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Enable Pluggable Components — Overview

KubeSphere has decoupled some core feature components since v2.1.0. These components are designed to be pluggable which means you can enable them either before or after installation. By default, KubeSphere will be deployed with a minimal installation if you do not enable them.

Different pluggable components are deployed in different namespaces. You can enable any of them based on your needs. It is highly recommended that you install these pluggable components to discover the full-stack features and capabilities provided by KubeSphere.

For more information about how to enable each component, see respective tutorials in this chapter.

Resource Requirements

Before you enable pluggable components, make sure you have enough resources in your environment based on the tables below. Otherwise, components may crash due to a lack of resources.

Note

The following request and limit of CPU and memory resources are required by a single replica.

KubeSphere App Store

Namespace	openpitrix-system
CPU Request	0.3 core
CPU Limit	None
Memory Request	300 MiB
Memory Limit	None
Installation	Optional
Notes	Provide an App Store with application lifecycle management. The installation is recommended.

KubeSphere DevOps System

Namespace	kubesphere-devops-system	kubesphere-devops-system
Pattern	All-in-One installation	Multi-node installation
CPU Request	34 m	0.47 core
CPU Limit	None	None
Memory Request	2.69 G	8.6 G
Memory Limit	None	None
Installation	Optional	Optional
Notes	Provide one-stop DevOps solutions with Jenkins pipelines and B2I & S2I.	The memory of one of the nodes must be larger than 8 G.

KubeSphere Monitoring System

Namespace	kubesphere-monitoring-system	kubesphere-monitoring-system	kubesphere-monitoring-system
Sub-component	2 x Prometheus	3 x Alertmanager	Notification Manager
CPU Request	100 m	10 m	100 m
CPU Limit	4 cores	None	500 m
Memory Request	400 MiB	30 MiB	20 MiB
Memory Limit	8 GiB	None	1 GiB
Installation	Required	Required	Required
Notes	The memory consumption of Prometheus depends on the cluster size. 8 GiB is sufficient for a cluster with 200 nodes/16,000 Pods.	-	-

Note

The KubeSphere monitoring system is not a pluggable component. It is installed by default. The resource request and limit of it are also listed on this page for your reference as it is closely related to other components such as logging.

KubeSphere Logging System

Namespace	kubesphere-logging-system	kubesphere-logging-system	kubesphere-logging-system	kubesphere-logging-system
Sub-component	3 x Elasticsearch	fluent bit	kube-events	kube-auditing
CPU Request	50 m	20 m	90 m	20 m
CPU Limit	1 core	200 m	900 m	200 m
Memory Request	2 G	50 MiB	120 MiB	50 MiB
Memory Limit	None	100 MiB	1200 MiB	100 MiB
Installation	Optional	Required	Optional	Optional
Notes	An optional component for log data storage. The internal Elasticsearch is not recommended for the production environment.	The log collection agent. It is a required component after you enable logging.	Collecting, filtering, exporting and alerting of Kubernetes events.	Collecting, filtering and alerting of Kubernetes and KubeSphere auditing logs.

KubeSphere Alerting and Notification

Namespace	kubesphere-alerting-system
CPU Request	0.08 core
CPU Limit	None
Memory Request	80 M
Memory Limit	None
Installation	Optional
Notes	Alerting and Notification need to be enabled at the same time.

KubeSphere Service Mesh

Namespace	istio-system
CPU Request	1 core
CPU Limit	None
Memory Request	3.5 G
Memory Limit	None
Installation	Optional
Notes	Support grayscale release strategies, traffic topology, traffic management and distributed tracing.

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