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Add node_filesystem_mount_info metric (#2970) 

* Add node_filesystem_mount_info metric

Fixes: #1384

---------

Signed-off-by: Miguel Oliveira <miguel.oliveira4224@gmail.com>
This commit is contained in:
Miguel Oliveira 2024-07-14 11:33:12 -03:00 committed by GitHub
parent 8a3a0dea73
commit b9d0932179
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
9 changed files with 84 additions and 51 deletions
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15
collector/filesystem_common.go
View File

@ -69,11 +69,12 @@ type filesystemCollector struct {
sizeDesc, freeDesc, availDesc *prometheus.Desc
filesDesc, filesFreeDesc *prometheus.Desc
roDesc, deviceErrorDesc *prometheus.Desc
mountInfoDesc *prometheus.Desc
logger log.Logger
}
type filesystemLabels struct {
device, mountPoint, fsType, options, deviceError string
device, mountPoint, fsType, options, deviceError, major, minor string
}
type filesystemStats struct {
@ -155,6 +156,13 @@ func NewFilesystemCollector(logger log.Logger) (Collector, error) {
filesystemLabelNames, nil,
)
mountInfoDesc := prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "mount_info"),
"Filesystem mount information.",
[]string{"device", "major", "minor", "mountpoint"},
nil,
)
return &filesystemCollector{
excludedMountPointsPattern: mountPointPattern,
excludedFSTypesPattern: filesystemsTypesPattern,
@ -165,6 +173,7 @@ func NewFilesystemCollector(logger log.Logger) (Collector, error) {
filesFreeDesc: filesFreeDesc,
roDesc: roDesc,
deviceErrorDesc: deviceErrorDesc,
mountInfoDesc: mountInfoDesc,
logger: logger,
}, nil
}
@ -215,6 +224,10 @@ func (c *filesystemCollector) Update(ch chan<- prometheus.Metric) error {
c.filesFreeDesc, prometheus.GaugeValue,
s.filesFree, s.labels.device, s.labels.mountPoint, s.labels.fsType, s.labels.deviceError,
)
ch <- prometheus.MustNewConstMetric(
c.mountInfoDesc, prometheus.GaugeValue,
1.0, s.labels.device, s.labels.major, s.labels.minor, s.labels.mountPoint,
)
}
return nil
}

35
collector/filesystem_linux.go
View File

@ -178,11 +178,11 @@ func stuckMountWatcher(mountPoint string, success chan struct{}, logger log.Logg
}
func mountPointDetails(logger log.Logger) ([]filesystemLabels, error) {
file, err := os.Open(procFilePath("1/mounts"))
file, err := os.Open(procFilePath("1/mountinfo"))
if errors.Is(err, os.ErrNotExist) {
// Fallback to `/proc/mounts` if `/proc/1/mounts` is missing due hidepid.
level.Debug(logger).Log("msg", "Reading root mounts failed, falling back to system mounts", "err", err)
file, err = os.Open(procFilePath("mounts"))
// Fallback to `/proc/self/mountinfo` if `/proc/1/mountinfo` is missing due hidepid.
level.Debug(logger).Log("msg", "Reading root mounts failed, falling back to self mounts", "err", err)
file, err = os.Open(procFilePath("self/mountinfo"))
}
if err != nil {
return nil, err
@ -199,20 +199,33 @@ func parseFilesystemLabels(r io.Reader) ([]filesystemLabels, error) {
for scanner.Scan() {
parts := strings.Fields(scanner.Text())
if len(parts) < 4 {
if len(parts) < 10 {
return nil, fmt.Errorf("malformed mount point information: %q", scanner.Text())
}
major, minor := 0, 0
_, err := fmt.Sscanf(parts[2], "%d:%d", &major, &minor)
if err != nil {
return nil, fmt.Errorf("malformed mount point information: %q", scanner.Text())
}
m := 5
for parts[m+1] != "-" {
m++
}
// Ensure we handle the translation of \040 and \011
// as per fstab(5).
parts[1] = strings.Replace(parts[1], "\\040", " ", -1)
parts[1] = strings.Replace(parts[1], "\\011", "\t", -1)
parts[4] = strings.Replace(parts[4], "\\040", " ", -1)
parts[4] = strings.Replace(parts[4], "\\011", "\t", -1)
filesystems = append(filesystems, filesystemLabels{
device: parts[0],
mountPoint: rootfsStripPrefix(parts[1]),
fsType: parts[2],
options: parts[3],
device: parts[m+3],
mountPoint: rootfsStripPrefix(parts[4]),
fsType: parts[m+2],
options: parts[5],
major: fmt.Sprint(major),
minor: fmt.Sprint(minor),
deviceError: "",
})
}

