基本环境配置

主机信息，服务器IP地址不能设置为dhcp，要配置静态IP。

VIP（虚拟IP）不要和公司内网IP重复，首先去ping一下，不通才可用。VIP需要和主机在同一个局域网内！

192.168.1.107 k8s-master01 # 2C2G 20G
192.168.1.108 k8s-master02 # 2C2G 20G
192.168.1.109 k8s-master03 # 2C2G 20G
192.168.1.236 k8s-master-lb # VIP虚IP不占用机器资源 # 如果不是高可用集群，该IP为Master01的IP
192.168.1.110 k8s-node01 # 2C2G 20G
192.168.1.111 k8s-node02 # 2C2G 20G

K8s Service网段：10.96.0.0/12

K8s Pod网段：172.16.0.0/12

系统环境：

[root@master01 ~]#  cat /etc/redhat-release 
CentOS Linux release 7.9.2009 (Core)
[root@master01 ~]#

虚拟机环境：

k8s 如何安装grafana k8s 安装教程_docker

k8s 如何安装grafana k8s 安装教程_json_02

配置所有节点hosts文件

[root@master01 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.107 k8s-master01
192.168.1.108 k8s-master02
192.168.1.109 k8s-master03
192.168.1.236 k8s-master-lb
192.168.1.110 k8s-node01
192.168.1.111 k8s-node02
[root@master01 ~]#

CentOS7安装yum源如下：

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

必备工具安装

yum install wget jq psmisc vim net-tools telnet yum-utils device-mapper-persistent-data lvm2 git -y

所有节点关闭firewalld、dnsmasq、selinux

systemctl disable --now firewalld
systemctl disable --now dnsmasq

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

所有节点关闭swap分区，fstab注释swap

swapoff -a && sysctl -w vm.swappiness=0
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab

所有节点同步时间

安装ntpdate

rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm
yum install ntpdate -y

所有节点同步时间。时间同步配置如下：

ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' > /etc/timezone
ntpdate time2.aliyun.com
# 加入到crontab
crontab -e
*/5 * * * * ntpdate time2.aliyun.com

所有节点配置limit：

ulimit -SHn 65535

vim /etc/security/limits.conf
#末尾添加如下内容
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited

Master01节点免密钥登录其他节点，安装过程中生成配置文件和证书均在Master01上操作，集群管理也在Master01上操作，阿里云或者AWS上需要单独一台kubectl服务器。密钥配置如下：

[root@k8s-master01 ~]# ssh-keygen -t rsa

Master01配置免密码登录其他节点

for i in k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done

Master01下载安装文件

git config --global --unset http.proxy
git config --global --unset https.proxy
git clone https://github.com/dotbalo/k8s-ha-install.git

所有节点升级系统并重启，此处升级没有升级内核，升级内核可参考之前的内容一套教程搞定k8s安装到实战 。

yum update -y --exclude=kernel* --skip-broken && reboot #CentOS需要升级，CentOS8可以按需升级系统

基本组件安装

本节主要安装的是集群中用到各种组件，比如Docker-ce、Kubernetes各组件等。

Docker安装

所有节点安装Docker-ce 19.03

yum install docker-ce-19.03.* -y

温馨提示：

由于新版kubelet建议使用systemd，所以可以把docker的CgroupDriver改成systemd

mkdir /etc/docker
cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts":["native.cgroupdriver=systemd"]
}
EOF

所有节点设置开机自启动Docker：

systemctl daemon-reload && systemctl enable --now docker

K8s及etcd安装

Master01下载kubernetes安装包

wget https://dl.k8s.io/v1.20.0/kubernetes-server-linux-amd64.tar.gz

下载etcd安装包

wget https://github.com/etcd-io/etcd/releases/download/v3.4.13/etcd-v3.4.13-linux-amd64.tar.gz

解压kubernetes安装文件

tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}

解压etcd安装文件

tar -zxvf etcd-v3.4.13-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.4.13-linux-amd64/etcd{,ctl}

版本查看

[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.20.0
[root@k8s-master01 ~]# 
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.4.13
API version: 3.4
[root@k8s-master01 ~]#

将组件发送到其他节点

MasterNodes='k8s-master02 k8s-master03'
WorkNodes='k8s-node01 k8s-node02'
for NODE in $MasterNodes;do echo $NODE;scp /usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/;scp /usr/local/bin/etcd* $NODE:/usr/local/bin;done
for NODE in $WorkNodes;do scp /usr/local/bin/kube{let,-proxy} $NODE:/usr/local/bin;done

