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routing_test.go
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routing_test.go
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package vizzini_test
import (
"fmt"
"net/http"
"net/http/cookiejar"
"time"
"code.cloudfoundry.org/bbs/models"
"code.cloudfoundry.org/routing-info/cfroutes"
. "code.cloudfoundry.org/vizzini/matchers"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("Routing Related Tests", func() {
var lrp *models.DesiredLRP
Describe("sticky sessions", func() {
var httpClient *http.Client
BeforeEach(func() {
jar, err := cookiejar.New(nil)
Expect(err).NotTo(HaveOccurred())
httpClient = &http.Client{
Jar: jar,
}
lrp = DesiredLRPWithGuid(guid)
lrp.Instances = 3
Expect(bbsClient.DesireLRP(logger, traceID, lrp)).To(Succeed())
Eventually(IndexCounter(guid, httpClient)).Should(Equal(3))
})
It("should only route to the stuck instance", func() {
resp, err := httpClient.Get("http://" + RouteForGuid(guid) + "/stick")
Expect(err).NotTo(HaveOccurred())
resp.Body.Close()
//for some reason this isn't always 1! it's sometimes 2....
Expect(IndexCounter(guid, httpClient)()).To(BeNumerically("<", 3))
resp, err = httpClient.Get("http://" + RouteForGuid(guid) + "/unstick")
Expect(err).NotTo(HaveOccurred())
resp.Body.Close()
Expect(IndexCounter(guid, httpClient)()).To(Equal(3))
})
})
Describe("supporting multiple ports", func() {
var primaryURL string
BeforeEach(func() {
lrp = DesiredLRPWithGuid(guid)
lrp.Ports = []uint32{8080, 9999}
primaryURL = "http://" + RouteForGuid(guid) + "/env"
Expect(bbsClient.DesireLRP(logger, traceID, lrp)).To(Succeed())
Eventually(EndpointCurler(primaryURL)).Should(Equal(http.StatusOK))
})
It("should be able to route to multiple ports", func() {
By("updating the LRP with a new route to a port 9999")
newRoute := RouteForGuid(NewGuid())
routes, err := cfroutes.CFRoutesFromRoutingInfo(*lrp.Routes)
Expect(err).NotTo(HaveOccurred())
routes = append(routes, cfroutes.CFRoute{
Hostnames: []string{newRoute},
Port: 9999,
})
routingInfo := routes.RoutingInfo()
Expect(bbsClient.UpdateDesiredLRP(logger, traceID, guid, &models.DesiredLRPUpdate{
Routes: &routingInfo,
})).To(
Succeed())
By("verifying that the new route is hooked up to the port")
Eventually(EndpointContentCurler("http://" + newRoute)).Should(Equal("grace side-channel"))
By("verifying that the original route is fine")
Expect(EndpointContentCurler(primaryURL)()).To(ContainSubstring("DAQUIRI"), "something on the original endpoint that's not in the new one")
By("adding a new route to the new port")
veryNewRoute := RouteForGuid(NewGuid())
routes[1].Hostnames = append(routes[1].Hostnames, veryNewRoute)
routingInfo = routes.RoutingInfo()
Expect(bbsClient.UpdateDesiredLRP(logger, traceID, guid, &models.DesiredLRPUpdate{
Routes: &routingInfo,
})).To(
Succeed())
Eventually(EndpointContentCurler("http://" + veryNewRoute)).Should(Equal("grace side-channel"))
Expect(EndpointContentCurler("http://" + newRoute)()).To(Equal("grace side-channel"))
Expect(EndpointContentCurler(primaryURL)()).To(ContainSubstring("DAQUIRI"), "something on the original endpoint that's not in the new one")
By("tearing down the new port")
Expect(bbsClient.UpdateDesiredLRP(logger, traceID, guid, &models.DesiredLRPUpdate{
Routes: lrp.Routes,
})).To(
Succeed())
Eventually(EndpointCurler("http://" + newRoute)).ShouldNot(Equal(http.StatusOK))
})
})
Context("as containers come and go", func() {
var url string
var lrp *models.DesiredLRP
BeforeEach(func() {
url = "http://" + RouteForGuid(guid) + "/env"
lrp = DesiredLRPWithGuid(guid)
lrp.Instances = 3
Expect(bbsClient.DesireLRP(logger, traceID, lrp)).To(Succeed())
Eventually(ActualByProcessGuidGetter(logger, guid)).Should(ConsistOf(
