欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识！
您现在的位置是： 首页

Kubernetes 多master集群部署

程序员文章站 2022-07-13 22:24:22
...

1. 简介

测试环境Kubernetes 1.14.2版本高可用搭建文档，搭建方式为kubeadm

2. 服务器版本和架构信息

系统版本：CentOS Linux release 7.6.1810 (Core)
内核：4.4.184-1.el7.elrepo.x86_64    注意：有可能后面安装的内核版本高于此版本
Kubernetes: v1.14.2
Docker-ce: 18.06
网络组件：calico
硬件配置：16核64G

Keepalived保证apiserever服务器的IP高可用
Haproxy实现apiserver的负载均衡

3. 服务器角色规划

一定注意对应自己的服务器IP和主机名

master01/02节点上面部署了kubelet、keepalived、haproxy、controllmanager、apiserver、scheduler、docker、kube-proxy、calico组件

master03节点上面部署了kubelet、controllmanager、apiserver、scheduler、docker、kube-proxy、calico组件

node01/node02节点上面部署了kubelet、kube-proxy、docker、calico组件

其中除了kubelet和docker组件，其他组件都是以静态pod模式存在

节点名称 角色 IP 安装软件
负载VIP VIP 192.168.4.110  
master-01 master 192.168.4.129 kubeadm、kubelet、kubectl、docker、haproxy、keepalived
master-02 master 192.168.4.130 kubeadm、kubelet、kubectl、docker、haproxy、keepalived
master-03 master 192.168.4.133 kubeadm、kubelet、kubectl、docker
node-01 node 192.168.4.128 kubeadm、kubelet、kubectl、docker
node-03 node 192.168.4.132 kubeadm、kubelet、kubectl、docker
service网段   10.209.0.0/16  

4. 服务器初始化

4.1 关闭Selinux/firewalld/iptables(所有机器执行)

setenforce 0 \
&& sed -i 's/^SELINUX=.*$/SELINUX=disabled/' /etc/selinux/config \
&& getenforce

systemctl stop firewalld \
&& systemctl daemon-reload \
&& systemctl disable firewalld \
&& systemctl daemon-reload \
&& systemctl status firewalld

yum install -y iptables-services \
&& systemctl stop iptables \
&& systemctl disable iptables \
&& systemctl status iptables

4.2 为每台服务器添加host解析记录(所有机器执行)

cat >>/etc/hosts<<EOF
192.168.4.129 master01
192.168.4.130 master02
192.168.4.133 master03
192.168.4.128 node01
192.168.4.132 node03
EOF

4.3 更换阿里源(所有机器执行)

yum install wget -y
cp -r /etc/yum.repos.d /etc/yum.repos.d.bak
rm -f /etc/yum.repos.d/*.repo
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo \
&& wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

yum clean all && yum makecache

4.4 设置limits.conf(所有机器执行)

cat >> /etc/security/limits.conf <<EOF
# End of file
* soft nproc 10240000
* hard nproc 10240000
* soft nofile 10240000
* hard nofile 10240000
EOF

4.5 设置sysctl.conf(所有机器执行)

[ ! -e "/etc/sysctl.conf_bk" ] && /bin/mv /etc/sysctl.conf{,_bk} \
&& cat > /etc/sysctl.conf << EOF
fs.file-max=1000000
fs.nr_open=20480000
net.ipv4.tcp_max_tw_buckets = 180000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.ipv4.tcp_max_syn_backlog = 16384
net.core.netdev_max_backlog = 32768
net.core.somaxconn = 32768
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_fin_timeout = 20
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_syncookies = 1
#net.ipv4.tcp_tw_len = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_max_orphans = 3276800
net.ipv4.ip_local_port_range = 1024 65000
#net.nf_conntrack_max = 6553500
#net.netfilter.nf_conntrack_max = 6553500
#net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
#net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120
#net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120
#net.netfilter.nf_conntrack_tcp_timeout_established = 3600
EOF
sysctl -p

4.6 配置时间同步(所有机器执行)

ntpdate -u pool.ntp.org
crontab -e       #加入定时任务
*/15 * * * * /usr/sbin/ntpdate -u pool.ntp.org >/dev/null 2>&1