所有节点创建/opt/cni/bin目录

mkdir -p /opt/cni/bin

切换分支

git branch -a
git checkout manual-installation-v1.20.x

生成证书

二进制安装最关键步骤，一步错误全盘皆输，一定要注意每个步骤都要是正确的

Master01下载生成证书工具

wget "https://pkg.cfssl.org/R1.2/cfssl_linux-amd64" -O /usr/local/bin/cfssl
wget "https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64" -O /usr/local/bin/cfssljson
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson

所有Master节点创建etcd证书目录

mkdir /etc/etcd/ssl -p

所有节点创建kubernetes相关目录

mkdir -p /etc/kubernetes/pki

Master01节点生成etcd证书

生成证书的CSR文件：证书签名请求文件，配置了一些域名、公司、单位

cd /root/k8s-ha-install/pki

# 生成CA证书和CA证书的key
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /etc/etcd/ssl/etcd-ca

# 曾在这里因为hostname问题导致etcd服务无法启动，后删除无用的ip地址，并修改节点域名为IP地址解决
cfssl gencert -ca=/etc/etcd/ssl/etcd-ca.pem -ca-key=/etc/etcd/ssl/etcd-ca-key.pem -config=ca-config.json -hostname=127.0.0.1,192.168.1.107,192.168.1.108,192.168.1.109 -profile=kubernetes etcd-csr.json|cfssljson -bare /etc/etcd/ssl/etcd

将证书复制到其他节点

MasterNodes='k8s-master02 k8s-master03'
WorkNodes='k8s-node01 k8s-node02'
for NODE in $MasterNodes;do
ssh $NODE "mkdir -p /etc/etcd/ssl"
for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem;do
scp /etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}
done
done

Master01生成kubernetes证书

cfssl gencert -initca ca-csr.json | cfssljson -bare /etc/kubernetes/pki/ca

# 10.96.0是k8s service的网段，如果说需要更改k8s service网段，那就需要更改10.96.0.1
cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -hostname=10.96.0.1,192.168.1.236,127.0.0.1,kubernetes,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,192.168.1.107,192.168.1.108,192.168.1.109 -profile=kubernetes apiserver-csr.json|cfssljson -bare /etc/kubernetes/pki/apiserver

cfssl gencert -initca front-proxy-ca-csr.json|cfssljson -bare /etc/kubernetes/pki/front-proxy-ca

# 生成apiserver的聚合证书。Requestheader-client-xxx request-allowed-xxx:aggregator
cfssl gencert -ca=/etc/kubernetes/pki/front-proxy-ca.pem -ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem -config=ca-config.json -profile=kubernetes front-proxy-client-csr.json|cfssljson -bare /etc/kubernetes/pki/front-proxy-client

# 生成controller-manage的证书
cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -profile=kubernetes manager-csr.json|cfssljson -bare /etc/kubernetes/pki/controller-manager

# set-cluster：设置一个集群项
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.236:8443 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

# 设置一个环境项，一个上下文
kubectl config set-context system:kube-controller-manager@kubernetes --cluster=kubernetes --user=system:kube-controller-manager --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

# set-credentials 设置一个用户项
kubectl config set-credentials system:kube-controller-manager --client-certificate=/etc/kubernetes/pki/controller-manager.pem --client-key=/etc/kubernetes/pki/controller-manager-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

#使用某个环境当做默认环境
kubectl config use-context system:kube-controller-manager@kubernetes --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig

cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -profile=kubernetes scheduler-csr.json | cfssljson -bare /etc/kubernetes/pki/scheduler

kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.236:8443 --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

kubectl config set-credentials system:kube-scheduler --client-certificate=/etc/kubernetes/pki/scheduler.pem --client-key=/etc/kubernetes/pki/scheduler-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

kubectl config set-context system:kube-scheduler@kubernetes --cluster=kubernetes --user=system:kube-scheduler --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

kubectl config use-context system:kube-scheduler@kubernetes --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare /etc/kubernetes/pki/admin

kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.236:8443 --kubeconfig=/etc/kubernetes/admin.kubeconfig

kubectl config set-credentials kubernetes-admin --client-certificate=/etc/kubernetes/pki/admin.pem --client-key=/etc/kubernetes/pki/admin-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/admin.kubeconfig

kubectl config set-context kubernetes-admin@kubernetes --cluster=kubernetes --user=kubernetes-admin --kubeconfig=/etc/kubernetes/admin.kubeconfig

kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig

创建ServiceAccount Key

openssl genrsa -out /etc/kubernetes/pki/sa.key 2048

openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub

for NODE in k8s-master02 k8s-master03;do
for FILE in $(ls /etc/kubernetes/pki | grep -v etcd);do
scp /etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE};
done;
for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig;do
scp /etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE};
done;
done
# 确认生成的文件有23个
[root@k8s-master01 pki]# ls /etc/kubernetes/pki | wc -l
23
[root@k8s-master01 pki]#

