1 系统基础配置

  1. ​安全设置

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    # 关闭防火墙和SELinux
    systemctl disable --now firewalld
    setenforce 0
    sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

  2. ​禁用Swap

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    swapoff -a
    sed -i '/swap/s/^/#/' /etc/fstab

  3. ​网络配置

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# 主机名设置（示例）
hostnamectl set-hostname k8s-master1
ssh x.x.x.11 hostnamectl set-hostname k8s-master1;\
ssh x.x.x.12 hostnamectl set-hostname k8s-master2;\
ssh x.x.x.13 hostnamectl set-hostname k8s-master3;\
ssh x.x.x.14 hostnamectl set-hostname k8s-node1;\
ssh x.x.x.15 hostnamectl set-hostname k8s-node2;\
ssh x.x.x.16 hostnamectl set-hostname k8s-node3;
# 主机名解析
cat >> /etc/hosts <<EOF
x.x.x.11  k8s-master1
x.x.x.12  k8s-master2
x.x.x.13  k8s-master3
x.x.x.14  k8s-node1
x.x.x.15  k8s-node2
x.x.x.16  k8s-node3
EOF

1.1 环境优化

  1. ​时间同步

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    yum install -y chrony
    systemctl enable --now chronyd
    chronyc sources -v

  2. ​DNS配置

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    echo "nameserver X.X.X.5" > /etc/resolv.conf