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Feature for probing functions

Browse Source 
Introduces a single-flight call to a function's health
endpoint to verify that it is registered with an Istio
sidecar (Envoy) before letting the invocation through.

Results are cached for 5 seconds, before a probe is
required again.

Tested without Istio, with probe_functions environment
variable set to true, I saw a probe execute in the logs.

Fixes: #1721 for Istio users.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alex@openfaas.com>
This commit is contained in:
Alex Ellis (OpenFaaS Ltd)
2022-06-29 10:09:01 +01:00
committed by Alex Ellis
parent 01841f605c
commit 88eea5f62e
43 changed files with 784 additions and 468 deletions
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10
gateway/handlers/forwarding_proxy_test.go
View File

@ -10,6 +10,8 @@ import (
"net/http"
"net/url"
"testing"
"github.com/openfaas/faas/gateway/pkg/middleware"
)
func Test_buildUpstreamRequest_Body_Method_Query(t *testing.T) {
@ -170,7 +172,7 @@ func Test_getServiceName(t *testing.T) {
t.Fatal(err)
}
service := getServiceName(u.Path)
service := middleware.GetServiceName(u.Path)
if service != s.serviceName {
t.Fatalf("Incorrect service name - want: %s, got: %s", s.serviceName, service)
}
@ -195,7 +197,7 @@ func Test_buildUpstreamRequest_WithPathNoQuery(t *testing.T) {
t.Fail()
}
transformer := FunctionPrefixTrimmingURLPathTransformer{}
transformer := middleware.FunctionPrefixTrimmingURLPathTransformer{}
transformedPath := transformer.Transform(request)
wantTransformedPath := functionPath
@ -251,7 +253,7 @@ func Test_buildUpstreamRequest_WithNoPathNoQuery(t *testing.T) {
t.Fail()
}
transformer := FunctionPrefixTrimmingURLPathTransformer{}
transformer := middleware.FunctionPrefixTrimmingURLPathTransformer{}
transformedPath := transformer.Transform(request)
wantTransformedPath := "/"
@ -305,7 +307,7 @@ func Test_buildUpstreamRequest_WithPathAndQuery(t *testing.T) {
t.Fail()
}
transformer := FunctionPrefixTrimmingURLPathTransformer{}
transformer := middleware.FunctionPrefixTrimmingURLPathTransformer{}
transformedPath := transformer.Transform(request)
wantTransformedPath := functionPath