00-50-resource-configuration.md

Default Resources and Autoscaling Configuration for Kyma Istio Operator

Kyma Istio Operator provides baseline values for the Istio installation. Those values can be overridden with configuration in the Istio custom resource (CR).

Cluster-Based Default Configuration

Istio Controller installs Istio with a configuration that depends in the cluster capabilities. If your cluster has less than 5 total virtual CPU cores or its total memory capacity is less than 10 Gigabytes, the default setup for resources and autoscaling is lighter. If your cluster exceeds both of these thresholds, Istio is installed with the higher resource configuration.

Default Resource Configuration for Larger Clusters

Component		CPU	Memory
Proxy	Limits	1000m	1024Mi
Proxy	Requests	10m	192Mi
Ingress Gateway	Limits	2000m	1024Mi
Ingress Gateway	Requests	100m	128Mi
Pilot	Limits	4000m	2Gi
Pilot	Requests	100m	512Mi
CNI	Limits	500m	1024Mi
CNI	Requests	100m	512Mi

Default Autoscaling Configuration for Larger Clusters

Component	Min replicas	Max replicas
Pilot	2	5
Ingress Gateway	3	10

Default Resource Configuration for Smaller Clusters

Component		CPU	Memory
Proxy	Limits	250m	254Mi
Proxy	Requests	10m	32Mi
Ingress Gateway	Limits	1000m	1024Mi
Ingress Gateway	Requests	10m	32Mi
Pilot	Limits	1000m	1024Mi
Pilot	Requests	50m	128Mi
CNI	Limits	250m	384Mi
CNI	Requests	10m	128Mi

Default Autoscaling Configuration for Smaller Clusters

Component	Min replicas	Max replicas
Pilot	1	1
Ingress Gateway	1	1

CNI Autoscaling

The CNI component is provided as a DaemonSet, meaning that one replica is present on every node of the target cluster.