Setting the log level to INFO currently gives a lot of messages like
machine-5: 23:57:27 INFO juju.agent API server address details [["10.xxx.yyy.62:17070" "127.0.0.1:17070"] ["10.xxx.yyy.56:17070" "127.0.0.1:17070"] ["10.xxx.yyy.113:17070" "127.0.0.1:17070"]] written to agent config as ["10.xxx.yyy.62:17070" "10.xxx.yyy.56:17070" "10.xxx.yyy.113:17070"]
machine-2: 23:57:27 INFO juju.agent API server address details [["10.xxx.yyy.62:17070" "127.0.0.1:17070"] ["10.xxx.yyy.56:17070" "127.0.0.1:17070"] ["10.xxx.yyy.113:17070" "127.0.0.1:17070"]] written to agent config as ["10.xxx.yyy.62:17070" "10.xxx.yyy.56:17070" "10.xxx.yyy.113:17070"]
machine-1: 23:57:27 INFO juju.agent API server address details [["10.xxx.yyy.62:17070" "127.0.0.1:17070"] ["10.xxx.yyy.56:17070" "127.0.0.1:17070"] ["10.xxx.yyy.113:17070" "127.0.0.1:17070"]] written to agent config as ["10.xxx.yyy.62:17070" "10.xxx.yyy.56:17070" "10.xxx.yyy.113:17070"]
unit-juju-introspection-0: 23:57:29 INFO juju.agent API server address details [["10.xxx.yyy.62:17070" "127.0.0.1:17070"] ["10.xxx.yyy.56:17070" "127.0.0.1:17070"] ["10.xxx.yyy.113:17070" "127.0.0.1:17070"]] written to agent config as ["10.xxx.yyy.62:17070" "10.xxx.yyy.56:17070" "10.xxx.yyy.113:17070"]
machine-1: 23:57:31 INFO juju.apiserver.uniter geting network config for machine "78/lxd/0" with addresses [static address "10.xxx.yyy.155" of device "eth0" on machine "78/lxd/0"], hosting unit "rabbitmq-server/0" of application "rabbitmq-server", with bindings map[nrpe-external-master:admin amqp:admin :admin ha:admin ceph:admin cluster:admin]
machine-1: 23:57:31 INFO juju.apiserver.uniter geting network config for machine "79/lxd/0" with addresses [static address "10.xxx.yyy.163" of device "eth0" on machine "79/lxd/0"], hosting unit "rabbitmq-server/1" of application "rabbitmq-server", with bindings map[amqp:admin :admin ha:admin ceph:admin cluster:admin nrpe-external-master:admin]
machine-1: 23:57:31 INFO juju.apiserver.uniter geting network config for machine "258" with addresses [static address "10.xxx.zzz.246" of device "bond0" on machine "258" loopback address "127.0.0.1" of device "lo" on machine "258" static address "192.168.128.223" of device "bond1" on machine "258"], hosting unit "nova-compute-kvm/145" of application "nova-compute-kvm", with bindings map[lxd:admin ephemeral-backend:admin pgsql-db:admin :admin cloud-compute:admin ceph-access:admin image-service:admin internal:admin shared-db:admin nova-ceilometer:admin neutron-plugin:admin compute-peer:admin nrpe-external-master:admin ceph:admin amqp:admin nova-designate:admin zeromq-configuration:admin]
machine-1: 23:57:32 INFO juju.apiserver.uniter geting network config for machine "222" with addresses [static address "10.xxx.zzz.212" of device "bond0" on machine "222" loopback address "127.0.0.1" of device "lo" on machine "222" static address "192.168.128.192" of device "bond1" on machine "222"], hosting unit "nova-compute-kvm/109" of application "nova-compute-kvm", with bindings map[nova-ceilometer:admin neutron-plugin:admin ceph-access:admin compute-peer:admin shared-db:admin amqp:admin nova-designate:admin :admin ceph:admin image-service:admin lxd:admin ephemeral-backend:admin cloud-compute:admin internal:admin nrpe-external-master:admin zeromq-configuration:admin pgsql-db:admin]
machine-1: 23:57:32 INFO juju.apiserver.uniter geting network config for machine "231" with addresses [static address "10.xxx.zzz.240" of device "bond0" on machine "231" loopback address "127.0.0.1" of device "lo" on machine "231" static address "192.168.128.177" of device "bond1" on machine "231"], hosting unit "nova-compute-kvm/118" of application "nova-compute-kvm", with bindings map[ephemeral-backend:admin cloud-compute:admin neutron-plugin:admin compute-peer:admin :admin ceph:admin lxd:admin nrpe-external-master:admin shared-db:admin amqp:admin nova-designate:admin zeromq-configuration:admin ceph-access:admin image-service:admin pgsql-db:admin nova-ceilometer:admin internal:admin]
These are overly verbose for "INFO" level logging.
For 2.2-rc3, I made this DEBUG.
Any work to improve the format can be done for 2.3