Kubernetes系统组件配置

etcd配置

etcd配置大致相同，注意修改每个Master节点的etcd配置的主机名和IP地址

Master01

vim /etc/etcd/etcd.config.yml
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.107:2380'
listen-client-urls: 'https://192.168.1.107:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.107:2380'
advertise-client-urls: 'https://192.168.0.107:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.107:2380,k8s-master02=https://192.168.1.108:2380,k8s-master03=https://192.168.1.109:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 0
client-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: 'etc/kubernetes/pki/etcd/etcd-key.pem'
  client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
peer-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  peer-client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false

Master02

vim /etc/etcd/etcd.config.yml
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.108:2380'
listen-client-urls: 'https://192.168.1.108:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.108:2380'
advertise-client-urls: 'https://192.168.1.108:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.107:2380,k8s-master02=https://192.168.1.108:2380,k8s-master03=https://192.168.1.109:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 0
client-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
peer-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  peer-client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false

Master03

vim /etc/etcd/etcd.config.yml
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.1.109:2380'
listen-client-urls: 'https://192.168.1.109:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.1.109:2380'
advertise-client-urls: 'https://192.168.1.109:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://192.168.1.107:2380,k8s-master02=https://192.168.1.108:2380,k8s-master03=https://192.168.1.109:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 0
client-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
peer-transport-security:
  cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
  key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
  peer-client-cert-auth: true
  trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
  auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false

创建Service

所有Master节点创建etcd service并启动

vi /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target

[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
Alias=etcd3.service

所有Master节点创建etcd的证书目录

mkdir /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd
systemctl daemon-reload
systemctl enable --now etcd

查看etcd状态

[root@k8s-master01 etcd]# export ETCDCTL_API=3
[root@k8s-master01 pki]# etcdctl --endpoints="192.168.1.109:2379,192.168.1.108:2379,192.168.1.107:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|      ENDPOINT      |        ID        | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 192.168.1.109:2379 | 40ebe70dffb00505 |  3.4.13 |   20 kB |     false |      false |        14 |          9 |                  9 |        |
| 192.168.1.108:2379 | 4087302bf9046cf1 |  3.4.13 |   20 kB |     false |      false |        14 |          9 |                  9 |        |
| 192.168.1.107:2379 | 8af8195104313994 |  3.4.13 |   20 kB |      true |      false |        14 |          9 |                  9 |        |
+--------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
[root@k8s-master01 pki]#

高可用配置

高可用配置（注意：如果不是高可用集群，haproxy和keepalived无需安装）

如果在云上安装也无需执行此章节的步骤，可以直接使用云上的lb，比如阿里云slb，腾讯云elb等

所有Master节点安装keepalived和haproxy

yum install keepalived haproxy -y

所有Master配置HAProxy，配置一样

vi /etc/haproxy/haproxy.cfg
global
  maxconn 2000
  ulimit-n 16384
  log 127.0.0.1 local0 err
  stats timeout 30s

defaults
  log global
  mode http
  option httplog
  timeout connect 5000
  timeout client 50000
  timeout server 50000
  timeout http-request 15s
  timeout http-keep-alive 15s
  
frontend k8s-master
  bind 0.0.0.0:8443
  bind 127.0.0.1:8443
  mode tcp
  option tcplog
  tcp-request inspect-delay 5s
  default_backend k8s-master
   
backend k8s-master
  mode tcp
  option tcplog
  option tcp-check
  balance roundrobin
  default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
  server k8s-master01 192.168.1.107:6443 check
  server k8s-master02 192.168.1.108:6443 check
  server k8s-master03 192.168.1.109:6443 check

Master01 keepalived

所有Master节点配置KeepAlived，配置不一样，注意区分[root@k8s-master01 pki]# vim
/etc/keepalived/keepalived.conf，注意每个节点的IP和网卡（interface参数）

!Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
    interval 5
    weight -5
    fall 2
    rise 1
}
vrrp_instance VI_1 {
    state MASTER
    interface eno16777736
    mcast_src_ip 192.168.1.107
    virtual_router_id 51
    priority 101
    nopreempt
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.1.236
    }
    track_script {
        chk_apiserver
    }
}

