K8s完整单节点二进制部署（实战必备！）

搭建步骤：

1：自签ETCD证书
2：ETCD部署
3：Node安装docker
4：Flannel部署（先写入子网到etcd）
---------master----------
5：自签APIServer证书
6：部署APIServer组件（token，csv）
7：部署controller-manager（指定apiserver证书）和scheduler组件
----------node----------
8：生成kubeconfig（bootstrap，kubeconfig和kube-proxy.kubeconfig）
9：部署kubelet组件
10：部署kube-proxy组件
----------加入群集----------
11：kubectl get csr && kubectl certificate approve 允许办法证书，加入群集
12：添加一个node节点
13：查看kubectl get node 节点

环境准备：

master节点：

CentOS 7-3：192.168.18.128

node节点：

CentOS 7-4：192.168.18.148 docker

CentOS 7-5：192.168.18.145 docker

Mester7-3：

[root@master ~]# mkdir k8s
[root@master ~]# cd k8s/
[root@master k8s]# mkdir etcd-cert
[root@master k8s]# mv etcd-cert.sh etcd-cert
[root@master k8s]# ls
etcd-cert  etcd.sh
[root@master k8s]# vim cfssl.sh
curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo
[root@master k8s]# bash cfssl.sh
[root@master k8s]# ls /usr/local/bin/
cfssl  cfssl-certinfo  cfssljson
[root@master k8s]# cd etcd-cert/
`定义CA证书`
cat > ca-config.json <<EOF
{
  "signing":{
    "default":{
      "expiry":"87600h"
    },
    "profiles":{
      "www":{
        "expiry":"87600h",
        "usages":[
          "signing",
          "key encipherment",
          "server auth",
          "client auth"
        ]
      }
    }
  }
}
EOF

`实现证书签名`
cat > ca-csr.json <<EOF
{
    "CN":"etcd CA",
    "key":{
        "algo":"rsa",
        "size":2048
    },
    "names":[
        {
            "C":"CN",
            "L":"Nanjing",
            "ST":"Nanjing"
        }
    ]
}
EOF

`生产证书，生成ca-key.pem  ca.pem`
[root@master etcd-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2020/01/15 11:26:22 [INFO] generating a new CA key and certificate from CSR
2020/01/15 11:26:22 [INFO] generate received request
2020/01/15 11:26:22 [INFO] received CSR
2020/01/15 11:26:22 [INFO] generating key: rsa-2048
2020/01/15 11:26:23 [INFO] encoded CSR
2020/01/15 11:26:23 [INFO] signed certificate with serial number 58994014244974115135502281772101176509863440005

`指定etcd三个节点之间的通信验证`
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.18.128",
    "192.168.18.148",
    "192.168.18.145"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "NanJing",
            "ST": "NanJing"
        }
    ]
}
EOF

`生成ETCD证书 server-key.pem   server.pem`
[root@master etcd-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
2020/01/15 11:28:07 [INFO] generate received request
2020/01/15 11:28:07 [INFO] received CSR
2020/01/15 11:28:07 [INFO] generating key: rsa-2048
2020/01/15 11:28:07 [INFO] encoded CSR
2020/01/15 11:28:07 [INFO] signed certificate with serial number 153451631889598523484764759860297996765909979890
2020/01/15 11:28:07 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

上传以下三个压缩包进行解压：

[root@master etcd-cert]# ls
ca-config.json  etcd-cert.sh                          server-csr.json
ca.csr          etcd-v3.3.10-linux-amd64.tar.gz       server-key.pem
ca-csr.json     flannel-v0.10.0-linux-amd64.tar.gz    server.pem
ca-key.pem      kubernetes-server-linux-amd64.tar.gz
ca.pem          server.csr
[root@master etcd-cert]# mv *.tar.gz ../
[root@master etcd-cert]# cd ../
[root@master k8s]# ls
cfssl.sh   etcd.sh                          flannel-v0.10.0-linux-amd64.tar.gz
etcd-cert  etcd-v3.3.10-linux-amd64.tar.gz  kubernetes-server-linux-amd64.tar.gz
[root@master k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz
[root@master k8s]# ls etcd-v3.3.10-linux-amd64
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md
[root@master k8s]# mkdir /opt/etcd/{cfg,bin,ssl} -p
[root@master k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/

`证书拷贝`
[root@master k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/

`进入卡住状态等待其他节点加入`
[root@master k8s]# bash etcd.sh etcd01 192.168.18.128 etcd02=https://192.168.18.148:2380,etcd03=https://192.168.18.145:2380
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service.

