+
+# upgrading nodes
+
+targets like `nodefcdistro-f20` can be used to change a node's fcdistro
+
+----
+
+usual sequence for testing a node upgrade; we start from a f20 myplc and upgrade the node to f21
+
+ would be - e.g. from f20 to f21
+
+
+ f20
+ bond ../$(t)*f21
+ rung
+ run nodefcdistro-f21 nodestate-upgrade
+ run qemu-kill-mine qemu-start wait-node
+
+-----
+Or, the other way around, using a f21 myplc, and a f20 bonding node, that we upgrade
+
+ f21
+ bond ../$(t)*f20
+ rung
+ rung node qemu-start wait-node
+ rung nodefcdistro-f21 nodestate-upgrade
+ rung qemu-kill-mine qemu-start wait-node
+
+