waves: define a wave duration for the "last" wave

To avoid having all the hosts in the last wave all updating at once when
the last wave starts, we define an intermediary wave before the actual
last wave to define its wave duration so updog can evenly spread the
hosts throughout the "last" wave.

sources/updater/waves/accelerated-waves.toml

@@ -11,8 +11,14 @@ fleet_percentage = 12
 
 [[waves]]
 start_after = '8 hours'
-fleet_percentage = 50
+fleet_percentage = 40
 
+[[waves]]
+start_after = '16 hours'
+fleet_percentage = 80
+
+# Last 20 percent of the hosts will update immediately after 24 hours since the start of
+# deployment. Unlike the other waves, there will be no velocity control.
 [[waves]]
 start_after = '1 day'
 fleet_percentage = 100

sources/updater/waves/default-waves.toml

@@ -11,12 +11,22 @@ fleet_percentage = 5
 
 [[waves]]
 start_after = '1 day'
-fleet_percentage = 10
+fleet_percentage = 15
 
 [[waves]]
-start_after = '3 days'
-fleet_percentage = 25
+start_after = '2 days'
+fleet_percentage = 40
 
+[[waves]]
+start_after = '4 days'
+fleet_percentage = 60
+
+[[waves]]
+start_after = '5 days'
+fleet_percentage = 90
+
+# Last 10 percent of the hosts will update immediately after 6 days since the start of
+# deployment. Unlike the other waves, there will be no velocity control.
 [[waves]]
 start_after = '6 days'
 fleet_percentage = 100

sources/updater/waves/ohno.toml

@@ -1,14 +1,23 @@
 # The following represents an "emergency" set of update waves for a rapid
-# deployment. The deployment lasts for 3 hours, with a small initial wave,
-# and then all nodes will be updated after the first hour.
+# deployment. The deployment lasts for 3 hours, with a small initial wave.
 [[waves]]
-start_after = '1 hour'
+start_after = '30 minutes'
 fleet_percentage = 5
 
 [[waves]]
-start_after = '2 hours'
+start_after = '60 minutes'
 fleet_percentage = 25
 
 [[waves]]
-start_after = '3 hours'
+start_after = '120 minutes'
+fleet_percentage = 50
+
+[[waves]]
+start_after = '150 minutes'
+fleet_percentage = 90
+
+# Last 10 percent of the hosts will update immediately after 3 hours since the start of
+# deployment. Unlike the other waves, there will be no velocity control.
+[[waves]]
+start_after = '180 minutes'
 fleet_percentage = 100