python 版本问题，导致ansibl

[root@ansible-server ~]# ansible mongodb -m copy -a "src=/etc/yum.repos.d/mongodb-org-3.2.repo dest=/etc/yum.repos.d/"
SSH password: 
10.8.21.9 | success >> {
    "changed": false, 
    "checksum": "41b65edf420e087a9f8c66993338251f87008fba", 
    "dest": "/etc/yum.repos.d/mongodb-org-3.2.repo", 
    "gid": 0, 
    "group": "root", 
    "mode": "0644", 
    "owner": "root", 
    "path": "/etc/yum.repos.d/mongodb-org-3.2.repo", 
    "size": 143, 
    "state": "file", 
    "uid": 0
}
10.8.21.12 | success >> {
    "changed": false, 
    "checksum": "41b65edf420e087a9f8c66993338251f87008fba", 
    "dest": "/etc/yum.repos.d/mongodb-org-3.2.repo", 
    "gid": 0, 
    "group": "root", 
    "mode": "0644", 
    "owner": "root", 
    "path": "/etc/yum.repos.d/mongodb-org-3.2.repo", 
    "size": 143, 
    "state": "file", 
    "uid": 0
}
10.8.21.8 | FAILED >> {
    "checksum": "41b65edf420e087a9f8c66993338251f87008fba", 
    "failed": true, 
    "msg": "Error: ansible requires the stdlib json or simplejson module, neither was found!"
}
10.8.21.11 | success >> {
    "changed": false, 
    "checksum": "41b65edf420e087a9f8c66993338251f87008fba", 
    "dest": "/etc/yum.repos.d/mongodb-org-3.2.repo", 
    "gid": 0, 
    "group": "root", 
    "mode": "0644", 
    "owner": "root", 
    "path": "/etc/yum.repos.d/mongodb-org-3.2.repo", 
    "size": 143, 
    "state": "file", 
    "uid": 0
}