Comment 1 for bug 1883554

Example:

{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"nb_cfg":8760}},"_date":1592234432031,"_comment":"ovn-controller: registering chassis '3cab3e81-7cd1-45b3-b99a-4f21e626df6e'"}
{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"external_ids":["map",[["datapath-type","system"],["iface-types","erspan,geneve,gre,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan"],["is-interconn","false"],["neutron-metadata-proxy-networks",""],["neutron:liveness_check_at","2020-06-15T15:20:03.666124+00:00"],["neutron:metadata_liveness_check_at","2020-06-15T15:20:03.672324+00:00"],["neutron:ovn-metadata-id","f9240536-3953-4298-a455-dd1fdc8dd123"],["neutron:ovn-metadata-sb-cfg","8760"],["ovn-bridge-mappings","datacentre:br-ex,tenant:br-isolated"],["ovn-chassis-mac-mappings",""],["ovn-cms-options",""]]]}},"_date":1592234432034}
{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"external_ids":["map",[["datapath-type","system"],["iface-types","erspan,geneve,gre,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan"],["is-interconn","false"],["neutron-metadata-proxy-networks",""],["neutron:liveness_check_at","2020-06-15T15:20:32.062659+00:00"],["neutron:metadata_liveness_check_at","2020-06-15T15:20:03.672324+00:00"],["neutron:ovn-metadata-id","f9240536-3953-4298-a455-dd1fdc8dd123"],["neutron:ovn-metadata-sb-cfg","8760"],["ovn-bridge-mappings","datacentre:br-ex,tenant:br-isolated"],["ovn-chassis-mac-mappings",""],["ovn-cms-options",""]]]}},"_date":1592234432064}
{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"external_ids":["map",[["datapath-type","system"],["iface-types","erspan,geneve,gre,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan"],["is-interconn","false"],["neutron-metadata-proxy-networks",""],["neutron:liveness_check_at","2020-06-15T15:20:32.062659+00:00"],["neutron:metadata_liveness_check_at","2020-06-15T15:20:32.067323+00:00"],["neutron:ovn-metadata-id","f9240536-3953-4298-a455-dd1fdc8dd123"],["neutron:ovn-metadata-sb-cfg","8760"],["ovn-bridge-mappings","datacentre:br-ex,tenant:br-isolated"],["ovn-chassis-mac-mappings",""],["ovn-cms-options",""]]]}},"_date":1592234432069}
{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"external_ids":["map",[["datapath-type","system"],["iface-types","erspan,geneve,gre,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan"],["is-interconn","false"],["neutron-metadata-proxy-networks",""],["neutron:liveness_check_at","2020-06-15T15:20:33.821259+00:00"],["neutron:metadata_liveness_check_at","2020-06-15T15:20:32.067323+00:00"],["neutron:ovn-metadata-id","f9240536-3953-4298-a455-dd1fdc8dd123"],["neutron:ovn-metadata-sb-cfg","8760"],["ovn-bridge-mappings","datacentre:br-ex,tenant:br-isolated"],["ovn-chassis-mac-mappings",""],["ovn-cms-options",""]]]}},"_date":1592234433823}
{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"external_ids":["map",[["datapath-type","system"],["iface-types","erspan,geneve,gre,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan"],["is-interconn","false"],["neutron-metadata-proxy-networks",""],["neutron:liveness_check_at","2020-06-15T15:20:33.821259+00:00"],["neutron:metadata_liveness_check_at","2020-06-15T15:20:33.828736+00:00"],["neutron:ovn-metadata-id","f9240536-3953-4298-a455-dd1fdc8dd123"],["neutron:ovn-metadata-sb-cfg","8760"],["ovn-bridge-mappings","datacentre:br-ex,tenant:br-isolated"],["ovn-chassis-mac-mappings",""],["ovn-cms-options",""]]]}},"_date":1592234433831}
{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"external_ids":["map",[["datapath-type","system"],["iface-types","erspan,geneve,gre,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan"],["is-interconn","false"],["neutron-metadata-proxy-networks",""],["neutron:liveness_check_at","2020-06-15T15:20:40.667624+00:00"],["neutron:metadata_liveness_check_at","2020-06-15T15:20:33.828736+00:00"],["neutron:ovn-metadata-id","f9240536-3953-4298-a455-dd1fdc8dd123"],["neutron:ovn-metadata-sb-cfg","8760"],["ovn-bridge-mappings","datacentre:br-ex,tenant:br-isolated"],["ovn-chassis-mac-mappings",""],["ovn-cms-options",""]]]}},"_date":1592234440669}
{"Chassis":{"5fc4cb32-5c72-436c-9762-fffda5fc166f":{"external_ids":["map",[["datapath-type","system"],["iface-types","erspan,geneve,gre,internal,ip6erspan,ip6gre,lisp,patch,stt,system,tap,vxlan"],["is-interconn","false"],["neutron-metadata-proxy-networks",""],["neutron:liveness_check_at","2020-06-15T15:20:40.667624+00:00"],["neutron:metadata_liveness_check_at","2020-06-15T15:20:40.672304+00:00"],["neutron:ovn-metadata-id","f9240536-3953-4298-a455-dd1fdc8dd123"],["neutron:ovn-metadata-sb-cfg","8760"],["ovn-bridge-mappings","datacentre:br-ex,tenant:br-isolated"],["ovn-chassis-mac-mappings",""],["ovn-cms-options",""]]]}},"_date":1592234440673}