mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-27 06:29:50 -08:00
301 lines
9.1 KiB
Go
301 lines
9.1 KiB
Go
// Copyright 2017 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 !noxfs
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// +build !noxfs
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package collector
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import (
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"fmt"
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"github.com/go-kit/log"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/procfs/xfs"
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)
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// An xfsCollector is a Collector which gathers metrics from XFS filesystems.
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type xfsCollector struct {
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fs xfs.FS
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logger log.Logger
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}
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func init() {
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registerCollector("xfs", defaultEnabled, NewXFSCollector)
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}
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// NewXFSCollector returns a new Collector exposing XFS statistics.
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func NewXFSCollector(logger log.Logger) (Collector, error) {
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fs, err := xfs.NewFS(*procPath, *sysPath)
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if err != nil {
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return nil, fmt.Errorf("failed to open sysfs: %w", err)
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}
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return &xfsCollector{
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fs: fs,
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logger: logger,
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}, nil
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}
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// Update implements Collector.
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func (c *xfsCollector) Update(ch chan<- prometheus.Metric) error {
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stats, err := c.fs.SysStats()
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if err != nil {
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return fmt.Errorf("failed to retrieve XFS stats: %w", err)
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}
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for _, s := range stats {
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c.updateXFSStats(ch, s)
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}
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return nil
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}
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// updateXFSStats collects statistics for a single XFS filesystem.
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func (c *xfsCollector) updateXFSStats(ch chan<- prometheus.Metric, s *xfs.Stats) {
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const (
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subsystem = "xfs"
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)
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var (
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labels = []string{"device"}
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)
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// Metric names and descriptions are sourced from:
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// http://xfs.org/index.php/Runtime_Stats.
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//
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// Each metric has a name that roughly follows the pattern of
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// "node_xfs_category_value_total", using the categories and value names
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// found on the XFS wiki.
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//
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// Note that statistics for more than one internal B-tree are measured,
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// and as such, each one must be differentiated by name.
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metrics := []struct {
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name string
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desc string
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value float64
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}{
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{
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name: "extent_allocation_extents_allocated_total",
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desc: "Number of extents allocated for a filesystem.",
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value: float64(s.ExtentAllocation.ExtentsAllocated),
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},
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{
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name: "extent_allocation_blocks_allocated_total",
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desc: "Number of blocks allocated for a filesystem.",
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value: float64(s.ExtentAllocation.BlocksAllocated),
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},
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{
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name: "extent_allocation_extents_freed_total",
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desc: "Number of extents freed for a filesystem.",
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value: float64(s.ExtentAllocation.ExtentsFreed),
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},
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{
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name: "extent_allocation_blocks_freed_total",
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desc: "Number of blocks freed for a filesystem.",
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value: float64(s.ExtentAllocation.BlocksFreed),
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},
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{
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name: "allocation_btree_lookups_total",
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desc: "Number of allocation B-tree lookups for a filesystem.",
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value: float64(s.AllocationBTree.Lookups),
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},
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{
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name: "allocation_btree_compares_total",
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desc: "Number of allocation B-tree compares for a filesystem.",
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value: float64(s.AllocationBTree.Compares),
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},
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{
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name: "allocation_btree_records_inserted_total",
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desc: "Number of allocation B-tree records inserted for a filesystem.",
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value: float64(s.AllocationBTree.RecordsInserted),
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},
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{
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name: "allocation_btree_records_deleted_total",
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desc: "Number of allocation B-tree records deleted for a filesystem.",
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value: float64(s.AllocationBTree.RecordsDeleted),
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},
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{
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name: "block_mapping_reads_total",
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desc: "Number of block map for read operations for a filesystem.",
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value: float64(s.BlockMapping.Reads),
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},
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{
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name: "block_mapping_writes_total",
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desc: "Number of block map for write operations for a filesystem.",
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value: float64(s.BlockMapping.Writes),
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},
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{
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name: "block_mapping_unmaps_total",
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desc: "Number of block unmaps (deletes) for a filesystem.",
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value: float64(s.BlockMapping.Unmaps),
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},
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{
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name: "block_mapping_extent_list_insertions_total",
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desc: "Number of extent list insertions for a filesystem.",
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value: float64(s.BlockMapping.ExtentListInsertions),
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},
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{
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name: "block_mapping_extent_list_deletions_total",
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desc: "Number of extent list deletions for a filesystem.",
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value: float64(s.BlockMapping.ExtentListDeletions),
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},
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{
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name: "block_mapping_extent_list_lookups_total",
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desc: "Number of extent list lookups for a filesystem.",
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value: float64(s.BlockMapping.ExtentListLookups),
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},
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{
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name: "block_mapping_extent_list_compares_total",
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desc: "Number of extent list compares for a filesystem.",
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value: float64(s.BlockMapping.ExtentListCompares),
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},
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{
