install ceph by ceph-deploy
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1、在每台ceph节点上都生成一个ceph-deploy用户，密码也为ceph-deply
sudo useradd -d /home/ceph-deploy -m ceph-deploy
passwd ceph-deploy
(ceph-deploy)
echo "ceph-deploy ALL = (root) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/ceph-deploy
sudo chmod 0440 /etc/sudoers.d/ceph-deploy
2、在其中一台节点上生成ssh key，并将ssh key 拷贝至其余ceph节点
su ceph-deploy
ssh-keygen 一路回车
ssh-copy-id [email protected]
ssh-copy-id [email protected]
ssh-copy-id [email protected]
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