/var/lib/jenkins/.ssh/known_hosts [SSH] No Known Hosts file was found at /var/lib/jenkins/.ssh/known_hosts. Please ensure one is created at this path and that Jenkins can read it.
/var/lib/jenkins/.ssh/known_hosts 存了是已经接受SSH key认证的目标节点，由于创建节点时这个Host Key Verification Strategy 校验策略默认设置的是只链接已知Host，于是对未知的Host直接报错了，开启不验证等连接上再切回这个策略就可以解决