K8s多節點部署詳細步驟,附UI界面的搭建

時間 2020-02-10

標籤 k8s 節點部署詳細步驟界面搭建简体版

原文原文鏈接

K8s多節點部署

須要準備的環境:

6臺centos7設備:
192.168.1.11 master01
192.168.1.12 node1
192.168.1.13 node2
192.168.1.14 master02
192.168.1.15 lb1
192.168.1.16 lb2
VIP：192.168.1.100html

實驗步驟:

1：自籤ETCD證書
2：ETCD部署
3：Node安裝docker
4：Flannel部署（先寫入子網到etcd）
---------master----------
5：自籤APIServer證書
6：部署APIServer組件（token，csv）
7：部署controller-manager（指定apiserver證書）和scheduler組件
----------node----------
8：生成kubeconfig（bootstrap，kubeconfig和kube-proxy.kubeconfig）
9：部署kubelet組件
10：部署kube-proxy組件
----------加入羣集----------
11：kubectl get csr && kubectl certificate approve 容許辦法證書，加入羣集
12：添加一個node節點
13：查看kubectl get node 節點node

具體步驟

一.etcd羣集搭建

1. 在master01 上操做進行etcd證書自籤

[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/
`定義CA證書`
cat > ca-config.json <<EOF
{
  "signing":{
    "default":{
      "expiry":"87600h"
    },
    "profiles":{
      "www":{
        "expiry":"87600h",
        "usages":[
          "signing",
          "key encipherment",
          "server auth",
          "client auth"
        ]
      }
    }
  }
}
EOF

`實現證書籤名`
cat > ca-csr.json <<EOF
{
    "CN":"etcd CA",
    "key":{
        "algo":"rsa",
        "size":2048
    },
    "names":[
        {
            "C":"CN",
            "L":"Nanjing",
            "ST":"Nanjing"
        }
    ]
}
EOF

`生產證書，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三個節點之間的通訊驗證`
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.1.11",
    "192.168.1.12",
    "192.168.1.13"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "NanJing",
            "ST": "NanJing"
        }
    ]
}
EOF

`生成ETCD證書 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").

上傳如下三個壓縮包到/root/k8s目錄：linux

[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/

`證書拷貝`
[root@master k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/

`進入卡住狀態等待其餘節點加入`
[root@master k8s]# bash etcd.sh etcd01 192.168.1.11 etcd02=https://192.168.12.148:2380,etcd03=https://192.168.1.13:2380
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service

2.從新打開一個master01 終端

[root@master ~]# ps -ef | grep etcd
root       3479   1780  0 11:48 pts/0    00:00:00 bash etcd.sh etcd01 192.168.1.11 etcd02=https://192.168.1.12:2380,etcd03=https://192.168.1.13:2380
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://192.168.1.11:2380 
--listen-client-urls=https://192.168.1.11:2379,http://127.0.0.1:2379 
--advertise-client-urls=https://192.168.1.11:2379 
--initial-advertise-peer-urls=https://192.168.1.11:2380 
--initial-cluster=etcd01=https://192.168.1.11:2380,etcd02=https://192.168.1.12:2380,etcd03=https://192.168.1.13:2380 
--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

拷貝證書去2個node節點`
[root@master k8s]# scp -r /opt/etcd/ root@192.168.1.12:/opt/
root@192.168.1.12'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@192.168.1.13:/opt/
root@192.168.1.13'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

複製etcd的啓動腳本到2個node節點
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.1.12:/usr/lib/systemd/system/
root@192.168.1.12's password:
etcd.service                                               100%  923   283.4KB/s   00:00
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.1.13:/usr/lib/systemd/system/
root@192.168.1.13's password:
etcd.service                                               100%  923   347.7KB/s   00:00

