D4Science Infrastructure

I'm trying to update GRSF in dev with the following command:

./run.sh smartgears-node-upgrade.yml -i inventory/hosts.dev -l smart_grsf_dev

and I obtain the followign ansible error:

TASK [disable nagios alerts for this host services] **************************************************
failed: [smart-grsf-d-d4s.d4science.org] (item=monitoring.research-infrastructures.eu) => {"item": "monitoring.research-infrastructures.eu", "msg": "SSH Error: data could not be sent to remote host \"monitoring.research-infrastructures.eu\". Make sure this host can be reached over ssh", "unreachable": true}
fatal: [smart-grsf-d-d4s.d4science.org]: UNREACHABLE! => {"changed": false, "msg": "All items completed", "results": [{"_ansible_ignore_errors": null, "_ansible_item_result": true, "item": "monitoring.research-infrastructures.eu", "msg": "SSH Error: data could not be sent to remote host \"monitoring.research-infrastructures.eu\". Make sure this host can be reached over ssh", "unreachable": true}]}
    to retry, use: --limit @/home/lucafrosini/workspace/ANSIBLE/ansible-playbooks/d4science-ghn-cluster/smartgears-node-upgrade.retryPLAY RECAP *******************************************************************************************
smart-grsf-d-d4s.d4science.org : ok=1    changed=0    unreachable=1    failed=0