此时新打开一个7-3的远程连接终端：

[root@master ~]# ps -ef | grep etcd
root       3479   1780  0 11:48 pts/0    00:00:00 bash etcd.sh etcd01 192.168.18.128 etcd02=https://192.168.195.148:2380,etcd03=https://192.168.195.145:2380
root       3530   3479  0 11:48 pts/0    00:00:00 systemctl restart etcd
root       3540      1  1 11:48 ?        00:00:00 /opt/etcd/bin/etcd 
--name=etcd01 --data-dir=/var/lib/etcd/default.etcd 
--listen-peer-urls=https://192.168.18.128:2380 
--listen-client-urls=https://192.168.18.128:2379,http://127.0.0.1:2379 
--advertise-client-urls=https://192.168.18.128:2379 
--initial-advertise-peer-urls=https://192.168.18.128:2380 
--initial-cluster=etcd01=https://192.168.18.128:2380,etcd02=https://192.168.195.148:2380,etcd03=https://192.168.195.145:2380 
--initial-cluster-token=etcd-cluster 
--initial-cluster-state=new 
--cert-file=/opt/etcd/ssl/server.pem 
--key-file=/opt/etcd/ssl/server-key.pem 
--peer-cert-file=/opt/etcd/ssl/server.pem 
--peer-key-file=/opt/etcd/ssl/server-key.pem 
--trusted-ca-file=/opt/etcd/ssl/ca.pem 
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem
root       3623   3562  0 11:49 pts/1    00:00:00 grep --color=auto etcd

`拷贝证书去其他节点`
[root@master k8s]# scp -r /opt/etcd/ root@192.168.18.148:/opt/
The authenticity of host '192.168.18.148 (192.168.18.148)' can't be established.
ECDSA key fingerprint is SHA256:mTT+FEtzAu4X3D5srZlz93S3gye8MzbqVZFDzfJd4Gk.
ECDSA key fingerprint is MD5:fa:5a:88:23:49:60:9b:b8:7e:4b:14:4b:3f:cd:96:a0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.18.148' (ECDSA) to the list of known hosts.
root@192.168.18.148's password:
etcd                                                       100%  518   426.8KB/s   00:00
etcd                                                       100%   18MB 105.0MB/s   00:00
etcdctl                                                    100%   15MB 108.2MB/s   00:00
ca-key.pem                                                 100% 1679     1.4MB/s   00:00
ca.pem                                                     100% 1265   396.1KB/s   00:00
server-key.pem                                             100% 1675     1.0MB/s   00:00
server.pem                                                 100% 1338   525.6KB/s   00:00
[root@master k8s]# scp -r /opt/etcd/ root@192.168.18.145:/opt/
The authenticity of host '192.168.18.145 (192.168.18.145)' can't be established.
ECDSA key fingerprint is SHA256:mTT+FEtzAu4X3D5srZlz93S3gye8MzbqVZFDzfJd4Gk.
ECDSA key fingerprint is MD5:fa:5a:88:23:49:60:9b:b8:7e:4b:14:4b:3f:cd:96:a0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.18.145' (ECDSA) to the list of known hosts.
root@192.168.18.145's password:
etcd                                                       100%  518   816.5KB/s   00:00
etcd                                                       100%   18MB  87.4MB/s   00:00
etcdctl                                                    100%   15MB 108.6MB/s   00:00
ca-key.pem                                                 100% 1679     1.3MB/s   00:00
ca.pem                                                     100% 1265   411.8KB/s   00:00
server-key.pem                                             100% 1675     1.4MB/s   00:00
server.pem                                                 100% 1338   639.5KB/s   00:00

`启动脚本拷贝其他节点`
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.18.148:/usr/lib/systemd/system/
root@192.168.18.148's password:
etcd.service                                               100%  923   283.4KB/s   00:00
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.18.145:/usr/lib/systemd/system/
root@192.168.18.145's password:
etcd.service                                               100%  923   347.7KB/s   00:00

Node1：7-4

`修改`
[root@node1 ~]# systemctl stop firewalld.service
[root@node1 ~]# setenforce 0
[root@node1 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.18.148:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.18.148:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.18.148:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.18.148:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.18.128:2380,etcd02=https://192.168.18.148:2380,etcd03=https://192.168.18.145:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

[root@node1 ~]# systemctl start etcd
[root@node1 ~]# systemctl status etcd
● etcd.service - Etcd Server
   Loaded: loaded (/usr/lib/systemd/system/etcd.service; disabled; vendor preset: disabled)
   Active: active (running) since 三 2020-01-15 17:53:24 CST; 5s ago
#状态为Active

Node2：7-5

`修改`
[root@node2 ~]# systemctl stop firewalld.service
[root@node2 ~]# setenforce 0
[root@node2 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.18.145:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.18.145:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.18.145:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.18.145:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.18.128:2380,etcd02=https://192.168.18.148:2380,etcd03=https://192.168.18.145:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

[root@node2 ~]# systemctl start etcd
[root@node2 ~]# systemctl status etcd
● etcd.service - Etcd Server
   Loaded: loaded (/usr/lib/systemd/system/etcd.service; disabled; vendor preset: disabled)
   Active: active (running) since 三 2020-01-15 17:55:24 CST; 5s ago
 #状态为Active

