Create k8s asset collector

Dockerfile

@@ -0,0 +1,28 @@
+FROM ubuntu:20.04
+
+RUN mkdir -p /usr/share/inputrunner
+COPY inputrunner /usr/share/inputrunner/inputrunner
+
+RUN mkdir -p /usr/share/inputrunner/data /usr/share/inputrunner/logs && \
+    chown -R root:root /usr/share/inputrunner && \
+    find /usr/share/inputrunner -type d -exec chmod 0755 {} \; && \
+    find /usr/share/inputrunner -type f -exec chmod 0644 {} \; && \
+    chmod 0775 /usr/share/inputrunner/data /usr/share/inputrunner/logs
+
+
+RUN chmod 0755 /usr/share/inputrunner/inputrunner
+RUN for iter in {1..10}; do \
+        apt-get update -y && \
+        DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --yes ca-certificates curl coreutils gawk libcap2-bin xz-utils && \
+        apt-get clean all && \
+        exit_code=0 && break || exit_code=$? && echo "apt-get error: retry $iter in 10s" && sleep 10; \
+    done; \
+    (exit $exit_code)
+
+
+RUN groupadd --gid 1000 inputrunner
+RUN useradd -M --uid 1000 --gid 1000 --groups 0 --home /usr/share/inputrunner inputrunner
+USER inputrunner
+
+WORKDIR /usr/share/inputrunner
+CMD [ "/bin/bash", "-c", "./inputrunner", "run" ]

deploy/inputrunner-kubernetes-manifest.yml

@@ -0,0 +1,140 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: inputrunnerconfig
+  namespace: kube-system
+  labels:
+    k8s-app: inputrunner
+data:
+  inputrunner.yml: |-
+      inputrunner.inputs:
+         - type: assets_k8s
+           period: 600s
+           kube_config: ""
+           asset_types: ["node", "pod"]
+
+      output.elasticsearch:
+         hosts: ['${ELASTICSEARCH_HOST:elasticsearch}:${ELASTICSEARCH_PORT:9200}']
+         username: ${ELASTICSEARCH_USERNAME}
+         password: ${ELASTICSEARCH_PASSWORD}
+         ssl.verification_mode: "none"
+
+      logging.level: info
+      logging.to_files: false
+      logging.to_stderr: true
+      logging.selectors: ["*"]
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: inputrunner
+  namespace: kube-system
+  labels:
+    k8s-app: inputrunner
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      k8s-app: inputrunner
+  template:
+    metadata:
+      labels:
+        k8s-app: inputrunner
+    spec:
+      serviceAccountName: inputrunner
+      hostNetwork: true
+      dnsPolicy: ClusterFirstWithHostNet
+      containers:
+         - name: inputrunner
+           image: michaelkatsoulis/inputrunner:latest 
+           env:
+                  # The basic authentication username used to connect to Elasticsearch
+                  # This user needs the privileges required to publish events to Elasticsearch.
+                  - name: ELASTICSEARCH_USERNAME
+                    value: "elastic"
+                  # The basic authentication password used to connect to Elasticsearch
+                  - name: ELASTICSEARCH_PASSWORD
+                    value: "changeme"
+                  # The Elasticsearch host to communicate with
+                  - name: ELASTICSEARCH_HOST
+                    value: "elasticsearch"
+                  # The Elasticsearch port to communicate with
+                  - name: ELASTICSEARCH_PORT
+                    value: "9200"
+           volumeMounts:
+                  - name: config
+                    mountPath: /usr/share/inputrunner/inputrunner.yml
+                    readOnly: true
+                    subPath: inputrunner.yml
+      volumes:
+        - name: config
+          configMap:
+            defaultMode: 0640
+            name: inputrunnerconfig
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: inputrunner
+  namespace: kube-system
+  labels:
+    k8s-app: inputrunner
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: inputrunner
+  labels:
+    k8s-app: inputrunner
+rules:
+  - apiGroups: [""]
+    resources:
+      - nodes
+      - namespaces
+      - events
+      - pods
+      - services
+      - configmaps
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["extensions"]
+    resources:
+      - replicasets
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["apps"]
+    resources:
+      - statefulsets
+      - deployments
+      - replicasets
+      - daemonsets
+    verbs: ["get", "list", "watch"]
+  - apiGroups:
+      - ""
+    resources:
+      - nodes/stats
+    verbs:
+      - get
+  - apiGroups: [ "batch" ]
+    resources:
+      - jobs
+      - cronjobs
+    verbs: [ "get", "list", "watch" ]
+  # Needed for apiserver
+  - nonResourceURLs:
+      - "/metrics"
+    verbs:
+      - get
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: inputrunner
+subjects:
+- kind: ServiceAccount
+  name: inputrunner
+  namespace: kube-system
+roleRef:
+  kind: ClusterRole
+  name: inputrunner
+  apiGroup: rbac.authorization.k8s.io
+---

