adding configmaps

README.md

@@ -11,7 +11,7 @@ Given this, I'm going to demonstrate how to provision a (near, as storage is sti
 ## (Very) Important notes
 
 * By default, `ES_JAVA_OPTS` is set to `-Xms256m -Xmx256m`. This is a *very low* value but many users, i.e. `minikube` users, were having issues with pods getting killed because hosts were out of memory.
-You can change this yourself in the deployment descriptors available in this repository.
+You can change this yourself in the `es-config.yaml` ConfigMap available in this repository.
 
 * As of the moment, Kubernetes pod descriptors use an `emptyDir` for storing data in each data node container. This is meant to be for the sake of simplicity and should be adapted according to your storage needs.
 
@@ -31,13 +31,17 @@ Providing your own version of [the images automatically built from this reposito
 ```
 kubectl create -f es-discovery-svc.yaml
 kubectl create -f es-svc.yaml
+kubectl create -f es-config.yaml
+kubectl create -f es-master-config.yaml
 kubectl create -f es-master.yaml
 ```
 
 Wait until `es-master` deployment is provisioned, and
 
 ```
+kubectl create -f es-client-config.yaml
 kubectl create -f es-client.yaml
+kubectl create -f es-data-config.yaml
 kubectl create -f es-data.yaml
 ```
 Now, I leave up to you how to validate the cluster, but a first step is to wait for containers to be in the `Running` state and check Elasticsearch master logs:

es-client-config.yaml

@@ -0,0 +1,8 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: es-client-config
+data:
+  NODE_MASTER: "false"
+  NODE_DATA: "false"
+  HTTP_ENABLE: "true"

es-client.yaml

@@ -39,16 +39,31 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: metadata.namespace
-        - name: "CLUSTER_NAME"
-          value: "myesdb"
+        - name: CLUSTER_NAME
+          valueFrom:
+            configMapKeyRef:
+              name: es-config
+              key: CLUSTER_NAME
+        - name: ES_JAVA_OPTS
+          valueFrom:
+            configMapKeyRef:
+              name: es-config
+              key: ES_JAVA_OPTS
         - name: NODE_MASTER
-          value: "false"
+          valueFrom:
+            configMapKeyRef:
+              name: es-client-config
+              key: NODE_MASTER
         - name: NODE_DATA
-          value: "false"
+          valueFrom:
+            configMapKeyRef:
+              name: es-client-config
+              key: NODE_DATA
         - name: HTTP_ENABLE
-          value: "true"
-        - name: "ES_JAVA_OPTS"
-          value: "-Xms256m -Xmx256m"
+          valueFrom:
+            configMapKeyRef:
+              name: es-client-config
+              key: HTTP_ENABLE
         ports:
         - containerPort: 9200
           name: http

es-config.yaml

@@ -0,0 +1,7 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: es-config
+data:
+  CLUSTER_NAME: "myesdb"
+  ES_JAVA_OPTS: "-Xms256m -Xmx256m"

es-data-config.yaml

@@ -0,0 +1,8 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: es-data-config
+data:
+  NODE_MASTER: "false"
+  NODE_INGEST: "false"
+  HTTP_ENABLE: "false"

es-data.yaml

@@ -39,16 +39,31 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: metadata.namespace
-        - name: "CLUSTER_NAME"
-          value: "myesdb"
+        - name: CLUSTER_NAME
+          valueFrom:
+            configMapKeyRef:
+              name: es-config
+              key: CLUSTER_NAME
+        - name: ES_JAVA_OPTS
+          valueFrom:
+            configMapKeyRef:
+              name: es-config
+              key: ES_JAVA_OPTS
         - name: NODE_MASTER
-          value: "false"
+          valueFrom:
+            configMapKeyRef:
+              name: es-data-config
+              key: NODE_MASTER
         - name: NODE_INGEST
-          value: "false"
+          valueFrom:
+            configMapKeyRef:
+              name: es-data-config
+              key: NODE_INGEST
         - name: HTTP_ENABLE
-          value: "false"
-        - name: "ES_JAVA_OPTS"
-          value: "-Xms256m -Xmx256m"
+          valueFrom:
+            configMapKeyRef:
+              name: es-data-config
+              key: HTTP_ENABLE
         ports:
         - containerPort: 9300
           name: transport

es-master-config.yaml

@@ -0,0 +1,10 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: es-master-config
+data:
+  NUMBER_OF_MASTERS: "2"
+  NODE_MASTER: "true"
+  NODE_INGEST: "false"
+  NODE_DATA: "false"
+  HTTP_ENABLE: "false"

es-master.yaml

@@ -39,20 +39,41 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: metadata.namespace
-        - name: "CLUSTER_NAME"
-          value: "myesdb"
-        - name: "NUMBER_OF_MASTERS"
-          value: "2"
+        - name: CLUSTER_NAME
+          valueFrom:
+            configMapKeyRef:
+              name: es-config
+              key: CLUSTER_NAME
+        - name: ES_JAVA_OPTS
+          valueFrom:
+            configMapKeyRef:
+              name: es-config
+              key: ES_JAVA_OPTS
+        - name: NUMBER_OF_MASTERS
+          valueFrom:
+            configMapKeyRef:
+              name: es-master-config
+              key: NUMBER_OF_MASTERS
         - name: NODE_MASTER
-          value: "true"
+          valueFrom:
+            configMapKeyRef:
+              name: es-master-config
+              key: NODE_MASTER
         - name: NODE_INGEST
-          value: "false"
+          valueFrom:
+            configMapKeyRef:
+              name: es-master-config
+              key: NODE_INGEST
         - name: NODE_DATA
-          value: "false"
+          valueFrom:
+            configMapKeyRef:
+              name: es-master-config
+              key: NODE_DATA
         - name: HTTP_ENABLE
-          value: "false"
-        - name: "ES_JAVA_OPTS"
-          value: "-Xms256m -Xmx256m"
+          valueFrom:
+            configMapKeyRef:
+              name: es-master-config
+              key: HTTP_ENABLE
         ports:
         - containerPort: 9300
           name: transport