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We will assume that installation is performed on RHEL 6.5 or 6.6. We also assume that NFS is used for sharing files with master host.
Degree of sharing is not that important but generally $SGE_ROOT/$SGE_CELL should be shared. Efficiency consideration that are sited by many are overblown and without careful measurements and determining real bottleneck you might fall into classical trap called "premature optimization". And as Donald Knuth used to say "Premature optimization is the source of all evil". and long before him Talleyrand gave the following advice to young diplomats: "First and foremost, not too too much zeal". Just substitute "young diplomats" for novice SGE administrators.
The same issue applies to a choice between classic spooling vs. Berkeley DB. Without measurements the selection of Berkeley DB is fools gold.
We will use Son of Grid Engine as an example. Installation for other flavors of Grid Engine is very similar, although some like Oracle Grid engine and Univa are distributed as tar files, not RPMs (see Oracle Grid Engine for some information about tar files based installation). RPMs produce huge pain with dependencies. The problem is that for Son of Grid Engine 8.1.8 they are not documented and that makes this task painful "trial and error" process.
Installation consists of two main parts:
Some people also install shadow master on a different host which serves as backup headnode. This might help some maintenance tasks, but from the point of view of reliability does not get you much. It is simpler to have a cold reserve and move drives and network cable if head node hardware went south (chances for this event are pretty slim with modern hardware -- headnode is not loaded server that operates on the limit of its temperature regime, even if it simultaneously serves as NFS server). Head node can benefit from using SSDs. For simplicity we will avoid installing it. Remember the here we are discussing small clusters.
The master host installation procedure creates the appropriate directory hierarchy that the master daemon requires and starts the Grid Engine master daemon sge_qmaster on the master host (aka head node). The master host is also registered as a host with administrative and submit privileges.
If you do not plan to run jobs on master hosts (and for sizable cluster you should not do it) you do not need to install execution host on the head node. and if you install it you can later remove it from list of running daemons and shut it down.
If, at any time during the installation, you think something went wrong, you can quit the installation procedure and restart it. All installation is of master daemon is less then 30 min operation.
RPMs shipped with SGE are not real RPMs. Additional installation using SGE installation scripts is still required. They are more like proxy for tar files. In addition to storing files RPM serve as a tool to check presence of necessary libraries and Perl modules . Attempt to install binaries compiled for RHEL will fail on SLES because of libraries problems. Welcome to RPM hell...
Content of RPM can be viewed by using rpm -qlp file command
You can relocate installation directory from the default location /opt/SGE during installation using RPM option --prefix, for example
rpm -iv --prefix=/opt/sge/sge gridengine-8.1.8-1.el6.x86_64.rpm
But /opt/sge is good enough for most cases.
After that "real" installation should be performed as described below
For example see instructions for installation of Son of Grid engine from RPMs
RPMs installation creates the installation directory. You can also create it beforehand, probably as a separate partition. For example:
After that you need to create and export SGE_ROOT environment variable.
./util/setfileperm.sh $SGE_ROOTThis step is important as it creates several SUID-root executables
Note: this utility requres that gridengine-execd-8.1.8-1.el6.x86_64 RPM be installed on the master host too.
WARNING WARNING WARNING ----------------------- We will set the the file ownership and permission to UserID: 0 GroupID: 0 In directory: /opt/sge We will also install the following binaries as SUID-root: $SGE_ROOT/utilbin//rlogin $SGE_ROOT/utilbin//rsh $SGE_ROOT/utilbin//testsuidroot $SGE_ROOT/bin//sgepasswd $SGE_ROOT/bin//authuser Do you want to set the file permissions (yes/no) [NO] >> yes Verifying and setting file permissions and owner in >bin< Verifying and setting file permissions and owner in >examples< Verifying and setting file permissions and owner in >inst_sge< Verifying and setting file permissions and owner in >install_execd< Verifying and setting file permissions and owner in >install_qmaster< Verifying and setting file permissions and owner in >lib< Verifying and setting file permissions and owner in >mpi< Verifying and setting file permissions and owner in >pvm< Verifying and setting file permissions and owner in >util< Verifying and setting file permissions and owner in >utilbin< Verifying and setting file permissions and owner in >doc< Verifying and setting file permissions and owner in >man< Verifying and setting file permissions and owner in >qmon< Verifying and setting file permissions and owner in >start_gui_installer< Your file permissions were set
Full installation includes the following tasks:
GUI installer does not work in Son of Grid Engine 8.1.8. So you need to use command line installer.
