ubuntu18.04环境下， Kubernetes 安装CRI-O，无法启动的问题

1、问题

• Kubernetes 官网教程安装CRI-O，执行 systemctl start crio 启动失败
• 环境 ubuntu 18.04

2、错误信息

crio.service - Container Runtime Interface for OCI (CRI-O)
   Loaded: loaded (/usr/lib/systemd/system/crio.service; disabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2020-02-13 17:13:04 CST; 41s ago
     Docs: https://github.com/cri-o/cri-o
  Process: 1990 ExecStart=/usr/bin/crio $CRIO_STORAGE_OPTIONS $CRIO_NETWORK_OPTIONS $CRIO_METRICS_OPTIONS (code=e
 Main PID: 1990 (code=exited, status=1/FAILURE)

Feb 13 17:13:04 VM-0-8-ubuntu systemd[1]: Starting Container Runtime Interface for OCI (CRI-O)...
Feb 13 17:13:04 VM-0-8-ubuntu crio[1990]: time="2020-02-13 17:13:04.131725565+08:00" level=fatal msg="library con
Feb 13 17:13:04 VM-0-8-ubuntu systemd[1]: crio.service: Main process exited, code=exited, status=1/FAILURE
Feb 13 17:13:04 VM-0-8-ubuntu systemd[1]: crio.service: Failed with result 'exit-code'.
Feb 13 17:13:04 VM-0-8-ubuntu systemd[1]: Failed to start Container Runtime Interface for OCI (CRI-O).

3、解决方法

• 执行命令

$ sudo sed 's|/usr/libexec/crio/conmon|/usr/bin/conmon|' -i /etc/crio/crio.conf

• 问题分析一：
  我的系统出错的原因跟 ubuntu18.04 有关，官方的运行环境为 ubuntu16.04
  参考：https://github.com/cri-o/cri-o/issues/2903
• 问题分析二：
  最先尝试的解决访问是 参照 https://github.com/cri-o/cri-o/issues/1767 这个帖子的，但仍未解决问题，后来才怀疑是操作系统的原因。

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