3.分別取2個node節點修改etcd的配置文件並啓動etcd服務

node1
[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://192.168.1.12:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.12:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.12:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.12:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.1.11:2380,etcd02=https://192.168.1.12:2380,etcd03=https://192.168.1.13:2380"
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
#狀態爲Active

node2
[root@node1 ~]# systemctl stop firewalld.service
[root@node1 ~]# setenforce 0
[root@node1 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.1.13:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.13:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.13:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.13:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.1.11:2380,etcd02=https://192.168.1.12:2380,etcd03=https://192.168.1.13:2380"
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
#狀態爲Active

4.在master01上驗證羣集信息

[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://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379" cluster-health
member 9104d301e3b6da41 is healthy: got healthy result from https://192.168.1.11:2379
member 92947d71c72a884e is healthy: got healthy result from https://192.168.1.12:2379
member b2a6d67e1bc8054b is healthy: got healthy result from https://192.168.1.13:2379
cluster is healthy

二.在2個node節點上部署docker

`安裝依賴包`
[root@node1 ~]# yum install yum-utils device-mapper-persistent-data lvm2 -y

`設置阿里雲鏡像源`
[root@node1 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

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

`啓動Docker並設置爲開機自啓動`
[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.

`檢查相關進程開啓狀況`
[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

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

#網絡優化部分
echo 'net.ipv4.ip_forward=1' > /etc/sysctl.cnf
sysctl -p

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

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

三.安裝flannel組件

1.在master服務器中寫入分配的子網段到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://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

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

查看寫入的信息
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379" get /coreos.com/network/config

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

將flannel的軟件包拷貝到全部node節點（只須要部署在node節點便可）
[root@master etcd-cert]# cd ../
[root@master k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.1.12:/root
root@192.168.1.12'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@192.168.1.13:/root
root@192.168.1.13's password:
flannel-v0.10.0-linux-amd64.tar.gz             100% 9479KB  69.5MB/s   00:00

2.分別在2個node節點進行配置flannel

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

`建立k8s工做目錄`
[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

`開啓flannel網絡功能`
[root@node1 ~]# bash flannel.sh https://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.

`配置docker鏈接flannel`
[root@node1 ~]# vim /usr/lib/systemd/system/docker.service
#service段落作以下改動
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
#修改完成後按Esc退出插入模式，輸入: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"
#此處bip指定啓動時的子網

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

`查看flannel網絡`
[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

四.部署master組件

1.在master上操做，api-server生成證書,須要先上傳master.zip到master節點上

[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

`建立apiserver自簽證書目錄`
[root@master k8s]# mkdir k8s-cert
[root@master k8s]# cd k8s-cert/
[root@master k8s-cert]# ls      #須要上傳k8s-cert.sh到此目錄下
k8s-cert.sh

`創建ca證書`
[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
`證書籤名（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

`創建apiserver證書`
[root@master k8s-cert]# cat > server-csr.json <<EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.1.11",     #master1
      "192.168.1.14",     #master2
      "192.168.1.100",     #vip
      "192.168.1.15",     #lb 
      "192.168.1.16",     #lb 
      "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
`證書籤名（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").

`創建admin證書`
[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
`證書籤名（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").

`創建kube-proxy證書`
[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
`證書籤名（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").

2.生成apiserver證書,並開啓scheduler和controller-manager組件

[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 ..

`解壓kubernetes壓縮包`
[root@master k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@master k8s]# cd /root/k8s/kubernetes/server/bin
`複製關鍵命令文件`
[root@master bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/
[root@master k8s]# cd /root/k8s

`隨機生成序列號`
[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"
#序列號，用戶名，id，角色

`二進制文件，token，證書都準備好，開啓apiserver`
[root@master k8s]# bash apiserver.sh 192.168.1.11 https://192.168.1.11:2379,https://192.168.1.12:2379,https://192.168.1.13:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.