4.7 配置k8s.conf(所有机器执行)

cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
vm.swappiness=0
EOF

#执行命令使其修改生效
modprobe br_netfilter \
&& sysctl -p /etc/sysctl.d/k8s.conf

4.8 关闭交换分区(所有机器执行)

swapoff -a
yes | cp /etc/fstab /etc/fstab_bak
cat /etc/fstab_bak |grep -v swap > /etc/fstab

4.9 升级系统内核(所有机器执行)

yum update -y

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm ;yum --enablerepo=elrepo-kernel install kernel-lt-devel kernel-lt -y

查看内核修改结果
grub2-editenv list  

#注意，这里执行下面的命令会出现多个内核版本
[[email protected] ~]# cat /boot/grub2/grub.cfg |grep "menuentry "
menuentry 'CentOS Linux (4.4.184-1.el7.elrepo.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-862.el7.x86_64-advanced-021a955b-781d-425a-8250-f39857437658' 


设置默认内核版本，改版本必须已经存在，请注意执行命令cat /boot/grub2/grub.cfg |grep "menuentry "后生成的内容，切勿随意复制
grub2-set-default 'CentOS Linux (4.4.184-1.el7.elrepo.x86_64) 7 (Core)'

查看内核修改结果
grub2-editenv list  

# 检查默认内核版本高于4.1，否则请调整默认启动参数
# 查看内核修改结果
grub2-editenv list  

#重启以更换内核使其生效
reboot

4.10 加载ipvs模块(所有机器执行)

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_ipv4
EOF
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4

4.11 添加k8s yum源(所有机器执行)

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=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

4.12 安装服务器必备软件

yum -y install wget vim iftop iotop net-tools nmon telnet lsof iptraf nmap httpd-tools lrzsz mlocate ntp ntpdate strace libpcap nethogs iptraf iftop nmon bridge-utils bind-utils telnet nc nfs-utils rpcbind nfs-utils dnsmasq python python-devel tcpdump mlocate tree

5. 安装keepalived和haproxy

5.1 在master01和master02上安装keepalived和haproxy

master01的priority为250，master02的priority为200，其他配置一样。

master01(192.168.4.129)

vim /etc/keepalived/keepalived.conf

注意interface这个配置，配置成你服务器的网卡，切勿随意粘贴

! Configuration File for keepalived

global_defs {
   router_id LVS_DEVEL
}

vrrp_script check_haproxy {
    script "killall -0 haproxy"
    interval 3
    weight -2
    fall 10
    rise 2
}

vrrp_instance VI_1 {
    state MASTER
    interface ens160
    virtual_router_id 51
    priority 250
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 35f18af7190d51c9f7f78f37300a0cbd
    }
    virtual_ipaddress {
        192.168.4.110
    }
    track_script {
        check_haproxy
    }
}

master02(192.168.4.130)

vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   router_id LVS_DEVEL
}

vrrp_script check_haproxy {
    script "killall -0 haproxy"
    interval 3
    weight -2
    fall 10
    rise 2
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens160
    virtual_router_id 51
    priority 200
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 35f18af7190d51c9f7f78f37300a0cbd
    }
    virtual_ipaddress {
        192.168.4.110
    }
    track_script {
        check_haproxy
    }
}

5.2 haproxy配置

master01和master02的haproxy配置是一样的。此处我们监听的是192.168.4.110的8443端口，因为haproxy是和k8s apiserver是部署在同一台服务器上，都用6443会冲突。

192.168.4.129
vim /etc/haproxy/haproxy.cfg

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    #log         127.0.0.1 local2
    log 127.0.0.1 local0 info

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

#---------------------------------------------------------------------
# kubernetes apiserver frontend which proxys to the backends
#---------------------------------------------------------------------
frontend kubernetes-apiserver
    mode                 tcp
    bind                 *:8443
    option               tcplog
    default_backend      kubernetes-apiserver

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend kubernetes-apiserver
    mode        tcp
    balance     roundrobin
    server master01 192.168.4.129:6443 check
    server master02 192.168.4.130:6443 check
    server master03 192.168.4.133:6443 check

#---------------------------------------------------------------------
# collection haproxy statistics message
#---------------------------------------------------------------------
listen stats
    bind                 *:1080
    stats auth           admin:awesomePassword
    stats refresh        5s
    stats realm          HAProxy\ Statistics
    stats uri            /admin?stats

