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Deprecate ntp collector 

The ntp collector has always been a source of confusion and problems.
The data it produces is more of a blackbox probe against an NTP server.
The time sync / offset data produced is not what users expect.

Mark this collector as deprecated to be removed in v2.0.0

Signed-off-by: Ben Kochie <superq@gmail.com>
This commit is contained in:
Ben Kochie 2023-02-16 08:25:17 +01:00
parent 7f05e312ac
commit c8705ec4b2
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3 changed files with 12 additions and 1 deletions
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9
README.md
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@ -165,7 +165,6 @@ logind | Exposes session counts from [logind](http://www.freedesktop.org/wiki/So
meminfo\_numa | Exposes memory statistics from `/proc/meminfo_numa`. | Linux
mountstats | Exposes filesystem statistics from `/proc/self/mountstats`. Exposes detailed NFS client statistics. | Linux
network_route | Exposes the routing table as metrics | Linux
ntp | Exposes local NTP daemon health to check [time](./docs/TIME.md) | _any_
perf | Exposes perf based metrics (Warning: Metrics are dependent on kernel configuration and settings). | Linux
processes | Exposes aggregate process statistics from `/proc`. | Linux
qdisc | Exposes [queuing discipline](https://en.wikipedia.org/wiki/Network_scheduler#Linux_kernel) statistics | Linux
@ -178,6 +177,14 @@ tcpstat | Exposes TCP connection status information from `/proc/net/tcp` and `/p
wifi | Exposes WiFi device and station statistics. | Linux
zoneinfo | Exposes NUMA memory zone metrics. | Linux
### Deprecated
These colectors are deprecated and will be removed in the next major release.
Name | Description | OS
---------|-------------|----
ntp | Exposes local NTP daemon health to check [time](./docs/TIME.md) | _any_
### Perf Collector
The `perf` collector may not work out of the box on some Linux systems due to kernel

2
collector/ntp.go
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@ -24,6 +24,7 @@ import (
"github.com/beevik/ntp"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"gopkg.in/alecthomas/kingpin.v2"
)
@ -79,6 +80,7 @@ func NewNtpCollector(logger log.Logger) (Collector, error) {
return nil, fmt.Errorf("invalid NTP port number %d; must be between 1 and 65535 inclusive", *ntpServerPort)
}
level.Warn(logger).Log("msg", "This collector is deprecated and will be removed in the next major version release.")
return &ntpCollector{
stratum: typedDesc{prometheus.NewDesc(
prometheus.BuildFQName(namespace, ntpSubsystem, "stratum"),

2
docs/TIME.md
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@ -2,6 +2,8 @@
## `ntp` collector
NOTE: This collector is deprecated and will be removed in the next major version release.
This collector is intended for usage with local NTP daemons including [ntp.org](http://ntp.org/), [chrony](https://chrony.tuxfamily.org/comparison.html), and [OpenNTPD](http://www.openntpd.org/).
Note, some chrony packages have `local stratum 10` configuration value making chrony a valid server when it is unsynchronised. This configuration makes one of the heuristics that derive `node_ntp_sanity` unreliable.