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Allow synchronous replication if enabled. (#11165)

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Synchronous replication can be enabled by setting the --sync
flag while adding a remote replication target.

This PR also adds proxying on GET/HEAD to another node in a
active-active replication setup in the event of a 404 on the current node.
This commit is contained in:
Poorna Krishnamoorthy
2021-01-11 22:36:51 -08:00
committed by GitHub
parent 317305d5f9
commit 7824e19d20
14 changed files with 347 additions and 100 deletions
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8
docs/bucket/replication/README.md
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@@ -130,6 +130,7 @@ It is recommended that replication be run in a system with atleast two CPU's ava
![head](https://raw.githubusercontent.com/minio/minio/master/docs/bucket/replication/HEAD_bucket_replication.png)
## MinIO Extension
### Replicating Deletes
Delete marker replication is allowed in [AWS V1 Configuration](https://aws.amazon.com/blogs/storage/managing-delete-marker-replication-in-amazon-s3/) but not in V2 configuration. The MinIO implementation above is based on V2 configuration, however it has been extended to allow both DeleteMarker replication and replication of versioned deletes with the `DeleteMarkerReplication` and `DeleteReplication` fields in the replication configuration above. By default, this is set to `Disabled` unless the user specifies it while adding a replication rule.
When an object is deleted from the source bucket, the corresponding replica version will be marked deleted if delete marker replication is enabled in the replication configuration. Replication of deletes that specify a version id (a.k.a hard deletes) can be enabled by setting the `DeleteReplication` status to enabled in the replication configuration. This is a MinIO specific extension that can be enabled using the `mc replicate add` or `mc replicate edit` command with the --replicate "delete" flag.
@@ -154,6 +155,13 @@ The status of replication can be monitored by configuring event notifications on
On the target bucket, `s3:PutObject` event shows `X-Amz-Replication-Status` status of `REPLICA` in the metadata. Additional metrics to monitor backlog state for the purpose of bandwidth management and resource allocation are
an upcoming feature.
### Sync/Async Replication
By default, replication is completed asynchronously. If synchronous replication is desired, set the --sync flag while adding a
remote replication target using the `mc admin bucket remote add` command
```
mc admin bucket remote add myminio/srcbucket https://accessKey:secretKey@replica-endpoint:9000/destbucket --service replication --region us-east-1 --sync --healthcheck-seconds 100s
```
## Explore Further
- [MinIO Bucket Versioning Implementation](https://docs.minio.io/docs/minio-bucket-versioning-guide.html)
- [MinIO Client Quickstart Guide](https://docs.minio.io/docs/minio-client-quickstart-guide.html)