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Enable Pluggable Components - Quickstart

This tutorial demonstrates how to enable pluggable components of KubeSphere both before and after the installation. Refer to the table below for all pluggable components of KubeSphere.

Configuration	Component	Description
`alerting`	KubeSphere Alerting System	You can customize alerting policies for workloads and nodes. After an alerting policy is triggered, alert messages can be sent to your recipients through different channels (for example, email and Slack).
`auditing`	KubeSphere Auditing Log System	Provide a security-relevant chronological set of records, recording the sequence of activities that happen in the platform, initiated by different tenants.
`devops`	KubeSphere DevOps System	Provide an out-of-box CI/CD system based on Jenkins, and automated workflow tools including Source-to-Image and Binary-to-Image.
`events`	KubeSphere Events System	Provide a graphical web console for the exporting, filtering and alerting of Kubernetes events in multi-tenant Kubernetes clusters.
`logging`	KubeSphere Logging System	Provide flexible logging functions for log query, collection and management in a unified console. Additional log collectors can be added, such as Elasticsearch, Kafka and Fluentd.
`metrics_server`	HPA	The Horizontal Pod Autoscaler automatically scales the number of Pods based on needs.
`networkpolicy`	Network policy	Allow network isolation within the same cluster, which means firewalls can be set up between certain instances (Pods).
`kubeedge`	KubeEdge	Add edge nodes to your cluster and run workloads on them.
`openpitrix`	KubeSphere App Store	Provide an app store for Helm-based applications and allow users to manage apps throughout the entire lifecycle.
`servicemesh`	KubeSphere Service Mesh (Istio-based)	Provide fine-grained traffic management, observability and tracing, and visualized traffic topology.
`ippool`	Pod IP Pool	Create Pod IP Pools and assign IP addresses from the Pools to your Pods.
`topology`	Service Topology	Integrate Weave Scope to view service-to-service communication (topology) of your apps and containers.

For more information about each component, see Overview of Enable Pluggable Components.

Note

multicluster is not covered in this tutorial. If you want to enable this feature, you need to set a corresponding value for clusterRole. For more information, see Multi-cluster Management.
Make sure your machine meets the hardware requirements before the installation. Here is the recommendation if you want to enable all pluggable components: CPU ≥ 8 Cores, Memory ≥ 16 G, Disk Space ≥ 100 G.

Enable Pluggable Components before Installation

For most of the pluggable components, you can follow the steps below to enable them. If you need to enable KubeEdge, Pod IP Pools and Service Topology, refer to the corresponding tutorials directly.

Installing on Linux

When you implement multi-node installation of KubeSphere on Linux, you need to create a configuration file, which lists all KubeSphere components.

In the tutorial of Installing KubeSphere on Linux, you create a default file config-sample.yaml. Modify the file by executing the following command:
```
vi config-sample.yaml
```
Note

If you adopt All-in-one Installation, you do not need to create a config-sample.yaml file as you can create a cluster directly. Generally, the all-in-one mode is for users who are new to KubeSphere and look to get familiar with the system. If you want to enable pluggable components in this mode (for example, for testing purpose), refer to the following section to see how pluggable components can be installed after installation.
In this file, enable the pluggable components you want to install by changing false to true for enabled. Here is the complete file for your reference. Save the file after you finish.
Create a cluster using the configuration file:
```
./kk create cluster -f config-sample.yaml
```

Installing on Kubernetes

When you install KubeSphere on Kubernetes, you need to use ks-installer by applying two YAML files as below.

First download the file cluster-configuration.yaml and edit it.
```
vi cluster-configuration.yaml
```
To enable the pluggable component you want to install, change false to true for enabled under the component in this file.

Save this local file and execute the following commands to start installation.

kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.1.1/kubesphere-installer.yaml
   
kubectl apply -f cluster-configuration.yaml

Whether you install KubeSphere on Linux or on Kubernetes, you can check the status of the components you have enabled in the web console of KubeSphere after installation. Go to Components, and you can see an image below:

component-status

Enable Pluggable Components after Installation

The KubeSphere web console provides a convenient way for users to view and operate on different resources. To enable pluggable components after installation, you only need to make few adjustments on the console directly. For those who are accustomed to the Kubernetes command-line tool, kubectl, they will have no difficulty in using KubeSphere as the tool is integrated into the console.

Note

If you need to enable KubeEdge, Pod IP Pools and Service Topology, refer to the corresponding tutorials directly.

Log in to the console as admin. Click Platform in the top-left corner and select Cluster Management.
Click CRDs and enter clusterconfiguration in the search bar. Click the result to view its detail page.

Info

A Custom Resource Definition (CRD) allows users to create a new type of resources without adding another API server. They can use these resources like any other native Kubernetes objects.
In Resource List, click the three dots on the right of ks-installer and select Edit YAML.
In this YAML file, enable the pluggable components you want to install by changing false to true for enabled. After you finish, click Update to save the configuration.
You can use the web kubectl to check the installation process by executing the following command:
```
kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l app=ks-install -o jsonpath='{.items[0].metadata.name}') -f
```
Tip

You can find the web kubectl tool by clicking the hammer icon in the bottom-right corner of the console.

The output will display a message as below if the component is successfully installed.

#####################################################
###              Welcome to KubeSphere!           ###
#####################################################
   
Console: http://192.168.0.2:30880
Account: admin
Password: P@88w0rd
   
NOTES：
  1. After you log into the console, please check the
     monitoring status of service components in
     "Cluster Management". If any service is not
     ready, please wait patiently until all components 
     are up and running.
  2. Please change the default password after login.
   
#####################################################
https://kubesphere.io             20xx-xx-xx xx:xx:xx
#####################################################

In Components, you can see the status of different components.

Tip

If you do not see relevant components in the above image, some Pods may not be ready yet. You can execute kubectl get pod --all-namespaces through kubectl to see the status of Pods.

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