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kubernetes高可用+harbor高可用
简介kubernetes高可用+harbor高可用
kubernetes高可用+harbor高可用
基于kubeadm安装kubernetes高可用集群
安装k8s时，node节点网段、service服务网段、pod容器网段，三者之间网段不可以冲突，否则安装失败。
使用kubeadm安装k8s时，所有的组件都是以pod的形式运行。
系统环境：centos7.9
| 节点 | IP | 角色 |
|---|---|---|
| k8smaster1 | 192.168.40.180 | 主节点1 |
| k8smaster2 | 192.168.40.181 | 主节点2 |
| k8snode1 | 192.168.40.182 | 从节点1 |
全部主机环境初始化
# 固化IP地址
cat /etc/sysconfig/network-scripts/ifcfg-ens33
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
DEVICE=ens33
ONBOOT=yes
IPADDR=192.168.40.182
NETMASK=255.255.255.0
GATEWAY=192.168.40.2
DNS1=192.168.40.2
service network restart
# 设置主机名
hostnamectl set-hostname k8smaster1 && bash
# 设置主机名解析
cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.40.180 k8smaster1
192.168.40.181 k8smaster2
192.168.40.182 k8snode1
# 关闭selinux
setenforce 0 && sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config && getenforce
# 关闭交换分区swap，提升性能，使用"free -m"命令检测是否关闭swap
swapoff -a && vi /etc/fstab
#/dev/mapper/centos-swap swap swap defaults 0 0
# 修改内核参数
modprobe br_netfilter && lsmod | grep netfilter
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
# 令配置生效
sysctl -p /etc/sysctl.d/k8s.conf
# 关闭防火墙
systemctl stop firewalld && systemctl disable firewalld
# 配置阿里云的repo源
yum install yum-utils -y
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 配置安装k8s组件需要的阿里元的repo源
vi /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0
# 配置时间同步
yum install ntpdate -y
ntpdate cn.pool.ntp.org
crontab -e
* */1 * * * /usr/sbin/ntpdate cn.pool.ntp.org
service crond restart
# 安装基础软件包
yum install wget net-tools nfs-utils lrzsz gcc gcc-c++ make cmake libxml2-devel openssl-devel curl curl-devel unzip sudo ntp libaio-devel vim ncurses-devel autoconf automake zlib-devel python-devel epel-release openssh-server socat ipvsadm conntrack yum-utils device-mapper-persistent-data lvm2 -y
# 安装docker
yum install docker-ce-20.10.6 docker-ce-cli-20.10.6 containerd.io -y
systemctl start docker && systemctl enable docker && systemctl status docker
# 安装k8s基础软件包
yum install kubelet-1.20.6 kubeadm-1.20.6 kubectl-1.20.6 -y
systemctl enable kubelet
# 配置docker镜像加速器
vi /etc/docker/daemon.json
{
"registry-mirrors":["https://rsbud4vc.mirror.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn","https://dockerhub.azk8s.cn","http://hub-mirror.c.163.com","http://qtid6917.mirror.aliyuncs.com", "https://rncxm540.mirror.aliyuncs.com"],
"exec-opts": ["native.cgroupdriver=systemd"]
}
systemctl daemon-reload && systemctl restart docker && systemctl status docker
# 重启机器
reboot -f
双主节点部署keepalive
yum install epel-release nginx keepalived -y
vi /etc/nginx/nginx.conf
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
# 四层负载均衡，为两台Master apiserver组件提供负载均衡
stream {
log_format main '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';
access_log /var/log/nginx/k8s-access.log main;
upstream k8s-apiserver {
server 192.168.40.180:6443; # Master1 APISERVER IP:PORT
server 192.168.40.181:6443; # Master2 APISERVER IP:PORT
}
server {
listen 16443; # 由于nginx与master节点复用，这个监听端口不能是6443，否则会冲突
proxy_pass k8s-apiserver;
}
}
http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
server {
listen 80 default_server;
server_name _;
location / {
}
}
}
vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/keepalived/check_nginx.sh"
}
vrrp_instance VI_1 {
state MASTER # 主节点2改为BACKUP
interface ens33 # 修改为实际网卡名
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 100 # 优先级，主节点2设置为 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
# 虚拟IP
virtual_ipaddress {
192.168.40.199/24
}
track_script {
check_nginx
}
}
vi /etc/keepalived/check_nginx.sh
#!/bin/bash
#1、判断Nginx是否存活
counter=$(ps -ef |grep nginx | grep sbin | egrep -cv "grep|$$" )
if [ $counter -eq 0 ]; then
#2、如果不存活则尝试启动Nginx
service nginx start
sleep 2
#3、等待2秒后再次获取一次Nginx状态
