add post-start and pre-stop script

Makefile

@@ -54,7 +54,7 @@ vet: ## Run go vet against code.
 ENVTEST_ASSETS_DIR=$(shell pwd)/testbin
 test: manifests generate fmt vet ## Run tests.
 	mkdir -p ${ENVTEST_ASSETS_DIR}
-	test -f ${ENVTEST_ASSETS_DIR}/setup-envtest.sh || curl -sSLo ${ENVTEST_ASSETS_DIR}/setup-envtest.sh https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/v0.8.3/hack/setup-envtest.sh
+	test -f ${ENVTEST_ASSETS_DIR}/setup-envtest.sh || curl -sSLo ${ENVTEST_ASSETS_DIR}/setup-envtest.sh https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/v0.9.2/hack/setup-envtest.sh
 	source ${ENVTEST_ASSETS_DIR}/setup-envtest.sh; fetch_envtest_tools $(ENVTEST_ASSETS_DIR); setup_envtest_env $(ENVTEST_ASSETS_DIR); go test ./... -coverprofile cover.out
 
 ##@ Build

api/v1alpha1/cluster_types.go

@@ -35,9 +35,15 @@ type ClusterSpec struct {
 	// +kubebuilder:default:=3
 	Replicas *int32 `json:"replicas,omitempty"`
 
+	// The number of pods from that set that must still be available after the
+	// eviction, even in the absence of the evicted pod
+	// +optional
+	// +kubebuilder:default:="50%"
+	MinAvailable string `json:"minAvailable,omitempty"`
+
 	// MysqlOpts is the options of MySQL container.
 	// +optional
-	// +kubebuilder:default:={rootPassword: "", rootHost: "127.0.0.1", user: "qc_usr", password: "Qing@123", database: "qingcloud", initTokuDB: true, resources: {limits: {cpu: "500m", memory: "1Gi"}, requests: {cpu: "100m", memory: "256Mi"}}}
+	// +kubebuilder:default:={rootPassword: "", rootHost: "localhost", user: "qc_usr", password: "Qing@123", database: "qingcloud", initTokuDB: true, resources: {limits: {cpu: "500m", memory: "1Gi"}, requests: {cpu: "100m", memory: "256Mi"}}}
 	MysqlOpts MysqlOpts `json:"mysqlOpts,omitempty"`
 
 	// XenonOpts is the options of xenon container.
@@ -80,7 +86,7 @@ type MysqlOpts struct {
 
 	// The root user's host.
 	// +optional
-	// +kubebuilder:default:="127.0.0.1"
+	// +kubebuilder:default:="localhost"
 	RootHost string `json:"rootHost,omitempty"`
 
 	// Username of new user to create.

charts/mysql-operator/templates/cluster_rbac.yaml

@@ -99,6 +99,18 @@ rules:
   - get
   - patch
   - update
+- apiGroups:
+  - policy
+  resources:
+  - poddisruptionbudgets
+  verbs:
+  - create
+  - delete
+  - get
+  - list
+  - patch
+  - update
+  - watch
 - apiGroups:
   - rbac.authorization.k8s.io
   resources:

cluster/cluster.go

@@ -64,6 +64,10 @@ func (c *Cluster) Validate() error {
 		return fmt.Errorf("spec.mysqlOpts.user cannot be root|%s|%s|%s", utils.ReplicationUser, utils.OperatorUser, utils.MetricsUser)
 	}
 
+	if c.Spec.MysqlOpts.RootHost == "127.0.0.1" {
+		return fmt.Errorf("spec.mysqlOpts.rootHost cannot be 127.0.0.1")
+	}
+
 	return nil
 }
 
