The way to Get Began Managing a Kubernetes Cluster With Portainer



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Portainer is among the hottest container administration interfaces. Though Portainer began out with a deal with Docker and Docker Compose, it additionally works with orchestrator-managed clusters together with Docker Swarm and Kubernetes.

On this article, you’ll learn to join Portainer to a Kubernetes cluster. It is possible for you to to make use of Portainer to view and work together with Kubernetes objects resembling Pods, Deployments, and ConfigMaps. Portainer can implement Helm charts and expose fundamental data on the cluster stage as nicely. It’s a viable different to the official dashboard and different choices like Lens for easy Kubernetes administration.

Deploy Portainer to your cluster

Be sure you have entry to a working Kubernetes cluster earlier than persevering with. You’ll be able to provision one utilizing [a managed cloud service] or run your individual regionally utilizing an answer like MicroK8s or Minikube. Additionally, you will have to have Helm put in to simplify the Portainer set up course of.

Add the Portainer repository to Helm utilizing the next instructions:

$ helm repo add portainer https://portainer.github.io/k8s/ 
$ helm repo replace

Subsequent, run one of many following instructions to deploy the Portainer app.

Expose Portainer with a NodePort

$ helm set up --create-namespace -n portainer portainer portainer/portainer

That is the best technique. It is possible for you to to entry Portainer over HTTP utilizing port 30777 on the node working the Portainer Pod. HTTPS site visitors will probably be served on port 30779 utilizing a self-signed certificates. See the Portainer documentation if you wish to present your individual SSL certificates when deploying with this technique.

Expose Portainer with a load balancer

$ helm set up --create-namespace -n portainer portainer portainer/portainer 
    --set service.sort=LoadBalancer

This technique is just like NodePort however you’ll use a load balancer in entrance of your Nodes. Go to port 9000 on the load balancer’s IP to speak with Portainer over HTTP. HTTPS is supported on port 9443.

Expose portainer with an ingress path

helm set up --create-namespace -n portainer portainer portainer/portainer 
  --set service.sort=ClusterIP 
  --set ingress.enabled=true 
  --set ingress.annotations.'kubernetes.io/ingress.class'=nginx 
  --set ingress.annotations."nginx.ingress.kubernetes.io/backend-protocol"=HTTPS 
  --set ingress.hosts[0].host=portainer.instance.com 
  --set ingress.hosts[0].paths[0].path="https://www.howtogeek.com/"

This technique exposes the Portainer by way of an ingress path. You’ll need an Ingress controller resembling NGINX Ingress inside your cluster. Modify the host Y path variables within the command to customise the Portainer route. On this instance, it is possible for you to to entry Portainer by visiting portainer.instance.comafter establishing a correct DNS document.

Establishing an ingress path is one of the simplest ways to serve Portainer in the long term, because it helps load balancing between nodes and permits you to assign a selected area. The NodePort or LoadBalancer choices are simpler choices when you’re experimenting with clusters that wouldn’t have an enter controller out there.

As soon as you’ve got accomplished your deployment, load Portainer in your browser by visiting the Ingress host or the suitable IP handle and port quantity. Fill within the configuration display to create your consumer account.

Portainer settings page image

Portainer is now prepared to make use of along with your Kubernetes cluster – deploying on to Kubernetes routinely discovers your surroundings. Click on the “Begin” button to finish the set up.

carrier image "starting" screen

Including a Kubernetes cluster to an present Portainer set up

You’ll be able to add a Kubernetes cluster to an present Portainer set up. You’ll be able to select to run Portainer off of your host so it does not devour cluster assets.

Get began by logging into your Portainer occasion. Click on the “Environments” hyperlink on the backside of the left sidebar. Click on the blue “Add Atmosphere” button on the prime of the display.

image of adding an environment to Portainer

Subsequent, press the “Kubernetes” tile after which the “Begin Wizard” button on the backside of the display.

image of adding an environment to Portainer

The following display will show the set up directions for the Portainer Kubernetes agent. This element is put in inside your cluster. Portainer communicates with the agent to drag data from Kubernetes and apply the requested actions.

You’ll be able to select between deploying the agent with a NodePort or a LoadBalancer. Choose the suitable tab, after which copy the command proven. Run this in your terminal so as to add the Portainer Agent to your cluster. The Portainer Agent is protected by a digital signature that it receives the primary time the Portainer utility makes contact. The Agent will reject communications from prospects who don’t present the proper signature.

Subsequent, fill within the “Title” and “Atmosphere URL” fields displayed within the Portainer internet UI. You’ll be able to select any identify that identifies your cluster.

Portainer K8s agent setup screen image

In case you are utilizing a NodePort connection, the surroundings URL ought to be port 30778 in your node’s IP handle. For LoadBalancer connections, discover the exterior IP of the load balancer by working kubectl get providers -n portainer. The agent will probably be uncovered on port 9001 on this IP.

$ kubectl get providers -n portainer
NAMESPACE     NAME              TYPE            CLUSTER-IP      EXTERNAL-IP       PORT(S)
portainer     portainer-agent   LoadBalancer    10.245.110.27   139.59.198.245    9001:30343/TCP

Click on the “Join” button to finish your connection. You need to see a inexperienced pop-up alert confirming that the surroundings has been added. Press the “End” button on the backside of the display to return to the checklist of environments.

Utilizing Portainer to handle Kubernetes

The Portainer dwelling display shows your entire configured environments. These will be Kubernetes clusters, native Docker Engine installations, or some other supported endpoints. Click on in your cluster to start out managing it.

image showing different endpoints connected on Portainer

The cluster dashboard display gives an outline of the variety of assets in your cluster. Portainer at present focuses on interactions with namespaces, purposes (their pods and implementations), ConfigMaps and secrets and techniques, and volumes. Offers an abstraction layer on prime of some Kubernetes ideas.

Portainer cluster overview screen image

Click on the Functions tile or sidebar hyperlink to see your working pods and deployments. The display reveals all of the purposes in your cluster, together with the picture they’re utilizing and their exterior URL when an ingress path is configured.

Kubernetes application visualization image with Portainer

You’ll be able to add a brand new utility by importing a Kubernetes manifest file or by clicking the “Add Utility with Type” button to interactively configure your Pods.

carrier image "add a new Kubernetes application" form

Portainer additionally gives a fundamental overview of your cluster’s useful resource utilization. Click on the “Cluster” sidebar merchandise to view the nodes in your cluster and their reminiscence and CPU reservations.

visualization image of using Kubernetes cluster with Portainer

Lastly, the cluster configuration display, accessed by navigating to Cluster > Configuration, controls the Portainer options to allow in your Kubernetes surroundings. You should utilize this to inform Portainer which load balancers, ingress drivers, and storage lessons ought to be out there to customers. Different settings embody the power to vary whether or not to permit extreme useful resource commitments (the place extra assets will be requested than the cluster can present), and enabling the Metrics API to entry extra detailed utilization data. This requires that the Metrics API is already put in in your cluster.

image of a Kubernetes cluster setup with Portainer

Abstract

Portainer is among the hottest container administration interfaces. Fashionable variations of Portainer have built-in help for Kubernetes clusters. You’ll be able to deploy Portainer inside your cluster or use the Portainer agent to attach Kubernetes to an present utility occasion.

As soon as configured, you need to use the Portainer to view and work together with Kubernetes Pods and different objects. This may be extra handy than working advanced Kubectl instructions in your terminal. Portainer permits you to mixture your entire container environments on a single platform, from Kubernetes clusters to single-node Docker installations.


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How to Get Started Managing a Kubernetes Cluster With Portainer