PLAY [group1] *****************************************************************
GATHERING FACTS ***************************************************************
<172.17.251.236> ESTABLISH CONNECTION FOR USER: user1
<172.17.251.236> REMOTE_MODULE setup
<172.17.251.236> EXEC ssh -C -tt -vvv -o ControlMaster=auto -o ControlPersist=60s -o ControlPath="/root/.ansible/cp/ansible-ssh-%h-%p-%r" -o Port=22 -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=user1 -o ConnectTimeout=10 172.17.251.236 /bin/sh -c 'mkdir -p $HOME/.ansible/tmp/ansible-tmp-1444203780.43-167481022998325 && chmod a+rx $HOME/.ansible/tmp/ansible-tmp-1444203780.43-167481022998325 && echo $HOME/.ansible/tmp/ansible-tmp-1444203780.43-167481022998325'
fatal: [172.17.251.236] => SSH Error: Permission denied (publickey,password).
It is sometimes useful to re-run the command using -vvvv, which prints SSH debug output to help diagnose the issue.
TASK: [ensure update] *********************************************************
FATAL: no hosts matched or all hosts have already failed -- aborting
PLAY RECAP ********************************************************************
to retry, use: --limit @/root/test1.retry
172.17.251.236 : ok=0 changed=0 unreachable=1 failed=0