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configure.go
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configure.go
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package storage
import (
"fmt"
"path"
"github.com/ViaQ/logerr/v2/kverrors"
"github.com/imdario/mergo"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/utils/pointer"
lokiv1 "github.com/grafana/loki/operator/apis/loki/v1"
)
// ConfigureDeployment appends additional pod volumes and container env vars, args, volume mounts
// based on the object storage type. Currently supported amendments:
// - All: Ensure object storage secret mounted and auth projected as env vars.
// - GCS: Ensure env var GOOGLE_APPLICATION_CREDENTIALS in container
// - S3: Ensure mounting custom CA configmap if any TLSConfig given
func ConfigureDeployment(d *appsv1.Deployment, opts Options) error {
switch opts.SharedStore {
case lokiv1.ObjectStorageSecretAlibabaCloud, lokiv1.ObjectStorageSecretAzure, lokiv1.ObjectStorageSecretGCS, lokiv1.ObjectStorageSecretSwift:
return configureDeployment(d, opts)
case lokiv1.ObjectStorageSecretS3:
err := configureDeployment(d, opts)
if err != nil {
return err
}
return configureDeploymentCA(d, opts.TLS)
default:
return nil
}
}
// ConfigureStatefulSet appends additional pod volumes and container env vars, args, volume mounts
// based on the object storage type. Currently supported amendments:
// - All: Ensure object storage secret mounted and auth projected as env vars.
// - GCS: Ensure env var GOOGLE_APPLICATION_CREDENTIALS in container
// - S3: Ensure mounting custom CA configmap if any TLSConfig given
func ConfigureStatefulSet(d *appsv1.StatefulSet, opts Options) error {
switch opts.SharedStore {
case lokiv1.ObjectStorageSecretAlibabaCloud, lokiv1.ObjectStorageSecretAzure, lokiv1.ObjectStorageSecretGCS, lokiv1.ObjectStorageSecretSwift:
return configureStatefulSet(d, opts)
case lokiv1.ObjectStorageSecretS3:
if err := configureStatefulSet(d, opts); err != nil {
return err
}
return configureStatefulSetCA(d, opts.TLS)
default:
return nil
}
}
// ConfigureDeployment merges the object storage secret volume into the deployment spec.
// With this, the deployment will expose credentials specific environment variables.
func configureDeployment(d *appsv1.Deployment, opts Options) error {
p := ensureObjectStoreCredentials(&d.Spec.Template.Spec, opts)
if err := mergo.Merge(&d.Spec.Template.Spec, p, mergo.WithOverride); err != nil {
return kverrors.Wrap(err, "failed to merge gcs object storage spec ")
}
return nil
}
// ConfigureDeploymentCA merges a S3 CA ConfigMap volume into the deployment spec.
func configureDeploymentCA(d *appsv1.Deployment, tls *TLSConfig) error {
if tls == nil {
return nil
}
p := ensureCAForS3(&d.Spec.Template.Spec, tls)
if err := mergo.Merge(&d.Spec.Template.Spec, p, mergo.WithOverride); err != nil {
return kverrors.Wrap(err, "failed to merge s3 object storage ca options ")
}
return nil
}
// ConfigureStatefulSet merges a the object storage secrect volume into the statefulset spec.
// With this, the statefulset will expose credentials specific environment variable.
func configureStatefulSet(s *appsv1.StatefulSet, opts Options) error {
p := ensureObjectStoreCredentials(&s.Spec.Template.Spec, opts)
if err := mergo.Merge(&s.Spec.Template.Spec, p, mergo.WithOverride); err != nil {
return kverrors.Wrap(err, "failed to merge gcs object storage spec ")
}
return nil
}
// ConfigureStatefulSetCA merges a S3 CA ConfigMap volume into the statefulset spec.
