Harbor高可用（nginx和keepalived）

Harbor高可用（nginx和keepalived）

文章目录

  • Harbor高可用（nginx和keepalived）
  • 1.Harbor高可用集群部署架构
    • 1.1 主机初始化
      • 1.1.1 设置网卡名和ip地址
      • 1.1.2 设置主机名
      • 1.1.3 配置镜像源
      • 1.1.4 关闭防火墙
      • 1.1.5 禁用SELinux
      • 1.1.6 设置时区
    • 1.2 安装 Nginx
    • 1.3 安装 Keepalived
    • 1.4 安装harbor
    • 1.5 创建harbor仓库
    • 1.6 在docker客户端验证

1.Harbor高可用集群部署架构

本示例中的Harbor高可用集群部署将基于以下环境进行。

t1-1

图1-1 Harbor高可用架构

表1-1 高可用Harbor集群规划

角色机器名机器配置ip地址安装软件
提供高可用及负载均衡ha01.example.local2C2G172.31.3.104nginx、keepalived
提供高可用及负载均衡ha02.example.local2C2G172.31.3.105nginx、keepalived
容器镜像仓库1harbor01.example.local2C2G172.31.3.106docker、docker-compose、harbor
容器镜像仓库2harbor02.example.local2C2G172.31.3.107docker、docker-compose、harbor
docker客户端client.example.local2C2G172.31.0.8docker
VIP，在ha01和ha02主机实现172.31.3.188

1.1 主机初始化

1.1.1 设置网卡名和ip地址

Rocky 9和CentOS Stream 9：

# Rocky 9和CentOS Stream 9默认支持修改网卡名。
[root@rocky9 ~]# grep 'plugins' /etc/NetworkManager/NetworkManager.conf 
#plugins=keyfile,ifcfg-rh
# 因为网卡命名方式默认是keyfile，默认不支持修改网卡名，既然官方已经默认是keyfile那这里就不去更改网卡名了。[root@rocky9 ~]# ETHNAME=`ip addr | awk -F"[ :]" '/^2/{print $3}'`[root@rocky9 ~]# nmcli con delete ${ETHNAME} && nmcli connection add type ethernet con-name ${ETHNAME} ifname ${ETHNAME} ipv4.method manual ipv4.address "172.31.0.9/21" ipv4.gateway "172.31.0.2" ipv4.dns "223.5.5.5,180.76.76.76" autoconnect yes && nmcli con reload && nmcli con up ${ETHNAME}
# 172.31.0.9/21中172.31.0.9是ip地址，21是子网位数；172.31.0.2是网关地址；223.5.5.5, 180.76.76.76都是DNS，根据自己的需求修改。[root@rocky9 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:37:62:95 brd ff:ff:ff:ff:ff:ffaltname enp3s0inet 172.31.0.9/21 brd 172.31.7.255 scope global noprefixroute ens160valid_lft forever preferred_lft foreverinet6 fe80::51ca:fd5d:3552:677d/64 scope link noprefixroute valid_lft forever preferred_lft forever
# 可以看到ip地址已修改。

Rocky 8、CentOS Stream 8和CentOS 7：

# Rocky 8、CentOS Stream 8和CentOS 7支持修改网卡名。
[root@rocky8 ~]# grep 'plugins' /etc/NetworkManager/NetworkManager.conf 
#plugins=ifcfg-rh
# 因为网卡命名方式默认是ifcfg-rh，支持修改网卡名。# 修改网卡名称配置文件
[root@rocky8 ~]# sed -ri.bak '/^GRUB_CMDLINE_LINUX=/s@"$@ net.ifnames=0 biosdevname=0"@' /etc/default/grub
[root@rocky8 ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
done# 修改网卡文件名
[root@rocky8 ~]# ETHNAME=`ip addr | awk -F"[ :]" '/^2/{print $3}'`
[root@rocky8 ~]# mv /etc/sysconfig/network-scripts/ifcfg-${ETHNAME} /etc/sysconfig/network-scripts/ifcfg-eth0[root@rocky8 ~]# shutdown -r now[root@rocky8 ~]# nmcli dev
DEVICE  TYPE      STATE      CONNECTION         
eth0    ethernet  connected  Wired connection 1 
lo      loopback  unmanaged  --
# 可以看到CONNECTION的名字是Wired connection 1，要改名才可以下面设置。[root@rocky8 ~]# ETHNAME=`ip addr | awk -F"[ :]" '/^2/{print $3}'`[root@rocky8 ~]# nmcli connection modify "Wired connection 1" con-name ${ETHNAME}
[root@rocky8 ~]# nmcli dev
DEVICE  TYPE      STATE      CONNECTION 
eth0    ethernet  connected  eth0       
lo      loopback  unmanaged  --  # 修改ip地址
[root@rocky8 ~]# nmcli con delete ${ETHNAME} && nmcli connection add type ethernet con-name ${ETHNAME} ifname ${ETHNAME} ipv4.method manual ipv4.address "172.31.0.8/21" ipv4.gateway "172.31.0.2" ipv4.dns "223.5.5.5,180.76.76.76" autoconnect yes && nmcli con reload && nmcli dev up eth0
# 172.31.0.8/21中172.31.0.8是ip地址，21是子网位数；172.31.0.2是网关地址；223.5.5.5, 180.76.76.76都是DNS，根据自己的需求修改。[root@rocky8 ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000link/ether 00:0c:29:6f:65:d3 brd ff:ff:ff:ff:ff:ffaltname enp3s0altname ens160inet 172.31.0.8/21 brd 172.31.7.255 scope global noprefixroute eth0valid_lft forever preferred_lft foreverinet6 fe80::e9c9:aa93:4a58:2cc2/64 scope link noprefixroute valid_lft forever preferred_lft forever
# 重启系统后可以看到网卡名已经修改成eth0，ip地址也已修改。

