Professional edge Kubernetes clusters offer higher reliability, stability, security, and schedulability than standard edge Kubernetes clusters in large-scale production environments for enterprise users. In addition, professional edge Kubernetes clusters are covered by the service level agreement (SLA) that supports compensation clauses. This topic describes how to create a professional edge Kubernetes cluster in the Container Service for Kubernetes (ACK) console.

Prerequisites

Resource Access Management (RAM) is activated in the RAM console. Auto Scaling (ESS) is activated in the ESS console.

Note

When you create a cluster of Container Service for Kubernetes (ACK), note the following limits:

  • SLB instances that are created together with the ACK cluster support only the pay-as-you-go billing method.
  • ACK clusters support only Virtual Private Cloud (VPC) networks.
  • By default, each account has specific quotas on cloud resources that can be created. You cannot create clusters if the quota is reached. Make sure that you have sufficient resources before you create a cluster.
    • For more information about the maximum numbers of clusters and nodes that can be created with each account, see Limits.
      Notice By default, you can add up to 48 route entries to each VPC network in an ACK cluster. This means that you can deploy up to 48 nodes in an ACK cluster that uses Flannel. An ACK cluster that uses Terway is not subject to this limit. To increase the quota of route entries for a VPC network, submit a ticket.
    • You can create up to 100 security groups under each account.
    • You can create up to 60 pay-as-you-go SLB instances under each account.
    • You can create up to 20 elastic IP addresses (EIPs) under each account.

Procedure

  1. Log on to the ACK console.
  2. In the left-side navigation pane, click Clusters.
  3. In the upper-right corner of the Clusters page, click Create Kubernetes Cluster.
  4. On the Managed Edge Kubernetes tab, configure the professional edge Kubernetes cluster.
    1. Configure basic settings of the cluster.
      Parameter Description
      Cluster Name
      Enter a name for the ACK 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 Professional to create a professional edge Kubernetes cluster.

      Region

      Select a region to deploy the cluster.

      Resource Group
      Move the pointer over All Resources at the top of the page and select the resource group to which the cluster belongs. The name of the selected resource group is displayed, as shown in the following figure. Resource Group
      Kubernetes Version

      The Kubernetes versions that are supported by professional edge Kubernetes clusters are displayed.

      VPC
      Select a virtual private cloud (VPC) to deploy the cluster. Standard VPCs and shared VPCs are supported.
      • 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 vSwitches in the VPC with other accounts.
      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 Work with VPCs.
      VSwitch

      Select vSwitches.

      You can select up to three 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.

      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 subnetting for ACK clusters, see Plan CIDR blocks for an ACK cluster.

      Service CIDR

      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 subnetting for ACK clusters, see Plan CIDR blocks for an ACK cluster.

      IP Addresses per Node
      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 block. Based on these configurations, 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.
      Configure SNAT

      By default, an ACK cluster cannot access the Internet. If the VPC that you select for the ACK cluster cannot access the Internet, you can select Configure SNAT for VPC. This way, ACK will create a NAT gateway and configure Source Network Address Translation (SNAT) entries to enable Internet access for the VPC.

      Access to API Server
      By default, an internal-facing Server Load Balancer (SLB) instance is created for the cluster API server. You can modify the specifications of the SLB instance. For more information, see Instance types and specifications.
      Notice If you delete the SLB instance, you cannot access the API server.
      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 Internet-facing SLB instance. Port 6443 used by the API server is opened on master nodes. You can connect to and manage the ACK cluster by using kubeconfig over the Internet.
      • If you clear this check box, no EIP is created. You can connect to and manage the ACK cluster only by using kubeconfig from within the VPC.
      Note Edge nodes interact with the API server in the cloud over the Internet. If you clear Expose API Server with EIP, the edge nodes cannot be connected to clusters in the cloud. As a result, the created cluster cannot be used in edge computing scenarios.
      RDS Whitelist
      Set the Relational Database Service (RDS) whitelist. Add the IP addresses of the nodes in the cluster to the RDS whitelist.
      Note To enable an RDS instance to access the cluster, you must deploy the RDS instance in the VPC where the cluster is deployed.
      Security Group

      You can select Create Basic Security Group, Create Advanced Security Group, or Select Existing Security Group. For more information, see Overview.