群集状态验证：

`回到7-3上输入以下命令：`
[root@master k8s]# cd etcd-cert/
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379" cluster-health
member 9104d301e3b6da41 is healthy: got healthy result from https://192.168.18.148:2379
member 92947d71c72a884e is healthy: got healthy result from https://192.168.18.145:2379
member b2a6d67e1bc8054b is healthy: got healthy result from https://192.168.18.128:2379
cluster is healthy
`状态为healthy健康`

两台节点服务器部署docker引擎

node1：

`安装依赖包`
[root@node1 ~]# yum install yum-utils device-mapper-persistent-data lvm2 -y

`设置阿里云镜像源`
[root@node1 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

`安装Docker-ce`
[root@node1 ~]# yum install -y docker-ce

`启动Docker并设置为开机自启动`
[root@node1 ~]# systemctl start docker.service
[root@node1 ~]# systemctl enable docker.service
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

`检查相关进程开启情况`
[root@node1 ~]# ps aux | grep docker
root       5551  0.1  3.6 565460 68652 ?        Ssl  09:13   0:00 /usr/bin/docke d -H fd:// --containerd=/run/containerd/containerd.sock
root       5759  0.0  0.0 112676   984 pts/1    R+   09:16   0:00 grep --color=auto docker

`镜像加速服务`
[root@node1 ~]# tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://w1ogxqvl.mirror.aliyuncs.com"]
}
EOF

#网络优化部分
echo 'net.ipv4.ip_forward=1' > /etc/sysctl.cnf
sysctl -p

[root@node1 ~]# service network restart
Restarting network (via systemctl):                        [  确定  ]
[root@node1 ~]# systemctl restart docker

[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker

node2：

`安装依赖包`
[root@node2 ~]# yum install yum-utils device-mapper-persistent-data lvm2 -y

`设置阿里云镜像源`
[root@node2 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

`安装Docker-ce`
[root@node2 ~]# yum install -y docker-ce

`启动Docker并设置为开机自启动`
[root@node2 ~]# systemctl start docker.service
[root@node2 ~]# systemctl enable docker.service
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

`检查相关进程开启情况`
[root@node2 ~]# ps aux | grep docker
root       5570  0.5  3.5 565460 66740 ?        Ssl  09:18   0:00 /usr/bin/docke d -H fd:// --containerd=/run/containerd/containerd.sock
root       5759  0.0  0.0 112676   984 pts/1    R+   09:18   0:00 grep --color=auto docker

`镜像加速服务`
[root@node2 ~]# tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://w1ogxqvl.mirror.aliyuncs.com"]
}
EOF

[root@node2 ~]# service network restart
Restarting network (via systemctl):                        [  确定  ]
[root@node2 ~]# systemctl restart docker

[root@node2 ~]# systemctl daemon-reload
[root@node2 ~]# systemctl restart docker

flannel网络配置

`在master服务器中写入分配的子网段到ETCD中，供flannel使用`
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

`查看写入的信息`
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379" get /coreos.com/network/config

{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

`将flannel的软件包拷贝到所有node节点（只需要部署在node节点即可）`
[root@master etcd-cert]# cd ../
[root@master k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.18.148:/root
root@192.168.18.148's password:
flannel-v0.10.0-linux-amd64.tar.gz             100% 9479KB  55.6MB/s   00:00
[root@master k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.18.145:/root
root@192.168.18.145's password:
flannel-v0.10.0-linux-amd64.tar.gz             100% 9479KB  69.5MB/s   00:00

在所有node节点进行解压操作

node1：

[root@node1 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz

`创建k8s工作目录`
[root@node1 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node1 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/

[root@node1 ~]# vim flannel.sh
#!/bin/bash

ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"}

cat <<EOF >/opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \
-etcd-cafile=/opt/etcd/ssl/ca.pem \
-etcd-certfile=/opt/etcd/ssl/server.pem \
-etcd-keyfile=/opt/etcd/ssl/server-key.pem"

EOF

cat <<EOF >/usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

EOF

systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld

`开启flannel网络功能`
[root@node1 ~]# bash flannel.sh https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.