Ubuntu：

# Ubuntu先启用root用户，并设置密码
raymond@ubuntu2204:~$ cat set_root_login.sh 
#!/bin/bashread -p "请输入密码: " PASSWORD
echo ${PASSWORD} |sudo -S sed -ri 's@#(PermitRootLogin )prohibit-password@\1yes@' /etc/ssh/sshd_config
sudo systemctl restart sshd
sudo -S passwd root <<-EOF
${PASSWORD}
${PASSWORD}
EOFraymond@ubuntu2204:~$ bash set_root_login.sh 
请输入密码: 123456
[sudo] password for raymond: New password: Retype new password: passwd: password updated successfullyraymond@ubuntu2204:~$ rm -rf set_root_login.sh# 使用root登陆，修改网卡名
root@ubuntu2204:~# sed -ri.bak '/^GRUB_CMDLINE_LINUX=/s@"$@net.ifnames=0 biosdevname=0"@' /etc/default/grub
root@ubuntu2204:~# grub-mkconfig -o /boot/grub/grub.cfg
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.15.0-88-generic
Found initrd image: /boot/initrd.img-5.15.0-88-generic
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
done# Ubuntu 20.04设置ip地址
root@ubuntu2004:~# cat > /etc/netplan/00-installer-config.yaml <<-EOF
network:version: 2renderer: networkdethernets:eth0:dhcp4: nodhcp6: noaddresses: [172.31.0.20/21] gateway4: 172.31.0.2nameservers:addresses: [223.5.5.5, 180.76.76.76]
EOF
# 说明：Ubuntu20.04网卡配置文件是00-installer-config.yaml；172.31.0.20/21中172.31.0.20是ip地址，21是子网位数；172.31.0.2是网关地址；223.5.5.5, 180.76.76.76都是DNS，根据自己的需求修改。# Ubuntu 18.04设置ip地址
root@ubuntu1804:~# cat > /etc/netplan/01-netcfg.yaml <<-EOF
network:version: 2renderer: networkdethernets:eth0:dhcp4: nodhcp6: noaddresses: [172.31.0.18/21] gateway4: 172.31.0.2nameservers:addresses: [223.5.5.5, 180.76.76.76]
EOF
# 说明：Ubuntu18.04网卡配置文件是01-netcfg.yaml；172.31.0.18/21中172.31.0.18是ip地址，21是子网位数；172.31.0.2是网关地址；223.5.5.5, 180.76.76.76都是DNS，根据自己的需求修改。root@ubuntu2004:~# shutdown -r nowroot@ubuntu2004:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:e5:98:6f brd ff:ff:ff:ff:ff:ffinet 172.31.0.20/21 brd 172.31.7.255 scope global eth0valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fee5:986f/64 scope link valid_lft forever preferred_lft forever
# 重启系统后可以看到网卡名已经修改成eth0，ip地址也已修改。# Ubuntu 22.04设置ip地址
root@ubuntu2204:~# cat > /etc/netplan/00-installer-config.yaml <<-EOF
network:version: 2renderer: networkdethernets:eth0:dhcp4: nodhcp6: noaddresses: [172.31.0.22/21]routes:- to: defaultvia: 172.31.0.2nameservers:addresses: [223.5.5.5, 180.76.76.76]
EOF
# 说明：Ubuntu 22.04网卡配置文件是00-installer-config.yaml；172.31.0.22/21中172.31.0.22是ip地址，21是子网位数；172.31.0.2是网关地址，Ubuntu 22.04设置网关地址的方法发生了改变，参考上面的方法；223.5.5.5, 180.76.76.76都是DNS，根据自己的需求修改。root@ubuntu2204:~# shutdown -r now# 重启后使用新设置的ip登陆
root@ubuntu2204:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:a7:be:f2 brd ff:ff:ff:ff:ff:ffaltname enp2s1altname ens33inet 172.31.0.22/21 brd 172.31.7.255 scope global eth0valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fea7:bef2/64 scope link valid_lft forever preferred_lft forever
# 重启系统后可以看到网卡名已经修改成eth0，ip地址也已修改。

1.1.2 设置主机名

hostnamectl set-hostname ha01.example.local
hostnamectl set-hostname ha02.example.local
hostnamectl set-hostname harbor01.example.local
hostnamectl set-hostname harbor02.example.local
hostnamectl set-hostname client.example.local

1.1.3 配置镜像源

Rocky 8和9：

MIRROR=mirrors.sjtug.sjtu.edu.cn
sed -i.bak -e 's|^mirrorlist=|#mirrorlist=|g' -e 's|^#baseurl=http://dl.rockylinux.org/$contentdir|baseurl=https://'${MIRROR}'/rocky|g' /etc/yum.repos.d/[Rr]ocky*.repodnf clean all && dnf makecache

CentOS Stream 9：

cat update_mirror.pl
#!/usr/bin/perluse strict;
use warnings;
use autodie;# 要修改镜像源，请去修改url变量！
my $url = 'mirrors.aliyun.com';
my $mirrors = "https://$url/centos-stream";if (@ARGV < 1) {die "Usage: $0 <filename1> <filename2> ...\n";
}while (my $filename = shift @ARGV) {my $backup_filename = $filename . '.bak';rename $filename, $backup_filename;open my $input, "<", $backup_filename;open my $output, ">", $filename;while (<$input>) {s/^metalink/# metalink/;if (m/^name/) {my (undef, $repo, $arch) = split /-/;$repo =~ s/^\s+|\s+$//g;($arch = defined $arch ? lc($arch) : '') =~ s/^\s+|\s+$//g;if ($repo =~ /^Extras/) {$_ .= "baseurl=${mirrors}/SIGs/\$releasever-stream/extras" . ($arch eq 'source' ? "/${arch}/" : "/\$basearch/") . "extras-common\n";} else {$_ .= "baseurl=${mirrors}/\$releasever-stream/$repo" . ($arch eq 'source' ? "/" : "/\$basearch/") . ($arch ne '' ? "${arch}/tree/" : "os") . "\n";}}print $output $_;}
}rpm -q perl &> /dev/null || { echo -e "\\033[01;31m "安装perl工具,请稍等..."\033[0m";yum -y install perl ; }perl ./update_mirror.pl /etc/yum.repos.d/centos*.repodnf clean all && dnf makecache