`檢查進程是否啓動成功`
[root@master k8s]# ps aux | grep 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://192.168.1.11:2379,https://192.168.18.148:2379,https://192.168.18.145:2379 \
--bind-address=192.168.1.11 \
--secure-port=6443 \
--advertise-address=192.168.1.11 \
--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"

`監聽的https端口`
[root@master k8s]# netstat -ntap | grep 6443

`啓動scheduler服務`
[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

`啓動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 節點狀態`
[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"}

五.部署node節點組件

1.在master01上把 kubelet、kube-proxy命令文件拷貝到node節點上去

[root@master k8s]# cd kubernetes/server/bin/
[root@master bin]# scp kubelet kube-proxy root@192.168.1.12:/opt/kubernetes/bin/
root@192.168.1.12'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@192.168.1.13:/opt/kubernetes/bin/
root@192.168.1.13's password:
kubelet                                                                100%  168MB  86.8MB/s   00:01
kube-proxy                                                             100%   48MB  90.4MB/s   00:00

2.在node1上解壓文件

[root@node1 ~]# ls
anaconda-ks.cfg  flannel-v0.10.0-linux-amd64.tar.gz  node.zip   公共  視頻  文檔  音樂
flannel.sh       initial-setup-ks.cfg                README.md  模板  圖片  下載  桌面
[root@node1 ~]# unzip node.zip
Archive:  node.zip
  inflating: proxy.sh
  inflating: kubelet.sh

3.在master01上操做

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

`上傳kubeconfig.sh腳本到此目錄中，並對其進行重命名`
[root@master kubeconfig]# ls
kubeconfig.sh
[root@master kubeconfig]# mv kubeconfig.sh kubeconfig

[root@master kubeconfig]# vim kubeconfig
#刪除前9行，以前生成令牌的時候已經執行過

# 設置客戶端認證參數
kubectl config set-credentials kubelet-bootstrap \
  --token=9b3186df3dc799376ad43b6fe0108571 \    #令牌中的序列號須要作更改是咱們以前生成的令牌
  --kubeconfig=bootstrap.kubeconfig
#修改完成後按Esc退出插入模式，輸入:wq保存退出

----如何獲取序列號----
[root@master kubeconfig]# cat /opt/kubernetes/cfg/token.csv
9b3186df3dc799376ad43b6fe0108571,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#咱們須要用到其中的序列號"9b3186df3dc799376ad43b6fe0108571"每一個人的序列號是不一樣的
---------------------

`設置環境變量（能夠寫入到/etc/profile中）`
[root@master kubeconfig]# vim /etc/profile
#按大寫字母G到最末行，按小寫字母o在下行插入
export PATH=$PATH:/opt/kubernetes/bin/
#修改完成後按Esc退出插入模式，輸入: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.
#此時尚未節點被添加

[root@master kubeconfig]# bash kubeconfig 192.168.1.11 /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

`拷貝配置文件到兩個node節點`
[root@master kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.1.12:/opt/kubernetes/cfg/
root@192.168.1.12'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@192.168.1.13:/opt/kubernetes/cfg/
root@192.168.1.13's password:
bootstrap.kubeconfig                                                              100% 2168     3.1MB/s   00:00
kube-proxy.kubeconfig                                                             100% 6270     7.9MB/s   00:00

`建立bootstrap角色賦予權限用於鏈接apiserver請求籤名（關鍵步驟）`
[root@master kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created

3.在node01節點上操做

[root@node1 ~]# bash kubelet.sh 192.168.1.12
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.

檢查kubelet服務啓動
[root@node1 ~]# ps aux | grep 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
#狀態爲running運行中

4.在master01上驗證node1的證書請求

node1會自動尋找apiserver去進行申請證書，咱們就能夠檢查到node01節點的請求
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-ZZnDyPkUICga9NeuZF-M8IHTmpekEurXtbHXOyHZbDg   18s   kubelet-bootstrap   Pending
#此時狀態爲Pending等待集羣給該節點頒發證書

`繼續查看證書狀態`
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-ZZnDyPkUICga9NeuZF-M8IHTmpekEurXtbHXOyHZbDg   3m59s   kubelet-bootstrap   Approved,Issued
#此時狀態爲Approved,Issued已經被容許加入羣集

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

5.在node1節點操做，啓動proxy服務

[root@node1 ~]# bash proxy.sh 192.168.1.12
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
#狀態爲running運行中

