keys >> >> >> >> >> On Thu, May 16, 2013 at 11:31 AM, Jay Vyas wrote: >> >> Yes it is required -- in psuedodistributed node the jobtracker is not >> necessarily aware that the task trackers / data nodes are on the same >> machine, and will thus attempt to ssh into them when starting the >> respective deamons etc (i.e. start-all.sh) >> >> >> On Thu, May 16, 2013 at 11:21 AM, kishore alajangi < >> alajangikish...@gmail.com> wrote: >> >> When you start the hadoop procecess, each process will ask the password >> to start, to overcome this we will configure SSH if you use single node or >> multiple nodes for each process, if you can enter the password for each >> process Its not a mandatory even if you use multiple systems. >> >> Thanks, >> Kishore. >> >> >> On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop wrote: >> >> Hi, >> >> I have a dedicated user on Linux server for hadoop. I am installing it in >> psedo distributed mode on this box. I want to test my programs on this >> machine. But i see that in installation steps - they were mentioned that >> SSH needs to be configured. If it is single node, I dont require it >> ...right? Please advise. >> >> I was looking at this site >> >> http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ >> >> It menionted like this - >> " >> Hadoop requires SSH access to manage its nodes, i.e. remote machines plus >> your local machine if you want to use Hadoop on it (which is what we want >> to do in this short tutorial). For our single-node setup of Hadoop, we >> therefore need to configure SSH access to localhost for the hduser user >> we created in the previous section. >> " >> >> Thanks, >> Raj >> >> >> >> >> >> >> -- >> Jay Vyas >> http://jayunit100.blogspot.com/ >> >> >> >> >> -- >> Jay Vyas >> http://jayunit100.blogspot.com/ >> >> >> >
Re: Configuring SSH - is it required? for a psedo distriburted mode?
Hello Raj, ssh is actually 2 things : 1- ssh : The command we use to connect to remote machines - the client. 2- sshd : The daemon that is running on the server and allows clients to connect to the server. ssh is pre-enabled on Linux, but in order to start sshd daemon, we need to install ssh first. To start the Hadoop daemons you have to make ssh passwordless and issue bin/start-dfs.sh and bin/start-mapred.sh. You might find this link<http://cloudfront.blogspot.in/2012/07/how-to-setup-and-configure-ssh-on-ubuntu.html#.UZUCkUAW38s> useful. Warm Regards, Tariq cloudfront.blogspot.com On Thu, May 16, 2013 at 9:26 PM, Raj Hadoop wrote: > Hi, > > I am a bit confused here. I am planning to run on a single machine. > > So what should i do to start hadoop processes. How should I do an SSH? Can > you please breifly explain me what SSH is? > > Thanks, > Raj > *From:* Jay Vyas > *To:* "common-u...@hadoop.apache.org" > *Cc:* Raj Hadoop > *Sent:* Thursday, May 16, 2013 11:34 AM > *Subject:* Re: Configuring SSH - is it required? for a psedo distriburted > mode? > > Actually, I should amend my statement -- SSH is required, but > passwordless ssh (i guess) you can live without if you are willing to enter > your password for each process that gets started. > > But Why wouldn't you want to implement passwordless ssh in a pseudo > distributed cluster ? Its very easy to implement on a single node: > > cat ~/.ssh/id_rsa.pub /root/.ssh/authorized_keys > > > > > On Thu, May 16, 2013 at 11:31 AM, Jay Vyas wrote: > > Yes it is required -- in psuedodistributed node the jobtracker is not > necessarily aware that the task trackers / data nodes are on the same > machine, and will thus attempt to ssh into them when starting the > respective deamons etc (i.e. start-all.sh) > > > On Thu, May 16, 2013 at 11:21 AM, kishore alajangi < > alajangikish...@gmail.com> wrote: > > When you start the hadoop procecess, each process will ask the password > to start, to overcome this we will configure SSH if you use single node or > multiple nodes for each process, if you can enter the password for each > process Its not a mandatory even if you use multiple systems. > > Thanks, > Kishore. > > > On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop wrote: > > Hi, > > I have a dedicated user on Linux server for hadoop. I am installing it in > psedo distributed mode on this box. I want to test my programs on this > machine. But i see that in installation steps - they were mentioned that > SSH needs to be configured. If it is single node, I dont require it > ...right? Please advise. > > I was looking at this site > > http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ > > It menionted like this - > " > Hadoop requires SSH access to manage its nodes, i.e. remote machines plus > your local machine if you want to use Hadoop on it (which is what we want > to do in this short tutorial). For our single-node setup of Hadoop, we > therefore need to configure SSH access to localhost for the hduser user > we created in the previous section. > " > > Thanks, > Raj > > > > > > > -- > Jay Vyas > http://jayunit100.blogspot.com/ > > > > > -- > Jay Vyas > http://jayunit100.blogspot.com/ > > >
Re: Configuring SSH - is it required? for a psedo distriburted mode?
