[synthetic-monitoring-agent] feat: add support for existing secret

charts/synthetic-monitoring-agent/Chart.yaml

@@ -15,4 +15,4 @@ name: synthetic-monitoring-agent
 sources:
   - https://github.com/grafana/synthetic-monitoring-agent
 type: application
-version: 0.2.0
+version: 0.3.0

charts/synthetic-monitoring-agent/README.md

@@ -1,6 +1,6 @@
 # synthetic-monitoring-agent
 
-![Version: 0.2.0](https://img.shields.io/badge/Version-0.2.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v0.9.3-0-gcd7aadd](https://img.shields.io/badge/AppVersion-v0.9.3--0--gcd7aadd-informational?style=flat-square)
+![Version: 0.3.0](https://img.shields.io/badge/Version-0.3.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: v0.9.3-0-gcd7aadd](https://img.shields.io/badge/AppVersion-v0.9.3--0--gcd7aadd-informational?style=flat-square)
 
 Grafana's Synthetic Monitoring application. The agent provides probe functionality and executes network checks for monitoring remote targets.
 
@@ -28,7 +28,7 @@ Kubernetes: `^1.16.0-0`
 |-----|------|---------|-------------|
 | affinity | object | `{}` | Node affinity for pod assignment. |
 | agent.apiServerAddress | string | `"synthetic-monitoring-grpc.grafana.net:443"` | Default server endpoint for receiving synthetic monitoring checks on Grafana's side. See https://grafana.com/docs/grafana-cloud/synthetic-monitoring/private-probes/#probe-api-server-url for more information. |
-| agent.apiToken | string | `""` | **REQUIRED** API token from Grafana Cloud. |
+| agent.apiToken | string | `""` | API token from Grafana Cloud when secret is created by the chart. |
 | agent.debug | bool | `false` | Enable / disable debug logging on the agent. |
 | agent.enableDisconnect | bool | `false` | Enable / disable the HTTP /disconnect endpoint |
 | agent.verbose | bool | `false` | Enable / disable verbose logging on the agent. |
@@ -54,6 +54,7 @@ Kubernetes: `^1.16.0-0`
 | readinessProbe | object | `{"httpGet":{"path":"/ready","port":"http"}}` | Readiness probe for the agent |
 | replicaCount | int | `1` | Number of replicas to use; ignored if `autoscaling.enabled` is set to `true`. |
 | resources | object | `{}` | Default resources to apply. |
+| secret.existingSecret | string | `""` | Reference an existing secret for API token |
 | securityContext | object | `{"capabilities":{"drop":["ALL"]},"readOnlyRootFilesystem":true,"runAsNonRoot":true,"runAsUser":65534}` | Security context for the container level. |
 | service.annotations | object | `{}` | Annotations for the service |
 | service.port | int | `4050` | Service port. |

charts/synthetic-monitoring-agent/templates/deployment.yaml

@@ -63,7 +63,7 @@ spec:
               valueFrom:
                 secretKeyRef:
                   key: api-token
-                  name: {{ include "synthetic-monitoring-agent.fullname" . }}
+                  name: {{ (tpl .Values.secret.existingSecret .) | default (include "synthetic-monitoring-agent.fullname" .) }}
           name: {{ .Chart.Name }}
           securityContext:
             {{- toYaml .Values.securityContext | nindent 12 }}

charts/synthetic-monitoring-agent/templates/secret.yaml

@@ -1,3 +1,4 @@
+{{- if not .Values.secret.existingSecret }}
 apiVersion: v1
 kind: Secret
 metadata:
@@ -6,4 +7,5 @@ metadata:
     {{- include "synthetic-monitoring-agent.labels" . | nindent 4 }}
 type: Opaque
 data:
-  api-token: {{ required "A valid .Values.agent.apiToken is required!" .Values.agent.apiToken | b64enc }}
+  api-token: {{ .Values.agent.apiToken | b64enc }}
+{{- end }}

charts/synthetic-monitoring-agent/values.yaml

@@ -3,7 +3,7 @@
 # Declare variables to be passed into your templates.
 
 agent:
-  # -- **REQUIRED** API token from Grafana Cloud.
+  # -- API token from Grafana Cloud when secret is created by the chart.
   apiToken: ""
   # -- Default server endpoint for receiving synthetic monitoring checks on Grafana's side.
   # See https://grafana.com/docs/grafana-cloud/synthetic-monitoring/private-probes/#probe-api-server-url for more information.
@@ -148,3 +148,7 @@ affinity: {}
 
 # -- Add dynamic manifests via values:
 extraObjects: []
+
+secret:
+# -- Reference an existing secret for API token
+  existingSecret: ""