fix(api): Don't send responses twice.
In some cases multiple responses are being sent for one request, causing
the API server to incorrectly drop connections.
This change introduces a ResponseWriter which tracks whether a
response has already been sent. This is used to prevent a response being
sent if something already has (e.g. by a preconditions check function).
Fixes#21633.
Co-authored-by: Menno Finlay-Smits <hello@menno.io>
When listing objects with metadata, avoid returning an "expires" time
metadata value when its value is the zero time as this means that no
expires value is set on the object.
This change uses the updated ldap library in minio/pkg (bumped
up to v3). A new config parameter is added for LDAP configuration to
specify extra user attributes to load from the LDAP server and to store
them as additional claims for the user.
A test is added in sts_handlers.go that shows how to access the LDAP
attributes as a claim.
This is in preparation for adding SSH pubkey authentication to MinIO's SFTP
integration.
```
==================
WARNING: DATA RACE
Read at 0x0000082be990 by goroutine 205:
github.com/minio/minio/cmd.setCommonHeaders()
Previous write at 0x0000082be990 by main goroutine:
github.com/minio/minio/cmd.lookupConfigs()
```
Recent Veeam is very picky about storage class names. Add `_MINIO_VEEAM_FORCE_SC` env var.
It will override the storage class returned by the storage backend if it is non-standard
and we detect a Veeam client by checking the User Agent.
Applies to HeadObject/GetObject/ListObject*
Create new code paths for multiple subsystems in the code. This will
make maintaing this easier later.
Also introduce bugLogIf() for errors that should not happen in the first
place.
Add a new function logger.Event() to send the log to Console and
http/kafka log webhooks. This will include some internal events such as
disk healing and rebalance/decommissioning
Optionally allows customers to enable
- Enable an external cache to catch GET/HEAD responses
- Enable skipping disks that are slow to respond in GET/HEAD
when we have already achieved a quorum
globalDeploymentID was being read while it was being set.
Fixes race:
```
WARNING: DATA RACE
Write at 0x0000079605a0 by main goroutine:
github.com/minio/minio/cmd.connectLoadInitFormats()
github.com/minio/minio/cmd/prepare-storage.go:269 +0x14f0
github.com/minio/minio/cmd.waitForFormatErasure()
github.com/minio/minio/cmd/prepare-storage.go:294 +0x21d
...
Previous read at 0x0000079605a0 by goroutine 105:
github.com/minio/minio/cmd.newContext()
github.com/minio/minio/cmd/utils.go:817 +0x31e
github.com/minio/minio/cmd.adminMiddleware.func1()
github.com/minio/minio/cmd/admin-router.go:110 +0x96
net/http.HandlerFunc.ServeHTTP()
net/http/server.go:2136 +0x47
github.com/minio/minio/cmd.setBucketForwardingMiddleware.func1()
github.com/minio/minio/cmd/generic-handlers.go:460 +0xb1a
net/http.HandlerFunc.ServeHTTP()
net/http/server.go:2136 +0x47
...
```
* Reduce allocations
* Add stringsHasPrefixFold which can compare string prefixes, while ignoring case and not allocating.
* Reuse all msgp.Readers
* Reuse metadata buffers when not reading data.
* Make type safe. Make buffer 4K instead of 8.
* Unslice
If an invalid status code is generated from an error we risk panicking. Even if there
are no potential problems at the moment we should prevent this in the future.
Add safeguards against this.
Sample trace:
```
May 02 06:41:39 minio[52806]: panic: "GET /20180401230655.PDF": invalid WriteHeader code 0
May 02 06:41:39 minio[52806]: goroutine 16040430822 [running]:
May 02 06:41:39 minio[52806]: runtime/debug.Stack(0xc01fff7c20, 0x25c4b00, 0xc0490e4080)
May 02 06:41:39 minio[52806]: runtime/debug/stack.go:24 +0x9f
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd.setCriticalErrorHandler.func1.1(0xc022048800, 0x4f38ab0, 0xc0406e0fc0)
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd/generic-handlers.go:469 +0x85
May 02 06:41:39 minio[52806]: panic(0x25c4b00, 0xc0490e4080)
May 02 06:41:39 minio[52806]: runtime/panic.go:965 +0x1b9
May 02 06:41:39 minio[52806]: net/http.checkWriteHeaderCode(...)
May 02 06:41:39 minio[52806]: net/http/server.go:1092
May 02 06:41:39 minio[52806]: net/http.(*response).WriteHeader(0xc0406e0fc0, 0x0)
May 02 06:41:39 minio[52806]: net/http/server.go:1126 +0x718
May 02 06:41:39 minio[52806]: github.com/minio/minio/internal/logger.(*ResponseWriter).WriteHeader(0xc032fa3ea0, 0x0)
May 02 06:41:39 minio[52806]: github.com/minio/minio/internal/logger/audit.go:116 +0xb1
May 02 06:41:39 minio[52806]: github.com/minio/minio/internal/logger.(*ResponseWriter).WriteHeader(0xc032fa3f40, 0x0)
May 02 06:41:39 minio[52806]: github.com/minio/minio/internal/logger/audit.go:116 +0xb1
May 02 06:41:39 minio[52806]: github.com/minio/minio/internal/logger.(*ResponseWriter).WriteHeader(0xc002ce8000, 0x0)
May 02 06:41:39 minio[52806]: github.com/minio/minio/internal/logger/audit.go:116 +0xb1
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd.writeResponse(0x4f364a0, 0xc002ce8000, 0x0, 0xc0443b86c0, 0x1cb, 0x224, 0x2a9651e, 0xf)
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd/api-response.go:736 +0x18d
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd.writeErrorResponse(0x4f44218, 0xc069086ae0, 0x4f364a0, 0xc002ce8000, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc00656afc0)
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd/api-response.go:798 +0x306
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd.objectAPIHandlers.getObjectHandler(0x4b73768, 0x4b73730, 0x4f44218, 0xc069086ae0, 0x4f82090, 0xc002d80620, 0xc040e03885, 0xe, 0xc040e03894, 0x61, ...)
May 02 06:41:39 minio[52806]: github.com/minio/minio/cmd/object-handlers.go:456 +0x252c
```
- New sub-system has "region" and "name" fields.
- `region` subsystem is marked as deprecated, however still works, unless the
new region parameter under `site` is set - in this case, the region subsystem is
ignored. `region` subsystem is hidden from top-level help (i.e. from `mc admin
config set myminio`), but appears when specifically requested (i.e. with `mc
admin config set myminio region`).
- MINIO_REGION, MINIO_REGION_NAME are supported as legacy environment variables for server region.
- Adds MINIO_SITE_REGION as the current environment variable to configure the
server region and MINIO_SITE_NAME for the site name.
This feature also changes the default port where
the browser is running, now the port has moved
to 9001 and it can be configured with
```
--console-address ":9001"
```
This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`