Hi, I am a bit confused here. I am planning to run on a single machine. So what should i do to start hadoop processes. How should I do an SSH? Can you please breifly explain me what SSH is? Thanks, Raj From: Jay Vyas To: "common-u...@hadoop.apache.org" Cc: Raj Hadoop Sent: Thursday, May 16, 2013 11:34 AM Subject: Re: Configuring SSH - is it required? for a psedo distriburted mode? Actually, I should amend my statement -- SSH is required, but passwordless ssh (i guess) you can live without if you are willing to enter your password for each process that gets started. But Why wouldn't you want to implement passwordless ssh in a pseudo distributed cluster ? Its very easy to implement on a single node: cat ~/.ssh/id_rsa.pub /root/.ssh/authorized_keys On Thu, May 16, 2013 at 11:31 AM, Jay Vyas wrote: Yes it is required -- in psuedodistributed node the jobtracker is not necessarily aware that the task trackers / data nodes are on the same machine, and will thus attempt to ssh into them when starting the respective deamons etc (i.e. start-all.sh) > > > > >On Thu, May 16, 2013 at 11:21 AM, kishore alajangi >wrote: > >When you start the hadoop procecess, each process will ask the password to >start, to overcome this we will configure SSH if you use single node or >multiple nodes for each process, if you can enter the password for each >process Its not a mandatory even if you use multiple systems. >> >>Thanks, >>Kishore. >> >> >> >>On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop wrote: >> >> Hi, >>> >>>I have a dedicated user on Linux server for hadoop. I am installing it in >>>psedo distributed mode on this box. I want to test my programs on this >>>machine. But i see that in installation steps - they were mentioned that SSH >>>needs to be configured. If it is single node, I dont require it ...right? >>>Please advise. >>> >>>I was looking at this site >>>http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ >>> >>>It menionted like this - >>>"Hadoop requires SSH access to manage its nodes, i.e. remote machines plus >>>your local machine if you want to use Hadoop on it (which is what we want to >>>do in this short tutorial). For our single-node setup of Hadoop, we >>>therefore need to configure SSH access to localhost for the hduser user we >>>created in the previous section. >>>" >>> >>>Thanks, >>>Raj >>> >> > > >-- >Jay Vyas >http://jayunit100.blogspot.com/ -- Jay Vyas http://jayunit100.blogspot.com/
Re: Configuring SSH - is it required? for a psedo distriburted mode?
