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• Compute node has already been added to the VCL database
• Compute node installed with Linux distro, distro's currently supported are
  • CentOS,Redhat AS,Fedora core, Ubuntu
• Two network adapters enabled on compute node OS, i.e. eth0, eth1
• Ability to login as root via ssh identity key on the private network from management node.
  • This requires a private public ssh keys, the private key is to be listed in the management node's vcl profile identity keys section. The public key will need to copied into the /root/.ssh/authorized_keys file on the target compute node.

Setting up the OS for VCL

The main dependency for linux OS's is that the vcl management node has to login as root over ssh using an ssh identity key on the private network, which is normally eth0. This means there are two distinct ssh services, one for the private network and one for the external public network.

• Private ssh service uses /etc/ssh/sshd_config
  • Purpose is to listen only on the private IP address and allows root access from the management node only using an ssh identity key
• Public ssh service uses /etc/ssh/external_sshd_config
  • Purpose is to listen only of the public IP address and only allow userid of requesting user to gain ssh access.