192.168.4.130
vim /etc/haproxy/haproxy.cfg

#---------------------------------------------------------------------

# Global settings

#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    #log         127.0.0.1 local2
    log 127.0.0.1 local0 info

​```
chroot      /var/lib/haproxy
pidfile     /var/run/haproxy.pid
maxconn     4000
user        haproxy
group       haproxy
daemon

# turn on stats unix socket
stats socket /var/lib/haproxy/stats
​```

#---------------------------------------------------------------------

# common defaults that all the 'listen' and 'backend' sections will

# use if not designated in their block

#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

#---------------------------------------------------------------------

# kubernetes apiserver frontend which proxys to the backends

#---------------------------------------------------------------------
frontend kubernetes-apiserver
    mode                 tcp
    bind                 *:8443
    option               tcplog
    default_backend      kubernetes-apiserver

#---------------------------------------------------------------------

# round robin balancing between the various backends

#---------------------------------------------------------------------
backend kubernetes-apiserver
    mode        tcp
    balance     roundrobin
    server master01 192.168.4.129:6443 check
    server master02 192.168.4.130:6443 check
    server master03 192.168.4.133:6443 check

#---------------------------------------------------------------------

# collection haproxy statistics message

#---------------------------------------------------------------------
listen stats
    bind                 *:1080
    stats auth           admin:awesomePassword
    stats refresh        5s
    stats realm          HAProxy\ Statistics
    stats uri            /admin?stats

5.3 设置服务启动顺序及依赖关系（master01和master02操作）

vim /usr/lib/systemd/system/keepalived.service

[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target haproxy.service
Requires=haproxy.service

5.4 启动服务

systemctl enable keepalived && systemctl start keepalived \
&& systemctl enable haproxy && systemctl start haproxy && systemctl status keepalived && systemctl status haproxy

6.安装docker

6.1 安装必要的一些系统工具（所有服务器安装）

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

6.2 添加软件源信息（所有服务器配置）

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

yum list docker-ce --showduplicates | sort -r

yum -y install docker-ce-18.06.3.ce-3.el7

usermod -aG docker bumblebee

6.3 配置daemon.json文件（所有服务器配置）

mkdir -p /etc/docker/ \
&& cat > /etc/docker/daemon.json << EOF
{
    "registry-mirrors":[
        "https://c6ai9izk.mirror.aliyuncs.com"
    ],
    "max-concurrent-downloads":3,
    "data-root":"/data/docker",
    "log-driver":"json-file",
    "log-opts":{
        "max-size":"100m",
        "max-file":"1"
    },
    "max-concurrent-uploads":5,
    "storage-driver":"overlay2",
    "storage-opts": [
    "overlay2.override_kernel_check=true"
  ]
}
EOF

6.4 启动检查docker服务

systemctl enable docker \
&& systemctl restart docker \
&& systemctl status docker

7 使用kubeadm部署kubernetes

7.1 配置kubernetes.repo(每台机器都需要配置)

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

7.2 安装必备软件(所有机器安装)

yum install -y kubelet-1.14.2 kubeadm-1.14.2 kubectl-1.14.2 ipvsadm ipset

#设置kubelet开机自启动,注意：这一步不能直接执行 systemctl start kubelet，会报错，成功初始化完后kubelet会自动起来
systemctl enable kubelet

7.3 修改初始化配置

使用kubeadm config print init-defaults > kubeadm-init.yaml 打印出默认配置，然后在根据自己的环境修改配置

注意需要修改advertiseAddress、controlPlaneEndpoint、imageRepository、serviceSubnet

其中advertiseAddress为master01的ip，controlPlaneEndpoint为VIP+8443端口，imageRepository修改为阿里的源，serviceSubnet找网络组要一段没人使用的IP段

[[email protected] ~]# cat kubeadm-init.yaml 
apiVersion: kubeadm.k8s.io/v1beta1
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 192.168.4.129
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  name: master01
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta1
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controlPlaneEndpoint: "192.168.4.110:8443"
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.14.2
networking:
  dnsDomain: cluster.local
  podSubnet: ""
  serviceSubnet: "10.209.0.0/16"
scheduler: {}

7.4 预下载镜像

[[email protected] ~]# kubeadm config images pull --config kubeadm-init.yaml
[config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.14.2
[config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.14.2
[config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.14.2
[config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.14.2
[config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1
[config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.3.10
[config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.3.1

