1 files changed, 121 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/k8s_kubelet/kubelet.go b/src/go/collectors/go.d.plugin/modules/k8s_kubelet/kubelet.go
new file mode 100644
index 000000000..8fe7ab867
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/k8s_kubelet/kubelet.go
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package k8s_kubelet
+
+import (
+	_ "embed"
+	"errors"
+	"time"
+
+	"github.com/netdata/netdata/go/go.d.plugin/agent/module"
+	"github.com/netdata/netdata/go/go.d.plugin/pkg/prometheus"
+	"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
+)
+
+//go:embed "config_schema.json"
+var configSchema string
+
+func init() {
+	module.Register("k8s_kubelet", module.Creator{
+		JobConfigSchema: configSchema,
+		Defaults: module.Defaults{
+			// NETDATA_CHART_PRIO_CGROUPS_CONTAINERS        40000
+			Priority: 50000,
+		},
+		Create: func() module.Module { return New() },
+	})
+}
+
+func New() *Kubelet {
+	return &Kubelet{
+		Config: Config{
+			HTTP: web.HTTP{
+				Request: web.Request{
+					URL:     "http://127.0.0.1:10255/metrics",
+					Headers: make(map[string]string),
+				},
+				Client: web.Client{
+					Timeout: web.Duration(time.Second),
+				},
+			},
+			TokenPath: "/var/run/secrets/kubernetes.io/serviceaccount/token",
+		},
+
+		charts:             charts.Copy(),
+		collectedVMPlugins: make(map[string]bool),
+	}
+}
+
+type Config struct {
+	web.HTTP    `yaml:",inline" json:""`
+	UpdateEvery int    `yaml:"update_every" json:"update_every"`
+	TokenPath   string `yaml:"token_path" json:"token_path"`
+}
+
+type Kubelet struct {
+	module.Base
+	Config `yaml:",inline" json:""`
+
+	charts *Charts
+
+	prom prometheus.Prometheus
+
+	collectedVMPlugins map[string]bool // volume_manager_total_volumes
+}
+
+func (k *Kubelet) Configuration() any {
+	return k.Config
+}
+
+func (k *Kubelet) Init() error {
+	if err := k.validateConfig(); err != nil {
+		k.Errorf("config validation: %v", err)
+		return err
+	}
+
+	prom, err := k.initPrometheusClient()
+	if err != nil {
+		k.Error(err)
+		return err
+	}
+	k.prom = prom
+
+	if tok := k.initAuthToken(); tok != "" {
+		k.Request.Headers["Authorization"] = "Bearer " + tok
+	}
+
+	return nil
+}
+
+func (k *Kubelet) Check() error {
+	mx, err := k.collect()
+	if err != nil {
+		k.Error(err)
+		return err
+	}
+	if len(mx) == 0 {
+		return errors.New("no metrics collected")
+	}
+	return nil
+}
+
+func (k *Kubelet) Charts() *Charts {
+	return k.charts
+}
+
+func (k *Kubelet) Collect() map[string]int64 {
+	mx, err := k.collect()
+
+	if err != nil {
+		k.Error(err)
+		return nil
+	}
+
+	return mx
+}
+
+func (k *Kubelet) Cleanup() {
+	if k.prom != nil && k.prom.HTTPClient() != nil {
+		k.prom.HTTPClient().CloseIdleConnections()
+	}
+}