From 37808e230ef88e6c46605303200e7c3a244d7fc3 Mon Sep 17 00:00:00 2001
From: acekingke <aceking.ke@gmail.com>
Date: Thu, 21 Jul 2022 13:04:42 +0800
Subject: [PATCH] feat(singleNode): Support running single node. #361

---
 api/v1alpha1/mysqlcluster_types.go                          | 2 +-
 .../crds/mysql.radondb.com_mysqlclusters.yaml               | 1 +
 config/crd/bases/mysql.radondb.com_mysqlclusters.yaml       | 1 +
 mysqlcluster/container/xenon.go                             | 6 +++++-
 4 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/api/v1alpha1/mysqlcluster_types.go b/api/v1alpha1/mysqlcluster_types.go
index 932a7e467..26821755c 100644
--- a/api/v1alpha1/mysqlcluster_types.go
+++ b/api/v1alpha1/mysqlcluster_types.go
@@ -31,7 +31,7 @@ type MysqlClusterSpec struct {
 
 	// Replicas is the number of pods.
 	// +optional
-	// +kubebuilder:validation:Enum=0;2;3;5
+	// +kubebuilder:validation:Enum=0;1;2;3;5
 	// +kubebuilder:default:=3
 	Replicas *int32 `json:"replicas,omitempty"`
 
diff --git a/charts/mysql-operator/crds/mysql.radondb.com_mysqlclusters.yaml b/charts/mysql-operator/crds/mysql.radondb.com_mysqlclusters.yaml
index 88d891c56..2472051bd 100644
--- a/charts/mysql-operator/crds/mysql.radondb.com_mysqlclusters.yaml
+++ b/charts/mysql-operator/crds/mysql.radondb.com_mysqlclusters.yaml
@@ -1259,6 +1259,7 @@ spec:
                 description: Replicas is the number of pods.
                 enum:
                 - 0
+                - 1
                 - 2
                 - 3
                 - 5
diff --git a/config/crd/bases/mysql.radondb.com_mysqlclusters.yaml b/config/crd/bases/mysql.radondb.com_mysqlclusters.yaml
index 88d891c56..2472051bd 100644
--- a/config/crd/bases/mysql.radondb.com_mysqlclusters.yaml
+++ b/config/crd/bases/mysql.radondb.com_mysqlclusters.yaml
@@ -1259,6 +1259,7 @@ spec:
                 description: Replicas is the number of pods.
                 enum:
                 - 0
+                - 1
                 - 2
                 - 3
                 - 5
diff --git a/mysqlcluster/container/xenon.go b/mysqlcluster/container/xenon.go
index 37f520c50..b42d1a6e4 100644
--- a/mysqlcluster/container/xenon.go
+++ b/mysqlcluster/container/xenon.go
@@ -43,7 +43,11 @@ func (c *xenon) getImage() string {
 
 // getCommand get the container command.
 func (c *xenon) getCommand() []string {
-	return nil
+	if *c.Spec.Replicas == 1 {
+		return []string{"xenon", "-c", "/etc/xenon/xenon.json", "-r", "LEADER"}
+	}
+	// If return nil, statefulset never update command , And I don't know why.
+	return []string{"xenon", "-c", "/etc/xenon/xenon.json"}
 }
 
 // getEnvVars get the container env.