Comment 2 for bug 1831580

127.0.1.1 is from ingress-addresses like below.
I haven't analyzed further but what code set ingress-addresses?

I think it is NetworksForRelation func in state/relationunit.go

analyzing further...

juju run --unit etcd/2 "network-get --format yaml db"
bind-addresses:
- macaddress: ""
  interfacename: ""
  addresses:
  - hostname: node-04.maas
    address: 127.0.1.1
    cidr: ""
egress-subnets:
- 10.0.0.6/32
ingress-addresses:
- 127.0.1.1