6.把node1中的/opt/kubernetes目錄複製到node2節點,而且kubelet，kube-proxy的service文件拷貝到node2中

[root@node1 ~]# scp -r /opt/kubernetes/ root@192.168.1.13:/opt/
[root@node1 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.1.13:/usr/lib/systemd/system/
root@192.168.1.13's password:
kubelet.service                                           100%  264   291.3KB/s   00:00
kube-proxy.service                                        100%  231   407.8KB/s   00:00

7.到node2上操做，進行修改：首先刪除複製過來的證書，等會node2會自行申請證書

[root@node2 ~]# cd /opt/kubernetes/ssl/
[root@node2 ssl]# rm -rf *

`修改配置文件kubelet  kubelet.config kube-proxy（三個配置文件）`
[root@node2 ssl]# cd ../cfg/
[root@node2 cfg]# vim kubelet
4 --hostname-override=192.168.1.13\      #第4行，主機名改成node2節點的IP地址
#修改完成後按Esc退出插入模式，輸入:wq保存退出

[root@node2 cfg]# vim kubelet.config
4 address: 192.168.1.13       #第4行，地址改成node2節點的IP地址
#修改完成後按Esc退出插入模式，輸入:wq保存退出

[root@node2 cfg]# vim kube-proxy
4 --hostname-override=192.168.1.13       #第4行，改成node2節點的IP地址
#修改完成後按Esc退出插入模式，輸入:wq保存退出

`啓動服務`
[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節點請求
[root@master k8s]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh4w8WJA   99s   kubelet-bootstrap   Pending
#此時出現新的受權許可加入羣集

[root@master k8s]# kubectl certificate approve node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh4w8WJA
certificatesigningrequest.certificates.k8s.io/node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh4w8WJA approved

8.在master01上查看羣集中的節點

[root@master k8s]# kubectl get node
NAME             STATUS   ROLES    AGE   VERSION
192.168.1.12   Ready    <none>   28s   v1.12.3
192.168.1.13   Ready    <none>   26m   v1.12.3
#此時兩個節點都已加入到羣集中

六.部署第2臺master

1.在master上操做

在master1上操做，複製kubernetes目錄到master2
[root@master1 k8s]# scp -r /opt/kubernetes/ root@192.168.1.14:/opt

複製master1中的三個組件啓動腳本kube-apiserver.service，kube-controller-manager.service，kube-scheduler.service到master2

[root@master1 k8s]# scp /usr/lib/systemd/system/{kube-apiserver,kube-controller-manager,kube-scheduler}.service root@192.168.1.14:/usr/lib/systemd/system/

2.master2上操做，修改配置文件kube-apiserver中的IP

[root@master2 ~]# cd /opt/kubernetes/cfg/
[root@master2 cfg]# ls
kube-apiserver  kube-controller-manager  kube-scheduler  token.csv
[root@master2 cfg]# vim kube-apiserver
5 --bind-address=192.168.1.14 \
7 --advertise-address=192.168.1.14 \
#第5和7行IP地址須要改成master2的地址
#修改完成後按Esc退出插入模式，輸入:wq保存退出

3.在master01上操做拷貝已有的etcd證書給master2使用

[root@master1 k8s]# scp -r /opt/etcd/ root@192.168.1.14:/opt/
root@192.168.1.14's password:
etcd                                                      100%  516   535.5KB/s   00:00
etcd                                                      100%   18MB  90.6MB/s   00:00
etcdctl                                                   100%   15MB  80.5MB/s   00:00
ca-key.pem                                                100% 1675     1.4MB/s   00:00
ca.pem                                                    100% 1265   411.6KB/s   00:00
server-key.pem                                            100% 1679     2.0MB/s   00:00
server.pem                                                100% 1338   429.6KB/s   00:00

4. 在master02上啓動三個組件服務

[root@master2 cfg]# systemctl start kube-apiserver.service
[root@master2 cfg]# systemctl enable kube-apiserver.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.
[root@master2 cfg]# systemctl status kube-apiserver.service
● kube-apiserver.service - Kubernetes API Server
   Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled; vendor preset: disabled)
   Active: active (running) since 五 2020-02-07 09:16:57 CST; 56min ago