Master02 keepalived

!Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
    interval 5
    weight -5
    fall 2
    rise 1
}
vrrp_instance VI_1 {
    state BACKUP
    interface eno16777736
    mcast_src_ip 192.168.1.108
    virtual_router_id 51
    priority 100
    nopreempt
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.1.236
    }
    track_script {
        chk_apiserver
    }
}

Master03 keepalived

!Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_apiserver {
    script "/etc/keepalived/check_apiserver.sh"
    interval 5
    weight -5
    fall 2
    rise 1
}
vrrp_instance VI_1 {
    state BACKUP
    interface eno16777736
    mcast_src_ip 192.168.1.109
    virtual_router_id 51
    priority 100
    nopreempt
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.1.236
    }
    track_script {
        chk_apiserver
    }
}

健康检查配置

所有master节点

vi /etc/keepalived/check_apiserver.sh
#!/bin/bash

err=0
for k in $(seq 1 3)
do
    check_code=$(pgrep haproxy)
    if [[ $check_code == "" ]]; then
        err=$(expr $err +1)
        sleep 1
        continue
    else
        err=0
        break
    fi
done

if [[ $err != "0" ]]; then
    echo "systemctl stop keepalived"
    /usr/bin/systemctl stop keepalived
    exit 1
else
    exit 0
fi
chmod +x /etc/keepalived/check_apiserver.sh

所有master节点启动haproxy和keepalived

systemctl daemon-reload
systemctl enable --now haproxy
systemctl enable --now keepalived

VIP测试

[root@k8s-master01 pki]# ping 192.168.1.236
PING 192.168.1.236 (192.168.1.236) 56(84) bytes of data.
64 bytes from 192.168.1.236: icmp_seq=1 ttl=64 time=0.033 ms
64 bytes from 192.168.1.236: icmp_seq=2 ttl=64 time=0.081 ms
64 bytes from 192.168.1.236: icmp_seq=3 ttl=64 time=0.077 ms
^C
--- 192.168.1.236 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2042ms
rtt min/avg/max/mdev = 0.033/0.063/0.081/0.023 ms
[root@k8s-master01 pki]#

重要：如果安装了keepalived和haproxy， 需要测试keepalived是否是正常的

[root@k8s-master01 pki]# telnet 192.168.1.236 8443
Trying 192.168.1.236...
Connected to 192.168.1.236.
Escape character is '^]'.
Connection closed by foreign host.
[root@k8s-master01 pki]#

如果ping不通且telnet没有出现']'，则认为VIP不可以，不可再继续往下执行，需要排查keepalived的问题，比如防火墙和selinux，haproxy和keepalived的状态，监听端口灯

所有节点查看防火墙状态必须为disable和inactive：systemctl status firewalld

所有节点查看selinux状态，必须为disable：getenforce

master节点查看haproxy和keepalived状态：systemctl status keepalived haproxy

Kubernetes系统组件配置（续）

Apiserver

所有节点创建相关目录

mkdir -p /etc/kubernetes/manifest/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes

所有Master节点创建kube-apiserver service，# 注意，如果不是高可用集群，192.168.1.236改为master01的地址

Master01配置

注意本文档使用的k8s service网段为10.96.0.0/12，该网段不能和宿主机的网段、Pod网段重复，请按需修改

vi /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
      --v=2 \
      --logtostderr=true \
      --allow-privileged=true \
      --bind-address=0.0.0.0 \
      --secure-port=6443 \
      --insecure-port=0 \
      --advertise-address=192.168.1.107 \
      --service-cluster-ip-range=10.96.0.0/12 \
      --service-node-port-range=30000-32767 \
      --etcd-servers=https://192.168.1.107:2379,https://192.168.1.108:2379,https://192.168.1.109:2379 \
      --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
      --etcd-certfile=/etc/etcd/ssl/etcd.pem \
      --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
      --client-ca-file=/etc/kubernetes/pki/ca.pem \
      --tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
      --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
      --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
      --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
      --service-account-key-file=/etc/kubernetes/pki/sa.pub \
      --service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
      --service-account-issuer=https://kubernetes.default.svc.cluster.local \
      --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
      --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
      --authorization-mode=Node,RBAC \
      --enable-bootstrap-token-auth=true \
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
      --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
      --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
      --requestheader-allowed-names=aggregator \
      --requestheader-extra-headers-prefix=X-Remote-Group \
      --requestheader-username-headers=X-Remote-User
      # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

