add sidecar image

Author: drivebyer

pkg/apis/mysql/v1alpha1/mysqlcluster_types.go

@@ -57,6 +57,11 @@ type MysqlClusterSpec struct {
 	// +optional
 	Image string `json:"image,omitempty"`
 
+	// To specify the image that will be used for sidecar container.
+	// It will override --sidecar-image or --sidecar-mysql8-image flags.
+	// +optional
+	SidecarImage string `json:"sidecarImage,omitempty"`
+
 	// A bucket URL that contains a xtrabackup to initialize the mysql database.
 	// +optional
 	InitBucketURL string `json:"initBucketURL,omitempty"`

pkg/internal/mysqlcluster/mysqlcluster.go

@@ -268,13 +268,14 @@ func (c *MysqlCluster) GetNamespacedName() types.NamespacedName {
 
 // GetSidecarImage selects the sidecar docker image based on mysql version
 func (c *MysqlCluster) GetSidecarImage() string {
+	if c.Spec.SidecarImage != "" {
+		return c.Spec.SidecarImage
+	}
 	// decide the sidecar image based on mysql version
-	sidecarImage := options.GetOptions().SidecarMysql57Image
 	if c.GetMySQLSemVer().Major == 8 {
-		sidecarImage = options.GetOptions().SidecarMysql8Image
+		return options.GetOptions().SidecarMysql8Image
 	}
-
-	return sidecarImage
+	return options.GetOptions().SidecarMysql57Image
 }
 
 // IsClusterReady checks if the cluster is ready or not.