# echo $SGE_ROOT
Check the content of /etc/services. You need to add two ports that are used by SGE. But default those are 6444 and 6445. You can change them to higher ports if necessary. (typically people use the default ports 6444 and 6445, but your mileage may vary; for example if you need two SGE instances they should use different ports)
If lines are missing (RPMs add those lines) then add lines manuallysge_qmaster 6444/tcp # Grid Engine Qmaster Service sge_qmaster 6444/udp # Grid Engine Qmaster Service sge_execd 6445/tcp # Grid Engine Execution Service sge_execd 6445/udp # Grid Engine Execution Service
Set an environment variable and then install the qmaster as such:
export SGE_ROOT=/opt/sge cd $SGE_ROOT ./install_qmaster
Now go through the interactive install process:
You will now be asked about port configuration for the master, normally you would choose the default (2) which uses the /etc/services file
You will now be asked about port configuration for the master, normally you would choose the default (2) which uses the /etc/services file
enter "classic" for classic spooling (berkeleydb may be more appropriate for large clusters)
accept the default spool dir or specify a different folder (for example if you wish to use a shared or local folder outside of SGE_ROOT
Now that we are back to a shell (finally) we need to add a few things to our root .bashrc so that we can access the SGE binaries. Add the following lines to /root/.bashrc
# SGE settings export SGE_ROOT=/usr/sge export SGE_CELL=default if [ -e $SGE_ROOT/$SGE_CELL ] then . $SGE_ROOT/$SGE_CELL/common/settings.sh fi
And then be sure to re-source your .bashrc
Now we can add our own username as an admin so that we can manage the system without becoming root.
qconf -am <myusername>
NOTE: You can automate steps listed below by creating a small script:
#!/bin/bash # # Post install operations for SGE execution host # . /$SGE_ROOT/default/common/settings.sh # Add sgeexecd.$SGE_CLUSTER_NAME (or whatever is your cluster name) to default services on level 3 and 5 chkconfig sgemaster.$SGE_CLUSTER_NAME on # On the execution host: start the sge_execd service service sgemaster.$SGE_CLUSTER_NAME start # add nessesary commands to /etc/profile echo ". /$SGE_ROOT/default/common/settings.sh" >> /etc/profile
# chkconfig sgemaster.$SGE_CLUSTER_NAME on sgemaster.p6444 0:off 1:off 2:on 3:on 4:on 5:on 6:off
# service sgemaster.$SGE_CLUSTER_NAME startNOTE: The first start takes two-three minutes of more. It's really slow even on a very fast server.
- Run the following command.ps -ef | grep sge
- You should see that the sge_master daemon is running.
- If you do not see similar output, the daemon required on the execution host is not running. Restart the daemon by hand. For example for Linux you can use service command:/sbin/service sgemaster.$SGE_CLUSTER_NAME start
Most SGE installation share the whole /opt/sge directory from the master host with Apps/sge as a subdirectory. It should be mounted under the same name on the execution host. See Usage of NFS in Grid Engine.
/opt/sge 10.194.186.254(rw,no_root_squash) 10.194.181.26(rw,no_root_squash)
Check if you can mount it on onr of execution hosts
# cat /etc/fstab | grep "/opt/sge" m17:/opt/sge /opt/sge nfs rw,hard,intr,tcp,rsize=32768,wsize=32768 1 2
If master host is simultaneously NFS server restart the NFS daemon on qmaster host to reread export file:
# service nfs restart Shutting down NFS mountd: [ OK ] Shutting down NFS daemon: [ OK ] Shutting down NFS quotas: [ OK ] Shutting down NFS services: [ OK ] Starting NFS services: [ OK ] Starting NFS quotas: [ OK ] Starting NFS daemon: [ OK ] Starting NFS mountd: [ OK ]
Create passwordless login environment.
Tip: If you already have configured it just copy file authorized_hosts from already configured execution host.
cd /root/.ssh scp sge01:/root/.ssh/authorized_hosts .Check ssh access from the master host to the node on which you install the execution host (b5 in the example below):
root@m17: # ssh b5 The authenticity of host 'b5 (10.194.181.46)' can't be established. RSA key fingerprint is 18:35:6e:96:11:77:27:fc:ac:1c:8e:46:36:2b:ae:2b. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'b5,10.194.181.46' (RSA) to the list of known hosts. Last login: Thu Jul 26 08:29:41 2012 from sge_master.firma.net
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