ssh指定的密钥协商方式以及Ansible的hosts文件修改密钥协商方式

一、首先你要知道用什么加密协商。

[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details
10.10.2.190 | UNREACHABLE! => {"changed": false,"msg": "Failed to connect to the host via ssh: Unable to negotiate with 10.10.2.190 port 22: no matching key exchange method found. Their offer: curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256","unreachable": true
}

这里会告诉你：
Their offer: curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256"

然后你可以通过ssh先进行测试：
 

ssh -l root -o KexAlgorithms=diffie-hellman-group-exchange-sha256 10.10.2.190

-o 后根指定的协商方式

二、修改Ansible特定的hosts协商方式

[klin]
10.10.2.190 ansible_ssh_user='root' ansible_ssh_pass='Admin123@pl' ansible_ssh_args='-o KexAlgorithms=diffie-hellman-group-exchange-sha256'

在hosts文件中加上 ansible_ssh_args='-o KexAlgorithms=diffie-hellman-group-exchange-sha256'

此时Ansible的ssh命令等价于上面的ssh命令。