func configureStatefulSetCA(s *appsv1.StatefulSet, tls *TLSConfig) error {
if tls == nil {
return nil
}
p := ensureCAForS3(&s.Spec.Template.Spec, tls)
if err := mergo.Merge(&s.Spec.Template.Spec, p, mergo.WithOverride); err != nil {
return kverrors.Wrap(err, "failed to merge s3 object storage ca options ")
}
return nil
}
func ensureObjectStoreCredentials(p *corev1.PodSpec, opts Options) corev1.PodSpec {
envVarFromSecret := func(name, secretName, secretKey string) corev1.EnvVar {
return corev1.EnvVar{
Name: name,
ValueFrom: &corev1.EnvVarSource{
SecretKeyRef: &corev1.SecretKeySelector{
LocalObjectReference: corev1.LocalObjectReference{
Name: secretName,
},
Key: secretKey,
},
},
}
}
container := p.Containers[0].DeepCopy()
volumes := p.Volumes
secretName := opts.SecretName
storeType := opts.SharedStore
volumes = append(volumes, corev1.Volume{
Name: secretName,
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: secretName,
},
},
})
container.VolumeMounts = append(container.VolumeMounts, corev1.VolumeMount{
Name: secretName,
ReadOnly: false,
MountPath: secretDirectory,
})
if wifEnabled(opts) {
volumes = append(volumes, saTokenVolume(opts))
container.VolumeMounts = append(container.VolumeMounts, saTokenVolumeMount(opts))
}
var storeEnvVars []corev1.EnvVar
switch storeType {
case lokiv1.ObjectStorageSecretAlibabaCloud:
storeEnvVars = []corev1.EnvVar{
envVarFromSecret(EnvAlibabaCloudAccessKeyID, secretName, KeyAlibabaCloudAccessKeyID),
envVarFromSecret(EnvAlibabaCloudAccessKeySecret, secretName, KeyAlibabaCloudSecretAccessKey),
}
case lokiv1.ObjectStorageSecretAzure:
storeEnvVars = []corev1.EnvVar{
envVarFromSecret(EnvAzureStorageAccountName, secretName, KeyAzureStorageAccountName),
envVarFromSecret(EnvAzureStorageAccountKey, secretName, KeyAzureStorageAccountKey),
}
case lokiv1.ObjectStorageSecretGCS:
storeEnvVars = []corev1.EnvVar{
{
Name: EnvGoogleApplicationCredentials,
Value: path.Join(secretDirectory, KeyGCPServiceAccountKeyFilename),
},
}
case lokiv1.ObjectStorageSecretS3:
storeEnvVars = []corev1.EnvVar{
envVarFromSecret(EnvAWSAccessKeyID, secretName, KeyAWSAccessKeyID),
envVarFromSecret(EnvAWSAccessKeySecret, secretName, KeyAWSAccessKeySecret),
}
// STS Auth Workflow
if wifEnabled(opts) {
storeEnvVars = []corev1.EnvVar{
envVarFromSecret(EnvAWSRoleArn, secretName, KeyAWSRoleArn),
// TODO (JoaoBraveCoding) fix
envVarFromSecret(EnvAWSWebIdentityTokenFile, secretName, KeyAWSAccessKeySecret),
}
}
if opts.S3 != nil && opts.S3.SSE.Type == SSEKMSType && opts.S3.SSE.KMSEncryptionContext != "" {
storeEnvVars = append(storeEnvVars, envVarFromSecret(EnvAWSSseKmsEncryptionContext, secretName, EnvAWSSseKmsEncryptionContext))
}
case lokiv1.ObjectStorageSecretSwift:
storeEnvVars = []corev1.EnvVar{
envVarFromSecret(EnvSwiftUsername, secretName, KeySwiftUsername),
envVarFromSecret(EnvSwiftPassword, secretName, KeySwiftPassword),
}
}
container.Env = append(container.Env, storeEnvVars...)
return corev1.PodSpec{
Containers: []corev1.Container{
*container,
},
Volumes: volumes,
}
}
func ensureCAForS3(p *corev1.PodSpec, tls *TLSConfig) corev1.PodSpec {
container := p.Containers[0].DeepCopy()
volumes := p.Volumes
volumes = append(volumes, corev1.Volume{
Name: storageTLSVolume,
VolumeSource: corev1.VolumeSource{
ConfigMap: &corev1.ConfigMapVolumeSource{
LocalObjectReference: corev1.LocalObjectReference{
Name: tls.CA,
},
},
},
})
container.VolumeMounts = append(container.VolumeMounts, corev1.VolumeMount{
Name: storageTLSVolume,
ReadOnly: false,
MountPath: caDirectory,
})
container.Args = append(container.Args,
fmt.Sprintf("-s3.http.ca-file=%s", path.Join(caDirectory, tls.Key)),
)
return corev1.PodSpec{
Containers: []corev1.Container{
*container,
},
Volumes: volumes,
}
}
func wifEnabled(opts Options) bool {
storeType := opts.SharedStore
switch storeType {
case lokiv1.ObjectStorageSecretS3:
return opts.S3 != nil && opts.S3.RoleArn == ""
default:
return false
}
}
func saTokenVolumeMount(opts Options) corev1.VolumeMount {
var wiToken string
storeType := opts.SharedStore
switch storeType {
case lokiv1.ObjectStorageSecretS3:
wiToken = opts.S3.WebIdentityTokenFile
}
return corev1.VolumeMount{
Name: saTokenVolumeName,
MountPath: wiToken,
}
}
func saTokenVolume(opts Options) corev1.Volume {
var audience string
storeType := opts.SharedStore
switch storeType {
case lokiv1.ObjectStorageSecretS3:
audience = opts.S3.Audience
}
return corev1.Volume{
Name: saTokenVolumeName,
VolumeSource: corev1.VolumeSource{
Projected: &corev1.ProjectedVolumeSource{
Sources: []corev1.VolumeProjection{
{
ServiceAccountToken: &corev1.ServiceAccountTokenProjection{
ExpirationSeconds: pointer.Int64(saTokenExpiration),
Path: corev1.ServiceAccountTokenKey,
Audience: audience,
},
},
},
},
},
}
}