{"record":{"id":"4462ee2249c1dc60","repo":"kubernetes/kops","slug":"error-running-kubectl-v","errorCode":null,"errorMessage":"error running kubectl: %v","messagePattern":"error running kubectl: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"channels/pkg/channels/kubectlapplier.go","lineNumber":91,"sourceCode":"\t\t}\n\t}\n\n\treturn nil\n}\n\nfunc execKubectl(ctx context.Context, args ...string) (string, error) {\n\tkubectlPath := \"kubectl\" // Assume in PATH\n\tcmd := exec.CommandContext(ctx, kubectlPath, args...)\n\tenv := os.Environ()\n\tcmd.Env = env\n\n\thuman := strings.Join(cmd.Args, \" \")\n\tklog.V(2).Infof(\"Running command: %s\", human)\n\toutput, err := cmd.CombinedOutput()\n\tif err != nil {\n\t\tklog.Infof(\"error running %s\", human)\n\t\tklog.Info(string(output))\n\t\treturn string(output), fmt.Errorf(\"error running kubectl: %v\", err)\n\t}\n\n\treturn string(output), err\n}\n","sourceCodeStart":73,"sourceCodeEnd":96,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/channels/pkg/channels/kubectlapplier.go#L73-L96","documentation":"execKubectl runs a kubectl subprocess with CombinedOutput and wraps any non-zero exit into `error running kubectl: %v`, returning the combined stdout/stderr as the string result and logging both the command and output. It is the low-level executor behind all kubectl invocations in KubectlApplier (apply/replace).","triggerScenarios":"Any `kubectl apply`/`kubectl replace` invocation exits non-zero: kubectl binary not found in PATH, exec failure, or kubectl reporting an API error (403, 404, validation failure, connection refused).","commonSituations":"kubectl not installed in the container/host running kops; KUBECONFIG pointing at the wrong cluster; API server unreachable; RBAC forbidden; `replace` failing on clusterIP: \"\" on some k8s versions (logged but not returned, unlike the final apply).","solutions":["Check the klog output immediately above the error — kops logs the exact command and kubectl's combined output","Run the logged kubectl command manually to reproduce and see the raw message","Install kubectl or fix PATH so `kubectl` resolves","Fix kubeconfig/context/network so kubectl can reach the API server","Resolve the underlying API error (RBAC role bindings, missing resources, manifest validation)"],"exampleFix":"// before (CI image without kubectl)\nFROM alpine\nRUN kops apply ...\n// after\nFROM alpine\nRUN apk add --no-cache curl && curl -LO \"https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl\" && install kubectl /usr/local/bin/","handlingStrategy":"try-catch","validationCode":"// before invoking apply: check kubectl and connectivity\nif _, err := exec.LookPath(\"kubectl\"); err != nil {\n    return fmt.Errorf(\"kubectl missing from PATH: %w\", err)\n}\nout, err := exec.Command(\"kubectl\", \"version\").CombinedOutput()\nif err != nil {\n    return fmt.Errorf(\"kubectl cannot reach cluster: %s\", out)\n}","typeGuard":null,"tryCatchPattern":"out, err := execKubectl(ctx, args...)\nif err != nil {\n    // execKubectl already logged command + combined output\n    return fmt.Errorf(\"kubectl %v: %s: %w\", args, out, err)\n}","preventionTips":["Install kubectl in every environment that runs kops update","Set KUBECONFIG explicitly rather than relying on default paths","Run `kubectl auth can-i --list` to verify RBAC before updates","Capture klog output (the command and combined output are logged on failure)"],"tags":["kubectl","subprocess","exec","kubernetes"],"backgroundTag":"kubectl-command-failed","analyzedSha":"4c8573c808a73d578c5eadc86d410646ea0b0d73","analyzedAt":"2026-09-05T04:13:19.212Z","contentChangedAt":"2026-09-05T04:13:19.212Z","schemaVersion":2},"datasetVersion":"2026-09-12T07:17:12.445Z"}