[root@master2 cfg]# systemctl start kube-controller-manager.service
[root@master2 cfg]# systemctl enable kube-controller-manager.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.
[root@master2 cfg]# systemctl status kube-controller-manager.service
● kube-controller-manager.service - Kubernetes Controller Manager
   Loaded: loaded (/usr/lib/systemd/system/kube-controller-manager.service; enabled; vendor preset: disabled)
   Active: active (running) since 五 2020-02-07 09:17:02 CST; 57min ago

[root@master2 cfg]# systemctl start kube-scheduler.service
[root@master2 cfg]# systemctl enable kube-scheduler.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-scheduler.service to /usr/lib/systemd/system/kube-scheduler.service.
[root@master2 cfg]# systemctl status kube-scheduler.service
● kube-scheduler.service - Kubernetes Scheduler
   Loaded: loaded (/usr/lib/systemd/system/kube-scheduler.service; enabled; vendor preset: disabled)
   Active: active (running) since 五 2020-02-07 09:17:07 CST; 58min ago

5.修改系統環境變量,並查看節點狀態,來驗證master02運行正常

[root@master2 cfg]# vim /etc/profile
#末尾添加
export PATH=$PATH:/opt/kubernetes/bin/
[root@master2 cfg]# source /etc/profile
[root@master2 cfg]# kubectl get node
NAME             STATUS   ROLES    AGE   VERSION
192.168.1.12   Ready    <none>   21h   v1.12.3
192.168.1.13   Ready    <none>   22h   v1.12.3
#此時能夠看到node1和node2的加入狀況

七.負載均衡部署

1.上傳keepalived.conf和nginx.sh兩個文件到lb1和lb2的root目錄下

`lb1`
[root@lb1 ~]# ls
anaconda-ks.cfg       keepalived.conf  公共  視頻  文檔  音樂
initial-setup-ks.cfg  nginx.sh         模板  圖片  下載  桌面

`lb2`
[root@lb2 ~]# ls
anaconda-ks.cfg       keepalived.conf  公共  視頻  文檔  音樂
initial-setup-ks.cfg  nginx.sh         模板  圖片  下載  桌面

2.lb1（192.168.1.15）操做

[root@lb1 ~]# systemctl stop firewalld.service
[root@lb1 ~]# setenforce 0

[root@lb1 ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
#修改完成後按Esc退出插入模式，輸入:wq保存退出
`從新加載yum倉庫`
[root@lb1 ~]# yum list
`安裝nginx服務`
[root@lb1 ~]# yum install nginx -y

[root@lb1 ~]# vim /etc/nginx/nginx.conf
#在12行下插入如下內容
stream {

   log_format  main  '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
    access_log  /var/log/nginx/k8s-access.log  main;

    upstream k8s-apiserver {
        server 192.168.1.11:6443;     #此處爲master1的ip地址
        server 192.168.1.12:6443;     #此處爲master2的ip地址
    }
    server {
                listen 6443;
                proxy_pass k8s-apiserver;
    }
    }
#修改完成後按Esc退出插入模式，輸入:wq保存退出
`檢測語法`
[root@lb1 ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

[root@lb1 ~]# cd /usr/share/nginx/html/
[root@lb1 html]# ls
50x.html  index.html
[root@lb1 html]# vim index.html
14 <h1>Welcome to mater nginx!</h1>     #14行中添加master以做區分
#修改完成後按Esc退出插入模式，輸入:wq保存退出
`啓動服務`
[root@lb2 ~]# systemctl start nginx
瀏覽器驗證訪問，輸入192.168.18.147，能夠訪問master的nginx主頁
在這裏插入圖片描述

部署keepalived服務
[root@lb1 html]# yum install keepalived -y
`修改配置文件`
[root@lb1 html]# cd ~
[root@lb1 ~]# cp keepalived.conf /etc/keepalived/keepalived.conf
cp：是否覆蓋"/etc/keepalived/keepalived.conf"？ yes
#用咱們以前上傳的keepalived.conf配置文件，覆蓋安裝完成後原有的配置文件

