Add more parameters to helm chart

- Helm chart now supports injecting sidecar containers, adding envFrom
instructions to read either configMaps as well as secrets.

- Add sample sidecar to minikube values that prints the event file to
  stdout

Signed-off-by: Raul Gonzales <[email protected]>

Author: gonzalesraul

charts/core-dump-handler/templates/_helpers.tpl

@@ -73,3 +73,21 @@ Basically copied from https://github.com/bitnami/charts/blob/master/bitnami/comm
         {{- tpl (.value | toYaml) .context }}
     {{- end }}
 {{- end -}}
+
+{{- define "core-dump-handler.daemonset.container.volumeMounts" -}}
+- name: host-volume
+  mountPath:  {{ .Values.daemonset.hostDirectory }}
+  mountPropagation: Bidirectional
+- name: core-volume
+  mountPath:  {{ .Values.daemonset.coreDirectory }}
+  mountPropagation: Bidirectional
+{{- if .Values.composer.coreEvents }}
+- name: event-volume
+  mountPath:  {{ .Values.daemonset.eventDirectory }}
+  mountPropagation: Bidirectional
+{{- end }}
+{{- if .Values.daemonset.mountContainerRuntimeEndpoint }}
+- mountPath: {{ .Values.daemonset.hostContainerRuntimeEndpoint }}
+  name: container-runtime
+{{- end }}
+{{- end -}}

charts/core-dump-handler/templates/daemonset.yaml

@@ -10,6 +10,8 @@ spec:
     metadata:
       labels:
         name: {{ .Values.daemonset.label }}
+      annotations:
+        kubectl.kubernetes.io/default-container: "coredump-container"
     spec:
       {{- with .Values.image.pullSecrets }}
       imagePullSecrets:
@@ -28,22 +30,7 @@ spec:
             cpu: {{ .Values.image.limit_cpu }}
         securityContext:
           privileged: true
-        volumeMounts:
-        - name: host-volume
-          mountPath:  {{ .Values.daemonset.hostDirectory }}
-          mountPropagation: Bidirectional
-        - name: core-volume
-          mountPath:  {{ .Values.daemonset.coreDirectory }}
-          mountPropagation: Bidirectional
-        {{- if .Values.composer.coreEvents }}
-        - name: event-volume
-          mountPath:  {{ .Values.daemonset.eventDirectory }}
-          mountPropagation: Bidirectional
-        {{- end }}  
-        {{- if .Values.daemonset.mountContainerRuntimeEndpoint }}
-        - mountPath: {{ .Values.daemonset.hostContainerRuntimeEndpoint }}
-          name: container-runtime
-        {{- end }}
+        volumeMounts: {{ include "core-dump-handler.daemonset.container.volumeMounts" . | nindent 10 }}
         env:
           - name: COMP_FILENAME_TEMPLATE
             value: {{ .Values.composer.filenameTemplate | quote }}
@@ -114,11 +101,28 @@ spec:
           {{- if .Values.daemonset.extraEnvVars }}
           {{ include "core-dump-handler.tplvalues.render" ( dict "value" .Values.daemonset.extraEnvVars "context" $) | nindent 10  }}
           {{- end }}
+        {{- with .Values.daemonset.envFrom }}
+        envFrom:
+          {{- toYaml . | nindent 10 }}
+        {{- end }}
         command: ["/app/core-dump-agent"]
         lifecycle:
           preStop:
             exec:
               command: ["/app/core-dump-agent", "remove"]
+      {{- range .Values.daemonset.sidecarContainers }}
+      - {{ with . -}}
+        securityContext:
+          privileged: true
+        volumeMounts:
+          {{- include "core-dump-handler.daemonset.container.volumeMounts" $ | nindent 10 }}
+          {{- if  .volumeMounts -}}
+          {{- toYaml .volumeMounts | nindent 10 }}
+          {{- end }}
+        {{- $_ := unset . "volumeMounts" -}}
+        {{- toYaml . | nindent 8 -}}
+        {{- end }}
+      {{- end }}
       {{- with .Values.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

charts/core-dump-handler/values.minikube.yaml

@@ -1,12 +1,22 @@
 storageClass: standard
 image:
   tag: latest
-  pullPolicy: Never
 composer:
   logLevel: "Debug"
+  coreEvents: true
 daemonset:
   mountContainerRuntimeEndpoint: true
   hostContainerRuntimeEndpoint: "/var/run/cri-dockerd.sock"
   crioEndpoint: "unix:///var/run/cri-dockerd.sock"
   deployCrioConfig: true
   includeCrioExe: true
+  sidecarContainers:
+  - name: simple-printer
+    image: alpine
+    command:
+    - /bin/sh
+    - -c
+    - |
+      apk --no-cache add inotify-tools
+      cd /var/mnt/core-dump-handler/events
+      inotifywait -mq -e create .| while read directory action file; do cat $file; done

charts/core-dump-handler/values.schema.json

@@ -262,6 +262,12 @@
                 },
                 "extraEnvVars": {
                     "type": "string"
+                },
+                "envFrom": {
+                    "type": "array"
+                },
+                "sidecarContainers": {
+                    "type": "array"
                 }
             },
             "required": [
@@ -333,4 +339,4 @@
             "title": "ServiceAccount"
         }
     }
-}
+}

charts/core-dump-handler/values.yaml

@@ -55,6 +55,8 @@ daemonset:
   s3BucketName: XXX
   s3Region: XXX
   extraEnvVars: ""
+  envFrom: []
+  sidecarContainers: []
 
 serviceAccount:
   create: true