16306: Add health check endpoint to dispatcher.

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@curii.com>

diff --git a/lib/dispatchcloud/dispatcher.go b/lib/dispatchcloud/dispatcher.go
index 7614a143abded97b08757138bd4b152771eb3588..ae91a710e395295f47a34cb5645f980021e79021 100644 (file)
--- a/lib/dispatchcloud/dispatcher.go
+++ b/lib/dispatchcloud/dispatcher.go
@@ -22,6 +22,7 @@ import (
        "git.arvados.org/arvados.git/sdk/go/arvados"
        "git.arvados.org/arvados.git/sdk/go/auth"
        "git.arvados.org/arvados.git/sdk/go/ctxlog"
+       "git.arvados.org/arvados.git/sdk/go/health"
        "git.arvados.org/arvados.git/sdk/go/httpserver"
        "github.com/julienschmidt/httprouter"
        "github.com/prometheus/client_golang/prometheus"
@@ -164,6 +165,11 @@ func (disp *dispatcher) initialize() {
                })
                mux.Handler("GET", "/metrics", metricsH)
                mux.Handler("GET", "/metrics.json", metricsH)
+               mux.Handler("GET", "/_health/:check", &health.Handler{
+                       Token:  disp.Cluster.ManagementToken,
+                       Prefix: "/_health/",
+                       Routes: health.Routes{"ping": disp.CheckHealth},
+               })
                disp.httpHandler = auth.RequireLiteralToken(disp.Cluster.ManagementToken, mux)
        }
 }