`配置docker连接flannel`
[root@node1 ~]# vim /usr/lib/systemd/system/docker.service
#service段落做如下改动
9 [Service]
10 Type=notify
11 # the default is not to use systemd for cgroups because the delegate issues s    till
12 # exists and systemd currently does not support the cgroup feature set requir    ed
13 # for containers run by docker
14 EnvironmentFile=/run/flannel/subnet.env      #在13下添加此行
15 ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run    /containerd/containerd.sock     #15行中在-H前添加$DOCKER_NETWORK_OPTIONS
16 ExecReload=/bin/kill -s HUP $MAINPID
17 TimeoutSec=0
18 RestartSec=2
19 Restart=always
#修改完成后按Esc退出插入模式，输入:wq保存退出

[root@node1 ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.32.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=172.17.32.1/24 --ip-masq=false --mtu=1450"
#此处bip指定启动时的子网

`重启docker服务`
[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker

`查看flannel网络`
[root@node1 ~]# ifconfig
flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.32.0  netmask 255.255.255.255  broadcast 0.0.0.0
        inet6 fe80::344b:13ff:fecb:1e2d  prefixlen 64  scopeid 0x20<link>
        ether 36:4b:13:cb:1e:2d  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 27 overruns 0  carrier 0  collisions 0

node2：

[root@node2 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz

`创建k8s工作目录`
[root@node2 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node2 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/

[root@node2 ~]# vim flannel.sh
#!/bin/bash

ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"}

cat <<EOF >/opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \
-etcd-cafile=/opt/etcd/ssl/ca.pem \
-etcd-certfile=/opt/etcd/ssl/server.pem \
-etcd-keyfile=/opt/etcd/ssl/server-key.pem"

EOF

cat <<EOF >/usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

EOF

systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld

`开启flannel网络功能`
[root@node2 ~]# bash flannel.sh https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.

`配置docker连接flannel`
[root@node2 ~]# vim /usr/lib/systemd/system/docker.service
#service段落做如下改动
9 [Service]
10 Type=notify
11 # the default is not to use systemd for cgroups because the delegate issues s    till
12 # exists and systemd currently does not support the cgroup feature set requir    ed
13 # for containers run by docker
14 EnvironmentFile=/run/flannel/subnet.env      #在13下添加此行
15 ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run    /containerd/containerd.sock     #15行中在-H前添加$DOCKER_NETWORK_OPTIONS
16 ExecReload=/bin/kill -s HUP $MAINPID
17 TimeoutSec=0
18 RestartSec=2
19 Restart=always
#修改完成后按Esc退出插入模式，输入:wq保存退出

[root@node2 ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.40.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=172.17.40.1/24 --ip-masq=false --mtu=1450"
#此处bip指定启动时的子网

`重启docker服务`
[root@node2 ~]# systemctl daemon-reload
[root@node2 ~]# systemctl restart docker

`查看flannel网络`
[root@node2 ~]# ifconfig
flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.40.0  netmask 255.255.255.255  broadcast 0.0.0.0
        inet6 fe80::cc6f:baff:fe89:3b93  prefixlen 64  scopeid 0x20<link>
        ether ce:6f:ba:89:3b:93  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 240 overruns 0  carrier 0  collisions 0

测试ping通对方docker0网卡 证明flannel起到路由作用

node1：

[root@node1 ~]# docker run -it centos:7 /bin/bash
Unable to find image 'centos:7' locally
7: Pulling from library/centos
ab5ef0e58194: Pull complete
Digest: sha256:4a701376d03f6b39b8c2a8f4a8e499441b0d567f9ab9d58e4991de4472fb813c
Status: Downloaded newer image for centos:7
#此时会自动进入容器

[root@3cdebf0d2bb8 /]# yum install net-tools -y
[root@3cdebf0d2bb8 /]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.32.2  netmask 255.255.255.0  broadcast 172.17.32.255
        ether 02:42:ac:11:20:02  txqueuelen 0  (Ethernet)
        RX packets 16774  bytes 13938639 (13.2 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7361  bytes 400658 (391.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
#eth0网卡为172.17.32.2

`测试ping通`
[root@3cdebf0d2bb8 /]# ping 172.17.40.2
PING 172.17.40.2 (172.17.40.2) 56(84) bytes of data.
64 bytes from 172.17.40.2: icmp_seq=1 ttl=62 time=0.279 ms
64 bytes from 172.17.40.2: icmp_seq=2 ttl=62 time=1.07 ms
64 bytes from 172.17.40.2: icmp_seq=3 ttl=62 time=0.397 ms
^C
--- 172.17.40.2 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3002ms
rtt min/avg/max/mdev = 0.279/0.610/1.075/0.307 ms
#此时可以ping通

node2：

[root@node2 ~]# docker run -it centos:7 /bin/bash
Unable to find image 'centos:7' locally
7: Pulling from library/centos
ab5ef0e58194: Pull complete
Digest: sha256:4a701376d03f6b39b8c2a8f4a8e499441b0d567f9ab9d58e4991de4472fb813c
Status: Downloaded newer image for centos:7
#此时会自动进入容器

[root@036c7eb6be88 /]# yum install net-tools -y
[root@036c7eb6be88 /]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.40.2  netmask 255.255.255.0  broadcast 172.17.40.255
        ether 02:42:ac:11:28:02  txqueuelen 0  (Ethernet)
        RX packets 16859  bytes 13953367 (13.3 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7528  bytes 409881 (400.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
#eth0网卡为172.17.40.2