7.5 初始化

[[email protected] ~]# kubeadm init --config kubeadm-init.yaml
[init] Using Kubernetes version: v1.14.2
[preflight] Running pre-flight checks
    [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Activating the kubelet service
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [master01 localhost] and IPs [192.168.4.129 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [master01 localhost] and IPs [192.168.4.129 127.0.0.1 ::1]
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [master01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.209.0.1 192.168.4.129 192.168.4.110]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "admin.conf" kubeconfig file
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 17.506253 seconds
[upload-config] storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config-1.14" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Skipping phase. Please see --experimental-upload-certs
[mark-control-plane] Marking the node master01 as control-plane by adding the label "node-role.kubernetes.io/master=''"
[mark-control-plane] Marking the node master01 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]
[bootstrap-token] Using token: abcdef.0123456789abcdef
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] creating the "cluster-info" ConfigMap in the "kube-public" namespace
[addons] Applied essential addon: CoreDNS
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[addons] Applied essential addon: kube-proxy

Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

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

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of control-plane nodes by copying certificate authorities 
and service account keys on each node and then running the following as root:

  kubeadm join 192.168.4.110:8443 --token abcdef.0123456789abcdef \
    --discovery-token-ca-cert-hash sha256:0ca0a5fd28409faecba5d2f21aeb010a945a5dae42023fe361424d621708edc1 \
    --experimental-control-plane      

Then you can join any number of worker nodes by running the following on each as root:

kubeadm join 192.168.4.110:8443 --token abcdef.0123456789abcdef \
    --discovery-token-ca-cert-hash sha256:0ca0a5fd28409faecba5d2f21aeb010a945a5dae42023fe361424d621708edc1

kubeadm init主要执行了以下操作：

  • [init]：指定版本进行初始化操作
  • [preflight] ：初始化前的检查和下载所需要的Docker镜像文件
  • [kubelet-start] ：生成kubelet的配置文件”/var/lib/kubelet/config.yaml”，没有这个文件kubelet无法启动，所以初始化之前的kubelet实际上启动失败。
  • [certificates]：生成Kubernetes使用的证书，存放在/etc/kubernetes/pki目录中。
  • [kubeconfig] ：生成 KubeConfig 文件，存放在/etc/kubernetes目录中，组件之间通信需要使用对应文件。
  • [control-plane]：使用/etc/kubernetes/manifest目录下的YAML文件，安装 Master 组件。
  • [etcd]：使用/etc/kubernetes/manifest/etcd.yaml安装Etcd服务。
  • [wait-control-plane]：等待control-plan部署的Master组件启动。
  • [apiclient]：检查Master组件服务状态。
  • [uploadconfig]：更新配置
  • [kubelet]：使用configMap配置kubelet。
  • [patchnode]：更新CNI信息到Node上，通过注释的方式记录。
  • [mark-control-plane]：为当前节点打标签，打了角色Master，和不可调度标签，这样默认就不会使用Master节点来运行Pod。
  • [bootstrap-token]：生成token记录下来，后边使用kubeadm join往集群中添加节点时会用到
  • [addons]：安装附加组件CoreDNS和kube-proxy

7.6 为kubectl准备Kubeconfig文件

kubectl默认会在执行的用户家目录下面的.kube目录下寻找config文件。这里是将在初始化时[kubeconfig]步骤生成的admin.conf拷贝到.kube/config。

[[email protected] ~]# mkdir -p $HOME/.kube
[[email protected] ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[[email protected] ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config

在该配置文件中，记录了API Server的访问地址，所以后面直接执行kubectl命令就可以正常连接到API Server中。

7.7 查看组件状态

[[email protected] ~]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok                  
scheduler            Healthy   ok                  
etcd-0               Healthy   {"health":"true"}   
[[email protected] ~]# kubectl get nodes
NAME       STATUS     ROLES    AGE     VERSION
master01   NotReady   master   4m20s   v1.14.2

目前只有一个节点，角色是Master，状态是NotReady，状态是NotReady状态是因为还没有安装网络插件

7.8 其他master部署(在master01机器上执行)