@@ -248,7 +252,7 @@ func (c *Cluster) EnsureVolumeClaimTemplates(schema *runtime.Scheme) ([]corev1.P
 // GetNameForResource returns the name of a resource from above
 func (c *Cluster) GetNameForResource(name utils.ResourceName) string {
 	switch name {
-	case utils.StatefulSet, utils.ConfigMap, utils.HeadlessSVC:
+	case utils.StatefulSet, utils.ConfigMap, utils.HeadlessSVC, utils.PodDisruptionBudget:
 		return fmt.Sprintf("%s-mysql", c.Name)
 	case utils.LeaderService:
 		return fmt.Sprintf("%s-leader", c.Name)

cluster/container/init_mysql_test.go

@@ -42,6 +42,7 @@ var (
 			},
 			MysqlVersion: "5.7",
 			MysqlOpts: mysqlv1alpha1.MysqlOpts{
+				RootHost:   "localhost",
 				InitTokuDB: false,
 			},
 		},
@@ -54,11 +55,6 @@ var (
 			Name:      utils.ConfVolumeName,
 			MountPath: utils.ConfVolumeMountPath,
 		},
-		{
-			Name:      utils.ConfMapVolumeName,
-			MountPath: utils.MyCnfMountPath,
-			SubPath:   "my.cnf",
-		},
 		{
 			Name:      utils.DataVolumeName,
 			MountPath: utils.DataVolumeMountPath,
@@ -82,7 +78,7 @@ var (
 		},
 		{
 			Name:  "MYSQL_ROOT_HOST",
-			Value: "127.0.0.1",
+			Value: "localhost",
 		},
 		{
 			Name:  "MYSQL_INIT_ONLY",
@@ -100,42 +96,6 @@ var (
 				},
 			},
 		},
-		{
-			Name: "MYSQL_DATABASE",
-			ValueFrom: &corev1.EnvVarSource{
-				SecretKeyRef: &corev1.SecretKeySelector{
-					LocalObjectReference: corev1.LocalObjectReference{
-						Name: sctName,
-					},
-					Key:      "mysql-database",
-					Optional: &optTrue,
-				},
-			},
-		},
-		{
-			Name: "MYSQL_USER",
-			ValueFrom: &corev1.EnvVarSource{
-				SecretKeyRef: &corev1.SecretKeySelector{
-					LocalObjectReference: corev1.LocalObjectReference{
-						Name: sctName,
-					},
-					Key:      "mysql-user",
-					Optional: &optTrue,
-				},
-			},
-		},
-		{
-			Name: "MYSQL_PASSWORD",
-			ValueFrom: &corev1.EnvVarSource{
-				SecretKeyRef: &corev1.SecretKeySelector{
-					LocalObjectReference: corev1.LocalObjectReference{
-						Name: sctName,
-					},
-					Key:      "mysql-password",
-					Optional: &optTrue,
-				},
-			},
-		},
 	}
 	initMysqlCase = EnsureContainer("init-mysql", &testInitMysqlCluster)
 )

cluster/container/init_sidecar.go

@@ -17,6 +17,7 @@ limitations under the License.
 package container
 
 import (
+	"fmt"
 	"strconv"
 
 	corev1 "k8s.io/api/core/v1"
@@ -69,6 +70,14 @@ func (c *initSidecar) getEnvVars() []corev1.EnvVar {
 			Name:  "SERVICE_NAME",
 			Value: c.GetNameForResource(utils.HeadlessSVC),
 		},
+		{
+			Name:  "STATEFULSET_NAME",
+			Value: c.GetNameForResource(utils.StatefulSet),
+		},
+		{
+			Name:  "REPLICAS",
+			Value: fmt.Sprintf("%d", *c.Spec.Replicas),
+		},
 		{
 			Name:  "ADMIT_DEFEAT_HEARBEAT_COUNT",
 			Value: strconv.Itoa(int(*c.Spec.XenonOpts.AdmitDefeatHearbeatCount)),

cluster/container/init_sidecar_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package container
 
 import (
+	"fmt"
 	"strconv"
 	"testing"
 
