18794: Export config timestamp/hash as prometheus metric.

[arvados.git] / lib / config / load_test.go

diff --git a/lib/config/load_test.go b/lib/config/load_test.go
index cef7ea944bb08cd15357f9e4c58341a2135419f2..b43cda38c8a7a7304ea0a9fd74148e74be99d2d8 100644 (file)
--- a/lib/config/load_test.go
+++ b/lib/config/load_test.go
@@ -20,6 +20,8 @@ import (
        "git.arvados.org/arvados.git/sdk/go/arvados"
        "git.arvados.org/arvados.git/sdk/go/ctxlog"
        "github.com/ghodss/yaml"
+       "github.com/prometheus/client_golang/prometheus"
+       "github.com/prometheus/common/expfmt"
        "github.com/sirupsen/logrus"
        "golang.org/x/sys/unix"
        check "gopkg.in/check.v1"
@@ -798,5 +800,15 @@ func (s *LoadSuite) TestSourceTimestamp(c *check.C) {
                c.Assert(err, check.IsNil)
                c.Check(cfg.SourceTimestamp, check.Equals, cfg.SourceTimestamp.UTC())
                c.Check(int(cfg.SourceTimestamp.Sub(trial.expectTime).Seconds()), check.Equals, 0)
+
+               var buf bytes.Buffer
+               reg := prometheus.NewRegistry()
+               ldr.RegisterMetrics(reg)
+               enc := expfmt.NewEncoder(&buf, expfmt.FmtText)
+               got, _ := reg.Gather()
+               for _, mf := range got {
+                       enc.Encode(mf)
+               }
+               c.Check(buf.String(), check.Matches, `# HELP .*\n# TYPE .*\narvados_config_source_timestamp_seconds{sha256="83aea5d82eb1d53372cd65c936c60acc1c6ef946e61977bbca7cfea709d201a8"} \Q`+fmt.Sprintf("%g", float64(cfg.SourceTimestamp.UnixNano())/1e9)+`\E\n`)
        }
 }