Note: the ability to disable http2 via scrape config was only added in v2.35.0 <https://github.com/prometheus/prometheus/releases/tag/v2.35.0>.
For an older version, you could try environment variables DISABLE_HTTP2=1 and/or GODEBUG=http2client=0 On Friday, 9 September 2022 at 13:18:42 UTC+1 Brian Candler wrote: > What prometheus version are you using? I'd suggest v2.37.0 (2.37 is an > LTS release branch) > > "promtool debug metrics" doesn't seem to have many options, but you could > try in your prometheus scrape config: > > enable_http2: false > > and/or > > tls_config: > insecure_skip_verify: true > > to try and narrow down the problem. > > On Friday, 9 September 2022 at 10:19:40 UTC+1 [email protected] wrote: > >> promtool debug metrics https://myserver:8181 >> >> collecting: https://myserver:8181/metrics >> >> 2022/09/09 11:15:05 http2: Transport failed to get client conn for >> myserver:8181: http2: no cached connection was available >> >> error completing debug command: error executing HTTP request: Get " >> https://myserver:8181/metrics": EOF >> >> >> If I open the url in a browser or with curl I get proper response :( Any >> hint what I might be missing? testssl.sh works fine too >> >> >> >> On Friday, 9 September 2022 at 10:37:13 UTC+2 Markus Glück wrote: >> >>> Hi guys, >>> I currently trying to debug a similar issue. I am also getting EOF only >>> as error in debug level from scrape manager. I had the same issue locally >>> with curl and LibreSSL on macOS. Updating the curl version to use openSSL >>> fixed it. So my assumption it's something related to SSL/TLS. My working >>> curl verbose output gives me this in regards to TLS: >>> >>> * ALPN: offers h2 >>> >>> * ALPN: offers http/1.1 >>> >>> } [5 bytes data] >>> >>> * TLSv1.3 (OUT), TLS handshake, Client hello (1): >>> >>> } [512 bytes data] >>> >>> * TLSv1.3 (IN), TLS handshake, Server hello (2): >>> >>> { [193 bytes data] >>> >>> * TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1): >>> >>> } [1 bytes data] >>> >>> * TLSv1.3 (OUT), TLS handshake, Client hello (1): >>> >>> } [512 bytes data] >>> >>> * TLSv1.3 (IN), TLS handshake, Server hello (2): >>> >>> { [155 bytes data] >>> >>> * TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8): >>> >>> { [51 bytes data] >>> >>> * TLSv1.3 (IN), TLS handshake, Certificate (11): >>> >>> { [4943 bytes data] >>> >>> * TLSv1.3 (IN), TLS handshake, CERT verify (15): >>> >>> { [520 bytes data] >>> >>> * TLSv1.3 (IN), TLS handshake, Finished (20): >>> >>> { [52 bytes data] >>> >>> * TLSv1.3 (OUT), TLS handshake, Finished (20): >>> >>> } [52 bytes data] >>> >>> * SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384 >>> >>> * ALPN: server accepted h2 >>> >>> >>> but HOW do I get more info from Prometheus? >>> >>> Thx, >>> >>> Markus >>> >>> On Thursday, 14 July 2022 at 16:25:36 UTC+2 Brian Candler wrote: >>> >>>> The straightforward way to debug this by doing a scrape by hand: it's >>>> just a HTTP request. >>>> >>>> curl -g 'https://blah.local:9126/metrics' >>>> >>>> Add flag '-v' for more debugging if required (e.g. response headers may >>>> give you an extra clue). Once you're able to scrape the exporter with >>>> curl, then prometheus should be able to talk to it too. >>>> >>>> Given that it's https, if you get a certificate error then you can add >>>> flag '-k' to skip certificate verification. If that turns out to be the >>>> problem, then there are extra flags you can pass to curl, e.g. to pass the >>>> CA root certificate (if the target's cert was signed by a CA that's not in >>>> the system trust store). Once you've got all that working, you can make >>>> the corresponding changes to prometheus' tls_config. >>>> >>>> On Thursday, 14 July 2022 at 14:46:24 UTC+1 [email protected] >>>> wrote: >>>> >>>>> Hello Team, >>>>> >>>>> I have promethus installed on kubernet and add scraping targets from >>>>> cmdb using http_sd_config. >>>>> >>>>> I am getting EOF error while i add targets. And it’s show down. >>>>> >>>>> Can someone please help me what is the issue. >>>>> >>>>> For your reference attached screenshot of error. >>>>> >>>>> Thanks and regards >>>>> Ritesh patel >>>>> >>>> -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/9c49c9ab-23e9-4ad2-a828-712c725ff5f9n%40googlegroups.com.
