Error executing image transfer script while following onedploy tutorial

[juansebastiani2cat]

I'm following the tutorial from https://docs.opennebula.io/7.0/software/installation_process/automatic_installation_with_onedeploy/one_deploy_tutorial_local_ds/#one-deploy-local

I have one front-end and two hipervisors and my example.yml file is the following:

# example.yml
---
all:
  vars:
    ansible_user: root
    ansible_private_key_file: /home/ubuntu/.ssh/id_ed25519
    ansible_python_interpreter: /usr/bin/python3
    one_version: '7.0'
    one_pass: opennebulapass
    ansible_remote_tmp: /tmp/ansible-tmp
    
    vn:
      admin_net:
        managed: true
        template:
          VN_MAD: 802.1Q
          PHYDEV: enp75s0f2        # ensure this exists on the nodes; otherwise use ens*, enp* etc.
          BRIDGE: br1091
          VLAN_ID: 1091
          AR:
            TYPE: IP4
            IP: 172.30.0.100
            SIZE: 48
          NETWORK_ADDRESS: 172.30.0.0
          NETWORK_MASK: 255.255.255.0
          GATEWAY: 172.30.0.1
          DNS: 1.1.1.1

frontend:
  hosts:
    f1:
      ansible_host: 192.168.123.47    # keep it if you like, not used by local
      ansible_connection: local
      ansible_python_interpreter: /usr/bin/python3

node:
  hosts:
    n1: { ansible_host: 172.27.13.247 }
    n2: { ansible_host: 172.27.13.246 }

and my ansible.cfg is the following:

[defaults]
inventory=./example.yml
gathering=explicit
host_key_checking=false
display_skipped_hosts=true
retry_files_enabled=false
any_errors_fatal=true
stdout_callback=yaml
timeout=30
collections_paths=/home/ubuntu/one-deploy/ansible_collections

[ssh_connection]
pipelining=true
ssh_args=-q -o ControlMaster=auto -o ControlPersist=60s

[privilege_escalation]
become      = true
become_user = root

After executing the ansible-playbook of the main, I get that there is connectivity between the front-end and the hipervisors:
PLAY RECAP

---

f1 : ok=75 changed=0 unreachable=0 failed=0 skipped=85 rescued=0 ignored=0
n1 : ok=37 changed=0 unreachable=0 failed=0 skipped=66 rescued=0 ignored=0
n2 : ok=36 changed=0 unreachable=0 failed=0 skipped=57 rescued=0 ignored=0

But when I try to download a new image:
onemarketapp export -d default 'Alpine Linux 3.17' alpine

I get the following error:

Error executing image transfer script: copying opennebula-frontend:/var/lib/one/datastores/1/bfe4ce8... see more details in VM log

I have checked the connectivity between the front-end and the hipervisors and they seem to be ok. I can ssh from the front-end to each hipervisor passwordless correctly. I tried accessing the VM logs but they just don't seem to exist:

oneadmin@opennebula-frontend:~$ onevm list
  ID USER     GROUP    NAME                                                 STAT  CPU     MEM HOST                                     TIME
   5 oneadmin oneadmin alpine-5                                             fail    1    128M 172.27.13.246                        0d 00h22
   4 oneadmin oneadmin alpine-4                                             fail    1    128M 172.27.13.247                        0d 00h29

oneadmin@opennebula-frontend:/var/log/one$ cat 5.log 
Mon Sep 29 13:47:51 2025 [Z0][VM][I]: New state is ACTIVE
Mon Sep 29 13:47:51 2025 [Z0][VM][I]: New LCM state is PROLOG
Mon Sep 29 13:47:53 2025 [Z0][TrM][I]: Command execution failed (exit code: 2): /var/lib/one/remotes/tm/local/clone opennebula-frontend:/var/lib/one//datastores/1/bfe4ce81b1979b56bc11e455829f330f 172.27.13.246:/var/lib/one//datastores/0/5/disk.0 5 1
Mon Sep 29 13:47:53 2025 [Z0][TrM][I]: clone: Cloning /var/lib/one/datastores/1/bfe4ce81b1979b56bc11e455829f330f to /var/lib/one/datastores/0/5/disk.0
Mon Sep 29 13:47:53 2025 [Z0][TrM][I]: copying opennebula-frontend:/var/lib/one/datastores/1/bfe4ce81b1979b56bc11e455829f330f to 172.27.13.246:/var/lib/one/datastores/0/5/disk.0 from 172.27.13.246 (format: qcow2)
Mon Sep 29 13:47:53 2025 [Z0][TrM][E]: clone: copying opennebula-frontend:/var/lib/one/datastores/1/bfe4ce81b1979b56bc11e455829f330f to 172.27.13.246:/var/lib/one/datastores/0/5/disk.0 from 172.27.13.246 (format: qcow2)
Mon Sep 29 13:47:53 2025 [Z0][TrM][E]: clone:   [STDOUT] "~/datastores/0/5 ~\n"
\ntar: This does not look like a tar archive\ntar: Exiting with failure status due to previous errors\n"ntend: Name or service not known
Mon Sep 29 13:47:53 2025 [Z0][TrM][E]: Error executing image transfer script: copying opennebula-frontend:/var/lib/one/datastores/1/bfe4ce81b1979b56bc11e455829f330f to 172.27.13.246:/var/lib/one/datastores/0/5/disk.0 from 172.27.13.246 (format: qcow2)
Mon Sep 29 13:47:53 2025 [Z0][VM][I]: New LCM state is PROLOG_FAILURE

Could you give me a hand with this please ? Thanks a lot for your support.

[sk4zuzu]

Hi @juansebastiani2cat sorry for delay on this, we merged #152 which is just to prevent situation you experienced. This is not strictly one-deploy issue, it's how OpenNebula core works internally, it needs working DNS. So on a small scale if you don't preconfigure hostnames and don't have local DNS infrastructure it's possible to configure this in one-deploy:

all:
  vars:
    ensure_hosts: true
    ensure_hostname: true

which auto-populates /etc/hosts and hostnames using data from the inventory, it may be not ideal for you idk, but at least it can be considered a workaround for non-production environments (I guess). 🤔