8
collector/filesystem_linux_test.go
View File

@ -87,10 +87,18 @@ func TestMountPointDetails(t *testing.T) {
t.Log(err)
}
foundSet := map[string]bool{}
for _, fs := range filesystems {
if _, ok := expected[fs.mountPoint]; !ok {
t.Errorf("Got unexpected %s", fs.mountPoint)
}
foundSet[fs.mountPoint] = true
}
for mountPoint := range expected {
if _, ok := foundSet[mountPoint]; !ok {
t.Errorf("Expected %s, got nothing", mountPoint)
}
}
}

31
collector/fixtures/proc/1/mountinfo Normal file
View File

@ -0,0 +1,31 @@
24 29 0:22 / /sys rw,nosuid,nodev,noexec,relatime shared:7 - sysfs sysfs rw
25 29 0:23 / /proc rw,nosuid,nodev,noexec,relatime shared:13 - proc proc rw
26 29 0:5 / /dev rw,nosuid,relatime shared:2 - devtmpfs udev rw,size=7978892k,nr_inodes=1994723,mode=755
27 26 0:24 / /dev/pts rw,nosuid,noexec,relatime shared:3 - devpts devpts rw,gid=5,mode=620,ptmxmode=000
28 29 0:25 / /run rw,nosuid,relatime shared:5 - tmpfs tmpfs rw,size=1617716k,mode=755
29 1 259:2 / / rw,relatime shared:1 - ext4 /dev/dm-2 errors=remount-ro,data=ordered
30 24 0:6 / /sys/kernel/security rw,nosuid,nodev,noexec,relatime shared:8 - securityfs securityfs rw
31 26 0:26 / /dev/shm rw,nosuid,nodev shared:4 - tmpfs tmpfs rw,inode64
32 28 0:27 / /run/lock rw,nosuid,nodev,noexec,relatime shared:6 - tmpfs tmpfs rw,size=5120k
33 24 0:28 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:9 - tmpfs tmpfs ro,mode=755
34 31 0:24 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:10 - cgroup cgroup rw,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd
35 32 0:25 / /sys/fs/pstore rw,nosuid,nodev,noexec,relatime shared:11 - pstore pstore rw
36 33 0:26 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:12 - cgroup cgroup rw,cpuset
37 34 0:27 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:14 - cgroup cgroup rw,cpu,cpuacct
38 35 0:28 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:16 - cgroup cgroup rw,devices
39 36 0:29 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:17 - cgroup cgroup rw,freezer
40 37 0:30 / /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime shared:18 - cgroup cgroup rw,net_cls,net_prio
41 38 0:31 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:19 - cgroup cgroup rw,blkio
42 39 0:32 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime shared:20 - cgroup cgroup rw,perf_event
43 40 0:33 / /proc/sys/fs/binfmt_misc rw,relatime shared:21 - systemd-1 autofs rw,fd=22,pgrp=1,timeout=300,minproto=5,maxproto=5,direct
44 41 0:34 / /dev/mqueue rw,relatime shared:22 - mqueue mqueue rw
45 42 0:35 / /sys/kernel/debug rw,relatime shared:23 - debugfs debugfs rw
46 43 0:36 / /dev/hugepages rw,relatime shared:24 - hugetlbfs hugetlbfs rw
47 44 0:37 / /sys/fs/fuse/connections rw,relatime shared:25 - fusectl fusectl rw
48 45 260:3 / /boot rw,relatime shared:92 - ext2 /dev/sda3 rw
49 46 0:39 / /run/rpc_pipefs rw,relatime shared:27 - rpc_pipefs rpc_pipefs rw
265 37 0:41 / /proc/sys/fs/binfmt_misc rw,nosuid,nodev,noexec,relatime shared:94 - binfmt_misc binfmt_misc rw
3002 28 0:79 / /run/user/1000 rw,nosuid,nodev,relatime shared:1225 - tmpfs tmpfs rw,size=1603436k,nr_inodes=400859,mode=700,uid=1000,gid=1000
3147 3002 0:81 / /run/user/1000/gvfs rw,nosuid,nodev,relatime shared:1290 - fuse.gvfsd-fuse gvfsd-fuse rw,user_id=1000,group_id=1000
3148 3003 260:0 / /var/lib/kubelet/plugins/kubernetes.io/vsphere-volume/mounts/[vsanDatastore]\040bafb9e5a-8856-7e6c-699c-801844e77a4a/kubernetes-dynamic-pvc-3eba5bba-48a3-11e8-89ab-005056b92113.vmdk rw,relatime shared:31 - ext4 /dev/sda rw,data=ordered
3149 3004 260:0 / /var/lib/kubelet/plugins/kubernetes.io/vsphere-volume/mounts/[vsanDatastore]\011bafb9e5a-8856-7e6c-699c-801844e77a4a/kubernetes-dynamic-pvc-3eba5bba-48a3-11e8-89ab-005056b92113.vmdk rw,relatime shared:32 - ext4 /dev/sda rw,data=ordered