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name: "block_map_btree_lookups_total",
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desc: "Number of block map B-tree lookups for a filesystem.",
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value: float64(s.BlockMapBTree.Lookups),
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},
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{
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name: "block_map_btree_compares_total",
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desc: "Number of block map B-tree compares for a filesystem.",
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value: float64(s.BlockMapBTree.Compares),
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},
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{
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name: "block_map_btree_records_inserted_total",
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desc: "Number of block map B-tree records inserted for a filesystem.",
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value: float64(s.BlockMapBTree.RecordsInserted),
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},
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{
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name: "block_map_btree_records_deleted_total",
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desc: "Number of block map B-tree records deleted for a filesystem.",
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value: float64(s.BlockMapBTree.RecordsDeleted),
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},
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{
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name: "directory_operation_lookup_total",
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desc: "Number of file name directory lookups which miss the operating systems directory name lookup cache.",
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value: float64(s.DirectoryOperation.Lookups),
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},
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{
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name: "directory_operation_create_total",
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desc: "Number of times a new directory entry was created for a filesystem.",
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value: float64(s.DirectoryOperation.Creates),
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},
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{
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name: "directory_operation_remove_total",
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desc: "Number of times an existing directory entry was created for a filesystem.",
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value: float64(s.DirectoryOperation.Removes),
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},
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{
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name: "directory_operation_getdents_total",
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desc: "Number of times the directory getdents operation was performed for a filesystem.",
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value: float64(s.DirectoryOperation.Getdents),
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},
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{
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name: "inode_operation_attempts_total",
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desc: "Number of times the OS looked for an XFS inode in the inode cache.",
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value: float64(s.InodeOperation.Attempts),
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},
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{
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name: "inode_operation_found_total",
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desc: "Number of times the OS looked for and found an XFS inode in the inode cache.",
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value: float64(s.InodeOperation.Found),
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},
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{
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name: "inode_operation_recycled_total",
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desc: "Number of times the OS found an XFS inode in the cache, but could not use it as it was being recycled.",
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value: float64(s.InodeOperation.Recycle),
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},
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{
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name: "inode_operation_missed_total",
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desc: "Number of times the OS looked for an XFS inode in the cache, but did not find it.",
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value: float64(s.InodeOperation.Missed),
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},
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{
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name: "inode_operation_duplicates_total",
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desc: "Number of times the OS tried to add a missing XFS inode to the inode cache, but found it had already been added by another process.",
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value: float64(s.InodeOperation.Duplicate),
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},
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{
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name: "inode_operation_reclaims_total",
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desc: "Number of times the OS reclaimed an XFS inode from the inode cache to free memory for another purpose.",
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value: float64(s.InodeOperation.Reclaims),
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},
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{
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name: "inode_operation_attribute_changes_total",
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desc: "Number of times the OS explicitly changed the attributes of an XFS inode.",
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value: float64(s.InodeOperation.AttributeChange),
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},
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{
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name: "read_calls_total",
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desc: "Number of read(2) system calls made to files in a filesystem.",
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value: float64(s.ReadWrite.Read),
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},
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{
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name: "write_calls_total",
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desc: "Number of write(2) system calls made to files in a filesystem.",
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value: float64(s.ReadWrite.Write),
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},
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{
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name: "vnode_active_total",
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desc: "Number of vnodes not on free lists for a filesystem.",
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value: float64(s.Vnode.Active),
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},
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{
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name: "vnode_allocate_total",
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desc: "Number of times vn_alloc called for a filesystem.",
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value: float64(s.Vnode.Allocate),
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},
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{
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name: "vnode_get_total",
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desc: "Number of times vn_get called for a filesystem.",
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value: float64(s.Vnode.Get),
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},
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{
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name: "vnode_hold_total",
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desc: "Number of times vn_hold called for a filesystem.",
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value: float64(s.Vnode.Hold),
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},
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{
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name: "vnode_release_total",
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desc: "Number of times vn_rele called for a filesystem.",
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value: float64(s.Vnode.Release),
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},
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{
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name: "vnode_reclaim_total",
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desc: "Number of times vn_reclaim called for a filesystem.",
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value: float64(s.Vnode.Reclaim),
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},
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{
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name: "vnode_remove_total",
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desc: "Number of times vn_remove called for a filesystem.",
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value: float64(s.Vnode.Remove),
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},
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}
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for _, m := range metrics {
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desc := prometheus.NewDesc(
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prometheus.BuildFQName(namespace, subsystem, m.name),
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m.desc,
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labels,
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nil,
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)
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ch <- prometheus.MustNewConstMetric(
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desc,
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prometheus.CounterValue,
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m.value,
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s.Name,
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)
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}
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}
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