input/assets/internal/publish.go

@@ -23,6 +23,7 @@ import (
 	"github.com/elastic/beats/v7/libbeat/beat"
 	"github.com/elastic/elastic-agent-libs/mapstr"
 	stateless "github.com/elastic/inputrunner/input/v2/input-stateless"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
 
 type AssetOption func(beat.Event) beat.Event
@@ -95,3 +96,22 @@ func WithAssetMetadata(value mapstr.M) AssetOption {
 		return e
 	}
 }
+
+func WithNodeData(name, providerId string, startTime *metav1.Time) AssetOption {
+	return func(e beat.Event) beat.Event {
+		e.Fields["kubernetes.node.name"] = name
+		e.Fields["kubernetes.node.providerId"] = providerId
+		e.Fields["kubernetes.node.start_time"] = startTime
+		return e
+	}
+}
+
+func WithPodData(name, uid, namespace string, startTime *metav1.Time) AssetOption {
+	return func(e beat.Event) beat.Event {
+		e.Fields["kubernetes.pod.name"] = name
+		e.Fields["kubernetes.pod.uid"] = uid
+		e.Fields["kubernetes.pod.start_time"] = startTime
+		e.Fields["kubernetes.namespace"] = namespace
+		return e
+	}
+}

input/assets/internal/publish_test.go

@@ -18,14 +18,17 @@
 package internal
 
 import (
-	"testing"
-
 	"github.com/elastic/beats/v7/libbeat/beat"
 	"github.com/elastic/elastic-agent-libs/mapstr"
 	"github.com/elastic/inputrunner/input/testutil"
 	"github.com/stretchr/testify/assert"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"testing"
+	"time"
 )
 
+var startTime = metav1.Time{Time: time.Date(2021, 8, 15, 14, 30, 45, 100, time.Local)}
+
 func TestPublish(t *testing.T) {
 	for _, tt := range []struct {
 		name string
@@ -114,6 +117,29 @@ func TestPublish(t *testing.T) {
 				"asset.metadata": mapstr.M{"foo": "bar"},
 			}},
 		},
+		{
+			name: "with valid node data",
+			opts: []AssetOption{
+				WithNodeData("ip-172-31-29-242.us-east-2.compute.internal", "aws:///us-east-2b/i-0699b78f46f0fa248", &startTime),
+			},
+			expectedEvent: beat.Event{Fields: mapstr.M{
+				"kubernetes.node.name":       "ip-172-31-29-242.us-east-2.compute.internal",
+				"kubernetes.node.providerId": "aws:///us-east-2b/i-0699b78f46f0fa248",
+				"kubernetes.node.start_time": &startTime,
+			}},
+		},
+		{
+			name: "with valid pod data",
+			opts: []AssetOption{
+				WithPodData("nginx", "a375d24b-fa20-4ea6-a0ee-1d38671d2c09", "default", &startTime),
+			},
+			expectedEvent: beat.Event{Fields: mapstr.M{
+				"kubernetes.pod.name":       "nginx",
+				"kubernetes.pod.uid":        "a375d24b-fa20-4ea6-a0ee-1d38671d2c09",
+				"kubernetes.pod.start_time": &startTime,
+				"kubernetes.namespace":      "default",
+			}},
+		},
 	} {
 		t.Run(tt.name, func(t *testing.T) {
 			publisher := testutil.NewInMemoryPublisher()

input/assets/k8s/README.md

@@ -0,0 +1,49 @@
+# K8s Assets Input
+
+## What does it do?
+
+The K8s Assets Input collects data about  resources running on a K8s cluster.
+Information about the following resources is currently collected:
+
+- K8s Nodes
+
+
+## Asset schema
+
+### K8s Nodes
+
+Field | Example |
+------|---------|
+"asset.id": "aws:///us-east-2b/i-0699b78f46f0fa248",
+"asset.ean": "k8s.node:aws:///us-east-2b/i-0699b78f46f0fa248",
+"asset.name": "ip-172-31-29-242.us-east-2.compute.internal",
+"asset.type": "k8s.node",
+"input": {
+    "type": "assets_k8s"
+}
+
+
+In order to run set the following configuration in inputrunner.yml
+
+inputrunner.inputs:
+  - type: assets_k8s
+    period: 600s
+    kube_config: /Users/michaliskatsoulis/go/src/github.com/elastic/inputrunner/kube_config
+
+output.elasticsearch:
+  hosts: ["localhost:9200"]
+  protocol: "https"
+  username: "elastic"
+  password: "changeme"
+  ssl.verification_mode: "none"
+
+
+logging.level: info
+logging.to_files: false
+logging.to_stderr: true
+logging.selectors: ["*"]
+
+
+The kube_config path must contain a kube config file so that if the inputrunner runs as a process anywhere, can access the cluster.
+In case it runs as a pod in the same k8s cluster it needs to monitor, then the kube_config is collected from withing the cluster(inClusterconfig)
+and the values should be left empty.