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fix(disruption): Using correct internal LB of apiserver for monitor test on ARO and Baremetal Hypershift
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‎optimization_summary.md‎

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@@ -0,0 +1,55 @@
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# Code Optimization Summary
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## Optimizations Made to `pkg/monitortests/kubeapiserver/disruptioninclusterapiserver/monitortest.go`
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### 1. **Added Missing Import**
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- Added `"strings"` import that was missing but needed for the code
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### 2. **Eliminated Duplicate URL Parsing**
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- **Before**: `adminRESTConfig.Host` was parsed twice:
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- Once in `StartCollection()` (lines 432-441)
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- Again in `createInternalLBDeployment()` (lines 134-144 and 153-163)
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- **After**: Created `parseAdminRESTConfigHost()` helper method that parses once and returns both hostname and port
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### 3. **Consolidated Environment Variable Logic**
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- **Before**: Complex nested if-else logic duplicated for both `KUBERNETES_SERVICE_HOST` and `KUBERNETES_SERVICE_PORT`
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- **After**: Created `setKubernetesServiceEnvVars()` helper method that:
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- Parses URL only once for bare metal HyperShift
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- Uses a clean switch statement for environment variable names
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- Handles all cluster types (ARO HCP, bare metal HyperShift, standard) in one place
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### 4. **Improved Performance**
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- **Before**: URL parsing happened multiple times for the same URL
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- **After**: URL parsing happens only once per method call
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- **Before**: Environment variable loop went through all variables twice
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- **After**: Single loop with switch statement
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### 5. **Better Error Handling**
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- Centralized error handling in the helper methods
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- Consistent error logging across all cluster types
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- Graceful fallback to default values when parsing fails
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### 6. **Code Readability**
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- **Before**: 40+ lines of complex nested if-else logic
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- **After**: Clean, readable helper methods with single responsibility
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- Clear separation of concerns between URL parsing and environment variable setting
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## Key Benefits
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1. **DRY Principle**: Eliminated code duplication
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2. **Performance**: Reduced redundant operations
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3. **Maintainability**: Centralized logic in helper methods
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4. **Readability**: Cleaner, more understandable code
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5. **Testability**: Helper methods can be tested independently
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6. **Consistency**: Uniform error handling and logging
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## Files Modified
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- `pkg/monitortests/kubeapiserver/disruptioninclusterapiserver/monitortest.go`
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- Added `parseAdminRESTConfigHost()` helper method
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- Added `setKubernetesServiceEnvVars()` helper method
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- Simplified `createInternalLBDeployment()` method
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- Optimized `StartCollection()` method
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- Added missing `strings` import
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The optimized code maintains the same functionality while being more efficient, readable, and maintainable.

‎pkg/monitortests/kubeapiserver/disruptioninclusterapiserver/monitortest.go‎

Lines changed: 77 additions & 22 deletions
Original file line numberDiff line numberDiff line change
@@ -75,8 +75,9 @@ type InvariantInClusterDisruption struct {
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replicas int32
7676
controlPlaneNodes int32
7777

78-
isHypershift bool
79-
isAROHCPCluster bool
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isHypershift bool
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isAROHCPCluster bool
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isBareMetalHypershift bool
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8182
adminRESTConfig *rest.Config
8283
kubeClient kubernetes.Interface
@@ -88,6 +89,68 @@ func NewInvariantInClusterDisruption(info monitortestframework.MonitorTestInitia
8889
}
8990
}
9091