`测试ping通`
[root@036c7eb6be88 /]# ping 172.17.32.2
PING 172.17.32.2 (172.17.32.2) 56(84) bytes of data.
64 bytes from 172.17.32.2: icmp_seq=1 ttl=62 time=0.411 ms
64 bytes from 172.17.32.2: icmp_seq=2 ttl=62 time=0.699 ms
64 bytes from 172.17.32.2: icmp_seq=3 ttl=62 time=0.684 ms
^C
--- 172.17.32.2 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 5004ms
rtt min/avg/max/mdev = 0.411/0.744/1.299/0.269 ms
#此时可以ping通

部署master组件

`在master上操作，api-server生成证书,需要先上传master.zip到master节点上`
[root@master k8s]# unzip master.zip
Archive:  master.zip
  inflating: apiserver.sh
  inflating: controller-manager.sh
  inflating: scheduler.sh
[root@master k8s]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p

`创建apiserver自签证书目录`
[root@master k8s]# mkdir k8s-cert
[root@master k8s]# cd k8s-cert/
[root@master k8s-cert]# ls      #需要上传k8s-cert.sh到此目录下
k8s-cert.sh

`建立ca证书`
[root@master k8s-cert]# cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

[root@master k8s-cert]# cat > ca-csr.json <<EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Nanjing",
            "ST": "Nanjing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF
`证书签名（生成ca.pem ca-key.pem）`
[root@master k8s-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2020/02/05 10:15:09 [INFO] generating a new CA key and certificate from CSR
2020/02/05 10:15:09 [INFO] generate received request
2020/02/05 10:15:09 [INFO] received CSR
2020/02/05 10:15:09 [INFO] generating key: rsa-2048
2020/02/05 10:15:09 [INFO] encoded CSR
2020/02/05 10:15:09 [INFO] signed certificate with serial number 154087341948227448402053985122760482002707860296

`建立apiserver证书`
[root@master k8s-cert]# cat > server-csr.json <<EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.18.128",     #master1（centos 7-3）
      "192.168.18.132",     #master2（mini-1）
      "192.168.18.100",     #vip（自行设定负载均衡用）
      "192.168.18.147",     #lb （mini-2）
      "192.168.18.133",     #lb （mini-3）
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "NanJing",
            "ST": "NanJing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF
`证书签名（生成server.pem server-key.pem）`
[root@master k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
2020/02/05 11:43:47 [INFO] generate received request
2020/02/05 11:43:47 [INFO] received CSR
2020/02/05 11:43:47 [INFO] generating key: rsa-2048
2020/02/05 11:43:47 [INFO] encoded CSR
2020/02/05 11:43:47 [INFO] signed certificate with serial number 359419453323981371004691797080289162934778938507
2020/02/05 11:43:47 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

`建立admin证书`
[root@master k8s-cert]# cat > admin-csr.json <<EOF
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "NanJing",
      "ST": "NanJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF
`证书签名（生成admin.pem admin-key.epm）`
[root@master k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
2020/02/05 11:46:04 [INFO] generate received request
2020/02/05 11:46:04 [INFO] received CSR
2020/02/05 11:46:04 [INFO] generating key: rsa-2048
2020/02/05 11:46:04 [INFO] encoded CSR
2020/02/05 11:46:04 [INFO] signed certificate with serial number 361885975538105795426233467824041437549564573114
2020/02/05 11:46:04 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

`建立kube-proxy证书`
[root@master k8s-cert]# cat > kube-proxy-csr.json <<EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "NanJing",
      "ST": "NanJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF
`证书签名（生成kube-proxy.pem kube-proxy-key.pem）`
[root@master k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
2020/02/05 11:47:55 [INFO] generate received request
2020/02/05 11:47:55 [INFO] received CSR
2020/02/05 11:47:55 [INFO] generating key: rsa-2048
2020/02/05 11:47:56 [INFO] encoded CSR
2020/02/05 11:47:56 [INFO] signed certificate with serial number 34747850270017663665747172643822215922289240826
2020/02/05 11:47:56 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

生成k8s证书

[root@master k8s-cert]# bash k8s-cert.sh
2020/02/05 11:50:08 [INFO] generating a new CA key and certificate from CSR
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:08 [INFO] encoded CSR
2020/02/05 11:50:08 [INFO] signed certificate with serial number 473883155883308900863805079252124099771123043047
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:08 [INFO] encoded CSR
2020/02/05 11:50:08 [INFO] signed certificate with serial number 66483817738746309793417718868470334151539533925
2020/02/05 11:50:08 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:08 [INFO] encoded CSR
2020/02/05 11:50:08 [INFO] signed certificate with serial number 245658866069109639278946985587603475325871008240
2020/02/05 11:50:08 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:09 [INFO] encoded CSR
2020/02/05 11:50:09 [INFO] signed certificate with serial number 696729766024974987873474865496562197315198733463
2020/02/05 11:50:09 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

[root@master k8s-cert]# ls *pem
admin-key.pem  ca-key.pem  kube-proxy-key.pem  server-key.pem
admin.pem      ca.pem      kube-proxy.pem      server.pem

[root@master k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/
[root@master k8s-cert]# cd ..

