Improve log messages during 2.0 startup

[grobie]

Prometheus 2.0 doesn't log anything useful during a startup of a bit more complex config (k8s_sd, dns_sd, lot's of relabeling).

INFO[0000] Build context (go=go1.8.1, user=grobie@grobook, date=20170505-12:50:08)  source=main.go:74
INFO[0026] Loading configuration file prometheus.yml     source=main.go:215

[brian-brazil]

What do you expect it to log?

We don't log anything related to SD/relabelling currently in 1.6 at startup.

[grobie]

Anything telling me what it's doing right now instead of locking up for tens of seconds.

[gouthamve]

Fixed in #2844? So the main thing I observed that took time during startup is the reading of WAL by the tsdb.

I added a couple of lines, specifically:

INFO[0000] Starting prometheus (version=, branch=, revision=)  source="main.go:193"
INFO[0000] Build context (go=go1.8.1, user=, date=)      source="main.go:194"
INFO[0000] Host details (linux)                          source="main.go:195"
INFO[0000] Starting tsdb                                 source="main.go:207"               <---------------
INFO[0015] tsdb started                                  source="main.go:213"               <--------------- 
INFO[0015] Loading configuration file prometheus.yml     source="main.go:340"
INFO[0015] Starting target manager...                    source="targetmanager.go:67"
INFO[0015] Listening on :9090                            source="web.go:260"

[ghost]

Hello, So where can i add the lines which you added. Srikanth

…

On Thu, Jun 15, 2017 at 6:09 AM, Goutham Veeramachaneni < ***@***.***> wrote: Fixed in #2844 <#2844>? So the main thing I observed that took time during startup is the reading of WAL by the tsdb. I added a couple of lines, specifically: INFO[0000] Starting prometheus (version=, branch=, revision=) source="main.go:193" INFO[0000] Build context (go=go1.8.1, user=, date=) source="main.go:194" INFO[0000] Host details (linux) source="main.go:195" INFO[0000] Starting tsdb source="main.go:207" <--------------- INFO[0015] tsdb started source="main.go:213" <--------------- INFO[0015] Loading configuration file prometheus.yml source="main.go:340" INFO[0015] Starting target manager... source="targetmanager.go:67" INFO[0015] Listening on :9090 source="web.go:260" — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#2680 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AcFE9XdZf33CLFazTaI_bXZvZ4PMOFXiks5sES0GgaJpZM4NR4Qs> .

[gouthamve]

Closing this as tsdb startup is the main contributor to the start time and logs now show that.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.