counter=$(ps -ef |grep nginx | grep sbin | egrep -cv "grep|$$" )
#4、再次进行判断，如Nginx还不存活则停止Keepalived，让地址进行漂移
if [ $counter -eq 0 ]; then
service keepalived stop
fi
fi
chmod +x /etc/keepalived/check_nginx.sh
yum install nginx-mod-stream -y
systemctl start nginx && systemctl start keepalived && systemctl enable nginx keepalived && systemctl status keepalived
双主节点初始化kubeadm
vi /root/kubeadm-config.yaml
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
kubernetesVersion: v1.20.6
controlPlaneEndpoint: 192.168.40.199:16443
imageRepository: registry.aliyuncs.com/google_containers
apiServer:
certSANs:
- 192.168.40.180
- 192.168.40.181
- 192.168.40.182
- 192.168.40.199
networking:
podSubnet: 10.244.0.0/16
serviceSubnet: 10.96.0.0/16
---
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
mode: ipvs
# 导入准备好的镜像。这不是必须的，只是为了跳过下载镜像的过程。如果不导入，默认会从镜像仓库拉取镜像。
# docker load -i k8simage-1-20-6.tar.gz
在k8smaster1节点上初始化k8s
kubeadm init --config kubeadm-config.yaml --ignore-preflight-errors=SystemVerification
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
在k8smaster2节点上做扩容操作
cd /root/ && mkdir -p /etc/kubernetes/pki/etcd && mkdir -p ~/.kube/
# 在k8smaster1节点上执行以下命令，将k8smaster1节点的证书拷贝到k8smaster2上
scp /etc/kubernetes/pki/ca.crt k8smaster2:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/ca.key k8smaster2:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/sa.key k8smaster2:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/sa.pub k8smaster2:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/front-proxy-ca.crt k8smaster2:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/front-proxy-ca.key k8smaster2:/etc/kubernetes/pki/
scp /etc/kubernetes/pki/etcd/ca.crt k8smaster2:/etc/kubernetes/pki/etcd/
scp /etc/kubernetes/pki/etcd/ca.key k8smaster2:/etc/kubernetes/pki/etcd/
# 在k8smaster1节点上执行查看加入节点的命令
kubeadm token create --print-join-command
# 在k8smaster2节点上执行加入命令，以控制节点的身份加入k8s集群
kubeadm join 192.168.40.199:16443 --token 9h31u7.te9nuzupzzst9jy4 --discovery-token-ca-cert-hash sha256:aec91ea6994c432c769bc1671e264e6cfd4e06057ce9b6165c70ec796ea4699b --control-plane --ignore-preflight-errors=SystemVerification
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
kubectl get nodes
# 在k8snode1节点上执行加入命令，以工作节点的身份加入k8s集群
kubeadm join 192.168.40.199:16443 --token 9h31u7.te9nuzupzzst9jy4 --discovery-token-ca-cert-hash sha256:aec91ea6994c432c769bc1671e264e6cfd4e06057ce9b6165c70ec796ea4699b --ignore-preflight-errors=SystemVerification
# 在k8smaster1节点上执行以下命令，安装calico
kubectl apply -f calico.yaml
kubectl get pods -n kube-system
# 查看k8s的配置文件
kubectl config view
# 测试k8s网络能否正常工作
kubectl run busybox --image busybox:1.28 --restart=Never --rm -it busybox -- sh
ping www.baidu.com
nslookup kubernetes.default.svc.cluster.local
harbor高可用集群
系统环境：centos7.9
| 节点 | IP | 角色 |
|---|---|---|
| harbor1 | 192.168.40.190 | harbor节点1 |
| harbor2 | 192.168.40.191 | harbor节点2 |
本次使用dockercompose安装harbor。
初始化harbor1节点安装环境
hostnamectl set-hostname harbor1 && bash
# 关闭防火墙
systemctl stop firewalld && systemctl disable firewalld
# 配置阿里云的repo源
yum install yum-utils -y
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 关闭selinux
setenforce 0 && sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config && getenforce
# 安装基础软件包
yum install wget net-tools nfs-utils lrzsz gcc gcc-c++ make cmake libxml2-devel openssl-devel curl curl-devel unzip sudo ntp libaio-devel vim ncurses-devel autoconf automake zlib-devel python-devel epel-release openssh-server socat ipvsadm conntrack yum-utils device-mapper-persistent-data lvm2 -y
# 配置时间同步
yum install ntpdate -y
ntpdate cn.pool.ntp.org
crontab -e
* */1 * * * /usr/sbin/ntpdate cn.pool.ntp.org
# 安装docker
yum install docker-ce -y && systemctl start docker && systemctl enable docker && systemctl status docker
mkdir -p /data/ssl && cd /data/ssl/
openssl genrsa -out ca.key 3072
