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envvar.go
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envvar.go
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package utils
import (
"fmt"
druidv1alpha1 "github.com/gardener/etcd-druid/api/v1alpha1"
"github.com/gardener/etcd-druid/pkg/common"
corev1 "k8s.io/api/core/v1"
"k8s.io/utils/pointer"
)
// GetEnvVarFromValue returns environment variable object with the provided name and value
func GetEnvVarFromValue(name, value string) corev1.EnvVar {
return corev1.EnvVar{
Name: name,
Value: value,
}
}
// GetEnvVarFromFieldPath returns environment variable object with provided name and value from field path
func GetEnvVarFromFieldPath(name, fieldPath string) corev1.EnvVar {
return corev1.EnvVar{
Name: name,
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: fieldPath,
},
},
}
}
// GetEnvVarFromSecret returns environment variable object with provided name and optional value from secret
func GetEnvVarFromSecret(name, secretName, secretKey string, optional bool) corev1.EnvVar {
return corev1.EnvVar{
Name: name,
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
LocalObjectReference: corev1.LocalObjectReference{
Name: secretName,
},
Key: secretKey,
Optional: pointer.Bool(optional),
},
},
}
}
// GetProviderEnvVars returns provider-specific environment variables for the given store
func GetProviderEnvVars(store *druidv1alpha1.StoreSpec) ([]corev1.EnvVar, error) {
var envVars []corev1.EnvVar
provider, err := StorageProviderFromInfraProvider(store.Provider)
if err != nil {
return nil, fmt.Errorf("storage provider is not recognized while fetching secrets from environment variable")
}
const credentialsMountPath = "/var/etcd-backup"
switch provider {
case S3:
envVars = append(envVars, GetEnvVarFromValue(common.EnvAWSApplicationCredentials, credentialsMountPath))
case ABS:
envVars = append(envVars, GetEnvVarFromValue(common.EnvAzureApplicationCredentials, credentialsMountPath))
case GCS:
envVars = append(envVars, GetEnvVarFromValue(common.EnvGoogleApplicationCredentials, "/var/.gcp/serviceaccount.json"))
envVars = append(envVars, GetEnvVarFromSecret(common.EnvGoogleStorageAPIEndpoint, store.SecretRef.Name, "storageAPIEndpoint", true))
case Swift:
envVars = append(envVars, GetEnvVarFromValue(common.EnvOpenstackApplicationCredentials, credentialsMountPath))
case OSS:
envVars = append(envVars, GetEnvVarFromValue(common.EnvAlicloudApplicationCredentials, credentialsMountPath))
case ECS:
if store.SecretRef == nil {
return nil, fmt.Errorf("no secretRef could be configured for backup store of ECS")
}
envVars = append(envVars, GetEnvVarFromSecret(common.EnvECSEndpoint, store.SecretRef.Name, "endpoint", false))
envVars = append(envVars, GetEnvVarFromSecret(common.EnvECSAccessKeyID, store.SecretRef.Name, "accessKeyID", false))
envVars = append(envVars, GetEnvVarFromSecret(common.EnvECSSecretAccessKey, store.SecretRef.Name, "secretAccessKey", false))
case OCS:
envVars = append(envVars, GetEnvVarFromValue(common.EnvOpenshiftApplicationCredentials, credentialsMountPath))
}
return envVars, nil
}
// GetBackupRestoreContainerEnvVars returns backup-restore container environment variables for the given store
func GetBackupRestoreContainerEnvVars(store *druidv1alpha1.StoreSpec) ([]corev1.EnvVar, error) {
var envVars []corev1.EnvVar
envVars = append(envVars, GetEnvVarFromFieldPath(common.EnvPodName, "metadata.name"))
envVars = append(envVars, GetEnvVarFromFieldPath(common.EnvPodNamespace, "metadata.namespace"))
if store == nil {
return envVars, nil
}
storageContainer := pointer.StringDeref(store.Container, "")
envVars = append(envVars, GetEnvVarFromValue(common.EnvStorageContainer, storageContainer))
providerEnvVars, err := GetProviderEnvVars(store)
if err != nil {
return nil, err
}
envVars = append(envVars, providerEnvVars...)
return envVars, nil
}