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configmap.go
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configmap.go
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package kubernetes
import (
"context"
"fmt"
"github.com/containersolutions/redis-cluster-operator/api/v1alpha1"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"strings"
)
func FetchExistingConfigMap(ctx context.Context, kubeClient client.Client, cluster *v1alpha1.RedisCluster) (*v1.ConfigMap, error) {
configMap := &v1.ConfigMap{}
err := kubeClient.Get(ctx, types.NamespacedName{
Namespace: cluster.Namespace,
Name: getConfigMapName(cluster),
}, configMap)
return configMap, err
}
func getConfigMapName(cluster *v1alpha1.RedisCluster) string {
return fmt.Sprintf("%s-config", cluster.Name)
}
func getDefaultRedisConfig() map[string]string {
return map[string]string{
"port": "6379",
"cluster-enabled": "yes",
"cluster-config-file": "nodes.conf",
"cluster-node-timeout": "5000",
}
}
func getAppliedRedisConfig(cluster *v1alpha1.RedisCluster) map[string]string {
config := getDefaultRedisConfig()
redisConfig := getRedisConfigFromMultilineYaml(cluster.Spec.Config)
for setting, value := range redisConfig {
config[setting] = value
}
return config
}
func getRedisConfigAsMultilineYaml(config map[string]string) string {
result := ""
for setting, value := range config {
result += fmt.Sprintf("%s %s\n", setting, value)
}
return result
}
func getRedisConfigFromMultilineYaml(config string) map[string]string {
result := map[string]string{}
for _, settingLine := range strings.Split(config, "\n") {
if strings.TrimSpace(settingLine) == "" {
continue
}
settingParts := strings.Split(settingLine, " ")
setting := settingParts[0]
value := strings.Join(settingParts[1:], " ")
result[setting] = value
}
return result
}
func createConfigMapSpec(cluster *v1alpha1.RedisCluster) *v1.ConfigMap {
redisConfig := getAppliedRedisConfig(cluster)
configMap := &v1.ConfigMap{
TypeMeta: metav1.TypeMeta{},
ObjectMeta: metav1.ObjectMeta{
Name: getConfigMapName(cluster),
Namespace: cluster.Namespace,
},
Data: map[string]string{
"redis.conf": getRedisConfigAsMultilineYaml(redisConfig),
},
}
return configMap
}
func CreateConfigMap(ctx context.Context, kubeClient client.Client, cluster *v1alpha1.RedisCluster) (*v1.ConfigMap, error) {
configMap := createConfigMapSpec(cluster)
err := kubeClient.Create(ctx, configMap)
return configMap, err
}