k8s实践

配置阿里云yum源、配置docker仓库、配置K8S的yum源
vi /etc/yum.repos.d/kubernetes.repo


[kubernetes]
 
name=Kubernetes
 
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
 
enabled=1
 
gpgcheck=1
 
repo_gpgcheck=1
 
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
 
        http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum makecache

安装k8s的组件

yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes

启动kubelet并设置kubelet开机自启

systemctl enable kubelet&& systemctl start kubelet
kubeadm config images list

k8s实践_第1张图片
1、创建/etc/sysctl.d/k8s.conf文件,添加如下内容:

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

执行下命令使修改生效。

modprobe br_netfilter
sysctl -p /etc/sysctl.d/k8s.conf

并重启docker生效

systemctl daemon-reload
 
systemctl restart docker.service

k8s-docker.sh
如下

echo ""
echo "=========================================================="
echo "Pull Kubernetes v1.18.0 Images from aliyuncs.com ......"
echo "=========================================================="
echo ""
 
MY_REGISTRY=registry.cn-hangzhou.aliyuncs.com/openthings
 
# 基本组件
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.18.0
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.18.0
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.18.0
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.18.0
docker pull ${MY_REGISTRY}/k8s-gcr-io-etcd:3.4.3-0
docker pull ${MY_REGISTRY}/k8s-gcr-io-pause:3.2
docker pull ${MY_REGISTRY}/k8s-gcr-io-coredns:1.6.7
 
# 修改tag
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.18.0 k8s.gcr.io/kube-apiserver:v1.18.0
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.18.0 k8s.gcr.io/kube-scheduler:v1.18.0
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.18.0 k8s.gcr.io/kube-controller-manager:v1.18.0
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.18.0 k8s.gcr.io/kube-proxy:v1.18.0
docker tag ${MY_REGISTRY}/k8s-gcr-io-etcd:3.4.3-0 k8s.gcr.io/etcd:3.4.3-0
docker tag ${MY_REGISTRY}/k8s-gcr-io-pause:3.2 k8s.gcr.io/pause:3.2
docker tag ${MY_REGISTRY}/k8s-gcr-io-coredns1.6.7 k8s.gcr.io/coredns:1.6.7
 
## 删除镜像
docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.18.0
docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.18.0
docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.18.0
docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.18.0
docker rmi ${MY_REGISTRY}/k8s-gcr-io-etcd:3.4.3-0
docker rmi ${MY_REGISTRY}/k8s-gcr-io-pause:3.2
docker rmi ${MY_REGISTRY}/k8s-gcr-io-coredns:1.6.7
 
echo ""
echo "=========================================================="
echo "Pull Kubernetes v1.18.0 Images FINISHED."
echo "           by https://blog.csdn.net/yulong_1988"
echo "=========================================================="
 
echo ""

初始化呢

kubeadm init --kubernetes-version=1.18.0 --pod-network-cidr=192.168.0.0/16 --apiserver-advertise-address=192.168.0.7

出错了
k8s实践_第2张图片

vim /etc/docker/daemon.json
{
“exec-opts”: [“native.cgroupdriver=systemd”],
“registry-mirrors”: [“https://xxxxx.mirror.aliyuncs.com”]
并重启docker生效

systemctl daemon-reload

systemctl restart docker.service

k8s实践_第3张图片

swapoff -a #临时关闭
vim /etc/fstab #注释掉swap即可永久关闭

k8s实践_第4张图片
成功

k8s实践_第5张图片

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