@@ -32,11 +33,13 @@ import (
 var (
 	defeatCount             int32 = 1
 	electionTimeout         int32 = 5
+	replicas                int32 = 3
 	initSidecarMysqlCluster       = mysqlv1alpha1.Cluster{
 		ObjectMeta: metav1.ObjectMeta{
 			Name: "sample",
 		},
 		Spec: mysqlv1alpha1.ClusterSpec{
+			Replicas: &replicas,
 			PodSpec: mysqlv1alpha1.PodSpec{
 				SidecarImage: "sidecar image",
 				Resources: corev1.ResourceRequirements{
@@ -80,6 +83,14 @@ var (
 			Name:  "SERVICE_NAME",
 			Value: "sample-mysql",
 		},
+		{
+			Name:  "STATEFULSET_NAME",
+			Value: "sample-mysql",
+		},
+		{
+			Name:  "REPLICAS",
+			Value: fmt.Sprintf("%d", *testInitSidecarCluster.Spec.Replicas),
+		},
 		{
 			Name:  "ADMIT_DEFEAT_HEARBEAT_COUNT",
 			Value: strconv.Itoa(int(*testInitSidecarCluster.Spec.XenonOpts.AdmitDefeatHearbeatCount)),
@@ -104,6 +115,42 @@ var (
 				},
 			},
 		},
+		{
+			Name: "MYSQL_DATABASE",
+			ValueFrom: &corev1.EnvVarSource{
+				SecretKeyRef: &corev1.SecretKeySelector{
+					LocalObjectReference: corev1.LocalObjectReference{
+						Name: sctName,
+					},
+					Key:      "mysql-database",
+					Optional: &optTrue,
+				},
+			},
+		},
+		{
+			Name: "MYSQL_USER",
+			ValueFrom: &corev1.EnvVarSource{
+				SecretKeyRef: &corev1.SecretKeySelector{
+					LocalObjectReference: corev1.LocalObjectReference{
+						Name: sctName,
+					},
+					Key:      "mysql-user",
+					Optional: &optTrue,
+				},
+			},
+		},
+		{
+			Name: "MYSQL_PASSWORD",
+			ValueFrom: &corev1.EnvVarSource{
+				SecretKeyRef: &corev1.SecretKeySelector{
+					LocalObjectReference: corev1.LocalObjectReference{
+						Name: sctName,
+					},
+					Key:      "mysql-password",
+					Optional: &optTrue,
+				},
+			},
+		},
 		{
 			Name: "MYSQL_REPL_USER",
 			ValueFrom: &corev1.EnvVarSource{
@@ -228,7 +275,7 @@ func TestGetInitSidecarEnvVar(t *testing.T) {
 			Cluster: &testToKuDBMysqlCluster,
 		}
 		tokudbCase := EnsureContainer("init-sidecar", &testTokuDBCluster)
-		testTokuDBEnv := make([]corev1.EnvVar, 13)
+		testTokuDBEnv := make([]corev1.EnvVar, 18)
 		copy(testTokuDBEnv, defaultInitSidecarEnvs)
 		testTokuDBEnv = append(testTokuDBEnv, corev1.EnvVar{
 			Name:  "INIT_TOKUDB",

cluster/container/mysql_test.go

@@ -107,7 +107,7 @@ func TestGetMysqlLivenessProbe(t *testing.T) {
 	livenessProbe := &corev1.Probe{
 		Handler: corev1.Handler{
 			Exec: &corev1.ExecAction{
-				Command: []string{"sh", "-c", "mysqladmin ping -uroot -p${MYSQL_ROOT_PASSWORD}"},
+				Command: []string{"sh", "-c", "mysqladmin --defaults-file=/etc/mysql/client.conf ping"},
 			},
 		},
 		InitialDelaySeconds: 30,
@@ -123,7 +123,7 @@ func TestGetMysqlReadinessProbe(t *testing.T) {
 	readinessProbe := &corev1.Probe{
 		Handler: corev1.Handler{
 			Exec: &corev1.ExecAction{
-				Command: []string{"sh", "-c", `mysql -uroot -p${MYSQL_ROOT_PASSWORD} -e "SELECT 1"`},
+				Command: []string{"sh", "-c", `test $(mysql --defaults-file=/etc/mysql/client.conf -NB -e "SELECT 1") -eq 1`},
 			},
 		},
 		InitialDelaySeconds: 10,
@@ -139,12 +139,7 @@ func TestGetMysqlVolumeMounts(t *testing.T) {
 	volumeMounts := []corev1.VolumeMount{
 		{
 			Name:      "conf",
-			MountPath: "/etc/mysql/conf.d",
-		},
-		{
-			Name:      "config-map",
-			MountPath: "/etc/mysql/my.cnf",
-			SubPath:   "my.cnf",
+			MountPath: "/etc/mysql",
 		},
 		{
 			Name:      "data",

cluster/container/xenon.go

@@ -17,8 +17,6 @@ limitations under the License.
 package container
 
 import (
-	"fmt"
-
 	corev1 "k8s.io/api/core/v1"
 