在master01将证书文件拷贝至master02、master03节点

#拷贝正式至master02节点
USER=root
CONTROL_PLANE_IPS="master02"
for host in ${CONTROL_PLANE_IPS}; do
    ssh "${USER}"@$host "mkdir -p /etc/kubernetes/pki/etcd"
    scp /etc/kubernetes/pki/ca.* "${USER}"@$host:/etc/kubernetes/pki/
    scp /etc/kubernetes/pki/sa.* "${USER}"@$host:/etc/kubernetes/pki/
    scp /etc/kubernetes/pki/front-proxy-ca.* "${USER}"@$host:/etc/kubernetes/pki/
    scp /etc/kubernetes/pki/etcd/ca.* "${USER}"@$host:/etc/kubernetes/pki/etcd/
    scp /etc/kubernetes/admin.conf "${USER}"@$host:/etc/kubernetes/
done


#拷贝正式至master03节点
USER=root
CONTROL_PLANE_IPS="master03"
for host in ${CONTROL_PLANE_IPS}; do
    ssh "${USER}"@$host "mkdir -p /etc/kubernetes/pki/etcd"
    scp /etc/kubernetes/pki/ca.* "${USER}"@$host:/etc/kubernetes/pki/
    scp /etc/kubernetes/pki/sa.* "${USER}"@$host:/etc/kubernetes/pki/
    scp /etc/kubernetes/pki/front-proxy-ca.* "${USER}"@$host:/etc/kubernetes/pki/
    scp /etc/kubernetes/pki/etcd/ca.* "${USER}"@$host:/etc/kubernetes/pki/etcd/
    scp /etc/kubernetes/admin.conf "${USER}"@$host:/etc/kubernetes/
done

在master02上执行，注意注意--experimental-control-plane参数

[[email protected] ~]# kubeadm join 192.168.4.110:8443 --token abcdef.0123456789abcdef \
>     --discovery-token-ca-cert-hash sha256:0ca0a5fd28409faecba5d2f21aeb010a945a5dae42023fe361424d621708edc1 \
>     --experimental-control-plane
[preflight] Running pre-flight checks
    [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml'
[preflight] Running pre-flight checks before initializing the new control plane instance
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [master02 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.209.0.1 192.168.4.130 192.168.4.110]
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [master02 localhost] and IPs [192.168.4.130 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [master02 localhost] and IPs [192.168.4.130 127.0.0.1 ::1]
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Valid certificates and keys now exist in "/etc/kubernetes/pki"
[certs] Using the existing "sa" key
[kubeconfig] Generating kubeconfig files
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Using existing kubeconfig file: "/etc/kubernetes/admin.conf"
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[check-etcd] Checking that the etcd cluster is healthy
[kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.14" ConfigMap in the kube-system namespace
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Activating the kubelet service
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
[etcd] Announced new etcd member joining to the existing etcd cluster
[etcd] Wrote Static Pod manifest for a local etcd member to "/etc/kubernetes/manifests/etcd.yaml"
[etcd] Waiting for the new etcd member to join the cluster. This can take up to 40s
[upload-config] storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[mark-control-plane] Marking the node master02 as control-plane by adding the label "node-role.kubernetes.io/master=''"
[mark-control-plane] Marking the node master02 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]

This node has joined the cluster and a new control plane instance was created:

* Certificate signing request was sent to apiserver and approval was received.
* The Kubelet was informed of the new secure connection details.
* Control plane (master) label and taint were applied to the new node.
* The Kubernetes control plane instances scaled up.
* A new etcd member was added to the local/stacked etcd cluster.

To start administering your cluster from this node, you need to run the following as a regular user:

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

Run 'kubectl get nodes' to see this node join the cluster.

注意**：token有效期是有限的，如果旧的token过期，可以使用kubeadm token create --print-join-command重新创建一条token。