Master02配置

vi /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
      --v=2 \
      --logtostderr=true \
      --allow-privileged=true \
      --bind-address=0.0.0.0 \
      --secure-port=6443 \
      --insecure-port=0 \
      --advertise-address=192.168.1.108 \
      --service-cluster-ip-range=10.96.0.0/12 \
      --service-node-port-range=30000-32767 \
      --etcd-servers=https://192.168.1.107:2379,https://192.168.1.108:2379,https://192.168.1.109:2379 \
      --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
      --etcd-certfile=/etc/etcd/ssl/etcd.pem \
      --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
      --client-ca-file=/etc/kubernetes/pki/ca.pem \
      --tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
      --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
      --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
      --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
      --service-account-key-file=/etc/kubernetes/pki/sa.pub \
      --service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
      --service-account-issuer=https://kubernetes.default.svc.cluster.local \
      --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
      --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
      --authorization-mode=Node,RBAC \
      --enable-bootstrap-token-auth=true \
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
      --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
      --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
      --requestheader-allowed-names=aggregator \
      --requestheader-group-headers=X-Remote-Group \
      --requestheader-extra-headers-prefix=X-Remote-Extra- \
      --requestheader-username-headers=X-Remote-User
      # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

Master03配置

vi /usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-apiserver \
      --v=2 \
      --logtostderr=true \
      --allow-privileged=true \
      --bind-address=0.0.0.0 \
      --secure-port=6443 \
      --insecure-port=0 \
      --advertise-address=192.168.1.109 \
      --service-cluster-ip-range=10.96.0.0/12 \
      --service-node-port-range=30000-32767 \
      --etcd-servers=https://192.168.1.107:2379,https://192.168.1.108:2379,https://192.168.1.109:2379 \
      --etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \
      --etcd-certfile=/etc/etcd/ssl/etcd.pem \
      --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
      --client-ca-file=/etc/kubernetes/pki/ca.pem \
      --tls-cert-file=/etc/kubernetes/pki/apiserver.pem \
      --tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \
      --kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \
      --kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \
      --service-account-key-file=/etc/kubernetes/pki/sa.pub \
      --service-account-signing-key-file=/etc/kubernetes/pki/sa.key \
      --service-account-issuer=https://kubernetes.default.svc.cluster.local \
      --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
      --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \
      --authorization-mode=Node,RBAC \
      --enable-bootstrap-token-auth=true \
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
      --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \
      --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \
      --requestheader-allowed-names=aggregator \
      --requestheader-group-headers=X-Remote-Group \
      --requestheader-extra-headers-prefix=X-Remote-Extra- \
      --requestheader-username-headers=X-Remote-User
      # --token-auth-file=/etc/kubernetes/token.csv

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

启动apiserver

所有Master节点开启kube-apiserver

systemctl daemon-reload && systemctl enable --now kube-apiserver

检测kube-server状态

[root@k8s-master01 pki]# systemctl status kube-apiserver
● kube-apiserver.service - Kubernetes API Server
   Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2022-06-21 21:15:19 CST; 11s ago
     Docs: https://github.com/kubernetes/kubernetes
 Main PID: 4604 (kube-apiserver)
    Tasks: 8
   Memory: 276.4M
   CGroup: /system.slice/kube-apiserver.service
           └─4604 /usr/local/bin/kube-apiserver --v=2 --logtostderr=true --allow-privileged=true --bind-address=0.0.0.0 --secure-port=6443 --insecure-port=0 --advertise-address=192.168.1.107 --serv...

Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: I0621 21:15:25.359623    4604 healthz.go:244] poststarthook/rbac/bootstrap-roles check failed: readyz
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: I0621 21:15:25.457019    4604 healthz.go:244] poststarthook/rbac/bootstrap-roles check failed: readyz
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: I0621 21:15:25.557168    4604 healthz.go:244] poststarthook/rbac/bootstrap-roles check failed: readyz
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: W0621 21:15:25.714977    4604 lease.go:233] Resetting endpoints for master service "kubernetes" to [192.168.1.107 192.168.1.108 192.168.1.109]
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: I0621 21:15:25.718182    4604 controller.go:606] quota admission added evaluator for: endpoints
Jun 21 21:15:25 k8s-master-lb kube-apiserver[4604]: I0621 21:15:25.726940    4604 controller.go:606] quota admission added evaluator for: endpointslices.discovery.k8s.io
[root@k8s-master01 pki]#

ControllerManager

所有Master节点配置kube-controller-manager service

vi /usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-controller-manager \
      --v=2 \
      --logtostderr=true \
      --address=127.0.0.1 \
      --root-ca-file=/etc/kubernetes/pki/ca.pem \
      --cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \
      --cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \
      --service-account-private-key-file=/etc/kubernetes/pki/sa.key \
      --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \
      --leader-elect=true \
      --use-service-account-credentials=true \
      --node-monitor-grace-period=40s \
      --node-monitor-period=5s \
      --pod-eviction-timeout=2m0s \
      --controllers=*,bootstrapsigner,tokencleaner \
      --allocate-node-cidrs=true \
      --cluster-cidr=172.16.0.0/12 \
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
      --node-cidr-mask-size=24