# 生成ca证书，其中3650代表证书的有效时间是3年
openssl req -new -x509 -days 3650 -key ca.key -out ca.pem
Country Name (2 letter code) [XX]:CN
State or Province Name (full name) []:SD
Locality Name (eg, city) [Default City]:JN
Organization Name (eg, company) [Default Company Ltd]:
Organizational Unit Name (eg, section) []:
Common Name (eg, your name or your server's hostname) []:harbor1.xingfafa.com
Email Address []:
openssl genrsa -out harbor.key 3072
openssl req -new -key harbor.key -out harbor.csr
Country Name (2 letter code) [XX]:CN
State or Province Name (full name) []:SD
Locality Name (eg, city) [Default City]:JN
Organization Name (eg, company) [Default Company Ltd]:
Organizational Unit Name (eg, section) []:
Common Name (eg, your name or your server's hostname) []:harbor1.xingfafa.com
Email Address []:
Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:
openssl x509 -req -in harbor.csr -CA ca.pem -CAkey ca.key -CAcreateserial -out harbor.pem -days 3650
# 安装docker-ce
yum install docker-ce -y && systemctl start docker && systemctl enable docker && systemctl status docker
# 修改内核参数
modprobe br_netfilter && lsmod | grep netfilter
cat > /etc/sysctl.d/docker.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
# 令配置生效
sysctl -p /etc/sysctl.d/docker.conf
systemctl restart docker && systemctl status docker
# 配置docker镜像加速器，打开网址：https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors
sudo mkdir -p /etc/docker && sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://mq4yrzyb.mirror.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn","https://dockerhub.azk8s.cn","http://hub-mirror.c.163.com"]
}
EOF
sudo systemctl daemon-reload && sudo systemctl restart docker
# 为harbor创建安装目录
mkdir /opt/project/harbor -p && cd /opt/project/harbor
# 下载最新的harbor。下载地址：https://github.com/goharbor/harbor/releases
tar zxvf harbor-offline-installer-v2.8.1.tgz && cd harbor
cp harbor.yml.tmpl harbor.yml
vim harbor.yml
hostname: harbor1.xingfafa.com
certificate: /data/ssl/harbor.pem
private_key: /data/ssl/harbor.key
打开网址：https://github.com/docker/compose/releases/tag/v2.18.1 ，下载docker-compose二进制文件
mv docker-compose-linux-x86_64 /usr/bin/docker-compose
chmod +x /usr/bin/docker-compose
docker-compose version
docker load -i harbor.v2.8.1.tar.gz
./install.sh
# 修改pc端hosts文件，增加"192.168.40.190 harbor1"
# 打开浏览器，访问地址：https://harbor1
# harbor默认的账号密码：admin/Harbor12345
在另一台节点上配置使用私有harbor仓库
vim /etc/docker/daemon.json
{
"registry-mirrors": ["https://mq4yrzyb.mirror.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn","https://dockerhub.azk8s.cn","http://hub-mirror.c.163.com"],
"insecure-registries": ["192.168.40.190","harbor1"]
}
systemctl daemon-reload && systemctl restart docker && systemctl status docker.service
echo "192.168.40.190 harbor1" >> /etc/hosts
# 登录harbor1，用户名：admin，密码：Harbor12345
docker login 192.168.40.190
使用harbor控制台创建一个项目，比如project1
# 打标签创建一个符合格式的自制镜像
docker tag busybox:1.28 192.168.40.190/project1/busybox:v1
# push自制的镜像
docker push 192.168.40.190/project1/busybox:v1
在harbor控制台可看到上传好的自制镜像
# 清理本地镜像，从私有镜像仓库拉取镜像
docker rmi busybox:1.28 192.168.40.190/project1/busybox:v1
docker pull 192.168.40.190/project1/busybox:v1
初始化harbor2节点安装环境
hostnamectl set-hostname harbor2 && bash
systemctl stop firewalld && systemctl disable firewalld
yum install yum-utils -y
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
setenforce 0 && sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config && getenforce
yum install wget net-tools nfs-utils lrzsz gcc gcc-c++ make cmake libxml2-devel openssl-devel curl curl-devel unzip sudo ntp libaio-devel vim ncurses-devel autoconf automake zlib-devel python-devel epel-release openssh-server socat ipvsadm conntrack yum-utils device-mapper-persistent-data lvm2 -y
yum install ntpdate -y
ntpdate cn.pool.ntp.org
crontab -e
* */1 * * * /usr/sbin/ntpdate cn.pool.ntp.org