`解压kubernetes压缩包`
[root@master k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@master k8s]# cd /root/k8s/kubernetes/server/bin
`复制关键命令文件`
[root@master bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/
[root@master k8s]# cd /root/k8s

`随机生成序列号`
[root@master k8s]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '
9b3186df3dc799376ad43b6fe0108571

[root@master k8s]# vim /opt/kubernetes/cfg/token.csv
9b3186df3dc799376ad43b6fe0108571,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#序列号，用户名，id，角色

`二进制文件，token，证书都准备好，开启apiserver`
[root@master k8s]# bash apiserver.sh 192.168.18.128 https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.

`检查进程是否启动成功`
[root@master k8s]# ps aux | grep kube
root       7034  0.6  1.2  46672 23460 ?        Ssl  12:23   0:33 /opt/kubernetes/bin/kube-scheduler --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect
root       7104  0.0  2.0 108508 38552 ?        Ssl  12:24   0:02 /opt/kubernetes/bin/kube-controller-manager --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect=true --address=127.0.0.1 --service-cluster-ip-range=10.0.0.0/24 --cluster-name=kubernetes --cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem --cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem --root-ca-file=/opt/kubernetes/ssl/ca.pem --service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem --experimental-cluster-signing-duration=87600h0m0s
root       8146 77.5 14.7 363196 275780 ?       Ssl  13:44   0:05 /opt/kubernetes/bin/kube-apiserver --logtostderr=true --v=4 --etcd-servers=https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379 --bind-address=192.168.18.128 --secure-port=6443 --advertise-address=192.168.18.128 --allow-privileged=true --service-cluster-ip-range=10.0.0.0/24 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction --authorization-mode=RBAC,Node --kubelet-https=true --enable-bootstrap-token-auth --token-auth-file=/opt/kubernetes/cfg/token.csv --service-node-port-range=30000-50000 --tls-cert-file=/opt/kubernetes/ssl/server.pem --tls-private-key-file=/opt/kubernetes/ssl/server-key.pem --client-ca-file=/opt/kubernetes/ssl/ca.pem --service-account-key-file=/opt/kubernetes/ssl/ca-key.pem --etcd-cafile=/opt/etcd/ssl/ca.pem --etcd-certfile=/opt/etcd/ssl/server.pem --etcd-keyfile=/opt/etcd/ssl/server-key.pem
root       8154  0.0  0.0 112676   980 pts/1    R+   13:44   0:00 grep --color=auto kube

`查看配置文件`
[root@master k8s]# cat /opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379 \
--bind-address=192.168.18.128 \
--secure-port=6443 \
--advertise-address=192.168.18.128 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--kubelet-https=true \
--enable-bootstrap-token-auth \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/opt/kubernetes/ssl/server.pem  \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"

`监听的https端口`
[root@master k8s]# netstat -ntap | grep 6443
tcp        0      0 192.168.18.128:6443     0.0.0.0:*               LISTEN      8146/kube-apiserver
tcp        0      0 192.168.18.128:6443     192.168.18.128:56724    ESTABLISHED 8146/kube-apiserver
tcp        0      0 192.168.18.128:56724    192.168.18.128:6443     ESTABLISHED 8146/kube-apiserver
[root@master k8s]# netstat -ntap | grep 8080
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      8146/kube-apiserver
......以下省略多行

`启动scheduler服务`
[root@master k8s]# ./scheduler.sh 127.0.0.1
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-scheduler.service to /usr/lib/systemd/system/kube-scheduler.service.
[root@master k8s]# ps aux | grep ku
postfix    6212  0.0  0.0  91732  1364 ?        S    11:29   0:00 pickup -l -t unix -u
root       7034  1.1  1.0  45360 20332 ?        Ssl  12:23   0:00 /opt/kubernetes/bin/kube-scheduler --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect
root       7042  0.0  0.0 112676   980 pts/1    R+   12:23   0:00 grep --color=auto ku
[root@master k8s]# chmod +x controller-manager.sh

`启动controller-manager`
[root@master k8s]# ./controller-manager.sh 127.0.0.1
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.

