kubeadm安装kubernetes1.15.1

2019-12-06 14:47:19

环境准备：

k8s-master01 172.16.196.160  主节点
k8s-node01 172.16.196.136 node1
k8s-node02 172.16.196.137 node2
k8s-node03 172.16.196.161 node3

 

 

 

 

 

 

 

 

 

 1 这里以master01为例，其他节点都一样。可以自己扩容任意node节点个数
 2 //修改主机名
 3 hostnamectl set-hostname k8s-master01
 4 //安装通用基础包
 5 yum -y install conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstat libseccomp wget vim net-tools git lrzsz
 6 //关闭防火墙
 7 systemctl stop firewalld && systemctl disable firewalld
 8 //开启iptables
 9 yum -y install iptables-services && systemctl start iptables && systemctl enable iptables && iptables -F && service iptables save
10 //关闭swap分区
11 swapoff -a && sed -i 's/.*swap.*/#&/' /etc/fstab
12 //关闭selinux
13 setenforce 0 && sed -i 's#SELINUX=enforcing#SELINUX=disabled#g'  /etc/selinux/config
14 cat >> /etc/sysctl.conf<<EOF

　　  net.bridge.bridge-nf-call-ip6tables = 1

　　  net.bridge.bridge-nf-call-iptables = 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
 1 调整时间，修改系统日志
 2 timedatectl set-timezone Asia/Shanghai
 3 timedatectl set-local-rtc 0
 4 systemctl restart rsyslog crond
 5 mkdir /var/log/journal
 6 mkdir /etc/systemd/journald.conf.d
 7 cat > /etc/systemd/journald.conf.d/99-prophet <<EOF
[Journal]
Storage=persistent
 Compress=yes
 SyncIntervalSec=5m
 RateLimitInterval=30s
 RateLimitBurst=1000
 SystemMaxUse=10G
 SystemMaxFileSize=200M
 MaxRetentionSec=2week
 ForwardToSyslog=no
 EOF
19 systemctl restart systemd-journald

 

升级内核到4.4版本：

1 rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
2 yum --enablerepo=elrepo-kernel install -y kernel-lt
3 grub2-set-default "CentOS Linux (4.4.182-1.el7.elrepo.x86_64) 7 (Core)”
4 reboot
5 uname -r

 

添加ipvs模块：

1 modprobe br_netfilter
2 cat > /etc/sysconfig/modules/ipvs.modules <<EOF
 modprobe -- ip_vs
 modprobe -- ip_vs_rr
 modprobe -- ip_vs_wrr
 modprobe -- ip_vs_sh
 modprobe -- nf_conntrack_ipv4
 EOF
3 chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4

安装docker：

 1 yum -y install yum-utils device-mapper-persistent-data lvm2
 2 yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
 3 yum update -y && yum -y install docker-ce
 4 systemctl start docker && systemctl enable docker
 5 cat >/etc/docker/daemon.json <<EOF
 {
   "exec-opts": ["native.cgroupdriver=systemd"],
   "log-driver": "json-file",
   "log-opts": {
     "max-size": "100m"
   }
 }
6 EOF
7 mkdir -p /etc/systemd/system/docker.service.d
8 systemctl daemon-reload && systemctl restart docker

安装k8s：

 1 cat <<EOF > /etc/yum.repos.d/kubernetes.repo
 [kubernetes]
 name=Kubernetes
 baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
  enabled=1
 gpgcheck=0
 repo_gpgcheck=0
 gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg http:://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
 EOF
2 yum  install kubeadm-1.15.1 kubectl-1.15.1 kubelet-1.15.1
3 systemctl enable kubelet.service

查看所需要的镜像文件（注意需要DNS解析）：

kubeadm config images list
cat >> /etc/hosts <<EOF
172.16.196.160 k8s-master01
172.16.196.136 k8s-node01
172.16.196.137 k8s-node02
172.16.196.161 k8s-node03
EOF
链接：https://pan.baidu.com/s/1eZvMDQiRLIUASHwJN4YpVA 
提取码：4rrk

将镜像导入每个服务中：

1 docker load -i k8s1.15.1-image.tar.gz
//以上操作每个服务器都需要完成
在172.16.196.160服务器中：
2 kubeadm config print init-defaults > kubeadm.config.yaml
3 vim kubeadm.config.yaml
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 172.16.196.160
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  name: k8s-master01
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: k8s.gcr.io
kind: ClusterConfiguration
kubernetesVersion: v1.15.1
networking:
  dnsDomain: cluster.local
  podSubnet: "10.244.0.0/16"
  serviceSubnet: 10.96.0.0/12
scheduler: {}
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
featureGates:
  SupportIPVSProxyMode: true
mode: ipvs
4 kubeadm init --config=kubeadm.config.yaml --upload-certs | tee kubeadm-init.log
5 mkdir -p $HOME/.kube
6 sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
7 sudo chown $(id -u):$(id -g) $HOME/.kube/config
8 kubectl get node

此时主节点初始化完成并提示node节点加入主节点的命令：

 

 在node节点上执行提示操作

 

 在master节点上：

1 kubectl get nodes　　　　　　　　//发现都是NotReady状态，因为我们还没有安装flannel扁平化网络
2 kubectl apply -f ./kube-flannel.yaml
3 kubectl get nodes    //查看节点信息
4 kubectl get pod -n kube-system      //查看pod状态，需要等待一些时间

 

 

 

 

 

posted @ 2019-12-06 15:24  BachrRR  阅读(109)  评论(0)    收藏  举报