Actually, I should amend my statement -- SSH is required, but passwordless ssh (i guess) you can live without if you are willing to enter your password for each process that gets started. But Why wouldn't you want to implement passwordless ssh in a pseudo distributed cluster ? Its very easy to implement on a single node: cat ~/.ssh/id_rsa.pub /root/.ssh/authorized_keys On Thu, May 16, 2013 at 11:31 AM, Jay Vyas wrote: > Yes it is required -- in psuedodistributed node the jobtracker is not > necessarily aware that the task trackers / data nodes are on the same > machine, and will thus attempt to ssh into them when starting the > respective deamons etc (i.e. start-all.sh) > > > On Thu, May 16, 2013 at 11:21 AM, kishore alajangi < > alajangikish...@gmail.com> wrote: > >> When you start the hadoop procecess, each process will ask the password >> to start, to overcome this we will configure SSH if you use single node or >> multiple nodes for each process, if you can enter the password for each >> process Its not a mandatory even if you use multiple systems. >> >> Thanks, >> Kishore. >> >> >> On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop wrote: >> >>> Hi, >>> >>> I have a dedicated user on Linux server for hadoop. I am installing it >>> in psedo distributed mode on this box. I want to test my programs on this >>> machine. But i see that in installation steps - they were mentioned that >>> SSH needs to be configured. If it is single node, I dont require it >>> ...right? Please advise. >>> >>> I was looking at this site >>> >>> http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ >>> >>> It menionted like this - >>> " >>> Hadoop requires SSH access to manage its nodes, i.e. remote machines >>> plus your local machine if you want to use Hadoop on it (which is what we >>> want to do in this short tutorial). For our single-node setup of Hadoop, we >>> therefore need to configure SSH access to localhost for the hduser user >>> we created in the previous section. >>> " >>> >>> Thanks, >>> Raj >>> >>> >> >> > > > -- > Jay Vyas > http://jayunit100.blogspot.com > -- Jay Vyas http://jayunit100.blogspot.com
Re: Configuring SSH - is it required? for a psedo distriburted mode?
Yes it is required -- in psuedodistributed node the jobtracker is not necessarily aware that the task trackers / data nodes are on the same machine, and will thus attempt to ssh into them when starting the respective deamons etc (i.e. start-all.sh) On Thu, May 16, 2013 at 11:21 AM, kishore alajangi < alajangikish...@gmail.com> wrote: > When you start the hadoop procecess, each process will ask the password to > start, to overcome this we will configure SSH if you use single node or > multiple nodes for each process, if you can enter the password for each > process Its not a mandatory even if you use multiple systems. > > Thanks, > Kishore. > > > On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop wrote: > >> Hi, >> >> I have a dedicated user on Linux server for hadoop. I am installing it in >> psedo distributed mode on this box. I want to test my programs on this >> machine. But i see that in installation steps - they were mentioned that >> SSH needs to be configured. If it is single node, I dont require it >> ...right? Please advise. >> >> I was looking at this site >> >> http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ >> >> It menionted like this - >> " >> Hadoop requires SSH access to manage its nodes, i.e. remote machines plus >> your local machine if you want to use Hadoop on it (which is what we want >> to do in this short tutorial). For our single-node setup of Hadoop, we >> therefore need to configure SSH access to localhost for the hduser user >> we created in the previous section. >> " >> >> Thanks, >> Raj >> >> > > -- Jay Vyas http://jayunit100.blogspot.com
Re: Configuring SSH - is it required? for a psedo distriburted mode?
When you start the hadoop procecess, each process will ask the password to start, to overcome this we will configure SSH if you use single node or multiple nodes for each process, if you can enter the password for each process Its not a mandatory even if you use multiple systems. Thanks, Kishore. On Thu, May 16, 2013 at 8:24 PM, Raj Hadoop wrote: > Hi, > > I have a dedicated user on Linux server for hadoop. I am installing it in > psedo distributed mode on this box. I want to test my programs on this > machine. But i see that in installation steps - they were mentioned that > SSH needs to be configured. If it is single node, I dont require it > ...right? Please advise. > > I was looking at this site > > http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ > > It menionted like this - > " > Hadoop requires SSH access to manage its nodes, i.e. remote machines plus > your local machine if you want to use Hadoop on it (which is what we want > to do in this short tutorial). For our single-node setup of Hadoop, we > therefore need to configure SSH access to localhost for the hduser user > we created in the previous section. > " > > Thanks, > Raj > >
Configuring SSH - is it required? for a psedo distriburted mode?
Hi, I have a dedicated user on Linux server for hadoop. I am installing it in psedo distributed mode on this box. I want to test my programs on this machine. But i see that in installation steps - they were mentioned that SSH needs to be configured. If it is single node, I dont require it ...right? Please advise. I was looking at this site http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ It menionted like this - "Hadoop requires SSH access to manage its nodes, i.e. remote machines plus your local machine if you want to use Hadoop on it (which is what we want to do in this short tutorial). For our single-node setup of Hadoop, we therefore need to configure SSH access to localhost for the hduser user we created in the previous section. " Thanks, Raj
