unkin-agent
9da206dc7c
PVCs and CloudNativePG Clusters need S3 buckets and backup schedules
provisioned consistently. This operator watches the
backups.unkin.net/{schedule,destination} annotations on those objects and
provisions everything needed to back them up, with no new CRDs.
- Add a PVC controller that provisions cephrgw ObjectStoreUser/Bucket/BucketAccess,
auto-generates a restic repo-password Secret and creates a k8up Schedule scoped
to the PVC via spec.backup.volumes[].persistentVolumeClaim.claimName.
- Add a CNPG Cluster controller that provisions the same bucket stack, idempotently
patches spec.backup.barmanObjectStore (leaving a user-set destinationPath alone
with a Warning event) and creates a ScheduledBackup.
- Resolve destinations through a ConfigMap lookup table; requeue until the
BucketAccess is Ready before creating schedule resources; own-reference created
resources and retain bucket data by default.
- Add schedule-mapping helpers (k8up 5-field/shortcut pass-through, CNPG 6-field
seconds-first) and deterministic, length-bounded name derivation.
- Add unit tests (schedule mapping, name derivation, destination resolution) and
envtest controller tests for both paths, wiring the external CRDs into envtest.
- Add kubebuilder-generated RBAC, a Dockerfile (distroless/nonroot), Woodpecker
lint/test/build pipelines and a tag-triggered image push to the artifactapi
docker-internal registry, plus a version-bump Makefile and deploy manifests.
77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
/*
|
|
Copyright 2022 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package runtime
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
// AllocatorPool simply stores Allocator objects to avoid additional memory allocations
|
|
// by caching created but unused items for later reuse, relieving pressure on the garbage collector.
|
|
//
|
|
// Usage:
|
|
//
|
|
// memoryAllocator := runtime.AllocatorPool.Get().(*runtime.Allocator)
|
|
// defer runtime.AllocatorPool.Put(memoryAllocator)
|
|
//
|
|
// A note for future:
|
|
//
|
|
// consider introducing multiple pools for storing buffers of different sizes
|
|
// perhaps this could allow us to be more efficient.
|
|
var AllocatorPool = sync.Pool{
|
|
New: func() interface{} {
|
|
return &Allocator{}
|
|
},
|
|
}
|
|
|
|
// Allocator knows how to allocate memory
|
|
// It exists to make the cost of object serialization cheaper.
|
|
// In some cases, it allows for allocating memory only once and then reusing it.
|
|
// This approach puts less load on GC and leads to less fragmented memory in general.
|
|
type Allocator struct {
|
|
buf []byte
|
|
}
|
|
|
|
var _ MemoryAllocator = &Allocator{}
|
|
|
|
// Allocate reserves memory for n bytes only if the underlying array doesn't have enough capacity
|
|
// otherwise it returns previously allocated block of memory.
|
|
//
|
|
// Note that the returned array is not zeroed, it is the caller's
|
|
// responsibility to clean the memory if needed.
|
|
func (a *Allocator) Allocate(n uint64) []byte {
|
|
if uint64(cap(a.buf)) >= n {
|
|
a.buf = a.buf[:n]
|
|
return a.buf
|
|
}
|
|
// grow the buffer
|
|
size := uint64(2*cap(a.buf)) + n
|
|
a.buf = make([]byte, size)
|
|
a.buf = a.buf[:n]
|
|
return a.buf
|
|
}
|
|
|
|
// SimpleAllocator a wrapper around make([]byte)
|
|
// conforms to the MemoryAllocator interface
|
|
type SimpleAllocator struct{}
|
|
|
|
var _ MemoryAllocator = &SimpleAllocator{}
|
|
|
|
func (sa *SimpleAllocator) Allocate(n uint64) []byte {
|
|
return make([]byte, n)
|
|
}
|