出现以下报错先检查/etc/hosts查看ip是否有变更：
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"msg": "Failed to connect to the host via ssh: ssh: connect to host s-nginx-3 port 22: Connection timed out",
出现以下报错先检查/root/.ssh/known_hosts删除nginx-2的相关rsa的信息即可.
nginx-2 | UNREACHABLE! => {
"changed": false,
"msg": "Failed to connect to the host via ssh: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r\n@ \nIT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!\r\nSomeone could be eavesdropping on you right now (man-in-th by the remote host is\nSHA256:mLGTRAdsoC/plMuoawCaV6gCJipekSikSi6mB5j85ME.\r\nPlease contact your system administratown_hosts:12\r\nECDSA host key for nginx-2 has changed and you have requested strict checking.\r\nHost key verif
"unreachable": true
}
vim ~/.ssh/known_hosts
当前名称：Ansible报错的解决方法
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