Intall mpich2

1. Testbed Introduction

• VMware Workstation 5.0
• Create three nodes, client-01 ~ client-03, all with 5GB HD and 128MB memory.
• The OS on these 3 nodes is Ubuntu-7.10-server
• hostname and IP are:
  • client-01 192.168.180.131
  • client-02 192.168.180.132
  • client-03 192.168.180.133

2. Getting Start to intall mpich2

• Step 1 : Modify /etc/hosts
  • Assume that we got 3 machines in our testbed, now we have to edit /etc/hosts on each node.
    Here is the example of client-01. So does the other two nodes.

    root@client-01:~# cat > /etc/hosts << "EOF"
    > 127.0.0.1 localhost
    > 192.168.180.131 client-01
    > 192.168.180.132 client-02
    > 192.168.180.133 client-03
    > EOF
    

  • Check the /etc/hosts contents, it should be like this.

    root@client-01:~# cat /etc/hosts
    127.0.0.1 localhost
    192.168.180.131 client-01
    192.168.180.132 client-02
    192.168.180.133 client-03
    

  • Notice that if there is 127.0.0.1 client-01 in /etc/hosts, it must be deleted.

• Step 2 : Download and Install mpich2
  • We use mpcich2-1.0.7rc1 for example.

    root@client-01:~# wget http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/mpich2-1.0.7rc1.tar.gz
    root@client-01:~# tar -zxvf mpich2-1.0.7rc1.tar.gz
    cd mpich2-1.0.7rc1/
    

  • You could choose the install location as you wish, but all the nodes must have the same install location!!
    We use /opt/mpich2 here for example.

    root@client-01:~/mpich2-1.0.7rc1# ./configure preifx=/opt/mpich2
    

    • If there are errors when configuring mpich2, you may need some packages or libraries such as c/c++ compiler.
      Try this :

      root@client-01:~/mpich2-1.0.7rc1# apt-get install build-essential
      

  • compile and install

    root@client-01:~/mpich2-1.0.7rc1# make
    root@client-01:~/mpich2-1.0.7rc1# make install
    

• Step 3 : Check if the Installation is Successful
  • Try these commands to see if the mpich2 have been installed correctly.

    root@client-01:~/mpich2-1.0.7rc1# which mpd
    /usr/local/bin/mpd
    root@client-01:~/mpich2-1.0.7rc1# which mpicc
    /usr/local/bin/mpicc
    root@client-01:~/mpich2-1.0.7rc1# which mpiexec
    /usr/local/bin/mpiexec
    root@client-01:~/mpich2-1.0.7rc1# which mpirun
    /usr/local/bin/mpirun
    

    • If there is nothing showed on the screen when enter which xxxx, you probably need to set your environment variables.

      root@client-01:~/mpich2-1.0.7rc1# export PATH="$PATH:/opt/mpich2/bin"
      

• Step 4 : Add New Configuration Files
  • Add mpd.host file on all the other nodes, you could put it anywhere in your system.

    root@client-01:~/mpich2-1.0.7rc1# touch mpd.hosts
    root@client-01:~/mpich2-1.0.7rc1# cat > mpd.hosts << "EOF"
    > client-01
    > client-02
    > client-03
    > EOF
    

  • Check if the content in mpd.hosts is correct.

    root@client-01:~/mpich2-1.0.7rc1# cat mpd.hosts
    client-01
    client-02
    client-03
    

  • Add /etc/mpd.conf on everynode, there is just one line.
    Notice that all the nodes must have the same password.
    We use "this_is_password" for example here.
    

    root@client-01:~/mpich2-1.0.7rc1# touch /etc/mpd.conf
    root@client-01:~/mpich2-1.0.7rc1# cat > /etc/mpd.conf << "EOF"
    > secretword=this_is_password
    > EOF
    

  • Change the file properties to 600 for security consideration.

    root@client-01:~/mpich2-1.0.7rc1# chmod 600 /etc/mpd.conf
    

• Step 5 : Modify SSH Connections
  • At first, you need to check if ssh have been installed on your machines.
    If not, you could try apt-get install ssh to install ssh.
    All nodes need to install ssh.
    
  • Second, now we are going to establish ssh connections between all nodes without entering password.
    Issue the following commands on ALL the other nodes.

    root@client-01:~/mpich2-1.0.7rc1# ssh-keygen -t dsa
    Generating public/private dsa key pair.
    Enter file in which to save the key (/root/.ssh/id_dsa):
    Created directory '/root/.ssh'.
    Enter passphrase (empty for no passphrase):
    Enter same passphrase again:
    Your identification has been saved in /root/.ssh/id_dsa.
    Your public key has been saved in /root/.ssh/id_dsa.pub.
    The key fingerprint is:
    d7:ad:ce:0f:e2:d8:16:3d:92:10:b8:b3:7f:7b:68:d9 root@client-01
    root@client-01:~/mpich2-1.0.7rc1#
    

  • Just press enter when the system promoting the messages.
  • Copy id_dsa.pub and overwrite to ./authorized_keys

    root@client-01:~/mpich2-1.0.7rc1# cd /root/.ssh/
    root@client-01:~/.ssh# cp ./id_dsa.pub ./authorized_keys
    

  • Copy all files under /root/.ssh/ and overwrite the same directory on all nodes.
  • Establish ssh connections to all other nodes from node1(client-01).
    While connecting to the other nodes first time, you need to enter 'yes'.
    Since you will be automatically login as root to all the other nodes without typing any password.
    If any error occurs, just remove /root/.ssh/known_hosts, and re-ssh.

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