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s3.go
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s3.go
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package aws
import (
"bytes"
"context"
"errors"
"text/template"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/aws/aws-sdk-go-v2/service/s3/types"
"github.com/aws/smithy-go"
"github.com/go-logr/logr"
"github.com/giantswarm/object-storage-operator/api/v1alpha1"
)
type S3ObjectStorageAdapter struct {
s3Client *s3.Client
logger logr.Logger
cluster AWSCluster
bucketPolicyTemplate *template.Template
}
func NewS3Service(s3Client *s3.Client, logger logr.Logger, cluster AWSCluster) S3ObjectStorageAdapter {
bucketPolicyTemplate, err := template.New("bucketPolicy").Parse(bucketPolicy)
if err != nil {
panic(err)
}
return S3ObjectStorageAdapter{
s3Client: s3Client,
logger: logger,
cluster: cluster,
bucketPolicyTemplate: bucketPolicyTemplate,
}
}
func (s S3ObjectStorageAdapter) ExistsBucket(ctx context.Context, bucket *v1alpha1.Bucket) (bool, error) {
_, err := s.s3Client.HeadBucket(ctx, &s3.HeadBucketInput{
Bucket: aws.String(bucket.Spec.Name),
})
exists := true
if err != nil {
var apiError smithy.APIError
if errors.As(err, &apiError) {
switch apiError.(type) {
case *types.NotFound:
exists = false
err = nil
}
}
}
return exists, err
}
func (s S3ObjectStorageAdapter) CreateBucket(ctx context.Context, bucket *v1alpha1.Bucket) error {
_, err := s.s3Client.CreateBucket(ctx, &s3.CreateBucketInput{
Bucket: aws.String(bucket.Spec.Name),
CreateBucketConfiguration: &types.CreateBucketConfiguration{
LocationConstraint: types.BucketLocationConstraint(s.cluster.GetRegion()),
},
})
return err
}
func (s S3ObjectStorageAdapter) DeleteBucket(ctx context.Context, bucket *v1alpha1.Bucket) error {
_, err := s.s3Client.DeleteBucket(ctx, &s3.DeleteBucketInput{
Bucket: aws.String(bucket.Spec.Name),
})
return err
}
func (s S3ObjectStorageAdapter) ConfigureBucket(ctx context.Context, bucket *v1alpha1.Bucket) error {
var err error
// If expiration is not set, we remove all lifecycle rules
err = s.setLifecycleRules(ctx, bucket)
if err != nil {
return err
}
// Set the bucket policy (enforce encryption in transit)
err = s.setBucketPolicy(ctx, bucket)
if err != nil {
return err
}
err = s.setTags(ctx, bucket)
return err
}
func (s S3ObjectStorageAdapter) setLifecycleRules(ctx context.Context, bucket *v1alpha1.Bucket) error {
if bucket.Spec.ExpirationPolicy != nil {
enabledRuleStatus := types.ExpirationStatusEnabled
lifecycleConfiguration := types.BucketLifecycleConfiguration{
Rules: []types.LifecycleRule{
{
Status: enabledRuleStatus,
ID: aws.String("Expiration"),
Filter: &types.LifecycleRuleFilterMemberPrefix{Value: ""},
Expiration: &types.LifecycleExpiration{
Days: &bucket.Spec.ExpirationPolicy.Days,
},
},
},
}
input := &s3.PutBucketLifecycleConfigurationInput{
Bucket: aws.String(bucket.Spec.Name),
LifecycleConfiguration: &lifecycleConfiguration,
}
_, err := s.s3Client.PutBucketLifecycleConfiguration(ctx, input)
return err
}
_, err := s.s3Client.DeleteBucketLifecycle(ctx, &s3.DeleteBucketLifecycleInput{
Bucket: aws.String(bucket.Spec.Name),
})
return err
}
func (s S3ObjectStorageAdapter) setBucketPolicy(ctx context.Context, bucket *v1alpha1.Bucket) error {
var policy bytes.Buffer
err := s.bucketPolicyTemplate.Execute(&policy, BucketPolicyData{bucket.Spec.Name})
if err != nil {
return err
}
_, err = s.s3Client.PutBucketPolicy(ctx, &s3.PutBucketPolicyInput{
Bucket: aws.String(bucket.Spec.Name),
Policy: aws.String(policy.String()),
})
return err
}
func (s S3ObjectStorageAdapter) setTags(ctx context.Context, bucket *v1alpha1.Bucket) error {
tags := make([]types.Tag, 0)
for _, t := range bucket.Spec.Tags {
// We use this to avoid pointer issues in range loops.
tag := t
if tag.Key != "" && tag.Value != "" {
tags = append(tags, types.Tag{Key: &tag.Key, Value: &tag.Value})
}
}
for k, v := range s.cluster.GetTags() {
// We use this to avoid pointer issues in range loops.
key := k
value := v
if key != "" && value != "" {
tags = append(tags, types.Tag{Key: &key, Value: &value})
}
}
_, err := s.s3Client.PutBucketTagging(ctx, &s3.PutBucketTaggingInput{
Bucket: aws.String(bucket.Spec.Name),
Tagging: &types.Tagging{
TagSet: tags,
},
})
return err
}