BeActualLRPWithState(guid, 0, models.ActualLRPStateRunning),
BeActualLRPWithState(guid, 1, models.ActualLRPStateRunning),
BeActualLRPWithState(guid, 2, models.ActualLRPStateRunning),
))
})
It("{SLOW} should only route to running containers", func() {
done := make(chan struct{})
badCodes := []int{}
attempts := 0
go func() {
defer GinkgoRecover()
t := time.NewTicker(10 * time.Millisecond)
for {
select {
case <-done:
t.Stop()
case <-t.C:
attempts += 1
code := EndpointCurler(url)()
if code != http.StatusOK {
badCodes = append(badCodes, code)
}
}
}
}()
updateToThree := models.DesiredLRPUpdate{}
updateToThree.SetInstances(3)
updateToOne := models.DesiredLRPUpdate{}
updateToOne.SetInstances(1)
for i := 0; i < 4; i++ {
By(fmt.Sprintf("Scaling down then back up #%d", i+1))
Expect(bbsClient.UpdateDesiredLRP(logger, traceID, guid, &updateToOne)).To(Succeed())
Eventually(ActualByProcessGuidGetter(logger, guid)).Should(ConsistOf(
BeActualLRPWithState(guid, 0, models.ActualLRPStateRunning),
))
time.Sleep(200 * time.Millisecond)
Expect(bbsClient.UpdateDesiredLRP(logger, traceID, guid, &updateToThree)).To(Succeed())
Eventually(ActualByProcessGuidGetter(logger, guid)).Should(ConsistOf(
BeActualLRPWithState(guid, 0, models.ActualLRPStateRunning),
BeActualLRPWithState(guid, 1, models.ActualLRPStateRunning),
BeActualLRPWithState(guid, 2, models.ActualLRPStateRunning),
))
}
close(done)
fmt.Fprintf(GinkgoWriter, "%d bad codes out of %d attempts (%.3f%%)", len(badCodes), attempts, float64(len(badCodes))/float64(attempts)*100)
Expect(len(badCodes)).To(BeNumerically("<", float64(attempts)*0.01))
})
})
Describe("scaling down an LRP", func() {
BeforeEach(func() {
lrp = DesiredLRPWithGuid(guid)
lrp.Action = models.WrapAction(&models.RunAction{
Path: "/tmp/grace/grace",
Args: []string{"-catchTerminate"},
User: "vcap",
Env: []*models.EnvironmentVariable{{Name: "PORT", Value: "8080"}},
})
lrp.Instances = 5
})
JustBeforeEach(func() {
Expect(bbsClient.DesireLRP(logger, traceID, lrp)).To(Succeed())
Eventually(IndexCounter(guid), 15).Should(Equal(int(lrp.Instances)))
})
AfterEach(func() {
Expect(bbsClient.RemoveDesiredLRP(logger, traceID, lrp.ProcessGuid)).To(Succeed())
Eventually(func() []*models.ActualLRP {
lrps, err := bbsClient.ActualLRPs(logger, traceID, models.ActualLRPFilter{ProcessGuid: lrp.ProcessGuid})
Expect(err).NotTo(HaveOccurred())
return lrps
}, 20*time.Second).Should(BeEmpty())
})
Context("and the LRP has a setup step", func() {
BeforeEach(func() {
// simulate the same LRP structure found in CF. It turns out we broke
// this in https://www.pivotaltracker.com/story/show/156776776, and
// only discovered it later in
// https://www.pivotaltracker.com/story/show/156522178.
lrp.Setup = models.WrapAction(&models.RunAction{
Path: "bash",
Args: []string{"-c", "echo hi"},
User: "vcap",
})
})
It("finish outstanding requests", func() {
errCh := make(chan error, 1)
go func() {
resp, err := http.Get("http://" + RouteForGuid(guid) + "/sleep/8s")
resp.Body.Close()
errCh <- err
}()
dlu := &models.DesiredLRPUpdate{Routes: lrp.Routes}
dlu.SetInstances(0)
dlu.SetAnnotation(lrp.Annotation)
Expect(bbsClient.UpdateDesiredLRP(logger, traceID, lrp.ProcessGuid, dlu)).To(Succeed())
Consistently(errCh, 5*time.Second).ShouldNot(Receive())
})
})
It("quickly stops routing to the removed indices", func() {
dlu := &models.DesiredLRPUpdate{Routes: lrp.Routes}
dlu.SetInstances(1)
dlu.SetAnnotation(lrp.Annotation)
Expect(bbsClient.UpdateDesiredLRP(logger, traceID, lrp.ProcessGuid, dlu)).To(Succeed())
Eventually(IndexCounterWithAttempts(guid, 10), 2*time.Second).Should(Equal(1))
Consistently(IndexCounterWithAttempts(guid, 10), 5*time.Second).Should(Equal(1))
})
})
})