github.com/terraform-modules-krish/terratest@v0.29.0/modules/k8s/tunnel_test.go (about)

     1  // +build kubeall kubernetes
     2  
     3  // NOTE: we have build tags to differentiate kubernetes tests from non-kubernetes tests. This is done because minikube
     4  // is heavy and can interfere with docker related tests in terratest. Specifically, many of the tests start to fail with
     5  // `connection refused` errors from `minikube`. To avoid overloading the system, we run the kubernetes tests and helm
     6  // tests separately from the others. This may not be necessary if you have a sufficiently powerful machine.  We
     7  // recommend at least 4 cores and 16GB of RAM if you want to run all the tests together.
     8  
     9  package k8s
    10  
    11  import (
    12  	"crypto/tls"
    13  	"fmt"
    14  	"strings"
    15  	"testing"
    16  	"time"
    17  
    18  	http_helper "github.com/terraform-modules-krish/terratest/modules/http-helper"
    19  	"github.com/terraform-modules-krish/terratest/modules/random"
    20  )
    21  
    22  func TestTunnelOpensAPortForwardTunnelToPod(t *testing.T) {
    23  	t.Parallel()
    24  
    25  	uniqueID := strings.ToLower(random.UniqueId())
    26  	options := NewKubectlOptions("", "", uniqueID)
    27  	configData := fmt.Sprintf(EXAMPLE_POD_YAML_TEMPLATE, uniqueID, uniqueID)
    28  	defer KubectlDeleteFromString(t, options, configData)
    29  	KubectlApplyFromString(t, options, configData)
    30  	WaitUntilPodAvailable(t, options, "nginx-pod", 60, 1*time.Second)
    31  
    32  	// Open a tunnel to pod from any available port locally
    33  	tunnel := NewTunnel(options, ResourceTypePod, "nginx-pod", 0, 80)
    34  	defer tunnel.Close()
    35  	tunnel.ForwardPort(t)
    36  
    37  	// Setup a TLS configuration to submit with the helper, a blank struct is acceptable
    38  	tlsConfig := tls.Config{}
    39  
    40  	// Try to access the nginx service on the local port, retrying until we get a good response for up to 5 minutes
    41  	http_helper.HttpGetWithRetryWithCustomValidation(
    42  		t,
    43  		fmt.Sprintf("http://%s", tunnel.Endpoint()),
    44  		&tlsConfig,
    45  		60,
    46  		5*time.Second,
    47  		verifyNginxWelcomePage,
    48  	)
    49  }
    50  
    51  func TestTunnelOpensAPortForwardTunnelToService(t *testing.T) {
    52  	t.Parallel()
    53  
    54  	uniqueID := strings.ToLower(random.UniqueId())
    55  	options := NewKubectlOptions("", "", uniqueID)
    56  	configData := fmt.Sprintf(EXAMPLE_POD_WITH_SERVICE_YAML_TEMPLATE, uniqueID, uniqueID, uniqueID)
    57  	defer KubectlDeleteFromString(t, options, configData)
    58  	KubectlApplyFromString(t, options, configData)
    59  	WaitUntilPodAvailable(t, options, "nginx-pod", 60, 1*time.Second)
    60  	WaitUntilServiceAvailable(t, options, "nginx-service", 60, 1*time.Second)
    61  
    62  	// Open a tunnel from any available port locally
    63  	tunnel := NewTunnel(options, ResourceTypeService, "nginx-service", 0, 80)
    64  	defer tunnel.Close()
    65  	tunnel.ForwardPort(t)
    66  
    67  	// Setup a TLS configuration to submit with the helper, a blank struct is acceptable
    68  	tlsConfig := tls.Config{}
    69  
    70  	// Try to access the nginx service on the local port, retrying until we get a good response for up to 5 minutes
    71  	http_helper.HttpGetWithRetryWithCustomValidation(
    72  		t,
    73  		fmt.Sprintf("http://%s", tunnel.Endpoint()),
    74  		&tlsConfig,
    75  		60,
    76  		5*time.Second,
    77  		verifyNginxWelcomePage,
    78  	)
    79  }
    80  
    81  func verifyNginxWelcomePage(statusCode int, body string) bool {
    82  	if statusCode != 200 {
    83  		return false
    84  	}
    85  	return strings.Contains(body, "Welcome to nginx")
    86  }
    87  
    88  const EXAMPLE_POD_WITH_SERVICE_YAML_TEMPLATE = `---
    89  apiVersion: v1
    90  kind: Namespace
    91  metadata:
    92    name: %s
    93  ---
    94  apiVersion: v1
    95  kind: Pod
    96  metadata:
    97    name: nginx-pod
    98    namespace: %s
    99    labels:
   100      app: nginx
   101  spec:
   102    containers:
   103    - name: nginx
   104      image: nginx:1.15.7
   105      ports:
   106      - containerPort: 80
   107      readinessProbe:
   108        httpGet:
   109          path: /
   110          port: 80
   111  ---
   112  apiVersion: v1
   113  kind: Service
   114  metadata:
   115    name: nginx-service
   116    namespace: %s
   117  spec:
   118    selector:
   119      app: nginx
   120    ports:
   121    - protocol: TCP
   122      targetPort: 80
   123      port: 80
   124  `