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Using bootcmd in cloud-config lead to restarts prior to starting the
systemd-hostnamed, which was probable cause of the failure when DHCP
client was failing to send the hostname, and subsequently, the
ansible-opnshift was not able to identify the VM among the others when
checking DHCP leases. The failure looked like: following
10:17:31 failed: [localhost] => {"attempts": 60, "changed": true, "cmd": "virsh -c qemu:///system net-dhcp-leases openshift-ansible | egrep -c 'experiment-node-compute-453d0|experiment-node-compute-61e16'", "delta": "0:00:00.033061", "end": "2015-10-19 10:17:31.409434", "failed": true, "rc": 0, "start": "2015-10-19 10:17:31.376373", "warnings": []}
10:17:31 stdout: 1
10:17:31 msg: Task failed as maximum retries was encountered
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According to https://libvirt.org/formatdomain.html#elementsMetadata , the `metadata` tag can contain only one top-level element per namespace.
Because of that, libvirt stored only the `deployment-type-{{ deployment_type }}` tag.
As a consequence, the dynamic inventory reported no `env-{{ cluster }}` group.
This is problematic for the `terminate.yml` playbook which iterates over `groups['tag-env-{{ cluster-id }}]`
The symptom is that `oo_hosts_to_terminate` was not defined.
In the end, as Ansible couldn’t iterate on the value of `groups['oo_hosts_to_terminate']`, it iterated on its letters:
```
TASK: [Destroy VMs] ***********************************************************
failed: [localhost] => (item=['g', 'destroy']) => {"failed": true, "item": ["g", "destroy"]}
msg: virtual machine g not found
failed: [localhost] => (item=['g', 'undefine']) => {"failed": true, "item": ["g", "undefine"]}
msg: virtual machine g not found
failed: [localhost] => (item=['r', 'destroy']) => {"failed": true, "item": ["r", "destroy"]}
msg: virtual machine r not found
failed: [localhost] => (item=['r', 'undefine']) => {"failed": true, "item": ["r", "undefine"]}
msg: virtual machine r not found
failed: [localhost] => (item=['o', 'destroy']) => {"failed": true, "item": ["o", "destroy"]}
msg: virtual machine o not found
failed: [localhost] => (item=['o', 'undefine']) => {"failed": true, "item": ["o", "undefine"]}
msg: virtual machine o not found
failed: [localhost] => (item=['u', 'destroy']) => {"failed": true, "item": ["u", "destroy"]}
msg: virtual machine u not found
failed: [localhost] => (item=['u', 'undefine']) => {"failed": true, "item": ["u", "undefine"]}
msg: virtual machine u not found
failed: [localhost] => (item=['p', 'destroy']) => {"failed": true, "item": ["p", "destroy"]}
msg: virtual machine p not found
failed: [localhost] => (item=['p', 'undefine']) => {"failed": true, "item": ["p", "undefine"]}
msg: virtual machine p not found
failed: [localhost] => (item=['s', 'destroy']) => {"failed": true, "item": ["s", "destroy"]}
msg: virtual machine s not found
failed: [localhost] => (item=['s', 'undefine']) => {"failed": true, "item": ["s", "undefine"]}
msg: virtual machine s not found
failed: [localhost] => (item=['[', 'destroy']) => {"failed": true, "item": ["[", "destroy"]}
msg: virtual machine [ not found
failed: [localhost] => (item=['[', 'undefine']) => {"failed": true, "item": ["[", "undefine"]}
msg: virtual machine [ not found
failed: [localhost] => (item=["'", 'destroy']) => {"failed": true, "item": ["'", "destroy"]}
msg: virtual machine ' not found
failed: [localhost] => (item=["'", 'undefine']) => {"failed": true, "item": ["'", "undefine"]}
msg: virtual machine ' not found
failed: [localhost] => (item=['o', 'destroy']) => {"failed": true, "item": ["o", "destroy"]}
msg: virtual machine o not found
failed: [localhost] => (item=['o', 'undefine']) => {"failed": true, "item": ["o", "undefine"]}
msg: virtual machine o not found
etc…
```
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