I need to change the name of the keys in a struct through go.
I have this function
func (p *DbConfig) myfunction(prefix string, namespace string, dbName string, userSecret string) []corev1.EnvVar {
prefix = Underscore(prefix)
namespace = Underscore(namespace)
envs := filter(p.myfunction(prefix), func(item corev1.EnvVar) bool {
if item.Name == "USER" {
return false
}
if item.Name == "PASSWORD" {
return false
}
return true
})
return append(envs, []corev1.EnvVar{
{
Name: prefix + "DB_NAME",
Value: namespace + dbName,
},
{
Name: prefix + "DB_USER",
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
LocalObjectReference: corev1.LocalObjectReference{
Name: userSecret,
},
Key: "POSTGRES_USER",
},
},
},
{
Name: prefix + "DB_PASSWORD",
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
LocalObjectReference: corev1.LocalObjectReference{
Name: userSecret,
},
Key: "POSTGRES_PASSWORD",
},
},
},
}...)
}
Where EnVar struct looks like
type EnvVar struct {
Name string `json:"name" protobuf:"bytes,1,opt,name=name"`
Value string `json:"value,omitempty" protobuf:"bytes,2,opt,name=value"`
ValueFrom *EnvVarSource `json:"valueFrom,omitempty" protobuf:"bytes,3,opt,name=valueFrom"`
}
type EnvVarSource struct {
FieldRef *ObjectFieldSelector `json:"fieldRef,omitempty" protobuf:"bytes,1,opt,name=fieldRef"`
ResourceFieldRef *ResourceFieldSelector `json:"resourceFieldRef,omitempty" protobuf:"bytes,2,opt,name=resourceFieldRef"`
ConfigMapKeyRef *ConfigMapKeySelector `json:"configMapKeyRef,omitempty" protobuf:"bytes,3,opt,name=configMapKeyRef"`
SecretKeyRef *SecretKeySelector `json:"secretKeyRef,omitempty" protobuf:"bytes,4,opt,name=secretKeyRef"`
}
and here I need to change the values containing “CONTAINER” with the correct env vars used in the container.
func containerEnvs(hub *immv1alpha1.ImmHub, instance *immv1alpha1.Container) []corev1.EnvVar {
postgresService := hub.Spec.DbConfig.myfunction("CONTAINER_", hub.Namespace, instance.Spec.dbName, instance.Spec.userSecret)
//Here I want to modify the keys of the struct that I need so that correct environment variables are passed
postgresService[0].Name = "DATABASE_NAME"
postgresService[1].Name = "DATABASE_USER"
service := []corev1.EnvVar{
{
Name: "DATABASE_NAME",
Value: instance.Spec.dbName,
}
}
return append(service, append(postgresService)...)
}
The output of the postgresService variable looks like
[{CONTAINER_DB_NAME testdb nil} {CONTAINER_DB_USER &EnvVarSource{FieldRef:nil,ResourceFieldRef:nil,ConfigMapKeyRef:nil,SecretKeyRef:&SecretKeySelector{LocalObjectReference:LocalObjectReference{Name:secret,},Key:POSTGRES_USER,Optional:nil,},}} {CONTAINER_DB_PASSWORD &EnvVarSource{FieldRef:nil,ResourceFieldRef:nil,ConfigMapKeyRef:nil,SecretKeyRef:&SecretKeySelector{LocalObjectReference:LocalObjectReference{Name:secret,},Key:POSTGRES_PASSWORD,Optional:nil,},}}]
I have two problems here:
1- Is this the best way to change the default key names in my case?
2- If the variable postgresService contains more values but I just need the DATABASE_NAME and DATABASE_USER how can I delete the rest of the values from postgresService?