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target

所有Master节点启动kube-controller-manager

systemctl daemon-reload
systemctl enable --now kube-controller-manager

查看启动状态

[root@k8s-master01 pki]# systemctl status kube-controller-manager
● 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 Tue 2022-06-21 21:16:16 CST; 11s ago
     Docs: https://github.com/kubernetes/kubernetes
 Main PID: 4721 (kube-controller)
    Tasks: 5
   Memory: 27.4M
   CGroup: /system.slice/kube-controller-manager.service
           └─4721 /usr/local/bin/kube-controller-manager --v=2 --logtostderr=true --address=127.0.0.1 --root-ca-file=/etc/kubernetes/pki/ca.pem --cluster-signing-cert-file=/etc/kubernetes/pki/ca.pe...

Jun 21 21:16:20 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:20.705608    4721 shared_informer.go:240] Waiting for caches to sync for ClusterRoleAggregator
Jun 21 21:16:20 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:20.855590    4721 controllermanager.go:554] Started "pv-protection"
Jun 21 21:16:20 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:20.855687    4721 controllermanager.go:539] Starting "replicaset"
Jun 21 21:16:20 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:20.855787    4721 pv_protection_controller.go:83] Starting PV protection controller
Jun 21 21:16:20 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:20.855807    4721 shared_informer.go:240] Waiting for caches to sync for PV protection
Jun 21 21:16:21 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:21.015750    4721 controllermanager.go:554] Started "replicaset"
Jun 21 21:16:21 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:21.015803    4721 controllermanager.go:539] Starting "nodeipam"
Jun 21 21:16:21 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:21.015894    4721 replica_set.go:182] Starting replicaset controller
Jun 21 21:16:21 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:21.015908    4721 shared_informer.go:240] Waiting for caches to sync for ReplicaSet
Jun 21 21:16:21 k8s-master-lb kube-controller-manager[4721]: I0621 21:16:21.055523    4721 node_ipam_controller.go:91] Sending events to api server.
[root@k8s-master01 pki]#

Scheduler

所有Master节点配置kube-scheduler service

vi /usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/local/bin/kube-scheduler \
      --v=2 \
      --logtostderr=true \
      --address=127.0.0.1 \
      --leader-elect=true \
      --kubeconfig=/etc/kubernetes/scheduler.kubeconfig

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target
systemctl daemon-reload
systemctl enable --now kube-scheduler

TLS Bootstrapping配置

在Master01创建bootstrap

#注意，如果不是高可用集群，192.168.1.236:8443改为master01的地址，8443改为apiserver的端口，默认是6443

cd /root/k8s-ha-install/bootstrap
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.236:8443 --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-credentials tls-bootstrap-token-user --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config set-context tls-bootstrap-token-user@kubernetes --cluster=kubernetes --user=tls-bootstrap-token-user --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
kubectl config use-context tls-bootstrap-token-user@kubernetes --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig

注意：如果要修改boostrap.secret.yaml的token-id和token-secret，需要保证下图红圈内内的字符串一致的，并且位数是一样的。还要保证上个命令的黄色字体：c8ad9c.2e4d610cf3e7426e与你修改的字符串要一致

k8s 如何安装grafana k8s 安装教程_k8s 如何安装grafana_03

mkdir -p /root/.kube; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
kubectl create -f bootstrap.secret.yaml

Node节点配置

复制证书

Master01节点复制证书至Node节点

cd /etc/kubernetes/

for NODE in k8s-master02 k8s-master03 k8s-node01 k8s-node02; do
ssh $NODE mkdir -p /etc/kubernetes/pki /etc/etcd/ssl /etc/etcd/ssl
for FILE in etcd-ca.pem etcd.pem etcd-key.pem;do
scp /etc/etcd/ssl/$FILE $NODE:/etc/etcd/ssl/
done
for FILE in pki/ca.pem pki/ca-key.pem pki/front-proxy-ca.pem bootstrap-kubelet.kubeconfig; do
scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}
done
done

Kubelet配置

所有节点创建相关目录

mkdir -p /var/lib/kubelet /var/log/kubernetes /etc/systemd/system/kubelet.service.d /etc/kubernetes/manifests/