yum install docker-ce -y && systemctl start docker && systemctl enable docker && systemctl status docker
mkdir -p /data/ssl && cd /data/ssl/
openssl genrsa -out ca.key 3072
openssl req -new -x509 -days 3650 -key ca.key -out ca.pem
openssl genrsa -out harbor.key 3072
openssl req -new -key harbor.key -out harbor.csr
openssl x509 -req -in harbor.csr -CA ca.pem -CAkey ca.key -CAcreateserial -out harbor.pem -days 3650
yum install docker-ce -y && systemctl start docker && systemctl enable docker && systemctl status docker
modprobe br_netfilter && lsmod | grep netfilter
cat > /etc/sysctl.d/docker.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
sysctl -p /etc/sysctl.d/docker.conf
systemctl restart docker && systemctl status docker
sudo mkdir -p /etc/docker && sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://mq4yrzyb.mirror.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn","https://dockerhub.azk8s.cn","http://hub-mirror.c.163.com"]
}
EOF
sudo systemctl daemon-reload && sudo systemctl restart docker
mkdir /opt/project/harbor -p && cd /opt/project/harbor
tar zxvf harbor-offline-installer-v2.8.1.tgz && cd harbor
cp harbor.yml.tmpl harbor.yml
vim harbor.yml
hostname: harbor2.xingfafa.com
certificate: /data/ssl/harbor.pem
private_key: /data/ssl/harbor.key
mv docker-compose-linux-x86_64 /usr/bin/docker-compose
chmod +x /usr/bin/docker-compose
docker-compose version
docker load -i harbor.v2.8.1.tar.gz
./install.sh
# 修改pc端hosts文件，增加"192.168.40.191 harbor2"
# 打开浏览器，访问地址：https://harbor2
# harbor默认的账号密码：admin/Harbor12345
在https://harbor2.xingfafa.com/harbor/registries的控制台中新增目标（使用https的控制台需要其他配置）
在https://harbor2.xingfafa.com/harbor/registries的控制台中新增目标
在harbor2控制台做相同的配置，令双方双向复制即可。
部署keepalive+nginx
yum install epel-release nginx keepalived -y
cat /etc/nginx/nginx.conf
worker_processes 1;
events {
use epoll;
worker_connections 4096;
}
http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request"' '$status $body_bytes_sent "$http_referer"' '"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
keepalive_timeout 65;
upstream web_servers {
server 192.168.40.190:443;
server 192.168.40.191:443;
}
server {
listen 18080;
ssl on;
ssl_certificate /data/ssl/harbor.pem;
ssl_certificate_key /data/ssl/harbor.key;
server_name 192.168.40.209;
charset utf-8;
location / {
root html;
index index.html index.php;
proxy_pass https://web_servers;
}
}
}
vi /etc/keepalived/keepalived.conf
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id NGINX_MASTER
}
vrrp_script check_nginx {
script "/etc/keepalived/check_nginx.sh"
}
vrrp_instance VI_1 {
state MASTER
interface ens33 # 修改为实际网卡名
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 100 # 优先级，备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
# 虚拟IP
virtual_ipaddress {
192.168.40.209/24
}
track_script {
check_nginx
}
}
vi /etc/keepalived/check_nginx.sh
#!/bin/bash
#1、判断Nginx是否存活
counter=$(ps -ef |grep nginx | grep sbin | egrep -cv "grep|$$" )
if [ $counter -eq 0 ]; then
#2、如果不存活则尝试启动Nginx
service nginx start
sleep 2
#3、等待2秒后再次获取一次Nginx状态
counter=$(ps -ef |grep nginx | grep sbin | egrep -cv "grep|$$" )
#4、再次进行判断，如Nginx还不存活则停止Keepalived，让地址进行漂移
if [ $counter -eq 0 ]; then
service keepalived stop
fi
fi
chmod +x /etc/keepalived/check_nginx.sh
yum install nginx-mod-stream -y
systemctl start nginx && systemctl start keepalived && systemctl enable nginx keepalived && systemctl status keepalived
# docker login harbor1.xingfafa.com:18080
# cat /etc/docker/daemon.json
#{
# "registry-mirrors": ["https://mq4yrzyb.mirror.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn","https://dockerhub.azk8s.cn","http://hub-mirror.c.163.com","http://192.168.40.190","http://192.168.40.191","https://192.168.40.209:18080"],
# "insecure-registries": ["192.168.40.190","harbor1.xingfafa.com","192.168.40.191","harbor2","192.168.40.209:18080"]
#}
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