CentOS Stream 8：

MIRROR=mirrors.aliyun.com
sed -i.bak -e 's|^mirrorlist=|#mirrorlist=|g' -e 's|^#baseurl=http://mirror.centos.org/$contentdir|baseurl=https://'${MIRROR}'/centos|g' /etc/yum.repos.d/CentOS-*.repodnf clean all && dnf makecache

CentOS 7：

MIRROR=mirrors.aliyun.com
sed -i.bak -e 's|^mirrorlist=|#mirrorlist=|g' -e 's|^#baseurl=http://mirror.centos.org|baseurl=https://'${MIRROR}'|g' /etc/yum.repos.d/CentOS-*.repoyum clean all && yum makecache

Ubuntu 22.04和20.04：

MIRROR=mirrors.aliyun.com
OLD_MIRROR=`sed -rn "s@^deb http(.*)://(.*)/ubuntu/? $(lsb_release -cs) main.*@\2@p" /etc/apt/sources.list`sed -i.bak 's/'${OLD_MIRROR}'/'${MIRROR}'/g' /etc/apt/sources.listapt update

Ubuntu 18.04：

MIRROR=mirrors.aliyun.com
OLD_MIRROR=`sed -rn "s@^deb http(.*)://(.*)/ubuntu/? $(lsb_release -cs) main.*@\2@p" /etc/apt/sources.list`sed -i.bak 's/'${OLD_MIRROR}'/'${MIRROR}'/g' /etc/apt/sources.listSECURITY_MIRROR=`sed -rn "s@^deb http(.*)://(.*)/ubuntu $(lsb_release -cs)-security main.*@\2@p" /etc/apt/sources.list`sed -i.bak 's/'${SECURITY_MIRROR}'/'${MIRROR}'/g' /etc/apt/sources.listapt update

1.1.4 关闭防火墙

# Rocky和CentOS
systemctl disable --now firewalld# CentOS 7
systemctl disable --now NetworkManager# Ubuntu
systemctl disable --now ufw

1.1.5 禁用SELinux

#CentOS
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config#Ubuntu
Ubuntu没有安装SELinux，不用设置

1.1.6 设置时区

ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone#Ubuntu还要设置下面内容
cat >> /etc/default/locale <<-EOF
LC_TIME=en_DK.UTF-8
EOF

1.2 安装 Nginx

这里使用"一键编译安装nginx脚本"安装nginx，nginx的具体安装方法请参考博客“https://raymond.blog.csdn.net/article/details/135960659”。

[root@ha01 ~]# cat install_nginx.sh 
#!/bin/bash
#
#************************************************************************************************************
#Author:        Raymond
#QQ:            88563128
#Date:          2024-01-31
#FileName:      install_nginx.sh
#URL:           raymond.blog.csdn.net
#Description:   install_haproxy for CentOS 7 & CentOS Stream 8/9 & Ubuntu 18.04/20.04/22.04 & Rocky 8/9
#Copyright (C): 2024 All rights reserved
#************************************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'NGINX_URL=https://nginx.org/download/
NGINX_FILE=nginx-1.24.0.tar.gz
NGINX_INSTALL_DIR=/apps/nginx
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
HARBOR01=172.31.3.106
HARBOR02=172.31.3.107os(){OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
}check_file (){cd ${SRC_DIR}if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;thenrpm -q wget &> /dev/null || { ${COLOR}"安装wget工具，请稍等..."${END};yum -y install wget &> /dev/null; }fiif [ ! -e ${NGINX_FILE} ];then${COLOR}"缺少${NGINX_FILE}文件"${END}${COLOR}'开始下载Nginx源码包'${END}wget ${NGINX_URL}${NGINX_FILE} || { ${COLOR}"Nginx源码包下载失败"${END}; exit; }else${COLOR}"${NGINX_FILE}文件已准备好"${END}       fi
} install_nginx(){[ -d ${NGINX_INSTALL_DIR} ] && { ${COLOR}"Nginx已存在，安装失败"${END};exit; }${COLOR}"开始安装Nginx"${END}${COLOR}"开始安装Nginx依赖包，请稍等..."${END}if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;thenyum -y install make gcc pcre-devel openssl-devel zlib-devel &> /dev/nullelseapt update &> /dev/null;apt -y install make gcc libpcre3 libpcre3-dev openssl libssl-dev zlib1g-dev &> /dev/nullfiid nginx  &> /dev/null || { useradd -s /sbin/nologin -r nginx; ${COLOR}"创建Nginx用户"${END}; }tar xf ${NGINX_FILE}NGINX_DIR=`echo ${NGINX_FILE}| sed -nr 's/^(.*[0-9]).*/\1/p'`cd ${NGINX_DIR}./configure --prefix=${NGINX_INSTALL_DIR} --user=nginx --group=nginx --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_stub_status_module --with-http_gzip_static_module --with-pcre --with-stream --with-stream_ssl_module --with-stream_realip_module make -j ${CPUS} && make install [ $? -eq 0 ] && ${COLOR}"Nginx编译安装成功"${END} ||  { ${COLOR}"Nginx编译安装失败,退出!"${END};exit; }chown -R nginx.nginx /apps/nginxecho "PATH=${NGINX_INSTALL_DIR}/sbin:${PATH}" > /etc/profile.d/nginx.shcat > ${NGINX_INSTALL_DIR}/conf/nginx.conf <<EOF
user nginx;
worker_processes 1;
error_log  logs/error.log;
pid        logs/nginx.pid;
events {worker_connections  1024;
}
stream {log_format  main  '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent';access_log  logs/access.log  main;upstream harbor_server {hash \$remote_addr consistent;server ${HARBOR01}:80 max_fails=3 fail_timeout=30s;server ${HARBOR02}:80 max_fails=3 fail_timeout=30s;}server {listen 80;proxy_connect_timeout 1s;proxy_timeout 3s;proxy_pass harbor_server;}
}
EOFcat > /lib/systemd/system/nginx.service <<EOF
[Unit]
Description=nginx - high performance web server
Documentation=http://nginx.org/en/docs/
After=network-online.target remote-fs.target nss-lookup.target
Wants=network-online.target[Service]
Type=forking
PIDFile=${NGINX_INSTALL_DIR}/logs/nginx.pid
ExecStart=${NGINX_INSTALL_DIR}/sbin/nginx -c ${NGINX_INSTALL_DIR}/conf/nginx.conf
ExecReload=/bin/kill -s HUP \$MAINPID
ExecStop=/bin/kill -s TERM \$MAINPID
LimitNOFILE=100000[Install]
WantedBy=multi-user.target
EOFsystemctl daemon-reloadsystemctl enable --now nginx &> /dev/null systemctl is-active nginx &> /dev/null ||  { ${COLOR}"Nginx 启动失败,退出!"${END} ; exit; }${COLOR}"Nginx安装完成"${END}
}main(){oscheck_fileinstall_nginx
}main# 分别在ha01和ha02执行安装
[root@ha01 ~]# bash install_nginx.sh[root@ha02 ~]# bash install_nginx.sh