 	"github.com/radondb/radondb-mysql-kubernetes/cluster"
@@ -55,11 +53,15 @@ func (c *xenon) getEnvVars() []corev1.EnvVar {
 
 // getLifecycle get the container lifecycle.
 func (c *xenon) getLifecycle() *corev1.Lifecycle {
-	arg := fmt.Sprintf("until (xenoncli xenon ping && xenoncli cluster add %s) > /dev/null 2>&1; do sleep 2; done", c.CreatePeers())
 	return &corev1.Lifecycle{
 		PostStart: &corev1.Handler{
 			Exec: &corev1.ExecAction{
-				Command: []string{"sh", "-c", arg},
+				Command: []string{"sh", "-c", "/scripts/post-start.sh"},
+			},
+		},
+		PreStop: &corev1.Handler{
+			Exec: &corev1.ExecAction{
+				Command: []string{"sh", "-c", "/scripts/pre-stop.sh"},
 			},
 		},
 	}

cluster/container/xenon_test.go

@@ -73,9 +73,12 @@ func TestGetXenonLifecycle(t *testing.T) {
 	lifecycle := &corev1.Lifecycle{
 		PostStart: &corev1.Handler{
 			Exec: &corev1.ExecAction{
-				Command: []string{"sh", "-c",
-					"until (xenoncli xenon ping && xenoncli cluster add sample-mysql-0.sample-mysql.default:8801) > /dev/null 2>&1; do sleep 2; done",
-				},
+				Command: []string{"sh", "-c", "/scripts/post-start.sh"},
+			},
+		},
+		PreStop: &corev1.Handler{
+			Exec: &corev1.ExecAction{
+				Command: []string{"sh", "-c", "/scripts/pre-stop.sh"},
 			},
 		},
 	}

cluster/syncer/config_map.go

@@ -52,9 +52,7 @@ func NewConfigMapSyncer(cli client.Client, c *cluster.Cluster) syncer.Interface
 		}
 
 		cm.Data = map[string]string{
-			"my.cnf":          data,
-			"leader-start.sh": buildLeaderStart(c),
-			"leader-stop.sh":  buildLeaderStop(c),
+			"my.cnf": data,
 		}
 
 		return nil
@@ -117,21 +115,3 @@ func writeConfigs(cfg *ini.File) (string, error) {
 	}
 	return buf.String(), nil
 }
-
-// buildLeaderStart build the leader-start.sh.
-func buildLeaderStart(c *cluster.Cluster) string {
-	return fmt.Sprintf(`#!/usr/bin/env bash
-curl -X PATCH -H "Authorization: Bearer $(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" -H "Content-Type: application/json-patch+json" \
---cacert /var/run/secrets/kubernetes.io/serviceaccount/ca.crt https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1/namespaces/%s/pods/$HOSTNAME \
--d '[{"op": "replace", "path": "/metadata/labels/role", "value": "leader"}]'
-`, c.Namespace)
-}
-
-// buildLeaderStop build the leader-stop.sh.
-func buildLeaderStop(c *cluster.Cluster) string {
-	return fmt.Sprintf(`#!/usr/bin/env bash
-curl -X PATCH -H "Authorization: Bearer $(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" -H "Content-Type: application/json-patch+json" \
---cacert /var/run/secrets/kubernetes.io/serviceaccount/ca.crt https://$KUBERNETES_SERVICE_HOST:$KUBERNETES_PORT_443_TCP_PORT/api/v1/namespaces/%s/pods/$HOSTNAME \
--d '[{"op": "replace", "path": "/metadata/labels/role", "value": "follower"}]'
-`, c.Namespace)
-}