This topic describes how to create a managed Kubernetes cluster in the Container Service for Kubernetes (ACK) console.
The following example shows how to create a managed Kubernetes cluster. Default values and minimal configurations are used in specific settings.
For more information about the limits of ACK clusters, see Create an ACK managed cluster.
- Log on to the ACK console.
- In the left-side navigation pane of the ACK console, click Clusters.
- In the upper-right corner of the Clusters page, click Create Kubernetes Cluster.
- Set the parameters.
Default values are used for most parameters in this example. The following table describes the parameters.
- Set the parameters on the Cluster Configurations wizard page.
Parameter Description Cluster NameEnter a name for the cluster.Note The name must be 1 to 63 characters in length, and can contain digits, letters, and hyphens (-). Cluster Specification
Select a cluster type. You can select Standard edition or Professional.
Select a region to deploy the cluster.
All ResourcesMove the pointer over All Resources at the top of the page and select the resource group that you want to use. After you select a resource group, virtual private clouds (VPCs) and vSwitches are filtered based on the selected resource group. When you create a cluster, only the VPCs and vSwitches that belong to the selected resource group are displayed in the console.
All Resources is selected in this example.
Use the default setting.
The Docker runtime is selected in this example. For more information about the differences among Docker, containerd, and Sandboxed-Container, see Comparison of Docker, containerd, and Sandboxed-Container.
Set the virtual private cloud (VPC) where you want to deploy the cluster.Select a VPC to deploy the cluster. Standard VPCs and shared VPCs are supported.
Note ACK clusters support only VPCs. You can select a VPC from the drop-down list. If no VPC is available, click Create VPC to create one. For more information, see Create and manage a VPC.
- Shared VPC: The owner of a VPC (resource owner) can share the vSwitches in the VPC with other accounts in the same organization.
- Standard VPC: The owner of a VPC (resource owner) cannot share the vSwitches in the VPC with other accounts.
You can select vSwitches that are deployed in different zones. If no vSwitch is available, click Create vSwitch to create one. For more information, see Work with vSwitches.
By default, Flannel is selected. For more information about Flannel and Terway, see Work with Terway.
IP Addresses per Node
The default value is 64.If you select Flannel as the network plug-in, you must set IP Addresses per Node.Note
- IP Addresses per Node specifies the maximum number of IP addresses that can be assigned to each node. We recommend that you use the default value.
- After you select the VPC and specify the number of IP addresses per node, recommended values are automatically generated for Pod CIDR Block and Service CIDR. The system also provides the maximum number of nodes that can be deployed in the cluster and the maximum number of pods that can be deployed on each node. You can modify the values based on your business requirements.
Pod CIDR Block
If you select Flannel as the network plug-in, you must set Pod CIDR Block.
The CIDR block specified by Pod CIDR Block cannot overlap with that of the VPC or those of the existing clusters in the VPC. The CIDR block cannot be modified after the cluster is created. The Service CIDR block cannot overlap with the pod CIDR block. For more information about how to plan CIDR blocks for an ACK cluster, see Plan CIDR blocks for an ACK cluster.
Set Service CIDR. The CIDR block specified by Service CIDR cannot overlap with that of the VPC or those of the existing clusters in the VPC. The CIDR block cannot be modified after the cluster is created. The Service CIDR block cannot overlap with the pod CIDR block. For more information about how to plan CIDR blocks for an ACK cluster, see Plan CIDR blocks for an ACK cluster.
By default, Configure SNAT for VPC is selected.
By default, an ACK cluster cannot access the Internet. If the VPC that you select for the cluster cannot access the Internet, you can select Configure SNAT for VPC. This way, ACK will create a NAT gateway and configure SNAT rules to enable Internet access for the VPC.
Access to API ServerBy default, an internal-facing SLB instance is created for the Kubernetes API server of the cluster. You can modify the specification of the SLB instance. For more information, see Instance types and specificationsNotice If you delete the SLB instance, you cannot access the Kubernetes API server of the cluster.
By default, Expose API Server with EIP is not selected. The default setting is used in this example.Select or clear Expose API Server with EIP. The ACK API server provides multiple HTTP-based RESTful APIs, which can be used to create, delete, modify, query, and monitor resources, such as pods and Services.
- If you select this check box, an elastic IP address (EIP) is created and associated with an SLB instance. Port 6443 used by the API server is opened on master nodes. You can connect to and manage the cluster by using kubeconfig files over the Internet.