nginx.conf文件详解

[root@ha01 ~]# 
user nginx; # 指定Nginx进程的运行用户
worker_processes 1; # 表示启动一个worker进程用于处理流量
error_log  logs/error.log; # 错误日志路径
pid        logs/nginx.pid; # pid路径
events {worker_connections  1024; # 表示每个worker进程可以同时处理最多1024个连接。
}# 四层负载均衡，为两台harbor提供负载均衡
stream {log_format  main  '$remote_addr $upstream_addr - [$time_local] $status $upstream_bytes_sent'; # 日志格式access_log  logs/access.log  main; # 访问日志路径upstream harbor_server { # 在stream块里面，定义了一个名为`harbor_server`的upstream，用于负载均衡和故障转移。hash $remote_addr consistent;server 172.31.3.106:80 max_fails=3 fail_timeout=30s; # `server`指令用于定义后端的服务器，每个服务器都有一个IP地址和端口号，以及一些可选的参数；`max_fails=3`表示当一个服务器连续失败3次时将其标记为不可用；fail_timeout=30s`表示如果一个服务器被标记为不可用，nginx将在30秒后重新尝试。server 172.31.3.107:80 max_fails=3 fail_timeout=30s;}server {listen 80; # 在server块内部，定义了一个监听地址为80的服务器proxy_connect_timeout 1s; # 表示与后端服务器建立连接的超时时间为1秒。proxy_timeout 3s; # 表示与后端服务器建立连接的转发超时时间为2秒proxy_pass harbor_server; # 表示将流量代理到名为harbor_server的上游服务器组}
}

1.3 安装 Keepalived

这里使用"一键编译安装keepalived脚本"安装keepalived，keepalived的具体安装方法请参考博客“https://raymond.blog.csdn.net/article/details/135876134”。

