kubespary: ansible не может отправить данные с помощью ssh узлу в команде ansible-playbook

Question

в шаге 10 учебного пособия https://dzone.com/articles/kubespray-10-simple-steps-for-installing-a-product для развертывания готового к работе кластера kubernetes с помощью kubespray, при запуске ansible-playbook command.error произошла ошибка: ОШИБКА!Ошибка SSH: данные не могут быть отправлены на удаленный хост.Убедитесь, что этот хост доступен через ssh

ssh без пароля активен между узлами, и я могу запускать ssh с каждого узла без пароля.Может кто-нибудь мне помочь?спасибо, это моя команда, и это вывод:

master-node@master-node:~/kubespray$ sudo ansible all -i inventory/mycluster/hosts.ini -m ping -vvv
ansible 2.7.8


config file = /home/master-node/kubespray/ansible.cfg
  configured module search path = [u'/home/master-node/kubespray/library']
  ansible python module location = /usr/local/lib/python2.7/dist-packages/ansible
  executable location = /usr/local/bin/ansible
  python version = 2.7.12 (default, Nov 12 2018, 14:36:49) [GCC 5.4.0 20160609]
Using /home/master-node/kubespray/ansible.cfg as config file
/home/master-node/kubespray/inventory/mycluster/hosts.ini did not meet host_list requirements, check plugin documentation if this is unexpected
/home/master-node/kubespray/inventory/mycluster/hosts.ini did not meet script requirements, check plugin documentation if this is unexpected
/home/master-node/kubespray/inventory/mycluster/hosts.ini did not meet yaml requirements, check plugin documentation if this is unexpected
Parsed /home/master-node/kubespray/inventory/mycluster/hosts.ini inventory source with ini plugin
META: ran handlers
Using module file /usr/local/lib/python2.7/dist-packages/ansible/modules/system/ping.py
<192.168.1.107> ESTABLISH SSH CONNECTION FOR USER: worker-node
<192.168.1.107> SSH: EXEC ssh -o ControlMaster=auto -o ControlPersist=30m -o ConnectionAttempts=100 -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=worker-node -o ConnectTimeout=10 -o ControlPath=/home/master-node/.ansible/cp/e24ed02313 192.168.1.107 '/bin/sh -c '"'"'/usr/bin/python && sleep 0'"'"''
Using module file /usr/local/lib/python2.7/dist-packages/ansible/modules/system/ping.py
<192.168.1.142> ESTABLISH SSH CONNECTION FOR USER: master-node
<192.168.1.142> SSH: EXEC ssh -o ControlMaster=auto -o ControlPersist=30m -o ConnectionAttempts=100 -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=master-node -o ConnectTimeout=10 -o ControlPath=/home/master-node/.ansible/cp/01ac2924af 192.168.1.142 '/bin/sh -c '"'"'/usr/bin/python && sleep 0'"'"''


master-node | UNREACHABLE! => {
    "changed": false, 
    "msg": "SSH Error: data could not be sent to remote host \"192.168.1.142\". Make sure this host can be reached over ssh", 
    "unreachable": true
}
worker-node | UNREACHABLE! => {
    "changed": false, 
    "msg": "SSH Error: data could not be sent to remote host \"192.168.1.107\". Make sure this host can be reached over ssh", 
    "unreachable": true
}