• 第一步

 

#!/bin/bash

if [ $UID -ne 0 ]; then
  echo "本脚本需要使用root用户执行" 
  exit 0
fi

echo "-----------------升级kernel-----------------------"
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
#yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
yum --enablerepo=elrepo-kernel install kernel-lt -y
rpm -qa | grep  kernel.*-3 | awk '{print "yum remove -y "$1}' | sh -x
awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg
sed -i "s/GRUB_DEFAULT=.*/GRUB_DEFAULT=0/g" /etc/default/grub
sed -i "s/GRUB_TIMEOUT=5/GRUB_TIMEOUT=0/g" /etc/default/grub

grep numa=off /etc/default/grub 
if [ $? -ne 0 ]; then  
  grep -n GRUB_CMDLINE_LINUX=\".*\" /etc/default/grub | awk -F '[:\"]' '{print "sed -i \""$1"c GRUB_CMDLINE_LINUX=\\\""$3" numa=off\\\"\" /etc/default/grub"}' | sh -x
fi

grub2-mkconfig -o /boot/grub2/grub.cfg
echo "正在重启。。。"
reboot

#第一次运作脚本时正在运行的内核无法删除
#重启后新内核应该已经再运行了
#可手动删除旧内核,也可以再执行一次脚本即可删除旧内核
 

 

  • 第二部
  • #!/bin/bash

    if [ $UID -ne 0 ]; then
      echo "本脚本需要使用root用户执行" 
      exit 0
    fi

    #yum源
    curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
    rm -rf /var/cache/yum && yum makecache && yum -y update && yum -y autoremove

    #时间
    timedatectl set-timezone Asia/Shanghai
    timedatectl set-local-rtc 0
    yum install -y ntpdate
    ntpdate -u ntp.api.bz
    systemctl restart rsyslog
    systemctl restart crond

    #防火墙和iptables
    systemctl stop firewalld 
    systemctl disable firewalld
    iptables -F && iptables -X && iptables -F -t nat && iptables -X -t nat && iptables -P FORWARD ACCEPT

    #selinux关闭
    setenforce 0
    sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config

    #swap关闭
    swapoff -a
    sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

    #ipvs开启
    cat > /etc/sysconfig/modules/ipvs.modules <<EOF
    #!/bin/bash
    modprobe -- ip_vs
    modprobe -- ip_vs_rr
    modprobe -- ip_vs_wrr
    modprobe -- ip_vs_sh
    modprobe -- nf_conntrack
    modprobe -- br_netfilter
    EOF
    chmod 755 /etc/sysconfig/modules/ipvs.modules 
    bash /etc/sysconfig/modules/ipvs.modules

    #内核参数设置
    cat << EOF | tee /etc/sysctl.d/k8s.conf
    net.bridge.bridge-nf-call-iptables=1
    net.bridge.bridge-nf-call-ip6tables=1
    net.ipv4.ip_forward=1
    net.ipv4.tcp_tw_recycle=0
    vm.swappiness=0
    vm.overcommit_memory=1
    vm.panic_on_oom=0
    fs.inotify.max_user_instances=8192
    fs.inotify.max_user_watches=1048576
    fs.file-max=52706963
    fs.nr_open=52706963
    net.ipv6.conf.all.disable_ipv6=1
    net.netfilter.nf_conntrack_max=2310720
    EOF
    sysctl -p /etc/sysctl.d/k8s.conf

    #日志设置
    mkdir /var/log/journal
    mkdir /etc/systemd/journald.conf.d
    cat > /etc/systemd/journald.conf.d/99-prophet.conf <<EOF
    [Journal]
    # 持久化保存到磁盘
    Storage=persistent   

    # 压缩历史日志
    Compress=yes    
    SyncIntervalSec=5m
    RateLimitInterval=30s
    RateLimitBurst=1000    

    # 最大占用空间 10G
    SystemMaxUse=10G     

    # 单日志文件最大 200M
    SystemMaxFileSize=200M    

    # 日志保存时间 2 周
    MaxRetentionSec=2week    

    # 不将日志转发到 syslog
    ForwardToSyslog=no
    EOF
    systemctl restart systemd-journald

    #停止无关服务
    systemctl stop postfix 
    systemctl disable postfix


    yum install -y epel-release
    yum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstat libseccomp wget lsof telnet vim net-tools