# "check_nginx.sh"文件是nginx健康检查文件。
[root@ha01 ~]# cat check_nginx.sh 
#!/bin/bash
#
#**********************************************************************************************
#Author:        Raymond
#QQ:            88563128
#Date:          2022-01-09
#FileName:      check_nginx.sh
#URL:           raymond.blog.csdn.net
#Description:   The test script
#Copyright (C): 2022 All rights reserved
#*********************************************************************************************
err=0
for k in $(seq 1 3);docheck_code=$(pgrep nginx)if [[ $check_code == "" ]]; thenerr=$(expr $err + 1)sleep 1continueelseerr=0breakfi
doneif [[ $err != "0" ]]; thenecho "systemctl stop keepalived"/usr/bin/systemctl stop keepalivedexit 1
elseexit 0
fi[root@ha01 ~]# cat install_keepalived_v2.sh 
#!/bin/bash
#
#************************************************************************************************************
#Author:        Raymond
#QQ:            88563128
#Date:          2024-01-26
#FileName:      install_keepalived_v2.sh
#URL:           raymond.blog.csdn.net
#Description:   install_keepalived for CentOS 7 & CentOS Stream 8/9 & Ubuntu 18.04/20.04/22.04 & Rocky 8/9
#Copyright (C): 2024 All rights reserved
#************************************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
KEEPALIVED_URL=https://keepalived.org/software/
KEEPALIVED_FILE=keepalived-2.2.8.tar.gz
KEEPALIVED_INSTALL_DIR=/apps/keepalived
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
NET_NAME=`ip a |awk -F"[: ]" '/^2/{print $3}'`
VIP=172.31.3.188os(){OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' /etc/os-release`
}check_file (){cd  ${SRC_DIR}if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;thenrpm -q wget &> /dev/null || { ${COLOR}"安装wget工具，请稍等..."${END};yum -y install wget &> /dev/null; }fiif [ ! -e ${KEEPALIVED_FILE} ];then${COLOR}"缺少${KEEPALIVED_FILE}文件,如果是离线包,请放到${SRC_DIR}目录下"${END}${COLOR}'开始下载Keepalived源码包'${END}wget ${KEEPALIVED_URL}${KEEPALIVED_FILE} || { ${COLOR}"Keepalived源码包下载失败"${END}; exit; }elif [ ! -e check_nginx.sh ];then${COLOR}"缺少check_nginx.sh文件,请把文件放到${SRC_DIR}目录下"${END}exitelse${COLOR}"相关文件已准备好"${END}fi
}install_keepalived(){${COLOR}"开始安装Keepalived，请稍等..."${END}${COLOR}"开始安装Keepalived依赖包，请稍等..."${END}if [ ${OS_ID} == "Rocky" -a ${OS_RELEASE_VERSION} == 8 ];thenMIRROR=mirrors.sjtug.sjtu.edu.cnif [ `grep -R "\[powertools\]" /etc/yum.repos.d/*.repo` ];thendnf config-manager --set-enabled powertoolselsecat > /etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${MIRROR}/rocky/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
EOFfifiif [ ${OS_ID} == "CentOS" -a ${OS_RELEASE_VERSION} == 8 ];thenMIRROR=mirrors.aliyun.comif [ `grep -R "\[powertools\]" /etc/yum.repos.d/*.repo` ];thendnf config-manager --set-enabled powertoolselsecat > /etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${MIRROR}/centos/\$stream/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
EOFfifiif [ ${OS_RELEASE_VERSION} == 9 ];thenyum -y install make gcc ipvsadm autoconf automake openssl-devel libnl3-devel iptables-devel ipset file net-snmp-devel glib2-devel pcre2-devel libnftnl libmnl systemd-devel &> /dev/nullelif [ ${OS_RELEASE_VERSION} == 8 ];then	yum -y install make gcc ipvsadm autoconf automake openssl-devel libnl3-devel iptables-devel ipset-devel file-devel net-snmp-devel glib2-devel pcre2-devel libnftnl-devel libmnl-devel systemd-devel &> /dev/nullelif [ ${OS_RELEASE_VERSION} == 7 ];thenyum -y install make gcc libnfnetlink-devel libnfnetlink ipvsadm libnl libnl-devel libnl3 libnl3-devel lm_sensors-libs net-snmp-agent-libs net-snmp-libs openssh-server openssh-clients openssl openssl-devel automake iproute &> /dev/nullelif [ ${OS_RELEASE_VERSION} == "20" -o ${OS_RELEASE_VERSION} == "22" ];thenapt update &> /dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-develseapt update &> /dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf iptables-dev libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev &> /dev/nullfitar xf ${KEEPALIVED_FILE}KEEPALIVED_DIR=`echo ${KEEPALIVED_FILE} | sed -nr 's/^(.*[0-9]).*/\1/p'`cd ${KEEPALIVED_DIR}./configure --prefix=${KEEPALIVED_INSTALL_DIR} --disable-fwmarkmake -j $CPUS && make install[ $? -eq 0 ] && $COLOR"Keepalived编译安装成功"$END ||  { $COLOR"Keepalived编译安装失败,退出!"$END;exit; }[ -d /etc/keepalived ] || mkdir -p /etc/keepalived &> /dev/nullread -p "请输入是主服务断或备用服务端，例如（MASTER或BACKUP）: " STATEread -p "请输入优先级，例如（100或80）: " PRIORITYcat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalivedglobal_defs {router_id LVS_DEVELscript_user rootenable_script_security
}vrrp_script check_nginx {script "/etc/keepalived/check_nginx.sh"interval 5weight -5fall 2  rise 1
}vrrp_instance VI_1 {state ${STATE}interface ${NET_NAME}virtual_router_id 51priority ${PRIORITY}advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {${VIP} dev ${NET_NAME} label ${NET_NAME}:1   }track_script {check_nginx}
}
EOFcp ./keepalived/keepalived.service /lib/systemd/system/cd  ${SRC_DIR}mv check_nginx.sh /etc/keepalived/check_nginx.shchmod +x /etc/keepalived/check_nginx.shecho "PATH=${KEEPALIVED_INSTALL_DIR}/sbin:${PATH}" > /etc/profile.d/keepalived.shsystemctl daemon-reloadsystemctl enable --now keepalived &> /dev/null systemctl is-active keepalived &> /dev/null ||  { ${COLOR}"Keepalived 启动失败,退出!"${END} ; exit; }${COLOR}"Keepalived安装完成"${END}
}main(){oscheck_fileinstall_keepalived
}main# 分别在ha01和ha02执行安装
[root@ha01 ~]# bash install_keepalived_v2.sh
...
请输入是主服务断或备用服务端，例如（MASTER或BACKUP）: MASTER
请输入优先级，例如（100或80）: 100[root@ha02 ~]# bash install_keepalived_v2.sh
...
请输入是主服务断或备用服务端，例如（MASTER或BACKUP）: BACKUP
请输入优先级，例如（100或80）: 80

1.4 安装harbor

这里使用"基于docker二进制包一键安装Harbor脚本"安装harbor，harbor的具体安装方法请参考博客“https://raymond.blog.csdn.net/article/details/135882947”。

