nova resize "Host key verification failed"

1.执行下面命令允许nova用户切换;

# usermod -s /bin/bash nova

# su - nova

# mkdir -p .ssh && cd .ssh

2.设置ssh的config文件

$ cat > config <<EOF
Host *
StrictHostKeyChecking no
UserKnownHostsFile=/dev/null
EOF
以上2步需要在每台host执行;3. 生成并分发ssh公钥

选择一台host,

$ ssh-keygen -f id_rsa -b 1024 -P ""

$ mv /var/lib/nova/.ssh/id_rsa.pub /var/lib/nova/.ssh/authorized_keys

将id_rsa和authorized_keys两个文件复制到其他计算节点，以下使用root操作：

$ scp /var/lib/nova/.ssh/id_rsa root@otherHost:/var/lib/nova/.ssh/id_rsa

$ scp /var/lib/nova/.ssh/authorized_keys root@otherHost:/var/lib/nova/.ssh/authorized_keys

4. 设置文件属性

root登录到其他计算节点，执行：

# chown nova:nova /var/lib/nova/.ssh/id_rsa /var/lib/nova/.ssh/authorized_keys