92+
// parseAdminRESTConfigHost parses the adminRESTConfig.Host URL and returns hostname and port
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func (i *InvariantInClusterDisruption) parseAdminRESTConfigHost() (hostname, port string, err error) {
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parsedURL, err := url.Parse(i.adminRESTConfig.Host)
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if err != nil {
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return "", "", fmt.Errorf("failed to parse adminRESTConfig.Host %q: %v", i.adminRESTConfig.Host, err)
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}
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hostname = parsedURL.Hostname()
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if hostname == "" {
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return "", "", fmt.Errorf("no hostname found in adminRESTConfig.Host %q", i.adminRESTConfig.Host)
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}
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port = parsedURL.Port()
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if port == "" {
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port = "6443" // default port
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}
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return hostname, port, nil
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}
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// setKubernetesServiceEnvVars sets the KUBERNETES_SERVICE_HOST and KUBERNETES_SERVICE_PORT environment variables
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// based on the cluster type (ARO HCP, bare metal HyperShift, or standard)
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func (i *InvariantInClusterDisruption) setKubernetesServiceEnvVars(envVars []corev1.EnvVar, apiIntHost, apiIntPort string) []corev1.EnvVar {
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// Parse adminRESTConfig.Host once for bare metal HyperShift
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var bareMetalHost, bareMetalPort string
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var bareMetalErr error
118+
if i.isHypershift && i.isBareMetalHypershift {
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bareMetalHost, bareMetalPort, bareMetalErr = i.parseAdminRESTConfigHost()
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if bareMetalErr != nil {
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logrus.WithError(bareMetalErr).Errorf("Failed to parse adminRESTConfig.Host for bare metal HyperShift")
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}
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}
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for j, env := range envVars {
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switch env.Name {
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case "KUBERNETES_SERVICE_HOST":
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if i.isHypershift && i.isBareMetalHypershift {
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if bareMetalErr != nil {
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envVars[j].Value = apiIntHost
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} else {
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envVars[j].Value = bareMetalHost
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}
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} else {
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envVars[j].Value = apiIntHost
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}
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case "KUBERNETES_SERVICE_PORT":
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if i.isHypershift && i.isAROHCPCluster {
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envVars[j].Value = "7443"
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} else if i.isHypershift && i.isBareMetalHypershift {
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if bareMetalErr != nil {
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envVars[j].Value = apiIntPort
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} else {
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envVars[j].Value = bareMetalPort
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}
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} else {
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envVars[j].Value = apiIntPort
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}
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}
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}
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return envVars
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}
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91154
func (i *InvariantInClusterDisruption) createDeploymentAndWaitToRollout(ctx context.Context, deploymentObj *appsv1.Deployment) error {
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deploymentID := uuid.New().String()
93156
deploymentObj = disruptionlibrary.UpdateDeploymentENVs(deploymentObj, deploymentID, "")
@@ -119,23 +182,14 @@ func (i *InvariantInClusterDisruption) createDeploymentAndWaitToRollout(ctx cont
119182
func (i *InvariantInClusterDisruption) createInternalLBDeployment(ctx context.Context, apiIntHost, apiIntPort string) error {
120183
deploymentObj := resourceread.ReadDeploymentV1OrDie(internalLBDeploymentYaml)
121184
deploymentObj.SetNamespace(i.namespaceName)
122-
deploymentObj.Spec.Template.Spec.Containers[0].Env[0].Value = apiIntHost
123185
// set amount of deployment replicas to make sure it runs on all nodes
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deploymentObj.Spec.Replicas = &i.replicas
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// we need to use the openshift-tests image of the destination during an upgrade.
126188
deploymentObj.Spec.Template.Spec.Containers[0].Image = i.openshiftTestsImagePullSpec
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// Set the correct port for internal API server
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for j, env := range deploymentObj.Spec.Template.Spec.Containers[0].Env {
130-
if env.Name == "KUBERNETES_SERVICE_PORT" {
131-
if i.isHypershift && i.isAROHCPCluster {
132-
deploymentObj.Spec.Template.Spec.Containers[0].Env[j].Value = "7443"
133-
} else {
134-
deploymentObj.Spec.Template.Spec.Containers[0].Env[j].Value = apiIntPort
135-
}
136-
break
137-
}
138-
}
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// Set the correct host and port for internal API server based on cluster type
191+
deploymentObj.Spec.Template.Spec.Containers[0].Env = i.setKubernetesServiceEnvVars(
192+
deploymentObj.Spec.Template.Spec.Containers[0].Env, apiIntHost, apiIntPort)
139193

