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If the cluster forwarding mode is iptables, run the iptables -t nat -L command to view the port. If the cluster forwarding mode is IPVS, run the ipvsadm -Ln command to view the port.
In containers, enabling this parameter can prevent the bandwidth of TCP connections that have been translated using NAT from being limited.
High performance requirements: Cloud Native Network 2.0 uses VPC networks to construct container networks, eliminating the need for tunnel encapsulation or NAT when containers communicate.
versions later than Kubernetes 1.25, Kubelet uses IPTablesCleanup to migrate the Kubernetes-generated iptables chains used by the components outside of Kubernetes in phases so that iptables chains such as KUBE-MARK-DROP, KUBE-MARK-MASQ, and KUBE-POSTROUTING will not be created in the NAT
versions later than Kubernetes 1.25, Kubelet uses IPTablesCleanup to migrate the Kubernetes-generated iptables chains used by the components outside of Kubernetes in phases so that iptables chains such as KUBE-MARK-DROP, KUBE-MARK-MASQ, and KUBE-POSTROUTING will not be created in the NAT
Because container tunnel encapsulation and NAT are not required, Cloud Native Network 2.0 enables higher network performance than the container tunnel network model and VPC network model.
If a pod tries to access a private CIDR block, the source node will not perform NAT on the pod IP address.
For details, see NAT Gateway Price Calculator. Install kubectl on an existing ECS and access a cluster using kubectl. For details, see Accessing a Cluster Using kubectl.
Changing the value of the kernel parameter net.ipv4.tcp_tw_recycle to 1 The NAT service becomes abnormal. Change the value to 0. Changing the value of the kernel parameter net.ipv4.tcp_tw_reuse to 1 The network becomes abnormal. Change the value to 0.
For details, see NAT Gateway Price Calculator. In the use case described in this section, a NodePort Service is required to access the Kubeflow web UI. Ensure an EIP is bound to any node in the cluster. The EIP will be billed. For details, see Elastic IP Price Calculator.
CCE can work with NAT Gateway. Certain bugs are fixed. 2018-05-06 Changes: Namespace deletion. Users can specify an ELB port for health checks. Certain bugs are fixed. 2018-04-04 Changes: Cluster nodes support CentOS 7.1.