[root@lb1 ~]# vim /etc/keepalived/keepalived.conf
18     script "/etc/nginx/check_nginx.sh"       #18行目錄改成/etc/nginx/，腳本後寫
23     interface ens33      #eth0改成ens33，此處的網卡名稱能夠使用ifconfig命令查詢
24     virtual_router_id 51     #vrrp路由ID實例，每一個實例是惟一的
25     priority 100             #優先級，備服務器設置90
31     virtual_ipaddress {
32         192.168.1.100/24    #vip地址改成以前設定好的192.168.18.100
#38行如下刪除
#修改完成後按Esc退出插入模式，輸入:wq保存退出

`寫腳本`
[root@lb1 ~]# vim /etc/nginx/check_nginx.sh     
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")    #統計數量

if [ "$count" -eq 0 ];then
    systemctl stop keepalived
fi
#匹配爲0，關閉keepalived服務
#寫入完成後按Esc退出插入模式，輸入:wq保存退出
[root@lb1 ~]# chmod +x /etc/nginx/check_nginx.sh
[root@lb1 ~]# ls /etc/nginx/check_nginx.sh
/etc/nginx/check_nginx.sh       #此時腳本爲可執行狀態，綠色
[root@lb1 ~]# systemctl start keepalived

[root@lb1 ~]# ip a
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:24:63:be brd ff:ff:ff:ff:ff:ff
    inet 192.168.18.147/24 brd 192.168.18.255 scope global dynamic ens33
       valid_lft 1370sec preferred_lft 1370sec
    inet `192.168.1.100/24` scope global secondary ens33       #此時漂移地址在lb1中
       valid_lft forever preferred_lft forever
    inet6 fe80::1cb1:b734:7f72:576f/64 scope link
       valid_lft forever preferred_lft forever
    inet6 fe80::578f:4368:6a2c:80d7/64 scope link tentative dadfailed
       valid_lft forever preferred_lft forever
    inet6 fe80::6a0c:e6a0:7978:3543/64 scope link tentative dadfailed
       valid_lft forever preferred_lft forever

3.lb2（192.168.1.16）操做

[root@lb2 ~]# systemctl stop firewalld.service
[root@lb2 ~]# setenforce 0

[root@lb2 ~]# vim /etc/yum.repos.d/nginx.repo
[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/centos/7/$basearch/
gpgcheck=0
#修改完成後按Esc退出插入模式，輸入:wq保存退出
`從新加載yum倉庫`
[root@lb2 ~]# yum list
`安裝nginx服務`
[root@lb2 ~]# yum install nginx -y

[root@lb2 ~]# vim /etc/nginx/nginx.conf
#在12行下插入如下內容
stream {

   log_format  main  '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
    access_log  /var/log/nginx/k8s-access.log  main;

    upstream k8s-apiserver {
        server 192.168.18.128:6443;     #此處爲master1的ip地址
        server 192.168.18.132:6443;     #此處爲master2的ip地址
    }
    server {
                listen 6443;
                proxy_pass k8s-apiserver;
    }
    }
#修改完成後按Esc退出插入模式，輸入:wq保存退出
`檢測語法`
[root@lb2 ~]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

[root@lb2 ~]# vim /usr/share/nginx/html/index.html
14 <h1>Welcome to backup nginx!</h1>    #14行中添加backup以做區分
#修改完成後按Esc退出插入模式，輸入:wq保存退出
`啓動服務`
[root@lb2 ~]# systemctl start nginx
瀏覽器驗證訪問，輸入192.168.18.133，能夠訪問master的nginx主頁
在這裏插入圖片描述

部署keepalived服務
[root@lb2 ~]# yum install keepalived -y
`修改配置文件`
[root@lb2 ~]# cp keepalived.conf /etc/keepalived/keepalived.conf
cp：是否覆蓋"/etc/keepalived/keepalived.conf"？ yes
#用咱們以前上傳的keepalived.conf配置文件，覆蓋安裝完成後原有的配置文件

