mirror of
https://github.com/kubernetes/kubernetes.git
synced 2026-08-05 22:50:24 +00:00
f451aa0762
Migrate the kubelet (and the kube-proxy conntrack helper) off the full github.com/google/cadvisor module onto the lean github.com/google/cadvisor/lib: repoint info/v1+info/v2 type usage to lib/model and the manager/fs/cache/etc. consumers to lib/*; regenerate the cadvisor.Interface mocks; keep the kubelet-pinned cAdvisor global flags via lib/cadvisorflags. go.mod: require + replace github.com/google/cadvisor/lib (=> the dims/cadvisor/lib fork for now, until lib is tagged) and drop the full github.com/google/cadvisor module entirely; keep github.com/containerd/containerd/api at v1.11.0 (matching upstream master); add github.com/google/cadvisor to unwanted-dependencies.json unwantedModules so the full module cannot be re-vendored. test/e2e_node: the one remaining consumer of the full module -- the node-e2e ResourceCollector, which used the v2 HTTP client (client/v2) + v2 API types (info/v2) -- now scrapes the standalone cAdvisor pod's /api/v2.1/stats directly over HTTP+JSON, so test/e2e_node depends on no cAdvisor package. No change to the kubelet's stats surfaces.
117 lines
3.5 KiB
Go
117 lines
3.5 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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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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package fs
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import (
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"errors"
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"fmt"
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"sync"
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mount "github.com/moby/sys/mountinfo"
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"k8s.io/klog/v2"
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)
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// FsPlugin provides filesystem-specific statistics collection.
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type FsPlugin interface {
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// Name returns the plugin identifier (e.g., "zfs", "devicemapper", "vfs").
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Name() string
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// CanHandle returns true if this plugin handles the given filesystem type.
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CanHandle(fsType string) bool
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// Priority returns the plugin priority (higher = checked first).
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// Allows specific plugins (zfs, btrfs) to override generic (vfs).
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Priority() int
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// GetStats returns filesystem statistics for a partition.
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GetStats(device string, partition PartitionInfo) (*FsStats, error)
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// ProcessMount optionally modifies mount info during processing.
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// Returns (shouldInclude bool, modifiedMount *mount.Info, error).
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ProcessMount(mnt *mount.Info) (bool, *mount.Info, error)
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}
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// FsCachingPlugin is an optional interface for plugins that want to cache
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// stats by a key (e.g., device ID) to avoid redundant stat calls.
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// This is useful for network filesystems like NFS where multiple mounts
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// may point to the same underlying device.
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type FsCachingPlugin interface {
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FsPlugin
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// CacheKey returns a cache key for the given partition.
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// Stats will be cached by this key and reused for partitions with the same key.
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// Return empty string to disable caching for a specific partition.
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CacheKey(partition PartitionInfo) string
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}
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// PartitionInfo contains information needed for stats collection.
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type PartitionInfo struct {
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Mountpoint string
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Major uint
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Minor uint
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FsType string
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BlockSize uint
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}
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// FsStats contains filesystem statistics returned by plugins.
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type FsStats struct {
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Capacity uint64
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Free uint64
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Available uint64
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Inodes *uint64
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InodesFree *uint64
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Type FsType
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}
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// ErrFallbackToVFS signals that a specialized plugin cannot handle
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// this filesystem and VFS should be used instead.
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var ErrFallbackToVFS = errors.New("fallback to VFS")
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// Plugin registry (init-time registration only).
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var (
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pluginsLock sync.RWMutex
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plugins = make(map[string]FsPlugin)
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)
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// RegisterPlugin registers a filesystem plugin.
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// This should be called from init() functions.
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func RegisterPlugin(name string, plugin FsPlugin) error {
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pluginsLock.Lock()
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defer pluginsLock.Unlock()
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if _, found := plugins[name]; found {
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return fmt.Errorf("FsPlugin %q was registered twice", name)
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}
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klog.V(4).Infof("Registered FsPlugin %q", name)
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plugins[name] = plugin
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return nil
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}
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// GetPluginForFsType returns the appropriate plugin for the filesystem type.
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// Returns nil if no plugin can handle the filesystem type.
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func GetPluginForFsType(fsType string) FsPlugin {
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pluginsLock.RLock()
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defer pluginsLock.RUnlock()
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var best FsPlugin
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for _, p := range plugins {
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if p.CanHandle(fsType) {
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if best == nil || p.Priority() > best.Priority() {
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best = p
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}
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}
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}
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return best
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}
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