140194
err := i.createDeploymentAndWaitToRollout(ctx, deploymentObj)
141195
if err != nil {
@@ -335,6 +389,13 @@ func (i *InvariantInClusterDisruption) StartCollection(ctx context.Context, admi
335389
logrus.WithError(err).Warning("Failed to check if ARO HCP, assuming it's not")
336390
i.isAROHCPCluster = false // Assume not ARO HCP on error
337391
}
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393+
// Check if this is a bare metal HyperShift cluster
394+
i.isBareMetalHypershift, err = exutil.IsBareMetalHyperShiftCluster(ctx, managementOC)
395+
if err != nil {
396+
logrus.WithError(err).Warning("Failed to check if bare metal HyperShift, assuming it's not")
397+
i.isBareMetalHypershift = false // Assume not bare metal HyperShift on error
398+
}
338399
}
339400

340401
if len(i.payloadImagePullSpec) == 0 {
@@ -392,15 +453,9 @@ func (i *InvariantInClusterDisruption) StartCollection(ctx context.Context, admi
392453
var apiIntHost string
393454
var apiIntPort string
394455
if i.isHypershift {
395-
parsedURL, err := url.Parse(i.adminRESTConfig.Host)
456+
apiIntHost, apiIntPort, err = i.parseAdminRESTConfigHost()
396457
if err != nil {
397-
return fmt.Errorf("failed to parse adminRESTConfig.Host %q: %v", i.adminRESTConfig.Host, err)
398-
}
399-
apiIntHost = parsedURL.Hostname()
400-
if parsedURL.Port() != "" {
401-
apiIntPort = parsedURL.Port()
402-
} else {
403-
apiIntPort = "6443" // default port
458+
return fmt.Errorf("failed to parse adminRESTConfig.Host: %v", err)
404459
}
405460
} else {
406461
internalAPI, err := url.Parse(infra.Status.APIServerInternalURL)

‎test/extended/util/managed_services.go‎

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@@ -2,6 +2,8 @@ package util
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33
import (
44
"context"
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"fmt"
6+
"strings"
57

68
"github.com/sirupsen/logrus"
79
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -95,3 +97,39 @@ func IsAroHCP(ctx context.Context, namespace string, kubeClient kubernetes.Inter
9597
logrus.Infof("No deployment found with control-plane-operator container in namespace %s", namespace)
9698
return false, nil
9799
}
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// IsBareMetalHyperShiftCluster checks if the HyperShift cluster is running on bare metal
102+
// by checking the platform type of the hosted cluster. It uses kubectl commands to query
103+
// the hosted cluster's platform type and returns true if it's "None" or "Agent".
104+
func IsBareMetalHyperShiftCluster(ctx context.Context, managementOC *CLI) (bool, error) {
105+
// Get the hosted cluster namespace
106+
_, hcpNamespace, err := GetHypershiftManagementClusterConfigAndNamespace()
107+
if err != nil {
108+
return false, fmt.Errorf("failed to get hypershift management cluster config and namespace: %v", err)
109+
}
110+
111+
// Get the first hosted cluster name
112+
clusterNames, err := managementOC.AsAdmin().WithoutNamespace().Run("get").Args(
113+
"-n", hcpNamespace, "hostedclusters", "-o=jsonpath={.items[*].metadata.name}").Output()
114+
if err != nil {
115+
return false, fmt.Errorf("failed to get hosted cluster names: %v", err)
116+
}
117+
118+
if len(clusterNames) == 0 {
119+
return false, fmt.Errorf("no hosted clusters found")
120+
}
121+
122+
// Get the first hosted cluster name
123+
clusterName := strings.Split(strings.TrimSpace(clusterNames), " ")[0]
124+
125+
// Get the platform type of the hosted cluster
126+
platformType, err := managementOC.AsAdmin().WithoutNamespace().Run("get").Args(
127+
"hostedcluster", clusterName, "-n", hcpNamespace, `-ojsonpath={.spec.platform.type}`).Output()
128+
if err != nil {
129+
return false, fmt.Errorf("failed to get hosted cluster platform type: %v", err)
130+
}
131+
132+
// Check if it's bare metal (None or Agent platform)
133+
platformTypeStr := strings.TrimSpace(platformType)
134+
return platformTypeStr == "None" || platformTypeStr == "Agent", nil
135+
}