[root@lb2 ~]# vim /etc/keepalived/keepalived.conf
18     script "/etc/nginx/check_nginx.sh"       #18行目錄改成/etc/nginx/，腳本後寫
22     state BACKUP     #22行角色MASTER改成BACKUP
23     interface ens33  #eth0改成ens33
24     virtual_router_id 51     #vrrp路由ID實例，每一個實例是惟一的
25     priority 90      #優先級，備服務器爲90
31     virtual_ipaddress {
32         192.168.1.100/24    #vip地址改成以前設定好的192.168.18.100
#38行如下刪除
#修改完成後按Esc退出插入模式，輸入:wq保存退出

`寫腳本`
[root@lb2 ~]# vim /etc/nginx/check_nginx.sh     
count=$(ps -ef |grep nginx |egrep -cv "grep|$$")    #統計數量

if [ "$count" -eq 0 ];then
    systemctl stop keepalived
fi
#匹配爲0，關閉keepalived服務
#寫入完成後按Esc退出插入模式，輸入:wq保存退出
[root@lb2 ~]# chmod +x /etc/nginx/check_nginx.sh
[root@lb2 ~]# ls /etc/nginx/check_nginx.sh
/etc/nginx/check_nginx.sh       #此時腳本爲可執行狀態，綠色

[root@lb2 ~]# systemctl start keepalived
[root@lb2 ~]# ip a
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:9d:b7:83 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.16/24 brd 192.168.1.255 scope global dynamic ens33
       valid_lft 958sec preferred_lft 958sec
    inet6 fe80::578f:4368:6a2c:80d7/64 scope link
       valid_lft forever preferred_lft forever
    inet6 fe80::6a0c:e6a0:7978:3543/64 scope link tentative dadfailed
       valid_lft forever preferred_lft forever
#此時沒有192.168.18.100，由於地址在lb1（master）上

此時K8s 多節點部署已經所有完成

補充: k8sUI界面的搭建

1.在master01上操做

建立dashborad工做目錄
[root@localhost k8s]# mkdir dashboard
拷貝官方的文件
https://github.com/kubernetes/kubernetes/tree/master/cluster/addons/dashboard

[root@localhost dashboard]# kubectl create -f dashboard-rbac.yaml 
role.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard-minimal created
[root@localhost dashboard]# kubectl create -f dashboard-secret.yaml 
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-key-holder created
[root@localhost dashboard]# kubectl create -f dashboard-configmap.yaml 
configmap/kubernetes-dashboard-settings created
[root@localhost dashboard]# kubectl create -f dashboard-controller.yaml 
serviceaccount/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
[root@localhost dashboard]# kubectl create -f dashboard-service.yaml 
service/kubernetes-dashboard created
//完成後查看建立在指定的kube-system命名空間下
[root@localhost dashboard]# kubectl get pods -n kube-system
NAME                                    READY   STATUS              RESTARTS   AGE
kubernetes-dashboard-65f974f565-m9gm8   0/1     ContainerCreating   0          88s
//查看如何訪問
[root@localhost dashboard]# kubectl get pods,svc -n kube-system
NAME                                        READY   STATUS    RESTARTS   AGE
pod/kubernetes-dashboard-65f974f565-m9gm8   1/1     Running   0          2m49s

NAME                           TYPE       CLUSTER-IP   EXTERNAL-IP   PORT(S)         AGE
service/kubernetes-dashboard   NodePort   10.0.0.243   <none>        443:30001/TCP   2m24s
//訪問nodeIP就能夠訪問
https://192.168.1.12:30001/

2.注意:谷歌瀏覽器沒法訪問的問題

[root@localhost dashboard]# vim dashboard-cert.sh
cat > dashboard-csr.json <<EOF
{
   "CN": "Dashboard",
   "hosts": [],
   "key": {
       "algo": "rsa",
       "size": 2048
   },
   "names": [
       {
           "C": "CN",
           "L": "BeiJing",
           "ST": "BeiJing"
       }
   ]
}
EOF

