(Optional) Running Amazon AppConfig as a DaemonSet in Amazon EKS - Amazon AppConfig
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(Optional) Running Amazon AppConfig as a DaemonSet in Amazon EKS

With Amazon EKS, you can run Amazon AppConfig Agent as a sidecar, which results in one agent container per application pod. Or, if you prefer, you can run Amazon AppConfig Agent as a DaemonSet, which results in one agent container per node in your cluster.

Note

If you run Amazon AppConfig Agent as a DaemonSet, the agent runs in a separate pod, which means you can't access it with calls to localhost. You must inject or otherwise discover the agent pod's IP address in order to call it.

To run Amazon AppConfig Agent as a DaemonSet, create a manifest file with the following contents. Replace highlighted text with details for your application and environment. For Amazon Web Services Region, specify an Amazon Web Services Region code (for example, us-west-1). 

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: aws-appconfig-agent
  namespace: my_namespace
  labels:
    app: my_application_label
spec:
   selector:
    matchLabels:
      app: my_application_label
  template:
    metadata:
      labels:
        app: my_application_label
    spec:
      containers:
      - name: aws-appconfig-agent
        image: public.ecr.aws/aws-appconfig/aws-appconfig-agent:2.x
        ports:
        - name: http
          containerPort: 2772
          protocol: TCP
        env:
        - name: SERVICE_REGION
          value: Amazon Web Services Region
        imagePullPolicy: IfNotPresent
      # set a high priority class to ensure the agent is running on every node
      priorityClassName: system-node-critical

Run the following command to apply the Amazon AppConfig Agent DaemonSet to your cluster. Replace aws_appconfig_agent_daemonset with the name of your DaemonSet manifest.

kubectl apply -f aws_appconfig_agent_daemonset.yml