    #安装docker,设置docker
    yum install -y yum-utils device-mapper-persistent-data lvm2
    yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
    yum makecache fast
    yum install -y docker-ce
    useradd -m docker
    systemctl start docker 
    systemctl enable docker
    sed -i "13i ExecStartPost=/usr/sbin/iptables -P FORWARD ACCEPT" /usr/lib/systemd/system/docker.service
    mkdir -p /etc/docker
    tee /etc/docker/daemon.json <<-'EOF'
    {
      "registry-mirrors": ["https://n8m3bosn.mirror.aliyuncs.com"],
      "exec-opts": ["native.cgroupdriver=systemd"],
      "log-driver": "json-file",
      "log-opts": {
        "max-size": "100m"
      },
      "storage-driver": "overlay2",
      "storage-opts": [
        "overlay2.override_kernel_check=true"
      ]
    }
    EOF
    systemctl daemon-reload
    systemctl restart docker

    #安装kubenetes
    cat <<EOF > /etc/yum.repos.d/kubernetes.repo
    [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 makecache fast
    yum install -y kubelet kubeadm kubectl
    systemctl enable kubelet

    #拉镜像,从aliyun
    kubeadm config images list | sed -e 's/^/docker pull /g' -e 's#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/google_containers#g' | sh -x
    docker images | grep registry.cn-hangzhou.aliyuncs.com/google_containers | awk '{print "docker tag",$1":"$2,$1":"$2}' | sed -e 's/registry.cn-hangzhou.aliyuncs.com\/google_containers/k8s.gcr.io/2' | sh -x
    docker images | grep registry.cn-hangzhou.aliyuncs.com/google_containers | awk '{print "docker rmi """$1""":"""$2}' | sh -x
     

  • 第三部

  • #!/bin/bash

    if [ $UID -ne 0 ]; then
      echo "本脚本需要使用root用户执行" 
      exit 0
    fi

    source ./configrc

    ssh-keygen -t rsa
    for nip in ${!NODE_IPS[@]}
    do
      echo "ssh-copy-id root@${nip}" | sh -x
    done

    for nip in ${NODE_IPS[@]}
    do
      for idx in ${!NODE_HOSTNAMES[@]}
      do
        _name=${NODE_HOSTNAMES[$idx]} 
        _ip=${NODE_IPS[$idx]} 
        ssh root@${nip} "echo '$_ip $_name' >> /etc/hosts"
      done
    done

 

 

 

#!/bin/bash

if [ $UID -ne 0 ]; then
    echo "本脚本需要使用root用户执行" 
    exit 0
fi

source ./configrc

rm -rf kubeadm-init.yaml

cat > kubeadm-init.yaml <<EOF
apiVersion: kubeadm.k8s.io/v1beta2
kind: InitConfiguration
nodeRegistration:
  taints:
  - effect: PreferNoSchedule
    key: node-role.kubernetes.io/master
---
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
kubernetesVersion: v1.15.1
networking:
  serviceSubnet: "10.96.0.0/12"
  podSubnet: 10.244.0.0/16
EOF


