ACS limits and quotas - Container Compute Service - Alibaba Cloud Documentation Center

This topic describes the quotas and limits on using Container Compute Service (ACS), including cluster configuration limits, cluster capacity limits, and concurrency. This topic also describes how to apply for quota increases.

Overview

Before you use Container Compute Service (ACS), take note of the following limits:

After you create an ACS cluster, you cannot perform the following operations on the cluster:
- Change the virtual private cloud (VPC) where the cluster resides.
- Change the network plug-in of the cluster.
- Change the volume plug-in of the cluster.
- Migrate applications across namespaces.
Limits on access to control plane components:
Bandwidth limits apply when you access the control plane components of a cluster, including kube-apiserver and etcd, by calling API operations or by using the CLI. If you read a large number of cluster events at a time, bandwidth throttling may be triggered and you may fail to read the events. We recommend that you query cluster events by using the Kubernetes event center. To use the Kubernetes event center, go to the ACS console and choose Operations > Event Center. Alternatively, you can add paging parameters, such as --chunk-size=500, to the API request or command lines to reduce the number of events to be read.

Quota

Type	Upper limit	Default limit	Adjustable
Total number of all ACS clusters within an Alibaba Cloud account	20	3	Go to the Quota Center. Select the Number of ACS Clusters quota. Note If the upper limit does not meet your requirements, submit a ticket to contact the technical support team to increase the upper limit. When you submit the ticket, select Container Service for Kubernetes from the Product Catalog drop-down list.
Total number of pay-as-you-go and scalable vCores in a region	30000 vCPU	100 vCPU	Go to the Quota Center. Select the region that you want to manage and increase the quota. Note If the upper limit does not meet your requirements, submit a ticket to contact the technical support team to increase the upper limit. When you submit the ticket, select Container Service for Kubernetes from the Product Catalog drop-down list.

Capacity limits

Type	Upper limit	Default limit	Adjustable
etcd capacity	8 GB	2 GB	N/A
Maximum etcd capacity for each type of object	800 MB	200 MB	N/A
Pod	300,000	2,000	If the number of pods reaches 2,500, new creation requests will be rejected. Submit a ticket to contact the technical support team and apply for a quota increase.
Service	10,000	2,000	The default limit is the same as the default limit of pods. If the upper limit is reached, new creation requests will be rejected. Submit a ticket to contact the technical support team and apply for a quota increase.
ConfigMap	30,000	3,000	The default upper limit is 3,000, which is 1.5 times the default upper limit of pods. If the upper limit is reached, new creation requests will be rejected. Submit a ticket to contact the technical support team and apply for a quota increase.
Secret	30,000	3,000
PVC	300,000	3,000
PV	300,000	3,000
Single-type custom resource	300,000	10,000	The default upper limit of custom resources that belong to the same type is 10,000. Submit a ticket to contact the technical support team and apply for a quota increase.
CustomResourceDefinition (CRD)	500,000	100,000	N/A

Concurrency limits

Note

Queries per second (QPS) refers to the number of requests received per second.

Type	Upper limit	Default limit	Adjustable
QPS for listing all pods	1	1	Frequently listing all pods may overload the Kubernetes control plane. You can add `selectors` or `namespaces` to the code to reduce the number of pods in a single list operation.
Pod Create QPS	300	30	A 429 status code is returned if the QPS exceeds 30. Submit a ticket to contact the technical support team and apply for a quota increase.
Pod Delete QPS	300	30
Pod Patch QPS	300	30
Pod Update QPS	300	30
Service write QPS	50	5	A 429 status code is returned if the QPS exceeds 5. Submit a ticket to contact the technical support team and apply for a quota increase.
Lease Update QPS	500	100	A 429 status code is returned if the QPS exceeds 100. Submit a ticket to contact the technical support team and apply for a quota increase.
Configmap Update QPS	500	100
Endpoint Update QPS	500	100
QPS for other creation requests	300	50	A 429 status code is returned if the QPS exceeds 50. Submit a ticket to contact the technical support team and apply for a quota increase.
QPS for other deletion requests	300	50
QPS for other patching requests	300	50
QPS for other update requests	300	50

