bump pooler image and more coalescing for CRD config (#1004)

Co-authored-by: Felix Kunde <felix.kunde@zalando.de>

pkg/util/config/config.go

@@ -150,7 +150,7 @@ type Config struct {
 	EnablePodDisruptionBudget *bool             `name:"enable_pod_disruption_budget" default:"true"`
 	EnableInitContainers      *bool             `name:"enable_init_containers" default:"true"`
 	EnableSidecars            *bool             `name:"enable_sidecars" default:"true"`
-	Workers                   uint32            `name:"workers" default:"4"`
+	Workers                   uint32            `name:"workers" default:"8"`
 	APIPort                   int               `name:"api_port" default:"8080"`
 	RingLogLines              int               `name:"ring_log_lines" default:"100"`
 	ClusterHistoryEntries     int               `name:"cluster_history_entries" default:"1000"`

pkg/util/util.go

@@ -147,6 +147,30 @@ func Coalesce(val, defaultVal string) string {
 	return val
 }
 
+// CoalesceStrArr returns the first argument if it is not null, otherwise the second one.
+func CoalesceStrArr(val, defaultVal []string) []string {
+	if len(val) == 0 {
+		return defaultVal
+	}
+	return val
+}
+
+// CoalesceStrMap returns the first argument if it is not null, otherwise the second one.
+func CoalesceStrMap(val, defaultVal map[string]string) map[string]string {
+	if len(val) == 0 {
+		return defaultVal
+	}
+	return val
+}
+
+// CoalesceInt works like coalesce but for int
+func CoalesceInt(val, defaultVal int) int {
+	if val == 0 {
+		return defaultVal
+	}
+	return val
+}
+
 // CoalesceInt32 works like coalesce but for *int32
 func CoalesceInt32(val, defaultVal *int32) *int32 {
 	if val == nil {
@@ -155,6 +179,14 @@ func CoalesceInt32(val, defaultVal *int32) *int32 {
 	return val
 }
 
+// CoalesceUInt32 works like coalesce but for uint32
+func CoalesceUInt32(val, defaultVal uint32) uint32 {
+	if val == 0 {
+		return defaultVal
+	}
+	return val
+}
+
 // CoalesceBool works like coalesce but for *bool
 func CoalesceBool(val, defaultVal *bool) *bool {
 	if val == nil {
@@ -163,6 +195,18 @@ func CoalesceBool(val, defaultVal *bool) *bool {
 	return val
 }
 
+// CoalesceDuration works like coalesce but for time.Duration
+func CoalesceDuration(val time.Duration, defaultVal string) time.Duration {
+	if val == 0 {
+		duration, err := time.ParseDuration(defaultVal)
+		if err != nil {
+			panic(err)
+		}
+		return duration
+	}
+	return val
+}
+
 // Test if any of the values is nil
 func testNil(values ...*int32) bool {
 	for _, v := range values {