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.
51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
// Copyright 2018 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build (linux || darwin) && !appengine
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// +build linux darwin
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// +build !appengine
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package util
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import (
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"bytes"
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"os"
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"syscall"
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)
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// SysReadFile is a simplified os.ReadFile that invokes syscall.Read directly.
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// https://github.com/prometheus/node_exporter/pull/728/files
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//
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// Note that this function will not read files larger than 128 bytes.
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func SysReadFile(file string) (string, error) {
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f, err := os.Open(file)
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if err != nil {
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return "", err
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}
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defer f.Close()
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// On some machines, hwmon drivers are broken and return EAGAIN. This causes
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// Go's os.ReadFile implementation to poll forever.
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//
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// Since we either want to read data or bail immediately, do the simplest
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// possible read using syscall directly.
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const sysFileBufferSize = 128
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b := make([]byte, sysFileBufferSize)
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n, err := syscall.Read(int(f.Fd()), b)
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if err != nil {
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return "", err
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}
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return string(bytes.TrimSpace(b[:n])), nil
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}
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