离线包下载之后，放到服务器然后安装就报错，
Prerequisites:
1. It's recommended that Your OS is clean (without any other software installed), otherwise there may be conflicts.
2. OS requirements (For Minimal Installation only)：at least 2 vCPUs and 4GB RAM.
3. Please make sure the storage service is available if you've configured storage parameters in the conf directory.
4. Make sure the DNS address in /etc/resolv.conf is available.
5. If your network configuration uses an firewall，you must ensure infrastructure components can communicate with each other through specific ports.
It's recommended that you turn off the firewall or follow the link configuriation:
https://github.com/kubesphere/ks-installer/blob/master/docs/NetWorkAccess.md
Please ensure that your environment has met the above requirements (yes/no) yes
umount: /kubeinstaller/yum_repo/iso: mountpoint not found
Not find software dependency package, Please see the support list and download path in the following url !
https://kubesphere.io/forum/d/230
Traceback (most recent call last):
File "os/precheck.py", line 4, in <module>
import yaml, os
ImportError: No module named yaml
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1. Initiating Environment
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./install.sh:行241: ansible-playbook: 未找到命令
failed!
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please refer to https://kubesphere.io/docs/v2.1/zh-CN/faq/faq-install/
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[root@jysp scripts]#
Connection closed by foreign host.
Disconnected from remote host(192.168.100.119) at 11:27:20.
Type `help' to learn how to use Xshell prompt.
