Ben Vin
016f93ab4f
Add a monorepo for small single-purpose CLI tools that share a common library, so tools reuse TUI primitives and Kubernetes client bootstrapping instead of duplicating them. - common/tui: direction markers, style palette, width-aware padding/layout - common/kube: in-cluster→kubeconfig client loading + core/metrics clients - podgap: live TUI comparing pod requests/limits vs actual usage, with up/down markers showing per-pod change since the last refresh - Makefile auto-discovers tool directories: make <tool> | all | install
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Package kube provides shared Kubernetes client bootstrapping for the tools in
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// benvin-utils: a single loader that works both in-cluster and from a local
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// kubeconfig, plus a helper that returns the core and metrics clients together.
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package kube
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import (
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"fmt"
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"os"
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"path/filepath"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/tools/clientcmd"
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metricsv "k8s.io/metrics/pkg/client/clientset/versioned"
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)
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// LoadConfig resolves a *rest.Config, preferring in-cluster credentials, then
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// the explicit path, then $KUBECONFIG, then ~/.kube/config.
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func LoadConfig(explicit string) (*rest.Config, error) {
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if cfg, err := rest.InClusterConfig(); err == nil {
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return cfg, nil
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}
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path := explicit
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if path == "" {
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path = os.Getenv("KUBECONFIG")
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}
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if path == "" {
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if home, err := os.UserHomeDir(); err == nil {
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path = filepath.Join(home, ".kube", "config")
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}
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}
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cfg, err := clientcmd.BuildConfigFromFlags("", path)
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if err != nil {
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return nil, fmt.Errorf("load kubeconfig %q: %w", path, err)
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}
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return cfg, nil
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}
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// Clients returns the core and metrics clientsets for the resolved config.
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func Clients(explicit string) (kubernetes.Interface, metricsv.Interface, error) {
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cfg, err := LoadConfig(explicit)
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if err != nil {
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return nil, nil, err
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}
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core, err := kubernetes.NewForConfig(cfg)
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if err != nil {
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return nil, nil, fmt.Errorf("core client: %w", err)
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}
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mc, err := metricsv.NewForConfig(cfg)
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if err != nil {
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return nil, nil, fmt.Errorf("metrics client: %w", err)
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}
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return core, mc, nil
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}
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