DHCPd on Ubuntu validation fails

Calling host: las126.las.kit.edu (Fedora 27)

Failing nodes: las93

Summary

The validation of the DHCPd config fails on Ubuntu (Lab computer). There is at least one person experiencing the same issue, https://superuser.com/questions/1286948/ansible-template-validation-fails-on-isc-dhcp-server , but no answer so far.

The file is not copied and the task aborts.

Steps to reproduce

Run the lab role with validate: "{{ bin_path }} -t -cf %s" activated.

What is the current bug behavior?

The role fails and the files host-list-maglab and dhcpd.conf are not copied to the node.

What is the expected correct behaviour?

The task succeeds and the dhcpd.conf and the decrypted host-list-maglab file are at the node.

Relevant logs and/or screenshots

failed: [las93.las.kit.edu] (item=maglab.hosts) => {"changed": false, "checksum": "6ba7f7faa00e05e763266888a31054cc20a58909", "exit_status": 1, "item": "maglab.hosts", "msg": "failed to validate", "stderr": "Internet Systems Consortium DHCP Server 4.2.4\nCopyright 2004-2012 Internet Systems Consortium.\nAll rights reserved.\nFor info, please visit https://www.isc.org/software/dhcp/\nCan't open /root/.ansible/tmp/ansible-tmp-1528358315.88-158600528943595/source: Permission denied\n", "stderr_lines": ["Internet Systems Consortium DHCP Server 4.2.4", "Copyright 2004-2012 Internet Systems Consortium.", "All rights reserved.", "For info, please visit https://www.isc.org/software/dhcp/", "Can't open /root/.ansible/tmp/ansible-tmp-1528358315.88-158600528943595/source: Permission denied"], "stdout": "", "stdout_lines": []}                                                                                                                
failed: [las93.las.kit.edu] (item=dhcpd.conf) => {"changed": false, "checksum": "c8f8782d9486025107e622108f35cbea7f6da629", "exit_status": 1, "item": "dhcpd.conf", "msg": "failed to validate", "stderr": "Internet Systems Consortium DHCP Server 4.2.4\nCopyright 2004-2012 Internet Systems Consortium.\nAll rights reserved.\nFor info, please visit https://www.isc.org/software/dhcp/\nCan't open /root/.ansible/tmp/ansible-tmp-1528358317.34-230984934434610/source: Permission denied\n", "stderr_lines": ["Internet Systems Consortium DHCP Server 4.2.4", "Copyright 2004-2012 Internet Systems Consortium.", "All rights reserved.", "For info, please visit https://www.isc.org/software/dhcp/", "Can't open /root/.ansible/tmp/ansible-tmp-1528358317.34-230984934434610/source: Permission denied"], "stdout": "", "stdout_lines": []}     

Possible fixes

Work around: Check the validity at your own host and don't use the validity check on the node.

/cc @gethmann