Shulou(Shulou.com)06/02 Report--

Kubeadm is a tool provided by Kubernetes to quickly install Kubernetes clusters. With the release of each version of Kubernetes, kubeadm will adjust some practices on cluster configuration. You can learn some new best practices on cluster configuration by experimenting with kubeadm.

1. Prepare 1.1system configuration [root@k8s-master ~] # cat / etc/hosts127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain6192.168.0.246 k8s-master192.168.0.247 k8s-node1192.168.0.248 k8s-node2

If each host has a firewall enabled and you need to open the ports required by each component of the Kubernetes, you can see the "Check required ports" section in Installing kubeadm. For simplicity here, disable the firewall on each node:

Systemctl stop firewalldsystemctl disable firewalld

Disable SELINUX:

Setenforce 0

Vi / etc/selinux/configSELINUX=disabled

Create the / etc/sysctl.d/k8s.conf file and add the following:

Net.bridge.bridge-nf-call-ip6tables = 1net.bridge.bridge-nf-call-iptables = 1net.ipv4.ip_forward = 1

Execute the order to make the changes take effect.

Modprobe br_netfilter

Sysctl-p / etc/sysctl.d/k8s.conf

Prerequisites for 1.2kube-proxy to enable ipvs

Since ipvs has been added to the backbone of the kernel, the following kernel modules need to be loaded to enable ipvs for kube-proxy:

Ip_vsip_vs_rrip_vs_wrrip_vs_shnf_conntrack_ipv4

Execute the following script on all Kubernetes nodes node1 and node2:

Cat > / etc/sysconfig/modules/ipvs.modules

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