1. Create a user (msmuser) for LSI MSM login
# adduser --shell /usr/sbin/nologin --gid 0 --no-create-home msmuser
2. Due to Mirantis OpenStack default root can't login for using password, and only use key pair. For system security, we configure a account/password to SSH login only.
# vim /etc/ssh/sshd_config
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Match User msmuser
PasswordAuthentication yes
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OR
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Match Group msmuser
PasswordAuthentication yes
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3. Restart service
# /etc/init.d/ssh restart
Reference: http://serverfault.com/questions/238711/force-ssh-public-key-authentication-for-specific-users