[root@harbor01 ~]# cat install_harbor_http_v2_2.sh 
#!/bin/bash
#
#******************************************************************************************************************
#Author:        Raymond
#QQ:            88563128
#Date:          2024-01-26
#FileName:      install_harbor_http_v2_2.sh
#URL:           raymond.blog.csdn.net
#Description:   install_harbor_http for CentOS 7 & CentOS Stream 8/9 & Ubuntu 18.04/20.04/22.04 & Rocky 8/9
#Copyright (C): 2024 All rights reserved
#******************************************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'DOCKER_VERSION=24.0.7
DOCKER_MAIN_VERSION=`echo ${DOCKER_VERSION} | awk -F'.' '{print $1}'`
URL='mirrors.aliyun.com'# Docker Compose下载地址：“https://github.com/docker/compose/releases/download/v2.23.3/docker-compose-linux-x86_64”，请提前下载。
DOCKER_COMPOSE_FILE=docker-compose-linux-x86_64# Harbor下载地址：“https://github.com/goharbor/harbor/releases/download/v2.10.0/harbor-offline-installer-v2.10.0.tgz”，请提前下载。
HARBOR_FILE=harbor-offline-installer-v
HARBOR_VERSION=2.10.0
TAR=.tgz
HARBOR_INSTALL_DIR=/apps
HARBOR_DOMAIN=harbor.raymonds.cc
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
IP=`ip addr show ${NET_NAME}| awk -F" +|/" '/global/{print $3}'`
HARBOR_ADMIN_PASSWORD=123456os(){OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' /etc/os-release`
}check_file (){cd ${SRC_DIR}if [ ! -e ${DOCKER_COMPOSE_FILE} ];then${COLOR}"缺少${DOCKER_COMPOSE_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}exitelif [ ! -e ${HARBOR_FILE}${HARBOR_VERSION}${TAR} ];then${COLOR}"缺少${HARBOR_FILE}${HARBOR_VERSION}${TAR}文件,请把文件放到${SRC_DIR}目录下"${END}exitelse${COLOR}"相关文件已准备好"${END}fi
}ubuntu_install_docker(){${COLOR}"开始安装Docker依赖包，请稍等..."${END}apt update &> /dev/nullapt -y install apt-transport-https ca-certificates curl software-properties-common &> /dev/nullcurl -fsSL https://${URL}/docker-ce/linux/ubuntu/gpg | sudo apt-key add - &> /dev/nulladd-apt-repository -y "deb [arch=amd64] https://${URL}/docker-ce/linux/ubuntu  $(lsb_release -cs) stable" &> /dev/null apt update &> /dev/null${COLOR}"Docker有以下版本"${END}apt-cache madison docker-ce${COLOR}"10秒后即将安装:Docker-"${DOCKER_VERSION}"版本......"${END}${COLOR}"如果想安装其它Docker版本，请按Ctrl+c键退出，修改版本再执行"${END}sleep 10${COLOR}"开始安装Docker，请稍等..."${END}if [ ${DOCKER_MAIN_VERSION} == "18" -o ${DOCKER_MAIN_VERSION} == "19" -o ${DOCKER_MAIN_VERSION} == "20" ];thenapt -y install docker-ce=5:${DOCKER_VERSION}~3-0~ubuntu-$(lsb_release -cs) docker-ce-cli=5:${DOCKER_VERSION}~3-0~ubuntu-$(lsb_release -cs) &> /dev/null || { ${COLOR}"apt源失败，请检查apt配置"${END};exit; }elseapt -y install docker-ce=5:${DOCKER_VERSION}-1~ubuntu.$(lsb_release -rs)~$(lsb_release -cs) docker-ce-cli=5:${DOCKER_VERSION}-1~ubuntu.$(lsb_release -rs)~$(lsb_release -cs) &> /dev/null || { ${COLOR}"apt源失败，请检查apt配置"${END};exit; }fi
}centos_install_docker(){${COLOR}"开始安装Docker依赖包，请稍等..."${END}yum -y install yum-utils &> /dev/nullyum-config-manager --add-repo https://${URL}/docker-ce/linux/centos/docker-ce.repo &> /dev/nullyum clean all &> /dev/nullyum makecache &> /dev/null${COLOR}"Docker有以下版本"${END}yum list docker-ce.x86_64 --showduplicates${COLOR}"10秒后即将安装:Docker-"${DOCKER_VERSION}"版本......"${END}${COLOR}"如果想安装其它Docker版本，请按Ctrl+c键退出，修改版本再执行"${END}sleep 10${COLOR}"开始安装Docker，请稍等..."${END}yum -y install docker-ce-${DOCKER_VERSION} docker-ce-cli-${DOCKER_VERSION} &> /dev/null || { ${COLOR}"yum源失败，请检查yum配置"${END};exit; }
}mirror_accelerator(){mkdir -p /etc/dockercat > /etc/docker/daemon.json <<-EOF
{"registry-mirrors": ["https://registry.docker-cn.com","https://hub-mirror.c.163.com","https://docker.mirrors.ustc.edu.cn"],"insecure-registries": ["${HARBOR_DOMAIN}"],"data-root": "/data/docker","exec-opts": ["native.cgroupdriver=systemd"],"max-concurrent-downloads": 10,"max-concurrent-uploads": 5,"log-opts": {"max-size": "300m","max-file": "2"  },"live-restore": true
}
EOFsystemctl daemon-reloadsystemctl enable --now dockersystemctl is-active docker &> /dev/null && ${COLOR}"Docker 服务启动成功"${END} || { ${COLOR}"Docker 启动失败"${END};exit; }docker version &&  ${COLOR}"Docker 安装成功"${END} || ${COLOR}"Docker 安装失败"${END}
}set_alias(){echo 'alias rmi="docker images -qa|xargs docker rmi -f"' >> ~/.bashrcecho 'alias rmc="docker ps -qa|xargs docker rm -f"' >> ~/.bashrc
}install_docker_compose(){${COLOR}"开始安装Docker Compose，请稍等..."${END}mv ${SRC_DIR}/${DOCKER_COMPOSE_FILE} /usr/bin/docker-composechmod +x /usr/bin/docker-composedocker-compose --version &&  ${COLOR}"Docker Compose 安装完成"${END} || ${COLOR}"Docker compose 安装失败"${END}
}install_harbor(){${COLOR}"开始安装Harbor，请稍等..."${END}[ -d ${HARBOR_INSTALL_DIR} ] || mkdir ${HARBOR_INSTALL_DIR}tar xf ${SRC_DIR}/${HARBOR_FILE}${HARBOR_VERSION}${TAR} -C ${HARBOR_INSTALL_DIR}/mv ${HARBOR_INSTALL_DIR}/harbor/harbor.yml.tmpl ${HARBOR_INSTALL_DIR}/harbor/harbor.ymlsed -ri.bak -e 's/^(hostname:) .*/\1 '${IP}'/' -e 's/^(https:)/#\1/' -e 's/  (port: 443)/#  \1/' -e 's@  (certificate: .*)@#  \1@' -e 's@  (private_key: .*)@#  \1@' -e 's/^(harbor_admin_password:) .*/\1 '${HARBOR_ADMIN_PASSWORD}'/' ${HARBOR_INSTALL_DIR}/harbor/harbor.ymlif [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;thenrpm -q python3 &> /dev/null || { ${COLOR}"安装python3，请稍等..."${END};yum -y install python3 &> /dev/null; }elsedpkg -s python3 &>/dev/null || { ${COLOR}"安装python3，请稍等..."${END};apt -y install python3 &> /dev/null; }fi${HARBOR_INSTALL_DIR}/harbor/install.sh --with-trivy && ${COLOR}"Harbor 安装完成"${END} ||  ${COLOR}"Harbor 安装失败"${END}cat > /lib/systemd/system/harbor.service <<-EOF
[Unit]
Description=Harbor
After=docker.service systemd-networkd.service systemd-resolved.service
Requires=docker.service
Documentation=http://github.com/vmware/harbor[Service]
Type=simple
Restart=on-failure
RestartSec=5
ExecStart=/usr/bin/docker-compose -f ${HARBOR_INSTALL_DIR}/harbor/docker-compose.yml up
ExecStop=/usr/bin/docker-compose -f ${HARBOR_INSTALL_DIR}/harbor/docker-compose.yml down[Install]
WantedBy=multi-user.target
EOFsystemctl daemon-reload systemctl enable harbor &>/dev/null && ${COLOR}"Harbor已配置为开机自动启动"${END}
}set_swap_limit(){if [ ${OS_RELEASE_VERSION} == "18" -o ${OS_RELEASE_VERSION} == "20" ];thengrep -q "swapaccount=1" /etc/default/grub && { ${COLOR}'"WARNING: No swap limit support"警告,已设置'${END};exit; }${COLOR}'设置Docker的"WARNING: No swap limit support"警告'${END}sed -ri '/^GRUB_CMDLINE_LINUX=/s@"$@ swapaccount=1"@' /etc/default/grubupdate-grub &> /dev/null${COLOR}"10秒后，机器会自动重启"${END}sleep 10rebootfi
}main(){oscheck_fileif [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> /dev/null;thenrpm -q docker-ce &> /dev/null && ${COLOR}"Docker已安装"${END} || centos_install_dockerelsedpkg -s docker-ce &>/dev/null && ${COLOR}"Docker已安装"${END} || ubuntu_install_dockerfi[ -f /etc/docker/daemon.json ] &>/dev/null && ${COLOR}"Docker镜像加速器已设置"${END} || mirror_acceleratorgrep -Eqoi "(.*rmi=|.*rmc=)" ~/.bashrc && ${COLOR}"Docker别名已设置"${END} || set_alias[ -f /usr/bin/docker-compose ] && ${COLOR}"Docker Compose已安装"${END} || install_docker_composesystemctl is-active harbor &> /dev/null && ${COLOR}"Harbor已安装"${END} || install_harborset_swap_limit
}main# 分别在harbor01和harbor02执行安装
[root@harbor01 ~]# bash install_harbor_http_v2_2.sh[root@harbor02 ~]# bash install_harbor_http_v2_2.sh

