Update k8s manifests to leverage hints (#1202)

Author: ChrsMark

deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml

@@ -25,6 +25,8 @@ data:
     providers.kubernetes:
       node: ${NODE_NAME}
       scope: node
+      #Uncomment to enable hints' support
+      #hints.enabled: true
     inputs:
       - name: kubernetes-cluster-metrics
         condition: ${kubernetes_leaderelection.leader} == true
@@ -651,11 +653,24 @@ spec:
       serviceAccountName: elastic-agent-standalone
       hostNetwork: true
       dnsPolicy: ClusterFirstWithHostNet
+      # Uncomment if using hints feature
+      #initContainers:
+      #  - name: k8s-templates-downloader
+      #    image: busybox:1.28
+      #    command: ['sh']
+      #    args:
+      #      - -c
+      #      - >-
+      #        mkdir -p /etc/elastic-agent/inputs.d &&
+      #        wget -O - https://github.com/elastic/elastic-agent/archive/8.3.0.tar.gz | tar xz -C /etc/elastic-agent/inputs.d --strip=5 "elastic-agent-main/deploy/kubernetes/elastic-agent-standalone/templates.d"
+      #    volumeMounts:
+      #      - name: external-inputs
+      #        mountPath: /etc/elastic-agent/inputs.d
       containers:
         - name: elastic-agent-standalone
           image: docker.elastic.co/beats/elastic-agent:8.3.0
           args: [
-            "-c", "/etc/agent.yml",
+            "-c", "/etc/elastic-agent/agent.yml",
             "-e",
           ]
           env:
@@ -677,6 +692,8 @@ spec:
               valueFrom:
                 fieldRef:
                   fieldPath: metadata.name
+            - name: STATE_PATH
+              value: "/etc/elastic-agent"
           securityContext:
             runAsUser: 0
           resources:
@@ -687,9 +704,12 @@ spec:
               memory: 400Mi
           volumeMounts:
             - name: datastreams
-              mountPath: /etc/agent.yml
+              mountPath: /etc/elastic-agent/agent.yml
               readOnly: true
               subPath: agent.yml
+            # Uncomment if using hints feature
+            #- name: external-inputs
+            #  mountPath: /etc/elastic-agent/inputs.d
             - name: proc
               mountPath: /hostfs/proc
               readOnly: true
@@ -722,6 +742,9 @@ spec:
           configMap:
             defaultMode: 0640
             name: agent-node-datastreams
+        # Uncomment if using hints feature
+        #- name: external-inputs
+        #  emptyDir: {}
         - name: proc
           hostPath:
             path: /proc

deploy/kubernetes/elastic-agent-standalone/elastic-agent-standalone-daemonset-configmap.yaml

@@ -25,6 +25,8 @@ data:
     providers.kubernetes:
       node: ${NODE_NAME}
       scope: node
+      #Uncomment to enable hints' support
+      #hints.enabled: true
     inputs:
       - name: kubernetes-cluster-metrics
         condition: ${kubernetes_leaderelection.leader} == true

deploy/kubernetes/elastic-agent-standalone/elastic-agent-standalone-daemonset.yaml

@@ -25,11 +25,24 @@ spec:
       serviceAccountName: elastic-agent-standalone
       hostNetwork: true
       dnsPolicy: ClusterFirstWithHostNet
+      # Uncomment if using hints feature
+      #initContainers:
+      #  - name: k8s-templates-downloader
+      #    image: busybox:1.28
+      #    command: ['sh']
+      #    args:
+      #      - -c
+      #      - >-
+      #        mkdir -p /etc/elastic-agent/inputs.d &&
+      #        wget -O - https://github.com/elastic/elastic-agent/archive/%VERSION%.tar.gz | tar xz -C /etc/elastic-agent/inputs.d --strip=5 "elastic-agent-main/deploy/kubernetes/elastic-agent-standalone/templates.d"
+      #    volumeMounts:
+      #      - name: external-inputs
+      #        mountPath: /etc/elastic-agent/inputs.d
       containers:
         - name: elastic-agent-standalone
           image: docker.elastic.co/beats/elastic-agent:%VERSION%
           args: [
-            "-c", "/etc/agent.yml",
+            "-c", "/etc/elastic-agent/agent.yml",
             "-e",
           ]
           env:
@@ -51,6 +64,8 @@ spec:
               valueFrom:
                 fieldRef:
                   fieldPath: metadata.name
+            - name: STATE_PATH
+              value: "/etc/elastic-agent"
           securityContext:
             runAsUser: 0
           resources:
@@ -61,9 +76,12 @@ spec:
               memory: 400Mi
           volumeMounts:
             - name: datastreams
-              mountPath: /etc/agent.yml
+              mountPath: /etc/elastic-agent/agent.yml
               readOnly: true
               subPath: agent.yml
+            # Uncomment if using hints feature
+            #- name: external-inputs
+            #  mountPath: /etc/elastic-agent/inputs.d
             - name: proc
               mountPath: /hostfs/proc
               readOnly: true
@@ -96,6 +114,9 @@ spec:
           configMap:
             defaultMode: 0640
             name: agent-node-datastreams
+        # Uncomment if using hints feature
+        #- name: external-inputs
+        #  emptyDir: {}
         - name: proc
           hostPath:
             path: /proc