所有节点配置kubelet service

vi /usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=docker.service
Requires=docker.service

[Service]
ExecStart=/usr/local/bin/kubelet

Restart=always
StartLimitInterval=0
RestartSec=10

[Install]
WantedBy=multi-user.target

所有节点配置kubelet service的配置文件

vi /etc/systemd/system/kubelet.service.d/10-kubelet.conf
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.2"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node=''"
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS

创建kubelet的配置文件

注意：如果更改了k8s的service网段，需要更改kubelet-conf.yml的clusterDNS:配置，改成k8s Service网段的第十个地址，比如10.96.0.10

vi /etc/kubernetes/kubelet-conf.yml
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s

启动所有节点kubelet

systemctl daemon-reload
systemctl enable --now kubelet

查看集群状态

k8s 如何安装grafana k8s 安装教程_docker_04

kube-proxy配置

以下操作在Master01执行

cd /root/k8s-ha-install
kubectl -n kube-system create serviceaccount kube-proxy
kubectl create clusterrolebinding system:kube-proxy --clusterrole system:node-proxier --serviceaccount kube-system:kube-proxy
SECRET=$(kubectl -n kube-system get sa/kube-proxy --output=jsonpath='{.secrets[0].name}')
JWT_TOKEN=$(kubectl -n kube-system get secret/$SECRET --output=jsonpath='{.data.token}'|base64 -d)
PKI_DIR=/etc/kubernetes/pki
K8S_DIR=/etc/kubernetes
kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://192.168.1.236:8443 --kubeconfig=${K8S_DIR}/kube-proxy.kubeconfig
kubectl config set-credentials kubernetes --token=${JWT_TOKEN} --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config set-context kubernetes --cluster=kubernetes --user=kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
kubectl config use-context kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig

在master01将kube-proxy的systemd Service文件发送到其他节点

如果更改了集群Pod的网段，需要更改
kube-proxy/kube-proxy.conf的clusterCIDR:172.16.0.0/12参数为Pod的网段。vi kube-proxy/kube-proxy.conf（在k8s-ha-install目录下执行）

k8s 如何安装grafana k8s 安装教程_kubernetes_05

for NODE in k8s-master02 k8s-master03;do
scp ${K8S_DIR}/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
done

for NODE in k8s-node01 k8s-node02;do
scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp kube-proxy/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp kube-proxy/kube-proxy.service $NODE:/usr/lib/systemd/system/kube-proxy.service
done

所有节点启动kube-proxy

systemctl daemon-reload
systemctl enable --now kube-proxy

安装Calico

以下步骤只在master01执行

cd /root/k8s-ha-install/calico/

修改calico-etcd.yaml的以下位置

sed -i 's#etcd_endpoints: "http://<ETCD_IP>:<ETCD_PORT>"#etcd_endpoints: "https://192.168.1.107:2379,https://192.168.1.108:2379,https://192.168.1.109:2379"#g' calico-etcd.yaml

ETCD_CA=`cat /etc/kubernetes/pki/etcd/etcd-ca.pem | base64 | tr -d '\n'`
ETCD_CERT=`cat /etc/kubernetes/pki/etcd/etcd.pem | base64 | tr -d '\n'`
ETCD_KEY=`cat /etc/kubernetes/pki/etcd/etcd-key.pem | base64 | tr -d '\n'`
sed -i "s@# etcd-key: null@etcd-key: ${ETCD_KEY}@g; s@# etcd-cert: null@etcd-cert: ${ETCD_CERT}@g; s@# etcd-ca: null@etcd-ca: ${ETCD_CA}@g" calico-etcd.yaml
sed -i "s@# etcd-key: null@etcd-key: ${ETCD_KEY}@g; s@# etcd-cert: null@etcd-cert: ${ETCD_CERT}@g; s@# etcd-ca: null@etcd-ca: ${ETCD_CA}@g" calico-etcd.yaml


set -i 's#etcd_ca: ""#etcd_ca: "/calico-secrets/etcd-ca"#g; s#etcd_cert: ""#etcd_cert: "/calico-secrets/etcd-cert"#g; s#etcd_key: "" #etcd_key: "/calico-secrets/etcd-key" #g' calico-etcd.yaml
sed -i 's#etcd_ca: ""#etcd_ca: "/calico-secrets/etcd-ca"#g; s#etcd_cert: ""#etcd_cert: "/calico-secrets/etcd-cert"#g; s#etcd_key: "" #etcd_key: "/calico-secrets/etcd-key" #g' calico-etcd.yaml