1.5 创建harbor仓库

在harbor01新建项目google_containers。

http://172.31.3.106/

用户名：admin 密码:123456

t1-2

图1-2 登录harbor01

登录后，在“项目”下面选择“新建项目”。

t1-3

图1-3 在harbor01上新建项目

项目名称设置为“google_containers”，访问级别后面勾选“公开”，然后选“确认”。

t1-4

图1-4 在harbor01上创建google_containers项目

在harbor02新建项目google_containers

http://172.31.3.107/

用户名：admin 密码:123456

t1-5

图1-5 登录harbor02

登录后，在“项目”下面选择“新建项目”。

t1-6

图1-6 在harbor02上新建项目

项目名称设置为“google_containers”，访问级别后面勾选“公开”，然后选“确认”。

1-7

图1-7 在harbor01上创建google_containers项目

在harbor02上新建目标

在“系统管理”下面的“仓库管理”里面选择“新建目标”。

t1-8

图1-8 在harbor02上新建目标

提供者设置为“Harbor”，目标名设置为“google_containers”，目标URL设置为harbor01的地址“http://172.31.3.106”，访问ID设置为harbor01的用户名“admin”，访问密码设置为harbor01的密码“123456”，然后“测试连接”，测试成功后选择“确定”。

t1-9

图1-9 在harbor02上新建目标

在harbor02上新建规则

在“系统管理”下面的“复制管理”里面选择“新建规则”。

t1-10

图1-10 在harbor02上新建规则

名称设置为“google_containers”，目标仓库选择“google_containers-http://172.31.0.106”，触发模式设置为“事件驱动”，勾选“删除本地资源时同时也删除远程的资源 ”，然后选择“保存”。

t1-11

图1-11 在harbor02上新建规则

在harbor01上新建目标

在“系统管理”下面的“仓库管理”里面选择“新建目标”。

t1-12

图1-12 在harbor01上新建目标

提供者设置为“Harbor”，目标名设置为“google_containers”，目标URL设置为harbor01的地址“http://172.31.3.107”，访问ID设置为harbor01的用户名“admin”，访问密码设置为harbor01的密码“123456”，然后“测试连接”，测试成功后选择“确定”。

t1-13

图1-13 在harbor01上新建目标

在harbor01上新建规则

在“系统管理”下面的“复制管理”里面选择“新建规则”。

t1-14

图1-14 在harbor01上新建规则

名称设置为“google_containers”，目标仓库选择“google_containers-http://172.31.0.107”，触发模式设置为“事件驱动”，勾选“删除本地资源时同时也删除远程的资源 ”，然后选择“保存”。

t1-15

图1-15 在harbor01上新建规则

1.6 在docker客户端验证

在172.31.0.8的Rocky 8的主机上无需登录，即可下载镜像

首先要主机初始化和安装docker

[root@client ~]# cat >> /etc/hosts <<-EOF
172.31.3.188 harbor.raymonds.cc
EOF[root@client ~]# docker login harbor.raymonds.cc
Username: admin
Password: 
Error response from daemon: Get "https://harbor.raymonds.cc/v2/": dial tcp 172.31.3.188:443: connect: connection refuse
# 登录失败[root@client ~]# cat /etc/docker/daemon.json 
{"registry-mirrors": ["https://registry.docker-cn.com","https://hub-mirror.c.163.com","https://docker.mirrors.ustc.edu.cn"],"insecure-registries": ["harbor.raymonds.cc"], # 设置非安全的镜像仓库"data-root": "/data/docker","exec-opts": ["native.cgroupdriver=systemd"],"max-concurrent-downloads": 10,"max-concurrent-uploads": 5,"log-opts": {"max-size": "300m","max-file": "2"  },"live-restore": true
}[root@client ~]# systemctl daemon-reload && systemctl restart docker[root@client ~]# docker login harbor.raymonds.cc
Username: admin
Password: 
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-storeLogin Succeeded
# 现在登录成功了[root@client ~]# docker pull alpine[root@client ~]# docker images
REPOSITORY   TAG       IMAGE ID       CREATED      SIZE
alpine       latest    05455a08881e   3 days ago   7.38MB[root@client ~]# docker tag alpine harbor.raymonds.cc/google_containers/alpine[root@client ~]# docker images
REPOSITORY                                    TAG       IMAGE ID       CREATED      SIZE
alpine                                        latest    05455a08881e   3 days ago   7.38MB
harbor.raymonds.cc/google_containers/alpine   latest    05455a08881e   3 days ago   7.38MB[root@client ~]# docker push harbor.raymonds.cc/google_containers/alpine
Using default tag: latest
The push refers to repository [harbor.raymonds.cc/google_containers/alpine]
d4fc045c9e3a: Pushed 
latest: digest: sha256:6457d53fb065d6f250e1504b9bc42d5b6c65941d57532c072d929dd0628977d0 size: 528