cat > kube-flannel.yaml <<EOF
---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
  name: psp.flannel.unprivileged
  annotations:
    seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default
    seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default
    apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default
    apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default
spec:
  privileged: false
  volumes:
    - configMap
    - secret
    - emptyDir
    - hostPath
  allowedHostPaths:
    - pathPrefix: "/etc/cni/net.d"
    - pathPrefix: "/etc/kube-flannel"
    - pathPrefix: "/run/flannel"
  readOnlyRootFilesystem: false
  # Users and groups
  runAsUser:
    rule: RunAsAny
  supplementalGroups:
    rule: RunAsAny
  fsGroup:
    rule: RunAsAny
  # Privilege Escalation
  allowPrivilegeEscalation: false
  defaultAllowPrivilegeEscalation: false
  # Capabilities
  allowedCapabilities: ['NET_ADMIN']
  defaultAddCapabilities: []
  requiredDropCapabilities: []
  # Host namespaces
  hostPID: false
  hostIPC: false
  hostNetwork: true
  hostPorts:
  - min: 0
    max: 65535
  # SELinux
  seLinux:
    # SELinux is unsed in CaaSP
    rule: 'RunAsAny'
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
rules:
  - apiGroups: ['extensions']
    resources: ['podsecuritypolicies']
    verbs: ['use']
    resourceNames: ['psp.flannel.unprivileged']
  - apiGroups:
      - ""
    resources:
      - pods
    verbs:
      - get
  - apiGroups:
      - ""
    resources:
      - nodes
    verbs:
      - list
      - watch
  - apiGroups:
      - ""
    resources:
      - nodes/status
    verbs:
      - patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: flannel
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: flannel
subjects:
- kind: ServiceAccount
  name: flannel
  namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: flannel
  namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
  name: kube-flannel-cfg
  namespace: kube-system
  labels:
    tier: node
    app: flannel
data:
  cni-conf.json: |
    {
      "name": "cbr0",
      "plugins": [
        {
          "type": "flannel",
          "delegate": {
            "hairpinMode": true,
            "isDefaultGateway": true
          }
        },
        {
          "type": "portmap",
          "capabilities": {
            "portMappings": true
          }
        }
      ]
    }
  net-conf.json: |
    {
      "Network": "10.244.0.0/16",
      "Backend": {
        "Type": "vxlan"
      }
    }
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kube-flannel-ds-amd64
  namespace: kube-system
  labels:
    tier: node
    app: flannel
spec:
  selector:
    matchLabels:
      app: flannel
  template:
    metadata:
      labels:
        tier: node
        app: flannel
    spec:
      hostNetwork: true
      nodeSelector:
        beta.kubernetes.io/arch: amd64
      tolerations:
      - operator: Exists
        effect: NoSchedule
      serviceAccountName: flannel
      initContainers:
      - name: install-cni
        image: quay.io/coreos/flannel:v0.11.0-amd64
        command:
        - cp
        args:
        - -f
        - /etc/kube-flannel/cni-conf.json
        - /etc/cni/net.d/10-flannel.conflist
        volumeMounts:
        - name: cni
          mountPath: /etc/cni/net.d
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      containers:
      - name: kube-flannel
        image: quay.io/coreos/flannel:v0.11.0-amd64
        command:
        - /opt/bin/flanneld
        args:
        - --ip-masq
        - --kube-subnet-mgr
        resources:
          requests:
            cpu: "100m"
            memory: "50Mi"
          limits:
            cpu: "100m"
            memory: "50Mi"
        securityContext:
          privileged: false
          capabilities:
             add: ["NET_ADMIN"]
        env:
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        volumeMounts:
        - name: run
          mountPath: /run/flannel
        - name: flannel-cfg
          mountPath: /etc/kube-flannel/
      volumes:
        - name: run
          hostPath:
            path: /run/flannel
        - name: cni
          hostPath:
            path: /etc/cni/net.d
        - name: flannel-cfg
          configMap:
            name: kube-flannel-cfg
EOF

kubeadm init --config kubeadm-init.yaml > kubeadm-init.log
cat kubeadm-init.log

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

kubectl apply -f  kube-flannel.yaml

for hname in ${NODE_HOSTNAMES[@]}
  do
    if [ "$hname" != "`hostname`" ];then
      echo ">>> ${hname}"
      echo "ssh root@${hname} \"`tail -2  kubeadm-init.log`\"" | sh -x
    fi
  done
 

 

 

 

 

 

 

#!/bin/bash

if [ $UID -ne 0 ]; then
    echo "本脚本需要使用root用户执行" 
    exit 0
fi

#先执行这个
kubeadm reset

#再执行这个
ifconfig cni0 down
ip link delete cni0
ifconfig flannel.1 down
ip link delete flannel.1
rm -rf /var/lib/cni/ 
rm -rf /etc/kubernetes
ipvsadm --clear
rm -rf ~/.kube

 

 

#!/usr/bin/bash

export NODE_HOSTNAMES=(node1 node2 node3 node4 node5)
export NODE_IPS=(192.168.6.61 192.168.6.62 192.168.6.63 192.168.6.64 192.168.6.65)
 

 

 

 

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