32
collector/fixtures/proc/1/mounts
View File

@ -1,32 +0,0 @@
rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,relatime,size=10240k,nr_inodes=1008585,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,relatime,size=1617716k,mode=755 0 0
/dev/dm-2 / ext4 rw,relatime,errors=remount-ro,data=ordered 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
tmpfs /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_cls,net_prio 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
systemd-1 /proc/sys/fs/binfmt_misc autofs rw,relatime,fd=22,pgrp=1,timeout=300,minproto=5,maxproto=5,direct 0 0
mqueue /dev/mqueue mqueue rw,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
hugetlbfs /dev/hugepages hugetlbfs rw,relatime 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
/dev/sda3 /boot ext2 rw,relatime 0 0
rpc_pipefs /run/rpc_pipefs rpc_pipefs rw,relatime 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
tmpfs /run/user/1000 tmpfs rw,nosuid,nodev,relatime,size=808860k,mode=700,uid=1000,gid=1000 0 0
gvfsd-fuse /run/user/1000/gvfs fuse.gvfsd-fuse rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0
/dev/sda /var/lib/kubelet/plugins/kubernetes.io/vsphere-volume/mounts/[vsanDatastore]\040bafb9e5a-8856-7e6c-699c-801844e77a4a/kubernetes-dynamic-pvc-3eba5bba-48a3-11e8-89ab-005056b92113.vmdk ext4 rw,relatime,data=ordered 0 0
/dev/sda /var/lib/kubelet/plugins/kubernetes.io/vsphere-volume/mounts/[vsanDatastore]\011bafb9e5a-8856-7e6c-699c-801844e77a4a/kubernetes-dynamic-pvc-3eba5bba-48a3-11e8-89ab-005056b92113.vmdk ext4 rw,relatime,data=ordered 0 0

6
collector/fixtures_bindmount/proc/1/mountinfo Normal file
View File

@ -0,0 +1,6 @@
29 1 259:0 / /host rw,seclabel,relatime,data=ordered shared:1 - ext4 /dev/nvme1n0 rw
30 1 260:0 / /host/media/volume1 rw,seclabel,relatime,data=ordered shared:1 - ext4 /dev/nvme1n1 rw
31 1 261:0 / /host/media/volume2 rw,seclabel,relatime,data=ordered shared:1 - ext4 /dev/nvme1n2 rw
31 26 0:26 / /dev/shm rw,nosuid,nodev shared:4 - tmpfs tmpfs rw,inode64
32 28 0:27 / /run/lock rw,nosuid,nodev,noexec,relatime shared:6 - tmpfs tmpfs rw,size=5120k,inode64
33 24 0:28 / /sys/fs/cgroup rw,nosuid,nodev,noexec,relatime shared:9 - cgroup2 cgroup2 rw

6
collector/fixtures_bindmount/proc/mounts
View File

@ -1,6 +0,0 @@
/dev/nvme1n0 /host ext4 rw,seclabel,relatime,data=ordered 0 0
/dev/nvme1n1 /host/media/volume1 ext4 rw,seclabel,relatime,data=ordered 0 0
/dev/nvme1n2 /host/media/volume2 ext4 rw,seclabel,relatime,data=ordered 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
tmpfs /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0

1
collector/fixtures_hidepid/proc/mounts
View File

@ -1 +0,0 @@
rootfs / rootfs rw 0 0

1
collector/fixtures_hidepid/proc/self/mountinfo Normal file
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@ -0,0 +1 @@
29 1 259:2 / / rw,relatime shared:1 - ext4 /dev/nvme0n1p2 rw,errors=remount-ro