Addresses 1031 - Update configure-network.sh

[ehsjoar]

This is to address situations where we don't get any network data but still want to set the hostaname (e.g. in the case of Sylva). This MR fixes #1031

[e-minguez]

So if there is no metadata the script just finishes? Shouldn't it continue instead?

If it should exit, then the message should be something like "No meta_data.json found, exiting" because otherwise it seems it continues.

[hardys]

There are certain fields which are always set in the meta-data, even though the user-provided metaData in the BMH spec is optional:

https://github.com/metal3-io/baremetal-operator/blob/main/pkg/provisioner/ironic/ironic.go#L1209

So I think the exit here is OK, although it would also be fine if we just moved the subsequent lines into an else.

[e-minguez]

What I'm saying is to check if metadata exists, if it does, set hostname, if it doesn't, continue getting the network data, something like:

META_DATA_FILE="/mnt/openstack/latest/meta_data.json"
if [ -f "${META_DATA_FILE}" ]; then
  DESIRED_HOSTNAME=$(cat /mnt/openstack/latest/meta_data.json | tr ',{}' '\n' | grep '"metal3-name"' | sed 's/.*\"metal3-name\": \"\(.*\)\"/\1/')
  echo "${DESIRED_HOSTNAME}" > /etc/hostname
else
  umount /mnt
  echo "No meta_data.json found, skipping hostname configuration"
fi

Why unmounting /mnt though?

[e-minguez]

Same here