- If you clear this check box, no EIP is created. You can connect to and manage the cluster by using kubeconfig files only from within the VPC.
RDS WhitelistConfigure the whitelist of the ApsaraDB RDS instance. Add the IP addresses of nodes in the cluster to a whitelist of the ApsaraDB RDS instance.Note To enable an ApsaraDB RDS instance to access the cluster, you must make sure that the instance is deployed in the VPC where the cluster is deployed.
By default, RDS whitelist is not configured.
Security GroupYou can select Create Basic Security Group, Create Advanced Security Group, or Select Existing Security Group. For more information about security groups, see Overview.Note
- To select Select Existing Security Group, Submit a ticket.
- If you select an existing security group, the system does not automatically configure the rules of the security group. This may cause errors when you access the nodes in the cluster. You must manually configure the security group rules. For more information, see Configure security group rules to enforce access control on ACK clusters.
By default, Create Advanced Security Group is selected. The default setting is used in this example.
Show Advanced Options
The advanced settings of the cluster are not configured in this example. For more information about the advanced settings of an ACK cluster, see Configure advanced settings for a cluster.
- Click Next:Node Pool Configurations to configure the node pool.
Specify whether to use existing Elastic Compute Service (ECS) instances or create ECS instances. By default, Create Instance is selected.
Node Pool NameThe name of the node pool.Note The name must be 1 to 63 characters in length, and can contain digits, letters, and hyphens (-). Billing Method
By default, Pay-As-You-Go is selected. The pay-as-you-go and subscription billing methods are supported.
You can select multiple instance types. For more information, see Instance family.
The selected instance types are displayed.
Specify the number of worker nodes (ECS instances) to be created.
System Disk By default, Ultra Disk is selected. The default storage capacity is 120 GiB. Mount Data Disk
By default, this option is not selected.
Enhanced SSDs, standard SSDs, and ultra disks are supported. You can enable disk encryption and disk backup when you mount a data disk. If you enable disk encryption, only the default customer master key (CMK) can be used.
Operating System By default, Alibaba Cloud Linux 2.1903 is selected. Logon Type
- Key pair logon
- Key Pair: Select an SSH key pair from the drop-down list.
- create a key pair: Create an SSH key pair if none is available. For more information about how to create an SSH key pair, see Create an SSH key pair. After the key pair is created, set it as the credential that is used to log on to the cluster.
- Password logon
Note The password must be 8 to 30 characters in length, and must contain at least three of the following character types: uppercase letters, lowercase letters, digits, and special characters. The password cannot contain underscores (_).
- Password: Enter the password that is used to log on to the nodes.
- Confirm Password: Enter the password again.
Advanced settings of worker nodes
The advanced settings of worker nodes are not configured in this example. For more information about the advanced settings of an ACK cluster, see Configure advanced settings for a cluster.
- Key pair logon
- Click Next:Component Configurations to configure components on the Component Configurations wizard page.
Parameter Description Ingress
By default, Install Ingress Controllers is selected. Select Public Network for SLB Network Type.
By default, CSI is selected. For more information about the Flexvolume and CSI plug-ins, see CSI overview.
Specify whether to install the CloudMonitor agent. By default, Install CloudMonitor Agent on ECS Instance and Enable Prometheus Monitoring are selected. After the CloudMonitor agent is installed on ECS nodes, you can view monitoring data about the nodes in the CloudMonitor console.
The CloudMonitor agent is not installed in this example.
Specify whether to enable Log Service. You can select an existing Log Service project or create one. By default, Enable Log Service is selected. When you create an application, you can enable Log Service with a few steps. For more information, see Collect log data from containers by using Log Service.
By default, Install node-problem-detector and Create Event Center is selected. You can specify whether to enable the Kubernetes event center in the Log Service console. For more information, see Create and use a Kubernetes event center.
Log Service is enabled in this example.
Log Collection for Control Plane Components
If you select Enable, the logs of control plane components are collected to the specified Log Service project that belongs to the current account. For more information, see Collect the logs of control plane components in a managed Kubernetes cluster.
- Click Next:Confirm Order.
- Read Terms of Service, select the check box, and then click Create Cluster. Note It requires about 10 minutes to create an ACK cluster with multiple nodes.
- Set the parameters on the Cluster Configurations wizard page.