Kubernetes自动化运维平台--Rancher(离线安装)

Rancher安装

官网：架构推荐 | Rancher。 服务器最低配置要求：4核4G 

安装 Docker-CE

1：查看操作系统

cat /etc/redhat-release 

2：关闭防火墙及Seliunx、swap分区

swapoff -a && sysctl -w vm.swappiness=0 && sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab

systemctl disable --now firewalld && setenforce 0

sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux

sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config

3：更换yum源

sed -e 's|^mirrorlist=|#mirrorlist=|g' \
    -e 's|^#baseurl=http://dl.rockylinux.org/$contentdir|baseurl=https://mirrors.aliyun.com/rockylinux|g' \
    -i.bak \
    /etc/yum.repos.d/rocky*.repo

4: 安装docker源

yum install -y yum-utils jq psmisc net-tools telnet device-mapper-persistent-data lvm2 -y

yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

dnf makecache

5：安装基础工具

yum install wget jq psmisc vim net-tools telnet yum-utils device-mapper-persistent-data lvm2 git iptables -y

6：内核调优

modprobe overlay
modprobe br_netfilter
modprobe iptable_filter
modprobe ip_tables
modprobe iptable_nat 

这一整套是搭建 containerd + K8s 节点前的前置环境初始化

vim /etc/modules-load.d/container-modules.conf

overlay
br_netfilter
iptable_filter
ip_tables
iptable_nat

systemctl enable --now systemd-modules-load.service rsyslog

lsmod | grep -E "overlay|br_netfilter|iptable_filter|ip_tables"

底层存储就绪：加载 overlay，支持容器镜像分层读写

底层网络就绪：加载网桥、iptables 模块，支撑 K8s Pod 通信、Service 转发、网络策略

持久化生效：配置开机自动加载，重启机器不用重复手动加载模块

事后校验：确认模块加载成功，避免后续安装 containerd/kubelet 报网络 / 存储底层错误

cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF

sysctl --system

sysctl -p

7: 安装docker

 yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y

配置镜像加速器  

vim /etc/docker/daemon.json

{
 "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors": [ "http://hub-mirror.c.163.com",
  "https://docker.m.daocloud.io",
  "https://dockerproxy.com",
  "https://vu1ajswo.mirror.aliyuncs.com",
  "https://docker.mirrors.ustc.edu.cn",
  "https://docker.nju.edu.cn" ]
}

8:启动Docker

systemctl daemon-reload && systemctl enable --now docker

测试docker

docker info

---

离线安装 Rancher

版本选择：GitHub - rancher/rancher: Complete container management platform

k3s 容器镜像修改方法：https://docs.rancher.cn/docs/rancher2/best-practices/use-in-china/_index/

先创建目录 --  存放我的个人主页中的rancher10个镜像 (提前下载好)

mkdir -p /data/rancher-data  && chmod  777  -R   /data  &&  cd  /data/rancher-data

通过xshell放到当前目录下! 

1:创建数据目录

cd  /opt &&  mkdir   rancher && cd  rancher

2:启动Rancher :  (拉取走的是阿里云)

vim   docker-compose.yaml

services:
  rancher:
    image: registry.cn-hangzhou.aliyuncs.com/hujiaming/rancher:v2.14.2
    container_name: rancher
    restart: unless-stopped
    privileged: true
    networks:
      - rancher-net
    ports:
      - "80:80"
      - "443:443"
    dns:
      - 223.5.5.5
      - 114.114.114.114
    volumes:
      - /data/rancher-data:/var/lib/rancher
    environment:
      - TZ=Asia/Shanghai
      - CATTLE_BOOTSTRAP_PASSWORD=Mashangyouqian666666!@
      - CATTLE_TELEMETRY=off
      - CATTLE_AGENT_IMAGE=registry.cn-hangzhou.aliyuncs.com/hujiaming/rancher-agent:v2.14.2
    ulimits:
      nofile:
        soft: 65536
        hard: 65536
      nproc: 65536
    healthcheck:
      test: ["CMD", "curl", "-f", "-k", "https://localhost/ping"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 90s
    logging:
      driver: json-file
      options:
        max-size: "100m"
        max-file: "5"
networks:
  rancher-net:
    driver: bridge
    ipam:
      config:
        - subnet: 172.20.0.0/16
          gateway: 172.20.0.1

docker  compose   up  -d 

3:查看容器日志

docker logs -f rancher  

tail  -f  /data/rancher-data/k3s.log

如果rancher的组件镜像无法拉取，请参考此链接如何在国内使用 Rancher | Rancher文档

新开终端!

进入到rancher容器

docker  exec  -it  rancher  bash

cd   /var/lib/rancher

加载我们放在目录里面的镜像文件

ctr -n k8s.io image import /var/lib/rancher/mirrored-coredns-coredns-1.14.2.tar 
ctr -n k8s.io image import /var/lib/rancher/mirrored-pause-3.6.tar 
ctr -n k8s.io image import /var/lib/rancher/shell-v0.7.0.tar 
ctr -n k8s.io image import /var/lib/rancher/fleet-v0.15.2.tar 
ctr -n k8s.io image import /var/lib/rancher/turtles-v0.26.2.tar 
ctr -n k8s.io image import /var/lib/rancher/system-upgrade-controller-v0.19.1.tar 
ctr -n k8s.io image import /var/lib/rancher/rancher-webhook-v0.10.6.tar           
ctr -n k8s.io image import /var/lib/rancher/remotedialer-proxy-v0.7.3.tar 
ctr -n k8s.io image import /var/lib/rancher/fleet-agent-v0.15.2.tar 
ctr -n k8s.io image import /var/lib/rancher/cluster-api-controller-v1.12.7.tar

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更换镜像

registry.cn-hangzhou.aliyuncs.com