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

在master03上执行，注意注意--experimental-control-plane参数

[[email protected] ~]# kubeadm join 192.168.4.110:8443 --token abcdef.0123456789abcdef \
>     --discovery-token-ca-cert-hash sha256:0ca0a5fd28409faecba5d2f21aeb010a945a5dae42023fe361424d621708edc1 \
>     --experimental-control-plane
[preflight] Running pre-flight checks
    [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml'
[preflight] Running pre-flight checks before initializing the new control plane instance
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [master03 localhost] and IPs [192.168.4.133 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [master03 localhost] and IPs [192.168.4.133 127.0.0.1 ::1]
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [master03 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.209.0.1 192.168.4.133 192.168.4.110]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Valid certificates and keys now exist in "/etc/kubernetes/pki"
[certs] Using the existing "sa" key
[kubeconfig] Generating kubeconfig files
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address
[kubeconfig] Using existing kubeconfig file: "/etc/kubernetes/admin.conf"
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[check-etcd] Checking that the etcd cluster is healthy
[kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.14" ConfigMap in the kube-system namespace
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Activating the kubelet service
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
[etcd] Announced new etcd member joining to the existing etcd cluster
[etcd] Wrote Static Pod manifest for a local etcd member to "/etc/kubernetes/manifests/etcd.yaml"
[etcd] Waiting for the new etcd member to join the cluster. This can take up to 40s
[upload-config] storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[mark-control-plane] Marking the node master03 as control-plane by adding the label "node-role.kubernetes.io/master=''"
[mark-control-plane] Marking the node master03 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule]

This node has joined the cluster and a new control plane instance was created:

* Certificate signing request was sent to apiserver and approval was received.
* The Kubelet was informed of the new secure connection details.
* Control plane (master) label and taint were applied to the new node.
* The Kubernetes control plane instances scaled up.
* A new etcd member was added to the local/stacked etcd cluster.

To start administering your cluster from this node, you need to run the following as a regular user:

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

Run 'kubectl get nodes' to see this node join the cluster.
[[email protected] ~]# mkdir -p $HOME/.kube \
> && cp -i /etc/kubernetes/admin.conf $HOME/.kube/config \
> && chown $(id -u):$(id -g) $HOME/.kube/config
[[email protected] ~]# kubectl get nodes
NAME       STATUS     ROLES    AGE     VERSION
master01   NotReady   master   15m     v1.14.2
master02   NotReady   master   3m40s   v1.14.2
master03   NotReady   master   2m1s    v1.14.2

8. node节点部署

在node01、node02执行,注意没有--experimental-control-plane参数

注意**：token有效期是有限的，如果旧的token过期，可以在master节点上使用kubeadm token create --print-join-command重新创建一条token。

在node01和node02上执行下面这条命令

kubeadm join 192.168.4.110:8443 --token lwsk91.y2ywpq0y74wt03tb     --discovery-token-ca-cert-hash sha256:0ca0a5fd28409faecba5d2f21aeb010a945a5dae42023fe361424d621708edc1

9. 部署网络插件calico

9.1 下载calico.yaml文件

wget -c https://docs.projectcalico.org/v3.6/getting-started/kubernetes/installation/hosted/kubernetes-datastore/calico-networking/1.7/calico.yaml

9.2 修改calico.yaml（根据实际情况配置）

修改CALICO_IPV4POOL_CIDR这个下面的vaule值，默认是192.168.0.0/16

        # The default IPv4 pool to create on startup if none exists. Pod IPs will be
        # chosen from this range. Changing this value after installation will have
        # no effect. This should fall within `--cluster-cidr`.
        - name: CALICO_IPV4POOL_CIDR
          value: "10.209.0.0/16"

9.3 执行kubectl apply -f calico.yaml

[[email protected] ~]# kubectl apply -f calico.yaml
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.extensions/calico-node created
serviceaccount/calico-node created
deployment.extensions/calico-kube-controllers created
serviceaccount/calico-kube-controllers created

9.4 查看节点状态

一开始没安装网络组件，是显示notReady的，装完cailco后就变成Ready，说明集群已就绪了，可以进行下一步验证集群是否搭建成功

[[email protected] ~]# kubectl get nodes
NAME       STATUS     ROLES    AGE   VERSION
master01   Ready      master   23h   v1.14.2
master02   Ready      master   22h   v1.14.2
master03   Ready      master   22h   v1.14.2
node01     NotReady   <none>   19m   v1.14.2
node03     NotReady   <none>   5s    v1.14.2

10. kube-proxy开启ipvs[单个master节点执行]

10.1 修改ConfigMap的kube-system/kube-proxy中的config.conf，mode: "ipvs"：

kubectl edit cm kube-proxy -n kube-system

10.2 之后重启各个节点上的kube-proxy pod：

[[email protected] ~]# kubectl get pod -n kube-system | grep kube-proxy | awk '{system("kubectl delete pod "$1" -n kube-system")}'
pod "kube-proxy-8fpjb" deleted
pod "kube-proxy-dqqxh" deleted
pod "kube-proxy-mxvz2" deleted
pod "kube-proxy-np9x9" deleted
pod "kube-proxy-rtzcn" deleted

