Clusters & Environments
You can add your existing Kubernetes clusters and environments on the Clusters and Environments
section. You must have a super admin access to add a cluster.
Add Cluster:
To add cluster, go to the Clusters & Environments
section of Global Configurations
. Click Add cluster.
Add Clusters Using Server URL & Bearer Token
To add a Kubernetes cluster on Devtron using server url
and the bearer token
, provide the information in the following fields:
Get Cluster Credentials
Prerequisites:
kubectl
must be installed on the bastion.
Note: We recommend to use a self-hosted URL instead of cloud hosted URL. Refer the benefits of self-hosted URL.
You can get the Server URL
& Bearer Token
by running the following command depending on the cluster provider:
If you are using EKS, AKS, GKE, Kops, Digital Ocean managed Kubernetes, run the following command to generate the server URL and bearer token:
Benefits of Self-hosted URL
Disaster Recovery:
It is not possible to edit the server URL of a cloud specific provider. If you're using an EKS URL (e.g.
*****.eu-west-1.elb.amazonaws.com
), it will be a tedious task to add a new cluster and migrate all the services one by one.But in case of using a self-hosted URL (e.g.
clear.example.com
), you can just point to the new cluster's server URL in DNS manager and update the new cluster token and sync all the deployments.
Easy Cluster Migrations:
In case of managed Kubernetes clusters (like EKS, AKS, GKE etc) which is a cloud provider specific, migrating your cluster from one provider to another will result in waste of time and effort.
On the other hand, migration for a self-hosted URL is easy as the URL is of single hosted domain independent of the cloud provider.
Add Clusters Using Kubeconfig
To add clusters using kubeconfig, follow these steps:
First, navigate to the global configurations menu, and then go to "clusters and environment" section.
Click on the
Add cluster
button. In the options provided, choose theFrom kubeconfig
option.Next, either paste the kubeconfig file or browse for it and select the appropriate file.
Afterward, click on the
Get cluster
button. This action will display the cluster details alongside the kubeconfig.
Select the desired cluster and click on
Save
to successfully add the cluster to Devtron.
Note: Please ensure that the kubeconfig file you use has admin permissions
. It is crucial for Devtron to have the necessary administrative privileges; otherwise, it may encounter failures or disruptions during deployments and other operations. Admin permission is essential to ensure the smooth functioning of Devtron and to prevent any potential issues that may arise due to insufficient privileges.
Configure Prometheus (Enable Applications Metrics)
If you want to see application metrics against the applications deployed in the cluster, Prometheus must be deployed in the cluster. Prometheus is a powerful tool to provide graphical insight into your application behavior.
Note: Make sure that you install
Monitoring (Grafana)
from theDevtron Stack Manager
to configure prometheus. If you do not installMonitoring (Grafana)
, then the option to configure prometheus will not be available.
Enable the application metrics to configure prometheus and provide the information in the following fields:
Now, click Save Cluster
to save your cluster on Devtron.
Installing Devtron Agent
Your Kubernetes cluster gets mapped with Devtron when you save the cluster configurations. Now, the Devtron agent must be installed on the added cluster so that you can deploy your applications on that cluster.
When the Devtron agent starts installing, click Details
to check the installation status.
A new window pops up displaying all the details about the Devtron agent.
Add Environment
Once you have added your cluster in the Clusters & Environments
, you can add the environment by clicking Add environment
.
A new environment window pops up.
Click Save
and your environment will be created.
Update Environment
You can also update an environment by clicking the environment.
You can change
Production
andNon-Production
options only.You cannot change the
Environment Name
andNamespace Name
.Make sure to click Update to update your environment.
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