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Refactor scaling to use existing code

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Existing code has been used for scaling up and querying replicas.
This meant the new code was deleted and there is less duplication
now.

The cache store a whole query response rather than just the
available replica count and the tests were updated. This has been
tested with Docker swarm and the image:
 openfaas/gateway:scale-17-07-2018

This feature now needs the env-var of scale_from_zero to be enabled
in order to turn on the scaling behaviour.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>
This commit is contained in:
Alex Ellis (VMware)
2018-07-17 10:29:22 +01:00
committed by Alex Ellis
parent c58af8da56
commit 9512f09d2b
5 changed files with 29 additions and 82 deletions
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6
gateway/handlers/function_cache_test.go
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@ -20,7 +20,7 @@ func Test_LastRefreshSet(t *testing.T) {
t.Fail()
}
cache.Set(fnName, 1)
cache.Set(fnName, ServiceQueryResponse{AvailableReplicas: 1})
if _, exists := cache.Cache[fnName]; !exists {
t.Errorf("Expected entry to exist after setting %s", fnName)
@ -41,7 +41,7 @@ func Test_CacheExpiresIn1MS(t *testing.T) {
Expiry: time.Millisecond * 1,
}
cache.Set(fnName, 1)
cache.Set(fnName, ServiceQueryResponse{AvailableReplicas: 1})
time.Sleep(time.Millisecond * 2)
_, hit := cache.Get(fnName)
@ -61,7 +61,7 @@ func Test_CacheGivesHitWithLongExpiry(t *testing.T) {
Expiry: time.Millisecond * 500,
}
cache.Set(fnName, 1)
cache.Set(fnName, ServiceQueryResponse{AvailableReplicas: 1})
_, hit := cache.Get(fnName)
wantHit := true