# 更改此处为自己的pod网段
POD_SUBNET="172.16.0.0/12"
sed -i 's@# - name: CALICO_IPV4POOL_CIDR@- name: CALICO_IPV4POOL_CIDR@g; s@#   value: "192.168.0.0/16"@  value: '"${POD_SUBNET}"'@g' calico-etcd.yaml
kubectl apply -f calico-etcd.yaml

查看容器状态

k8s 如何安装grafana k8s 安装教程_k8s 如何安装grafana_06

查看节点状态

k8s 如何安装grafana k8s 安装教程_json_07

安装CoreDNS

安装对应版本（推荐）

cd /root/k8s-ha-install/

如果更改了k8s service的网段需要将coredns的serviceIP改成k8s service网段的第十个IP

sed -i "s#10.96.0.10#10.96.0.10#g" CoreDNS/coredns.yaml

安装coredns

kubectl create -f CoreDNS/coredns.yaml

安装最新版CoreDNS

git clone https://github.com/coredns/deployment.git
cd deployment/kubernetes
./deploy.sh -s -i 10.96.0.10 | kuberctl apply -f -
查看状态
kubectl get pods -n kube-system -I k8s-app=kube-dns

k8s 如何安装grafana k8s 安装教程_docker_08

安装Metrics Server

在新版的Kubernetes中系统资源的采集均使用Metrics-server，可以通过Metrics采集节点和Pod的内存、磁盘、CPU和网络的使用率。

安装metrics server

cd /root/k8s-ha-install/metrics-server-0.4.x/

kubectl create -f .

等待metrics server启动然后查看状态

k8s 如何安装grafana k8s 安装教程_json_09

安装dashboard

Dashboard部署

Dashboard用于展示集群中的各类资源，同时也可以通过Dashboard实时查看Pod的日志和在容器中执行一些命令等。

安装指定版本dashboard（推荐）

cd /root/k8s-ha-install/dashboard/

kubectl create -f .

安装最新版

官方Github地址：
https://github.com/kubernetes/dashboard

可以在官方dashboard查看到最新版dashboard

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.3/aio/deploy/recommended.yaml

创建管理员用户vim admin.yaml

apiVersion:v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kube-system
kubectl apply -f admin.yaml -n kube-system

登录dashboard

在Chrome浏览器启动文件中加入启动参数，用于解决无法访问Dashboard的问题

--test-type --ignore-certificate-errors

k8s 如何安装grafana k8s 安装教程_kubernetes_10

更改dashboard的svc为NodePort：

kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard

k8s 如何安装grafana k8s 安装教程_k8s 如何安装grafana_11

将ClusterIP更改为NodePort（如果已经为NodePort忽略此步骤）：

查看端口号：

k8s 如何安装grafana k8s 安装教程_docker_12

根据自己的实例端口号，通过任意安装了kube-proxy的宿主机或者VIP的IP+端口即可访问到dashboard：

访问dashboard：
https://192.168.1.236:30825/#/login，选择登录方式为令牌（即token方式）

k8s 如何安装grafana k8s 安装教程_kubernetes_13

查看token值

[root@k8s-master-lb dashboard]#  kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
Name:         admin-user-token-hzblx
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: admin-user
              kubernetes.io/service-account.uid: efd2583f-2cb9-4829-96e5-428901a2f931

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1411 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IllRQVIxdm1zLWowdUp5aXdBdU9KNnBhbTQtMkhBRkJ1U092c0FvN0VPU3cifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLWh6Ymx4Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiJlZmQyNTgzZi0yY2I5LTQ4MjktOTZlNS00Mjg5MDFhMmY5MzEiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.gKfex-XB0Kj1B07d4duvKS3UHmXh2k17tda1HENefHGO92wz4mrYVdG6iwZ1L-_lbLgSYh-nD7XLr0DezvVgu-lb8JXYSlKNqoKlaG2w9FUtVgOxfrTJ_9o4PfiZUMbykGBUl4TwnPO4z6QQNEuCpuf1MEuxlCiXrMenYTTg4mtIMZMxXiZevTt69CNK5HboorCQ-_jArbzdRwevVuWzOP_3Sjv939X6pKyhUB0NE6tESywmvnZblpk8BNnY6wfWEPcJxwPYMPrlbZ3XHYH0Y63bo14MB-sC7lMzEOXTQioGA2IXNVDALcwwpvJ-1Ln7zqEtDfHJKg1cQsVr2tiKWA
You have new mail in /var/spool/mail/root
[root@k8s-master-lb dashboard]#

将token值输入到令牌后，单击登录即可访问Dashboard

k8s 如何安装grafana k8s 安装教程_docker_14