Robustify nginx tests

[skip ci]

While chasing a flake, I discovered that our alpine_nginx
image is broken: it returns 404 on all requests. We never
caught this because--surprise!--curl exits 0 even when
server returns 4xx/5xx status.

Let's be strict: add -f (--fail) option to all invocations
of curl.

And, although I couldn't identify the root cause of the
flake (in "run two containers with the same IP" test),
I can at least fix the broken wait-for-nginx loop, bump
up the number of retries, and improve diagnostics on
failure. And add a strict error-message check.

Signed-off-by: Ed Santiago <santiago@redhat.com>

test/e2e/common_test.go

@@ -462,7 +462,8 @@ func (p *PodmanTestIntegration) RunNginxWithHealthCheck(name string) (*PodmanSes
 	if name != "" {
 		podmanArgs = append(podmanArgs, "--name", name)
 	}
-	podmanArgs = append(podmanArgs, "-dt", "-P", "--health-cmd", "curl http://localhost/", nginx)
+	// curl without -f exits 0 even if http code >= 400!
+	podmanArgs = append(podmanArgs, "-dt", "-P", "--health-cmd", "curl -f http://localhost/", nginx)
 	session := p.Podman(podmanArgs)
 	session.WaitWithDefaultTimeout()
 	return session, session.OutputToString()

test/e2e/pod_infra_container_test.go

@@ -119,11 +119,11 @@ var _ = Describe("Podman pod create", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 
-		session = podmanTest.Podman([]string{"run", "--pod", podID, fedoraMinimal, "curl", "localhost:80"})
+		session = podmanTest.Podman([]string{"run", "--pod", podID, fedoraMinimal, "curl", "-f", "localhost:80"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 
-		session = podmanTest.Podman([]string{"run", fedoraMinimal, "curl", "localhost"})
+		session = podmanTest.Podman([]string{"run", fedoraMinimal, "curl", "-f", "localhost"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).To(ExitWithError())
 	})
@@ -219,7 +219,7 @@ var _ = Describe("Podman pod create", func() {
 		session.WaitWithDefaultTimeout()
 		Expect(session).Should(Exit(0))
 
-		session = podmanTest.Podman([]string{"run", "--pod", podID, "--network", "bridge", nginx, "curl", "localhost"})
+		session = podmanTest.Podman([]string{"run", "--pod", podID, "--network", "bridge", nginx, "curl", "-f", "localhost"})
 		session.WaitWithDefaultTimeout()
 		Expect(session).To(ExitWithError())
 	})

test/e2e/run_staticip_test.go

@@ -102,22 +102,33 @@ var _ = Describe("Podman run with --ip flag", func() {
 
 	It("Podman run two containers with the same IP", func() {
 		ip := GetRandomIPAddress()
-		result := podmanTest.Podman([]string{"run", "-dt", "--ip", ip, nginx})
+		result := podmanTest.Podman([]string{"run", "-d", "--name", "nginx", "--ip", ip, nginx})
 		result.WaitWithDefaultTimeout()
 		Expect(result).Should(Exit(0))
-		for i := 0; i < 10; i++ {
-			fmt.Println("Waiting for nginx", err)
-			time.Sleep(1 * time.Second)
+
+		for retries := 20; retries > 0; retries-- {
 			response, err := http.Get(fmt.Sprintf("http://%s", ip))
-			if err != nil {
-				continue
-			}
-			if response.StatusCode == http.StatusOK {
+			if err == nil && response.StatusCode == http.StatusOK {
 				break
 			}
+			if retries == 1 {
+				logps := podmanTest.Podman([]string{"ps", "-a"})
+				logps.WaitWithDefaultTimeout()
+				logps = podmanTest.Podman([]string{"logs", "nginx"})
+				logps.WaitWithDefaultTimeout()
+				Fail("Timed out waiting for nginx container, see ps & log above.")
+			}
+
+			if err != nil {
+				fmt.Printf("nginx not ready yet; error=%v; %d retries left...\n", err, retries)
+			} else {
+				fmt.Printf("nginx not ready yet; response=%v; %d retries left...\n", response.StatusCode, retries)
+			}
+			time.Sleep(1 * time.Second)
 		}
-		result = podmanTest.Podman([]string{"run", "-ti", "--ip", ip, ALPINE, "ip", "addr"})
+		result = podmanTest.Podman([]string{"run", "--ip", ip, ALPINE, "ip", "addr"})
 		result.WaitWithDefaultTimeout()
 		Expect(result).To(ExitWithError())
+		Expect(result.ErrorToString()).To(ContainSubstring(" address %s ", ip))
 	})
 })