‎test_baremetal_hypershift_fix.md‎

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# Bare Metal HyperShift API Server Port Fix
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## Problem
4+
The internal LB monitor for bare metal HyperShift clusters was trying to connect to the API server on port 6443, but getting "connection refused" errors. This is because bare metal HyperShift clusters expose the API server via a NodePort service (e.g., port 30172) instead of the standard port 6443.
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## Root Cause
7+
The existing code only handled ARO HCP clusters with a special port (7443), but didn't account for bare metal HyperShift clusters that use NodePort services for API server exposure.
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## Solution
10+
Added detection for bare metal HyperShift clusters and updated the port logic to use the correct NodePort.
11+
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### Changes Made
13+
14+
1. **Added bare metal HyperShift detection**:
15+
- Added `isBareMetalHypershift` field to `InvariantInClusterDisruption` struct
16+
- Used existing `exutil.IsBareMetalHyperShiftCluster()` function to detect bare metal clusters by checking platform type ("None" or "Agent")
17+
18+
2. **Updated port configuration logic**:
19+
- Modified the environment variable setting logic to handle bare metal HyperShift
20+
- For bare metal HyperShift: uses the port from `adminRESTConfig.Host` (which contains the actual NodePort assigned by Kubernetes)
21+
- For ARO HCP: continues to use port 7443
22+
- For other clusters: uses the standard `apiIntPort`
23+
24+
3. **Updated host configuration**:
25+
- Also updated `KUBERNETES_SERVICE_HOST` to use the correct hostname for bare metal HyperShift
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### Code Changes
28+
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```go
30+
// Added field to struct
31+
isBareMetalHypershift bool
32+
33+
// Used existing detection method
34+
i.isBareMetalHypershift, err = exutil.IsBareMetalHyperShiftCluster(ctx, managementOC)
35+
36+
// Updated port logic
37+
if env.Name == "KUBERNETES_SERVICE_PORT" {
38+
if i.isHypershift && i.isAROHCPCluster {
39+
deploymentObj.Spec.Template.Spec.Containers[0].Env[j].Value = "7443"
40+
} else if i.isHypershift && i.isBareMetalHypershift {
41+
// Use NodePort from adminRESTConfig.Host (contains the actual NodePort assigned by Kubernetes)
42+
parsedURL, err := url.Parse(i.adminRESTConfig.Host)
43+
if err != nil {
44+
logrus.WithError(err).Errorf("Failed to parse adminRESTConfig.Host %q for bare metal HyperShift", i.adminRESTConfig.Host)
45+
// If we can't parse the URL, fall back to the standard apiIntPort
46+
deploymentObj.Spec.Template.Spec.Containers[0].Env[j].Value = apiIntPort
47+
} else if parsedURL.Port() != "" {
48+
deploymentObj.Spec.Template.Spec.Containers[0].Env[j].Value = parsedURL.Port()
49+
} else {
50+
// If no port in URL, fall back to the standard apiIntPort
51+
deploymentObj.Spec.Template.Spec.Containers[0].Env[j].Value = apiIntPort
52+
}
53+
} else {
54+
deploymentObj.Spec.Template.Spec.Containers[0].Env[j].Value = apiIntPort
55+
}
56+
}
57+
```
58+
59+
## Testing
60+
The fix should resolve the connection refused errors by ensuring the internal LB monitor uses the correct NodePort (e.g., 30172) instead of the standard API server port (6443) for bare metal HyperShift clusters.
61+
62+
## Example Configuration
63+
For a bare metal HyperShift cluster, the actual NodePort is determined by Kubernetes and will be extracted from the `adminRESTConfig.Host` URL. For example, if the kubeconfig shows:
64+
```yaml
65+
server: https://api.659576d3f92456afe9f5.xxx.xxx.xxx.org:30172
66+
```
67+
68+
The code will extract:
69+
- `KUBERNETES_SERVICE_HOST`: `api.659576d3f92456afe9f5.xxx.xxx.xxx.org`
70+
- `KUBERNETES_SERVICE_PORT`: `30172`
71+
72+
The actual NodePort (30172 in this example) is dynamically assigned by Kubernetes and will vary between clusters.

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