K8S_CA=$1
cfssl gencert -ca=$K8S_CA/ca.pem -ca-key=$K8S_CA/ca-key.pem -config=$K8S_CA/ca-config.json -profile=kubernetes dashboard-csr.json | cfssljson -bare dashboard
kubectl delete secret kubernetes-dashboard-certs -n kube-system
kubectl create secret generic kubernetes-dashboard-certs --from-file=./ -n kube-system

#dashboard-controller.yaml 增長證書兩行，而後apply
#     args:
#        # PLATFORM-SPECIFIC ARGS HERE
#        - --auto-generate-certificates
#        - --tls-key-file=dashboard-key.pem
#        - --tls-cert-file=dashboard.pem

[root@localhost dashboard]# bash dashboard-cert.sh /root/k8s/k8s-cert/
2020/02/05 15:29:08 [INFO] generate received request
2020/02/05 15:29:08 [INFO] received CSR
2020/02/05 15:29:08 [INFO] generating key: rsa-2048
2020/02/05 15:29:09 [INFO] encoded CSR
2020/02/05 15:29:09 [INFO] signed certificate with serial number 150066859036029062260457207091479364937405390263
2020/02/05 15:29:09 [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").
secret "kubernetes-dashboard-certs" deleted
secret/kubernetes-dashboard-certs created
[root@localhost dashboard]# vim dashboard-controller.yaml
args:
          # PLATFORM-SPECIFIC ARGS HERE
          - --auto-generate-certificates
          - --tls-key-file=dashboard-key.pem
          - --tls-cert-file=dashboard.pem
//從新部署
[root@localhost dashboard]# kubectl apply -f dashboard-controller.yaml 
Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
serviceaccount/kubernetes-dashboard configured
Warning: kubectl apply should be used on resource created by either kubectl create --save-config or kubectl apply
deployment.apps/kubernetes-dashboard configured

3.從新訪問,此時須要令牌

4.生成令牌

[root@localhost dashboard]# kubectl create -f k8s-admin.yaml 
serviceaccount/dashboard-admin created
clusterrolebinding.rbac.authorization.k8s.io/dashboard-admin created
//保存
[root@localhost dashboard]# kubectl get secret -n kube-system
NAME                               TYPE                                  DATA   AGE
dashboard-admin-token-qctfr        kubernetes.io/service-account-token   3      65s
default-token-mmvcg                kubernetes.io/service-account-token   3      7d15h
kubernetes-dashboard-certs         Opaque                                11     10m
kubernetes-dashboard-key-holder    Opaque                                2      63m
kubernetes-dashboard-token-nsc84   kubernetes.io/service-account-token   3      62m
//查看令牌
[root@localhost dashboard]# kubectl describe secret dashboard-admin-token-qctfr -n kube-system
Name:         dashboard-admin-token-qctfr
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: dashboard-admin
              kubernetes.io/service-account.uid: 73f19313-47ea-11ea-895a-000c297a15fb

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1359 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.v4YBoyES2etex6yeMPGfl7OT4U9Ogp-84p6cmx3HohiIS7sSTaCqjb3VIvyrVtjSdlT66ZMRzO3MUgj1HsPxgEzOo9q6xXOCBb429m9Qy-VK2JxuwGVD2dIhcMQkm6nf1Da5ZpcYFs8SNT-djAjZNB_tmMY_Pjao4DBnD2t_JXZUkCUNW_O2D0mUFQP2beE_NE2ZSEtEvmesB8vU2cayTm_94xfvtNjfmGrPwtkdH0iy8sH-T0apepJ7wnZNTGuKOsOJf76tU31qF4E5XRXIt-F2Jmv9pEOFuahSBSaEGwwzXlXOVMSaRF9cBFxn-0iXRh0Aq0K21HdPHW1b4-ZQwA

5.複製生成的token,輸入到瀏覽器中,就能夠看到UI界面了

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