feat: Add option to inject sidecars into Node Pods (SeleniumHQ#1938)

* Add option to inject sidecars into Node Pods

* Add example to add sidecar

Author: marcusalb

charts/selenium-grid/README.md

@@ -61,6 +61,14 @@ Once you have a new chart version, you can update your selenium-grid running:
 helm upgrade selenium-grid docker-selenium/selenium-grid
 ```
 
+If needed, you can add sidecars for your browser nodes by running:
+
+```bash
+helm upgrade selenium-grid docker-selenium/selenium-grid --set 'firefoxNode.enabled=true' --set-json 'firefoxNode.sidecars=[{"name":"my-sidecar","image":"my-sidecar:latest","imagePullPolicy":"IfNotPresent","ports":[{"containerPort":8080, "protocol":"TCP"}],"resources":{"limits":{"memory": "128Mi"},"requests":{"cpu": "100m"}}}]'
+```
+
+Note: the parameter used for --set-json is just an example, please refer to [Container Spec](https://www.devspace.sh/component-chart/docs/configuration/containers) for an overview of usable parameters.
+
 ## Uninstalling Selenium Grid release
 
 To uninstall:

charts/selenium-grid/templates/_helpers.tpl

@@ -165,6 +165,9 @@ template:
       {{- with .node.livenessProbe }}
         livenessProbe: {{- toYaml . | nindent 10 }}
       {{- end }}
+    {{- if .node.sidecars }}
+      {{- toYaml .node.sidecars | nindent 6 }}
+    {{- end }}
   {{- if or .Values.global.seleniumGrid.imagePullSecret .node.imagePullSecret }}
     imagePullSecrets:
       - name: {{ default .Values.global.seleniumGrid.imagePullSecret .node.imagePullSecret }}

charts/selenium-grid/values.yaml

@@ -479,6 +479,12 @@ chromeNode:
     # browserVersion: '91.0' # Optional. Only required when supporting multiple versions of browser in your Selenium Grid.
     unsafeSsl : 'true' # Optional
 
+  # It is used to add a sidecars proxy in the same pod of the browser node.
+  # It means it will add a new container to the deployment itself.
+  # It should be set using the --set-json option
+  sidecars: []
+
+
 # Configuration for firefox nodes
 firefoxNode:
   # Enable firefox nodes
@@ -593,6 +599,11 @@ firefoxNode:
     url: '{{ include "seleniumGrid.graphqlURL" . }}'
     browserName: firefox
 
+  # It is used to add a sidecars proxy in the same pod of the browser node.
+  # It means it will add a new container to the deployment itself.
+  # It should be set using the --set-json option
+  sidecars: []
+
 # Configuration for edge nodes
 edgeNode:
   # Enable edge nodes
@@ -708,5 +719,10 @@ edgeNode:
     browserName: MicrosoftEdge
     sessionBrowserName: 'msedge'
 
+  # It is used to add a sidecars proxy in the same pod of the browser node.
+  # It means it will add a new container to the deployment itself.
+  # It should be set using the --set-json option
+  sidecars: []
+
 # Custom labels for k8s resources
 customLabels: {}