`查看master 节点状态`
[root@master k8s]#  /opt/kubernetes/bin/kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok
scheduler            Healthy   ok
etcd-1               Healthy   {"health":"true"}
etcd-0               Healthy   {"health":"true"}
etcd-2               Healthy   {"health":"true"}

node节点部署

第一步：master上操作

`把 kubelet、kube-proxy拷贝到node节点上去`
[root@master k8s]# cd kubernetes/server/bin/
[root@master bin]# scp kubelet kube-proxy root@192.168.18.148:/opt/kubernetes/bin/
root@192.168.18.148's password:
kubelet                                                                100%  168MB  81.1MB/s   00:02
kube-proxy                                                             100%   48MB  77.6MB/s   00:00
[root@master bin]# scp kubelet kube-proxy root@192.168.18.145:/opt/kubernetes/bin/
root@192.168.18.145's password:
kubelet                                                                100%  168MB  86.8MB/s   00:01
kube-proxy                                                             100%   48MB  90.4MB/s   00:00

第二步：node1节点操作（上传node.zip到/root目录下再解压）

[root@node1 ~]# ls
anaconda-ks.cfg  flannel-v0.10.0-linux-amd64.tar.gz  node.zip   公共  视频  文档  音乐
flannel.sh       initial-setup-ks.cfg                README.md  模板  图片  下载  桌面
[root@node1 ~]# unzip node.zip
Archive:  node.zip
  inflating: proxy.sh
  inflating: kubelet.sh

第三步：再回到master上操作

[root@master bin]# cd /root/k8s/
[root@master k8s]# mkdir kubeconfig
[root@master k8s]# cd kubeconfig/

`上传kubeconfig.sh脚本到此目录中，并对其进行重命名`
[root@master kubeconfig]# ls
kubeconfig.sh
[root@master kubeconfig]# mv kubeconfig.sh kubeconfig

[root@master kubeconfig]# vim kubeconfig
#删除前9行，之前生成令牌的时候已经执行过

# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
  --token=9b3186df3dc799376ad43b6fe0108571 \    #令牌中的序列号需要做更改是我们之前生成的令牌
  --kubeconfig=bootstrap.kubeconfig
#修改完成后按Esc退出插入模式，输入:wq保存退出

----如何获取序列号----
[root@master kubeconfig]# cat /opt/kubernetes/cfg/token.csv
9b3186df3dc799376ad43b6fe0108571,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#我们需要用到其中的序列号"9b3186df3dc799376ad43b6fe0108571"每个人的序列号是不同的
---------------------

`设置环境变量（可以写入到/etc/profile中）`
[root@master kubeconfig]# vim /etc/profile
#按大写字母G到最末行，按小写字母o在下行插入
export PATH=$PATH:/opt/kubernetes/bin/
#修改完成后按Esc退出插入模式，输入:wq保存退出
[root@master kubeconfig]# source /etc/profile

[root@master kubeconfig]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok
controller-manager   Healthy   ok
etcd-2               Healthy   {"health":"true"}
etcd-1               Healthy   {"health":"true"}
etcd-0               Healthy   {"health":"true"}
[root@master kubeconfig]# kubectl get node
No resources found.
#此时还没有节点被添加

第四步：生成配置文件

[root@master kubeconfig]# bash kubeconfig 192.168.18.128 /root/k8s/k8s-cert/
Cluster "kubernetes" set.
User "kubelet-bootstrap" set.
Context "default" created.
Switched to context "default".
Cluster "kubernetes" set.
User "kube-proxy" set.
Context "default" created.
Switched to context "default".

[root@master kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig

`拷贝配置文件到两个node节点`
[root@master kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.18.148:/opt/kubernetes/cfg/
root@192.168.18.148's password:
bootstrap.kubeconfig                                                              100% 2168     2.2MB/s   00:00
kube-proxy.kubeconfig                                                             100% 6270     3.5MB/s   00:00
[root@master kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.18.145:/opt/kubernetes/cfg/
root@192.168.18.145's password:
bootstrap.kubeconfig                                                              100% 2168     3.1MB/s   00:00
kube-proxy.kubeconfig                                                             100% 6270     7.9MB/s   00:00

`创建bootstrap角色赋予权限用于连接apiserver请求签名（关键步骤）`
[root@master kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created

第五步：在node01节点上操作

[root@node1 ~]# bash kubelet.sh 192.168.18.148
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.

`检查kubelet服务启动`
[root@node1 ~]# ps aux | grep kube
root       8807  0.0  0.8 300512 16260 ?        Ssl  09:45   0:05 /opt/kubernetes/bin/flanneld --ip-masq --etcd-endpoints=https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.145:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem
root      35040  0.4  2.1 369632 40832 ?        Ssl  14:53   0:00 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=192.168.18.148 --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig --bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig --config=/opt/kubernetes/cfg/kubelet.config --cert-dir=/opt/kubernetes/ssl --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0
root      35078  0.0  0.0 112676   984 pts/1    S+   14:54   0:00 grep --color=auto kube

[root@node1 ~]# systemctl status kubelet.service
● kubelet.service - Kubernetes Kubelet
   Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
   Active: active (running) since 三 2020-02-05 14:54:45 CST; 21s ago
#状态为running运行中

第六步：master上检查节点的请求

`node1会自动寻找apiserver去进行申请证书，我们就可以检查到node01节点的请求`
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-ZZnDyPkUICga9NeuZF-M8IHTmpekEurXtbHXOyHZbDg   18s   kubelet-bootstrap   Pending
#此时状态为Pending等待集群给该节点颁发证书

`继续查看证书状态`
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-ZZnDyPkUICga9NeuZF-M8IHTmpekEurXtbHXOyHZbDg   3m59s   kubelet-bootstrap   Approved,Issued
#此时状态为Approved,Issued已经被允许加入群集

`查看群集节点，成功加入node1节点`
[root@master kubeconfig]# kubectl get node
NAME             STATUS   ROLES    AGE     VERSION
192.168.18.148   Ready    <none>   6m54s   v1.12.3

`在node1节点操作，启动proxy服务`
[root@node1 ~]# bash proxy.sh 192.168.195.148
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.