10.3 查看kube-proxy pod状态

[[email protected] ~]# kubectl get pod -n kube-system | grep kube-proxy
kube-proxy-4fhpg                           1/1     Running   0          81s
kube-proxy-9f2x6                           1/1     Running   0          109s
kube-proxy-cxl5m                           1/1     Running   0          89s
kube-proxy-lvp9q                           1/1     Running   0          78s
kube-proxy-v4mg8                           1/1     Running   0          99s

10.4 查看是否开启了ipvs

日志中打印出了Using ipvs Proxier，说明ipvs模式已经开启

[[email protected] ~]# kubectl logs kube-proxy-4fhpg -n kube-system
I0705 07:53:05.254157       1 server_others.go:176] Using ipvs Proxier.
W0705 07:53:05.255130       1 proxier.go:380] clusterCIDR not specified, unable to distinguish between internal and external traffic
W0705 07:53:05.255181       1 proxier.go:386] IPVS scheduler not specified, use rr by default
I0705 07:53:05.255599       1 server.go:562] Version: v1.14.2
I0705 07:53:05.280930       1 conntrack.go:52] Setting nf_conntrack_max to 131072
I0705 07:53:05.281426       1 config.go:102] Starting endpoints config controller
I0705 07:53:05.281473       1 controller_utils.go:1027] Waiting for caches to sync for endpoints config controller
I0705 07:53:05.281523       1 config.go:202] Starting service config controller
I0705 07:53:05.281548       1 controller_utils.go:1027] Waiting for caches to sync for service config controller
I0705 07:53:05.381724       1 controller_utils.go:1034] Caches are synced for endpoints config controller
I0705 07:53:05.381772       1 controller_utils.go:1034] Caches are synced for service config controller

11. 查看ipvs状态

[[email protected] ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  10.209.0.1:443 rr
  -> 192.168.4.129:6443            Masq    1      0          0         
  -> 192.168.4.130:6443            Masq    1      0          0         
  -> 192.168.4.133:6443            Masq    1      0          0         
TCP  10.209.0.10:53 rr
  -> 10.209.59.193:53             Masq    1      0          0         
  -> 10.209.59.194:53             Masq    1      0          0         
TCP  10.209.0.10:9153 rr
  -> 10.209.59.193:9153           Masq    1      0          0         
  -> 10.209.59.194:9153           Masq    1      0          0         
UDP  10.209.0.10:53 rr
  -> 10.209.59.193:53             Masq    1      0          0         
  -> 10.209.59.194:53             Masq    1      0          0

12. 测试一个运行一个容器

[[email protected] ~]# kubectl run nginx --image=nginx:1.14 --replicas=2
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
deployment.apps/nginx created

12.1 查看nginx pod

[[email protected] ~]# kubectl get pods -o wide
NAME                     READY   STATUS    RESTARTS   AGE   IP               NODE     NOMINATED NODE   READINESS GATES
nginx-84b67f57c4-d9k8m   1/1     Running   0          59s   10.209.196.129   node01   <none>           <none>
nginx-84b67f57c4-zcrxn   1/1     Running   0          59s   10.209.186.193   node03   <none>           <none>

12.2 通过curl命令测试nginx

[[email protected] ~]# curl 10.209.196.129
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>
[[email protected] ~]# curl 10.209.186.193
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>

<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>

<p><em>Thank you for using nginx.</em></p>
</body>
</html>

能显示出Welcome to nginx，说明pod运行正常，间接也说明集群可以正常使用

13. 测试dns

进入后执行nslookup kubernetes.default

[[email protected] ~]# kubectl run curl --image=radial/busyboxplus:curl -it
kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.
If you don't see a command prompt, try pressing enter.
[ [email protected]:/ ]$ nslookup kubernetes.default
Server:    10.209.0.10
Address 1: 10.209.0.10 kube-dns.kube-system.svc.cluster.local

Name:      kubernetes.default
Address 1: 10.209.0.1 kubernetes.default.svc.cluster.local    #能显示类似这样的输出，说明dns是okay的

至此kubernetes集群部署完成。

上一篇： Kubernetes部署(三)-部署master组件、node节点

下一篇： Kubernetes 集群部署之Master部署

推荐阅读