mirror of
https://github.com/hanzoai/volume.git
synced 2026-10-01 00:48:00 +00:00
zeekay
b61441f7d7
A fork of Rancher's local-path-provisioner at v0.0.36. The behaviour is unchanged and deliberately so — a directory on the node a pod lands on is the right thing for a disk. What changes is identity. The provisioner answers to hanzo.ai/volume rather than rancher.io/local-path. That is not branding: two provisioners sharing one name race for the same claims, and a stock k3s carries the upstream one, so a cluster running both would settle our storage by chance. Data lives at /var/lib/hanzo/volume, so reading a Hanzo cluster does not mean learning another vendor's directory. Apache-2.0 as published, unaltered, with Rancher's attribution in NOTICE. The README says what this is not: durability. A volume here dies with its node. That is hanzoai/replicate's question, one layer up, and keeping the two apart is what lets the disk stay this simple.
86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
// Copyright 2017 The Prometheus 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 procfs
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// A BuddyInfo is the details parsed from /proc/buddyinfo.
|
|
// The data is comprised of an array of free fragments of each size.
|
|
// The sizes are 2^n*PAGE_SIZE, where n is the array index.
|
|
type BuddyInfo struct {
|
|
Node string
|
|
Zone string
|
|
Sizes []float64
|
|
}
|
|
|
|
// BuddyInfo reads the buddyinfo statistics from the specified `proc` filesystem.
|
|
func (fs FS) BuddyInfo() ([]BuddyInfo, error) {
|
|
file, err := os.Open(fs.proc.Path("buddyinfo"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
|
|
return parseBuddyInfo(file)
|
|
}
|
|
|
|
func parseBuddyInfo(r io.Reader) ([]BuddyInfo, error) {
|
|
var (
|
|
buddyInfo = []BuddyInfo{}
|
|
scanner = bufio.NewScanner(r)
|
|
bucketCount = -1
|
|
)
|
|
|
|
for scanner.Scan() {
|
|
var err error
|
|
line := scanner.Text()
|
|
parts := strings.Fields(line)
|
|
|
|
if len(parts) < 4 {
|
|
return nil, fmt.Errorf("%w: Invalid number of fields, found: %v", ErrFileParse, parts)
|
|
}
|
|
|
|
node := strings.TrimSuffix(parts[1], ",")
|
|
zone := strings.TrimSuffix(parts[3], ",")
|
|
arraySize := len(parts[4:])
|
|
|
|
if bucketCount == -1 {
|
|
bucketCount = arraySize
|
|
} else {
|
|
if bucketCount != arraySize {
|
|
return nil, fmt.Errorf("%w: mismatch in number of buddyinfo buckets, previous count %d, new count %d", ErrFileParse, bucketCount, arraySize)
|
|
}
|
|
}
|
|
|
|
sizes := make([]float64, arraySize)
|
|
for i := 0; i < arraySize; i++ {
|
|
sizes[i], err = strconv.ParseFloat(parts[i+4], 64)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%w: Invalid valid in buddyinfo: %f: %w", ErrFileParse, sizes[i], err)
|
|
}
|
|
}
|
|
|
|
buddyInfo = append(buddyInfo, BuddyInfo{node, zone, sizes})
|
|
}
|
|
|
|
return buddyInfo, scanner.Err()
|
|
}
|