Install Portainer Agent on your Kubernetes environment

Introduction

Portainer consists of two elements, the Portainer Server and the Portainer Agent. Both elements run as lightweight containers on Kubernetes. This document will outline how to install the Portainer Agent on your cluster and how to connect to it from your Portainer Server instance. If you do not have a working Portainer Server instance yet, please refer to the Portainer Server installation guide first.

To get started, you will need:

• A working and up to date Kubernetes cluster.

• Access to run kubectl commands on your cluster.

• Cluster Admin rights on your Kubernetes cluster. This is so Portainer can create the necessary ServiceAccount and ClusterRoleBinding for it to access the Kubernetes cluster.

The installation instructions also make the following assumption about your environment:

• Your environment meets our requirements. While Portainer may work with other configurations, it may require configuration changes or have limited functionality.

• You will be using the portainer namespace for Portainer.

• You have not set a custom AGENT_SECRET on your Portainer Server instance. If you have, you will need to provide that secret to your agent by adding it to the YAML file within the agent deployment definition:

  env:

  - name: AGENT_SECRET

  value: yoursecret

Deployment

To deploy Portainer Agent within a Kubernetes cluster you can use our provided YAML manifests.

Helm charts for agent-only deployments will be available soon.

From the menu select Environments then click Add environment.

Select the Kubernetes option and click Start Wizard. Select the Agent option and choose the tab that matches your configuration (Kubernetes via load balancer or Kubernetes via node port). Copy the command, then run it on the control node of your Kubernetes cluster.

Make sure you run this command on your Kubernetes node before continuing.

The deployment command will return something similar to this:

namespace/portainer created
serviceaccount/portainer-sa-clusteradmin created
clusterrolebinding.rbac.authorization.k8s.io/portainer-crb-clusteradmin created
service/portainer-agent created
service/portainer-agent-headless created
deployment.apps/portainer-agent created

To validate that the agent is running, use this command:

 kubectl get pods --namespace=portainer

The result should look something like this:

NAME                               READY   STATUS    RESTARTS   AGE
portainer-agent-5988b5d966-bvm9m   1/1     Running   0          15m

Once the Portainer Agent has been successfully deployed on the cluster, you can complete the rest of the environment configuration.

Completing the configuration

Regardless of the method used, once the agent is running on the Kubernetes host, you must complete the appropriate environmental details.

Only do this once for your environment, regardless of how many nodes are in the cluster. You do not need to add each node as an individual environment in Portainer. Adding just one node will allow Portainer to manage the entire cluster.

Field/Option	Overview
Name	Give the environment a descriptive name.
Environment address	Define the IP address or name used to connect to the environment (the Kubernetes host) and specify the port if required (30778 when using NodePort; 9001 when using Load Balancer).

As an optional step you can expand the More settings section and categorize the environment by adding it to a group or tagging it for better searchability.

When you're ready, click Connect. If you have other environments to configure click Next to proceed, otherwise click Close to return to the list of environments.