k8s脚本安装kubeadm集群

#------------------------------ master节点脚本 ----------------------------
#!/bin/bash

#环境准备
systemctl stop firewalld
systemctl disable firewalld
setenforce 0
iptables -F
swapoff -a



#检查到错误退出脚本

error() {

if [ $? -ne 0 ];then
echo -e "\033[31m 检查到此处有错误，已退出脚本！ \033[0m"
exit 0
fi

}

#加载 ip_vs 模块
for i in $(ls /usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs|grep -o "^[^.]*");do echo $i; /sbin/modinfo -F filename $i >/dev/null 2>&1 && /sbin/modprobe $i;done >& /dev/null

#修改主机名
read -p "请设置你的主机名：" name
hostnamectl set-hostname $name

#在此处添加hosts文件

cat /etc/hosts | grep master

if [ $? -ne ];then

cat  >> /etc/hosts << EOF
#此处写入设置hosts文件
#如192.168.x.x  test

EOF

else

continue

fi

#调整内核参数
cat > /etc/sysctl.d/kubernetes.conf << EOF
net.bridge.bridge-nf-call-ip6tables=1
net.bridge.bridge-nf-call-iptables=1
net.ipv6.conf.all.disable_ipv6=1
net.ipv4.ip_forward=1
EOF

#生效参数
sysctl --system 

#-------------------- 所有节点安装docker --------------------

#设置镜像仓库

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



#生成缓存

yum makecache fast

yum install -y yum-utils device-mapper-persistent-data lvm2
yum install -y docker-ce

mkdir /etc/docker
cat > /etc/docker/daemon.json <<EOF
{
  "registry-mirrors": ["https://6ijb8ubo.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  }
}
EOF


#重载/重启docker
systemctl daemon-reload

systemctl restart docker.service

systemctl enable docker.service

error

#-------------------- 所有节点安装kubeadm，kubelet和kubectl ----------------
#定义kubernetes源
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

yum install -y kubelet-1.15.1 kubeadm-1.15.1 kubectl-1.15.1

#开机自启kubelet
systemctl enable kubelet.service

error

#-------------------- 部署K8S集群 -------------------- 

#查看初始化需要的镜像
kubeadm config images list

#在 master 节点上传 kubeadm-basic.images.tar.gz 压缩包至 /opt 目录

cd /opt/
tar zxvf kubeadm-basic.images.tar.gz

for i in $(ls /opt/kubeadm-basic.images/*.tar); do docker load -i $i; done >& /dev/null

#复制镜像和脚本到 node 节点，并在 node 节点上执行脚本 bash /opt/load-images.sh

echo -e "\033[31m 复制镜像和脚本到 node01节点！: \033[0m"
scp -r kubeadm-basic.images [email protected]${node01的ip}:/opt

echo -e "\033[31m 复制镜像和脚本到 node02节点！: \033[0m"
scp -r kubeadm-basic.images [email protected]${node02的ip}:/opt

#初始化kubeadm
kubeadm config print init-defaults > /opt/kubeadm-config.yaml

#修改kubeadm-config.yaml文件

ip=`ip a | grep ens33 | awk 'NR==2' | awk -F " " '{print$2}' | awk -F "/" '{print$1}'`
sed -i "12c   advertiseAddress: $ip" /opt/kubeadm-config.yaml
sed -i "12s/^/  /" /opt/kubeadm-config.yaml
sed -i "34c kubernetesVersion: v1.15.1" /opt/kubeadm-config.yaml
sed -i "37c podSubnet: \"10.244.0.0/16\"" /opt/kubeadm-config.yaml
sed -i "38i serviceSubnet: 10.96.0.0/12" /opt/kubeadm-config.yaml

echo 'apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
featureGates:
  SupportIPVSProxyMode: true
mode: ipvs' >> /opt/kubeadm-config.yaml

#设定kubectl
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config


#所有节点上传flannel镜像 flannel.tar 到 /opt 目录，master节点上传 kube-flannel.yml 文件

cd /opt/
docker load < flannel.tar

#在 master 节点创建 flannel 资源
kubectl apply -f kube-flannel.yml

#加入集群（master节点），阿里源在线获取
kubeadm init --image-repository=registry.aliyuncs.com/google_containers --pod-network-cidr=10.244.0.0/16 --kubernetes-version=v1.15.12

echo -e "\033[31m k8s安装完成，请在node节点输入master生成的指令加入集群命令！ \033[0m"

#----------------------------node 节点脚本----------------------------

#!/bin/bash
#环境准备
systemctl stop firewalld
systemctl disable firewalld
setenforce 0
iptables -F
swapoff -a

#检查到错误退出脚本

error() {
if [ $? -ne 0 ];then
echo -e "\033[31m 检查到此处有错误，已退出脚本！ \033[0m"
exit 0
fi

}

#加载 ip_vs 模块
for i in $(ls /usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs|grep -o "^[^.]*");do echo $i; /sbin/modinfo -F filename $i >/dev/null 2>&1 && /sbin/modprobe $i;done >& /dev/null

#修改主机名
read -p "请设置你的主机名：" name
hostnamectl set-hostname $name

#在此处添加hosts文件
cat  >> /etc/hosts << EOF
#写入hosts文件
EOF

#调整内核参数
cat > /etc/sysctl.d/kubernetes.conf << EOF
net.bridge.bridge-nf-call-ip6tables=1
net.bridge.bridge-nf-call-iptables=1
net.ipv6.conf.all.disable_ipv6=1
net.ipv4.ip_forward=1
EOF

#生效参数
sysctl --system 

#-------------------- 所有节点安装docker --------------------

#设置镜像仓库

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

yum install -y yum-utils device-mapper-persistent-data lvm2
yum install -y docker-ce

mkdir /etc/docker
cat > /etc/docker/daemon.json <<EOF
{
  "registry-mirrors": ["https://6ijb8ubo.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  }
}
EOF

#重载/重启docker
systemctl daemon-reload
systemctl restart docker.service
systemctl enable docker.service

error

#-------------------- 所有节点安装kubeadm，kubelet和kubectl ----------------
#定义kubernetes源
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

yum install -y kubelet-1.15.1 kubeadm-1.15.1 kubectl-1.15.1

#开机自启kubelet
systemctl enable kubelet.service

error

#-------------------- 部署K8S集群 -------------------- 

#初始化kubeadm
kubeadm config print init-defaults > /opt/kubeadm-config.yaml

#修改kubeadm-config.yaml文件

ip=`ip a | grep ens33 | awk 'NR==2' | awk -F " " '{print$2}' | awk -F "/" '{print$1}'`
sed -i "12c   advertiseAddress: $ip" /opt/kubeadm-config.yaml
sed -i "12s/^/  /" /opt/kubeadm-config.yaml
sed -i "34c kubernetesVersion: v1.15.1" /opt/kubeadm-config.yaml
sed -i "37c podSubnet: \"10.244.0.0/16\"" /opt/kubeadm-config.yaml
sed -i "38i serviceSubnet: 10.96.0.0/12" /opt/kubeadm-config.yaml

echo 'apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
featureGates:
  SupportIPVSProxyMode: true
mode: ipvs' >> /opt/kubeadm-config.yaml

#设定kubectl
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config

#所有节点上传flannel镜像 flannel.tar 到 /opt 目录，master节点上传 kube-flannel.yml 文件
cd /opt/
docker load < flannel.tar

echo -e "\033[31m k8s安装完成，请输入master生成的加入集群命令！ \033[0m"