Quota limits on underlying cloud resources

Category	Item	Default limit	Adjustable
Limits on VPCs	Maximum number of custom routes that can be created in each route table (excluding dynamic routes)	200	You can increase the quota by performing the following operations: Go to the Quota Management page to request an increase. For more information, see Manage VPC quotas. Go to the Quota Center page to submit a quota increase request. For more information, see Request a quota increase.
	Maximum number of dynamic routes in each route table	500
	Maximum number of vSwitches that can be created in each VPC	150	You can increase the quota by performing the following operations: Go to the Quota Management page to apply for a quota increase. For further details, see Manage VPC quotas. Go to the Quota Center page to submit a quota increase request. For more information, see Request a Quota Increase.
	Maximum number of VPCs that can be created in each region	10	You can increase the quota by performing the following operations: Go to the Quota Management page to apply for a quota increase. For more information, see Manage VPC quotas. Go to the Quota Center to submit a request for a quota increase. For more information, see Request a Quota Increase.
	Maximum number of private IP addresses that can be used by cloud resources in each VPC	300,000 Note If an Elastic Compute Service (ECS) instance has only one private IP address, it uses only one network address. If an ECS instance is associated with multiple elastic network interfaces (ENIs), or multiple IP addresses are assigned to an ENI of an ECS instance, the number of network addresses used by the ECS instance equals the total number of IP addresses assigned to the ENIs associated with the ECS instance.	N/A
	Maximum number of private IP addresses that can be contained in a security group of the VPC type	Limits on basic security groups: 6,000 Note You can view the quota in the Quota Center console. If more than 6,000 private IP addresses that are assigned to ECS instances require mutual access over the internal network, you can assign the ECS instances to multiple security groups and allow mutual access between ECS instances in the security groups. Limits on advanced security groups: 65,536	N/A
	Maximum number of secondary ENIs that can be created in an account	You can view the limit in the Quota Center console.	You can log on to the Quota Center console to apply for a quota increase.
	Maximum number of EIPs that each Alibaba Cloud account can apply for	20	You can log on to the Quota Center console to apply for a quota increase.
Server Load Balancer (SLB) limits	Maximum number of CLB instances that can be created by each Alibaba Cloud account	30	You can request a quota increase by using one of the following methods: Go to the Quota Management page in the CLB console, find the quota slb_quota_instances_num, and then click Apply in the Actions column. For more information, see Manage quotas. Log on to the Quota Center console and request a quota increase. For more information, see Manage CLB quotas.
	Maximum number of backend servers that can be added to a CLB instance	200	You can request a quota increase by using one of the following methods: Go to the Quota Management page in the CLB console, find the quota slb_quota_backendservers_num, and then click Apply in the Actions column. For more information, see Manage quotas. Log on to the Quota Center console and request a quota increase. For more information, see Manage CLB quotas.
	Maximum number of listeners that can be added to a CLB instance	50	You can request a quota increase by using one of the following methods: Go to the Quota Management page in the CLB console, find the quota slb_quota_listeners_num, and then click Apply in the Actions column. For more information, see Manage quotas. Log on to the Quota Center console and request a quota increase. For more information, see Manage CLB quotas.
Disk limits	Maximum number of pay-as-you-go disks in all regions within an Alibaba Cloud account	You can view the limit in the Quota Center console.	Submit a ticket to apply for a quota increase.
Disk limits	Total capacity of all pay-as-you-go data disks within an Alibaba Cloud account	This quota varies based on the number of ECS instances within the account, the regions in which the ECS instances reside, and the disk types that the ECS instances use. You can view the limit in the Quota Center console. For more information, see View and increase instance quotas.	Submit a ticket to apply for a quota increase.