KVM: Monitor VM IP address using qemu-guest-agent

src/im_mad/remotes/kvm-probes.d/guestagent.conf

@@ -4,9 +4,18 @@
 # enable or disable monitoring information from the qemu guest agent.
 :enabled: false
 # Commands used to gather VM information.
-# Each command key will appear on the MONITORING message from the poll probe
 # The value will be run as a command executed with virsh qemu-agent-command
 # The $vm_id substring, if existing, will be replaced by the VM ID when the monitoring probes
 # are looping on each of the VMs on the host. Each command will be run once per VM.
+# The expected response for each command is a JSON string with a "return" key.
+# The contents of it will appear on the MONITORING message from the poll probe.
 :commands:
   :vm_qemu_ping: "one-$vm_id '{\"execute\":\"guest-ping\"}' --timeout 5"
+  # The first non-loopback address
+  :vm_ip_address:       >
+                        one-$vm_id '{"execute":"guest-network-get-interfaces"}' --timeout 5 |
+                        jq '{"return" : [ .return[]."ip-addresses"[]|select(."ip-address-type"=="ipv4" and (."ip-address"|startswith("127.")|not))."ip-address" ][0]}'
+  # Array of all IP addresses
+  :vm_ip_address_list:  >
+                        one-$vm_id '{"execute":"guest-network-get-interfaces"}' --timeout 5 |
+                        jq '{"return" : [ .return[]."ip-addresses"[]."ip-address" ]}'