* Move snapshot structs and functions into pkg/etcd/snapshot
* Move s3 client code and functions into pkg/etcd/s3
* Refactor pkg/etcd to track snapshot and s3 moves
* Add support for reading s3 client config from secret
* Add minio client cache, since S3 client configuration can now be
changed at runtime by modifying the secret, and don't want to have to
create a new minio client every time we read config.
* Add tests for pkg/etcd/s3
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
If a full reconcile wins the race against sync of an individual snapshot resource, or someone intentionally deletes the configmap, the data map could be nil and cause a crash.
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
Omit snapshot list configmap entries for snapshots without extra metadata; reduce log level of warnings about missing s3 metadata files.
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
Silences error message from lasso - this is a normal startup condition
when no snapshots exist so we shouldn't log nasty looking errors.
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