      Secret Encryption If you select Select Key, you can use a key that is created in the Key Management Service (KMS) console to encrypt Secrets for the professional edge Kubernetes cluster. For more information, see Use KMS to encrypt Kubernetes Secrets.
    2. Configure advanced settings of the cluster.
      Parameter Description
      Kube-proxy Mode
      iptables and IPVS are supported.
      • iptables is a mature and stable kube-proxy mode. It uses iptables rules to conduct service discovery and load balancing. The performance of this mode is restricted by the size of the ACK cluster. This mode is suitable for ACK clusters that manage a small number of Services.
      • IPVS is a high-performance kube-proxy mode. It uses Linux Virtual Server (LVS) to conduct service discovery and load balancing. This mode is suitable for ACK clusters that manage a large number of Services. We recommend that you use this mode in scenarios where high-performance load balancing is required.
      Labels
      Add labels to the nodes in the cluster. Enter a key and a value, and click Add.
      Note
      • Key is required. Value is optional.
      • Keys are not case-sensitive. A key must be 1 to 64 characters in length, and cannot start with aliyun, http://, or https://.
      • Values are not case-sensitive. A value can be empty and can contain up to 128 characters in length. It cannot be http:// or https://.
      • The keys of labels that are added to the same resource must be unique. If you add a label with a used key, the label overwrites the one that uses the same key.
      • You can add up to 20 labels to each resource. If you add more than 20 labels to a resource, all labels become invalid. You must remove excess labels for the remaining labels to take effect.
      Deletion Protection

      Specify whether to enable deletion protection. If you select this check box, the ACK cluster cannot be deleted in the console or by calling the API. This prevents user errors.

  5. Click Next:Worker Configurations to configure worker nodes.
    Note In a professional edge Kubernetes cluster, you must configure at least one worker node to deploy controllers.
    Parameter Description
    Instance Type

    You can select multiple instance types. For more information, see Instance families.

    Note To use advanced features such as logging, monitoring, and reverse tunneling, you must deploy the related components in the cloud. Therefore, you must create at least one Elastic Compute Service (ECS) instance as a worker node.
    Selected Types

    The selected instance types are displayed.

    Quantity

    Specify the number of worker nodes (ECS instances) to be created.

    System Disk
    Enhanced SSDs, SSDs, and ultra disks are supported.
    Note
    • You can select Enable Backup to back up disk data.
    • If you select an enhanced SSD as the system disk, you can also set a custom performance level for the disk.

      You can select higher performance levels for enhanced SSDs with larger storage capacities. For example, you can select performance level 2 for an enhanced SSD with a storage capacity of more than 460 GiB. You can select performance level 3 for an enhanced SSD with a storage capacity of more than 1,260 GiB. For more information, see Capacity and PLs.

    Mount Data Disk

    Enhanced SSDs, SSDs, and ultra disks are supported. You can enable disk encryption and disk backup when you mount a data disk.

    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.
      • Password: Enter the password that is used to log on to the nodes.
      • Confirm Password: Enter the password again.
    Note You must set the logon type if you select Install the CloudMonitor Agent on ECS Nodes or Enable Log Service.
  6. Click Next:Component Configurations to configure components.
    Parameter Description
    CloudMonitor Agent

    Select whether to install the CloudMonitor agent. If you select Install the CloudMonitor Agent on ECS Nodes, you can view monitoring data about the nodes in the CloudMonitor console.

    Log Service

    Specify whether to enable Log Service. You can select an existing Log Service project or create a new one. By default, Enable Log Service is selected. When you create an application, you can activate Log Service through a few steps. For more information, see Use Log Service to collect container logs.

    You can also select or clear Collect Logs of Control Plane Components. If you select this check box, logs of control plane components are collected to the specified Log Service project within your account. For more information, see Collect the logs of control plane components in a managed Kubernetes cluster.
    Note By default, Collect Logs of Control Plane Components is selected for a professional edge Kubernetes cluster.
  7. Click Next:Confirm Order.
  8. Read Terms of Service, select the check box, and then click Create Cluster.
    Note It takes about 10 minutes to create a professional edge Kubernetes cluster that contains multiple nodes.

Result

  • After the cluster is created, you can view the newly created cluster on the Clusters page in the ACK console.
  • Click View Logs in the Actions column. On the Log Information page, you can view the log data of the cluster. To view detailed log information, click Stack events.

  • Click Details in the Actions column. On the details page of the cluster, click the Basic Information tab to view basic information about the cluster. You can also click the Connection Information tab to view information about how to connect to the cluster. The following information is displayed:
    • API Server Public Endpoint: the IP address and port that the API server uses to provide services over the Internet. It allows you to manage the cluster by using kubectl or other tools on your clients.
    • API Server Internal Endpoint: the IP address and port that the API server uses to provide services within the cluster. The IP address belongs to the Server Load Balancer (SLB) instance that is bound to the cluster.
    • Testing Domain: the domain name that is used to test Services. The suffix of the domain name is <cluster_id>.<region_id>.alicontainer.com.
      Note On the Basic Information tab, you can click Rebind Domain Name on the right side of Testing Domain to rebind the domain name.