I am trying 1.18.0 alpha 3 release and creating instances:

Bad request with: [POST https://exxx.13774/v2.1/servers], error message: {"badRequest": {"message": "Invalid input for field/attribute metadata. Value: {u'kopsGroupName': u'master-zone-3-1', u'k8s': u'clusterospr-0502de.k8s.local', u'KopsRole': u'Master', u'k8s.io/cluster-autoscaler/node-template/label/kops.k8s.io/instancegroup': u'master-zone-3-1', u'cluster_generation': u'0', u'k8s.io/role/master': u'1', u'ig_generation': u'0', u'kops.k8s.io/instancegroup': u'master-zone-3-1', u'KubernetesCluster': u'clusterospr-0502de.k8s.local', u'KopsInstanceGroup': u'master-zone-3-1', u'KopsNetwork': u'clusterospr-0502de.k8s.local'}. u'k8s.io/cluster-autoscaler/node-template/label/kops.k8s.io/instancegroup', u'k8s.io/role/master', u'kops.k8s.io/instancegroup' do not match any of the regexes: '^[a-zA-Z0-9-_:. ]{1,255}$'", "code": 400}}

cc @mitch000001 that PR that you made broke this..

and this is now backported to all releases

problem PRs
#8999
#9001
#9013

It is impossible to use any latest kops version with openstack

versions affected:
v1.18.0-alpha.3
v1.17.0-beta.2
v1.16.2

/kind bug
/priority critical-urgent