之前用ansible一直用的root身份、机器之间又早早的做好了ssh信任、所以一直也没有出现什么问题。今天想想自己不能这么浪了，还是用回普通用户吧；
然而马上就遇到了第一个问题，ansible提示安装sshpass这个软件包。
一、ansible提示安装sshpass这个软件包：
ansible workstudio -m ping
workstudio | FAILED! => {
"failed": true,
"msg": "to use the 'ssh' connection type with passwords, you must install the sshpass program"
}
二、安装sshpass ：
yum -y install sshpass
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* epel: mirrors.ustc.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package sshpass.x86_64 :1.06-.el7 will be installed
--> Finished Dependency Resolution Dependencies Resolved ==============================================================================================================================
Package Arch Version Repository Size
==============================================================================================================================
Installing:
sshpass x86_64 1.06-.el7 epel k Transaction Summary
==============================================================================================================================
Install Package Total download size: k
Installed size: k
Downloading packages:
warning: /var/cache/yum/x86_64//epel/packages/sshpass-1.06-.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY
Public key for sshpass-1.06-.el7.x86_64.rpm is not installed
sshpass-1.06-.el7.x86_64.rpm | kB ::
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
Importing GPG key 0x352C64E5:
Userid : "Fedora EPEL (7) <epel@fedoraproject.org>"
Fingerprint: 91e9 7d7c 4a5e 96f1 7f3e 888f 6a2f aea2 352c 64e5
Package : epel-release--.noarch (installed)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : sshpass-1.06-.el7.x86_64 /
Verifying : sshpass-1.06-.el7.x86_64 / Installed:
sshpass.x86_64 :1.06-.el7 Complete!
三、注意sshpass这个包并不在系统光盘里面，它是epel这人源中包涵的包
四、测试ansible是否可用了：
ansible workstudio -m ping
workstudio | SUCCESS => {
"changed": false,
"ping": "pong"
}
五、什么情况会出现要求安装sshpass:
如果在/etc/ansible/host 中配置的ssh登录用户使用的是密钥的认证是不会出现这个问题的；也就是说
1、在运行ansible的主机上要与被控机建立ssh信任。
2、在/etc/ansible/host文件中不要指ansible_ssh_pass这个变量，不然它就强制走密码认证了，而不是密钥。
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