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tsweb: add vars for unix process start time and version

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To be scraped in the Go expvar JSON format, as a string is involved.

For a future tool to record when processes restarted exactly, and at
what version.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2021-08-23 09:44:53 -07:00 committed by Brad Fitzpatrick
parent 246fa67e56
commit 51976ab3a2
1 changed files with 3 additions and 0 deletions
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3
tsweb/tsweb.go
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@ -28,9 +28,12 @@ import (
"tailscale.com/metrics"
"tailscale.com/net/tsaddr"
"tailscale.com/types/logger"
"tailscale.com/version"
)
func init() {
expvar.Publish("process_start_unix_time", expvar.Func(func() interface{} { return timeStart.Unix() }))
expvar.Publish("version", expvar.Func(func() interface{} { return version.Long }))
expvar.Publish("counter_uptime_sec", expvar.Func(func() interface{} { return int64(Uptime().Seconds()) }))
expvar.Publish("gauge_goroutines", expvar.Func(func() interface{} { return runtime.NumGoroutine() }))
}