Password less ssh for root user from compute node to all cell nodes

 Password less ssh for root user from compute node to all cell nodes:

Instead of copying the public key from the compute nodes to the autorizedkeys file of all the cell nodes; below command can be used for password less ssh for root user from the compute nodes to all the cell nodes.

Where /opt/oracle.SupportTools/onecommand/cell_group is the file where list of cellnodes is present.

#dcli -g /opt/oracle.SupportTools/onecommand/cell_group -l root -k -s '-o StrictHostKeyChecking=no'  

(Assuming ssh key is already present if not then run command #ssh-keygen -t rsa  )

To Verify password less is happening for all cells using uptime command.

#dcli -g /opt/oracle.SupportTools/onecommand/cell_group -l root uptime

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[root@dbadm01 onecommand]# dcli -g /opt/oracle.SupportTools/onecommand/cell_group -l root -k -s '-o StrictHostKeyChecking=no'

root@celadm01's password:

root@celadm02's password:

celadm01: ssh key added

celadm02: ssh key added

[root@dbadm01 onecommand]#

[root@dbadm01 onecommand]# dcli -g /opt/oracle.SupportTools/onecommand/cell_group -l root uptime

hcprd2celadm01: 12:57:01 up 165 days, 20:52,  0 users,  load average: 1.35, 1.91, 1.92

hcprd2celadm02: 12:57:01 up 165 days, 12:49,  0 users,  load average: 2.91, 2.15, 1.97

[root@dbadm01 onecommand]#

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Password less ssh for root user from compute node to all compute nodes:

Where /opt/oracle.SupportTools/onecommand/dbs_group is the file where list of compute nodes mentioned.

#dcli -g /opt/oracle.SupportTools/onecommand/dbs_group -l root -k -s '-o StrictHostKeyChecking=no'

#dcli -g /opt/oracle.SupportTools/onecommand/dbs_group -l root uptime

Regards,

Kiran Jadhav