autoupdate: reconcile rollout status and add strategy interface

api/proto/teleport/autoupdate/v1/autoupdate.proto

@@ -178,6 +178,12 @@ message AutoUpdateAgentRolloutStatusGroup {
   google.protobuf.Timestamp last_update_time = 4;
   // last_update_reason is the trigger for the last update
   string last_update_reason = 5;
+  // config_days when the update can run. Supported values are "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" and "*"
+  repeated string config_days = 6;
+  // config_start_hour to initiate update
+  int32 config_start_hour = 7;
+  // config_wait_days after last group succeeds before this group can run. This can only be used when the strategy is "halt-on-failure".
+  int64 config_wait_days = 8;
 }
 
 // AutoUpdateAgentGroupState represents the agent group state. This state controls whether the agents from this group

api/types/maintenance.go

@@ -45,10 +45,10 @@ var validWeekdays = [7]time.Weekday{
 	time.Saturday,
 }
 
-// parseWeekday attempts to interpret a string as a time.Weekday. In the interest of flexibility,
+// ParseWeekday attempts to interpret a string as a time.Weekday. In the interest of flexibility,
 // parsing is case-insensitive and supports the common three-letter shorthand accepted by many
 // common scheduling utilites (e.g. contab, systemd timers).
-func parseWeekday(s string) (day time.Weekday, ok bool) {
+func ParseWeekday(s string) (day time.Weekday, ok bool) {
 	for _, w := range validWeekdays {
 		if strings.EqualFold(w.String(), s) || strings.EqualFold(w.String()[:3], s) {
 			return w, true
@@ -75,7 +75,7 @@ func (w *AgentUpgradeWindow) generator(from time.Time) func() (start time.Time,
 
 	var weekdays []time.Weekday
 	for _, d := range w.Weekdays {
-		if p, ok := parseWeekday(d); ok {
+		if p, ok := ParseWeekday(d); ok {
 			weekdays = append(weekdays, p)
 		}
 	}
@@ -203,7 +203,7 @@ func (m *ClusterMaintenanceConfigV1) CheckAndSetDefaults() error {
 		}
 
 		for _, day := range m.Spec.AgentUpgrades.Weekdays {
-			if _, ok := parseWeekday(day); !ok {
+			if _, ok := ParseWeekday(day); !ok {
 				return trace.BadParameter("invalid weekday in agent upgrade window: %q", day)
 			}
 		}

api/types/maintenance_test.go

@@ -205,7 +205,7 @@ func TestWeekdayParser(t *testing.T) {
 	}
 
 	for _, tt := range tts {
-		day, ok := parseWeekday(tt.input)
+		day, ok := ParseWeekday(tt.input)
 		if tt.fail {
 			require.False(t, ok)
 			continue

lib/autoupdate/rollout/controller.go

@@ -56,12 +56,16 @@ func NewController(client Client, log *slog.Logger, clock clockwork.Clock) (*Con
 	if clock == nil {
 		return nil, trace.BadParameter("missing clock")
 	}
+
 	return &Controller{
 		clock: clock,
 		log:   log,
 		reconciler: reconciler{
-			clt: client,
-			log: log,
+			clt:               client,
+			log:               log,
+			rolloutStrategies: []rolloutStrategy{
+				// TODO(hugoShaka): add the strategies here as we implement them
+			},
 		},
 	}, nil
 }