Comment 2 for bug 1835823

Hmm, indeed. The "prometheus" application (prometheus2 charm) in the bundle does not even have the "internal" endpoint in its metadata yaml - there are a lot of endpoints that are related to nova-compute-kvm's metadata.yaml file.

Based on what I see it looks like a Juju bug. There were 6 nova-compute-kvm units but only 5 placement directives were specified in the bundle. While Juju reported that it will add a new machine for the 6th unit ("add unit nova-compute-kvm/5 to new machine 13") it actually used machine 3 which is allocated to prometheus.

nova-compute-kvm/5 waiting allocating 3 waiting for machine

prometheus/0 waiting allocating 3 waiting for machine

From the bundle:

variables:
  oam-space: &oam-space oam-space
  internal-space: &internal-space internal-space

machines: # see https://oil-jenkins.canonical.com/artifacts/808239c1-7b06-4281-9267-0f09421604a1/config/config/bundle.yaml
# ...

applications:
# ...

# 6 units, 5 machines which is is a bundle problem but either way Juju should have caught it
  nova-compute-kvm:
    charm: cs:nova-compute
    num_units: 6
    bindings:
      "": *oam-space
      internal: *internal-space
# ...
    to:
    - 1000
    - 1001
    - 1002
    - 1003
    - 1004

  prometheus:
    charm: cs:prometheus2
    series: bionic
    bindings:
      "": *oam-space
    num_units: 1
    to:
    - 9

Deployment-time messages:

19:54:03 DEBUG juju.cmd.juju.application bundle.go:838 created new machine 6 for holding ceph-mon, ceph-osd, ceph-radosgw, cinder, glance, heat, keystone, mysql, nova-compute-kvm and openstack-service-checks units

19:54:03 DEBUG juju.cmd.juju.application bundle.go:838 created new machine 7 for holding ceph-mon, ceph-osd, ceph-radosgw, cinder, designate-bind, glance, heat, keystone, mysql, nova-compute-kvm and prometheus-ceph-exporter units

19:54:04 DEBUG juju.cmd.juju.application bundle.go:838 created new machine 8 for holding ceph-mon, ceph-osd, ceph-radosgw, cinder, designate-bind, glance, heat, keystone, mysql, nova-compute-kvm and prometheus-openstack-exporter units

19:54:04 DEBUG juju.cmd.juju.application bundle.go:838 created new machine 9 for holding aodh, ceilometer, ceph-osd, designate, gnocchi, neutron-api, nova-cloud-controller, nova-compute-kvm, openstack-dashboard and rabbitmq-server units

19:54:04 DEBUG juju.cmd.juju.application bundle.go:838 created new machine 10 for holding ceph-osd and nova-compute-kvm units

19:54:34 - add unit nova-compute-kvm/0 to new machine 6

19:54:34 DEBUG juju.cmd.juju.application bundle.go:921 added nova-compute-kvm/0 unit to new machine
- add unit nova-compute-kvm/1 to new machine 7

19:54:35 DEBUG juju.cmd.juju.application - add unit nova-compute-kvm/2 to new machine 8
bundle.go:921 added nova-compute-kvm/1 unit to new machine

- add unit nova-compute-kvm/3 to new machine 9
19:54:35 DEBUG juju.cmd.juju.application bundle.go:921 added nova-compute-kvm/2 unit to new machine

- add unit nova-compute-kvm/4 to new machine 10
19:54:36 DEBUG juju.cmd.juju.application bundle.go:921 added nova-compute-kvm/3 unit to new machine

- add unit nova-compute-kvm/5 to new machine 13
19:54:36 DEBUG juju.cmd.juju.application bundle.go:921 added nova-compute-kvm/4 unit to new machine

19:54:34 - add unit nova-compute-kvm/0 to new machine 6

19:54:34 DEBUG juju.cmd.juju.application bundle.go:921 added nova-compute-kvm/0 unit to new machine
- add unit nova-compute-kvm/1 to new machine 7