[root@node1 ~]# systemctl status kube-proxy.service
● kube-proxy.service - Kubernetes Proxy
   Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
   Active: active (running) since 四 2020-02-06 11:11:56 CST; 20s ago
#状态为running运行中

第七步：node2节点部署

`在node01节点操作把现成的/opt/kubernetes目录复制到node2节点进行修改即可`
[root@node1 ~]# scp -r /opt/kubernetes/ root@192.168.18.145:/opt/
The authenticity of host '192.168.18.145 (192.168.18.145)' can't be established.
ECDSA key fingerprint is SHA256:mTT+FEtzAu4X3D5srZlz93S3gye8MzbqVZFDzfJd4Gk.
ECDSA key fingerprint is MD5:fa:5a:88:23:49:60:9b:b8:7e:4b:14:4b:3f:cd:96:a0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.18.145' (ECDSA) to the list of known hosts.
root@192.168.18.145's password:
flanneld                                                  100%  238   572.7KB/s   00:00
bootstrap.kubeconfig                                      100% 2168     4.9MB/s   00:00
kube-proxy.kubeconfig                                     100% 6270    12.0MB/s   00:00
kubelet                                                   100%  378   642.2KB/s   00:00
kubelet.config                                            100%  268   565.0KB/s   00:00
kubelet.kubeconfig                                        100% 2297     3.5MB/s   00:00
kube-proxy                                                100%  191   396.6KB/s   00:00
mk-docker-opts.sh                                         100% 2139     3.2MB/s   00:00
scp: /opt//kubernetes/bin/flanneld: Text file busy
kubelet                                                   100%  168MB  96.9MB/s   00:01
kube-proxy                                                100%   48MB 108.9MB/s   00:00
kubelet.crt                                               100% 2193     2.4MB/s   00:00
kubelet.key                                               100% 1675     2.5MB/s   00:00
kubelet-client-2020-02-06-11-03-32.pem                    100% 1277     2.2MB/s   00:00
kubelet-client-current.pem                                100% 1277   684.2KB/s   00:00

`把node1中的kubelet，kube-proxy的service文件拷贝到node2中`
[root@node1 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.18.145:/usr/lib/systemd/system/
root@192.168.18.145's password:
kubelet.service                                           100%  264   291.3KB/s   00:00
kube-proxy.service                                        100%  231   407.8KB/s   00:00

`到node2上操作，进行修改：首先删除复制过来的证书，等会node2会自行申请证书`
[root@node2 ~]# cd /opt/kubernetes/ssl/
[root@node2 ssl]# rm -rf *

`修改配置文件kubelet  kubelet.config kube-proxy（三个配置文件）`
[root@node2 ssl]# cd ../cfg/
[root@node2 cfg]# vim kubelet
4 --hostname-override=192.168.18.145 \      #第4行，主机名改为node2节点的IP地址
#修改完成后按Esc退出插入模式，输入:wq保存退出

[root@node2 cfg]# vim kubelet.config
4 address: 192.168.18.145       #第4行，地址改为node2节点的IP地址
#修改完成后按Esc退出插入模式，输入:wq保存退出

[root@node2 cfg]# vim kube-proxy
4 --hostname-override=192.168.195.145       #第4行，改为node2节点的IP地址
#修改完成后按Esc退出插入模式，输入:wq保存退出

`启动服务`
[root@node2 cfg]# systemctl start kubelet.service
[root@node2 cfg]# systemctl enable kubelet.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@node2 cfg]# systemctl start kube-proxy.service
[root@node2 cfg]# systemctl enable kube-proxy.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.

第八步：回到master上查看node2节点请求

[root@master k8s]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh5w8WJA   99s   kubelet-bootstrap   Pending
#此时出现新的授权许可加入群集

[root@master k8s]# kubectl certificate approve node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh5w8WJA
certificatesigningrequest.certificates.k8s.io/node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh5w8WJA approved

`查看群集中的节点`
[root@master k8s]# kubectl get node
NAME             STATUS   ROLES    AGE   VERSION
192.168.18.145   Ready    <none>   28s   v1.12.3
192.168.18.148   Ready    <none>   26m   v1.12.3
#此时两个节点都已加入到群集中