在harbor01上查看镜像已经上传。

t1-16

图1-16 在harbor01上查看镜像上传情况

在harbor02上查看镜像已经上传。

t1-17

图1-17 在harbor02上查看镜像上传情况

从上面可以看出harbor01和harbor02镜像仓库是高可用的。

# 删除所有镜像
[root@client ~]# docker images -qa|xargs docker rmi -f[root@client ~]# docker images
REPOSITORY   TAG       IMAGE ID   CREATED   SIZE# 从harbor仓库拉取镜像
[root@client ~]# docker pull harbor.raymonds.cc/google_containers/alpine
Using default tag: latest
latest: Pulling from google_containers/alpine
4abcf2066143: Pull complete 
Digest: sha256:6457d53fb065d6f250e1504b9bc42d5b6c65941d57532c072d929dd0628977d0
Status: Downloaded newer image for harbor.raymonds.cc/google_containers/alpine:latest
harbor.raymonds.cc/google_containers/alpine:latest[root@client ~]# docker images
REPOSITORY                                    TAG       IMAGE ID       CREATED      SIZE
harbor.raymonds.cc/google_containers/alpine   latest    05455a08881e   3 days ago   7.38MB
# 可以看到harbor仓库的镜像也是可以拉取到本地的

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.rhkb.cn/news/282793.html

如若内容造成侵权/违法违规/事实不符，请联系长河编程网进行投诉反馈email:809451989@qq.com，一经查实，立即删除！

相关文章

Apipost智能Mock功能详解

Apipost智能Mock功能详解

在接口开发过程中&#xff0c;Mock功能可以帮助开发者快速测试和验证接口的正确性和稳定性&#xff0c;以便快速迭代和修复问题。Apipost推出智能Mock功能&#xff0c;可以在智能期望中填写一些触发条件&#xff0c;开启后&#xff0c;Apipost会根据已设置的触发条件&#xff0…
阅读更多...
新能源汽车小三电系统

新能源汽车小三电系统

小三电系统 新能源电动汽车的"小三电"系统&#xff0c;一般指车载充电机(OBC)、车载 DC/DC 变换器&#xff0c;和高压直流配电盒(PDU)。一辆纯电动汽车一般配备一台OBC 和一台车载 DC/DC 变换器。OBC将外部输入的交流电转化为直流电输出给电池&#xff0c;DC/DC衔接…
阅读更多...
Android studio开发中Virtual Device模拟器的设置和屏幕错位等问题

Android studio开发中Virtual Device模拟器的设置和屏幕错位等问题

Android SDK开发中Virtual Device模拟器的设置和使用 本文介绍android studio2023 3.1.13版本中模拟器的设置和在cordova开发中的运行方法 对于老版android studioAVD模拟器的使用&#xff0c;参见&#xff1a;Android SDK手机应用开发中第三方模拟器、真机运行方法以及AVD模拟…
阅读更多...
Linux下进程的调度与切换

Linux下进程的调度与切换

&#x1f30e;进程的调度与切换 文章目录&#xff1a; 进程的调度与切换 进程切换 进程调度       活动状态进程队列       位图判断       过期队列 总结 前言&#xff1a; 在Linux操作系统中&#xff0c;进程的调度与切换是操作系统核心功能之一&#xff…
阅读更多...
力扣题库27题移除元素（c语言）

力扣题库27题移除元素（c语言）

解法&#xff1a; int removeElement(int* nums, int numsSize, int val) {int src0,dst0;while(src<numsSize){if(nums[src]val){src;}else{nums[dst]nums[src];src;dst;}}return dst; }
阅读更多...
2024年NOC大赛创客智慧（西瓜创客）图形化编程真题模拟试卷包含答案

2024年NOC大赛创客智慧（西瓜创客）图形化编程真题模拟试卷包含答案

详细题目看顶部资源 答案解析 一、选择题 1、C 该段代码是将变量的值翻倍,运行之后变量的值是之前的两倍。变量的值是否改变取决于初始值是否为 0，所以船都不正确 2、C A 透项为让角色说话，不可以广播消息: B 选项为播放一段声音，不可以广播消息; C透项为广播消息，正确: …
阅读更多...
网络基础（一）初识

网络基础（一）初识

1、计算机网络背景 1.1、网络发展 1. 独立模式: 计算机之间相互独立&#xff1b; 2. 网络互联: 多台计算机连接在一起&#xff0c;完成数据共享&#xff1b; 3. 局域网LAN: 计算机数量更多了, 通过交换机和路由器连接在一起; 4. 广域网WAN: 将远隔千里的计算机都连在一起;…
阅读更多...
【MySQL】基本查询（1）

【MySQL】基本查询（1）

【MySQL】基本查询&#xff08;1&#xff09; 目录 【MySQL】基本查询&#xff08;1&#xff09;表的增删改查Create单行数据 全列插入多行数据 指定列插入插入否则更新替换 RetrieveSELECT 列全列查询指定列查询查询字段为表达式为查询结果指定别名结果去重 WHERE 条件英语不…
阅读更多...
Mysql---DML

Mysql---DML

文章目录 目录 一.DML概述 注入数据&#xff08; Insert&#xff09; 替换数据&#xff08;replace&#xff09; 删除数据 &#xff08;delete&#xff09; 修改数据 &#xff08;update&#xff09; 查询数据 &#xff08;select&#xff09; 二. 多表连接查询 内连接 子…
阅读更多...
计算机二级Python题目3

计算机二级Python题目3

题目来源&#xff1a;计算机二级Python半个月抱佛脚大法&#xff08;内呈上真题版&#xff09; - 知乎 目录 1. 基础题 1.1 基础题1 1.2 基础题2 1.3 基础题3 2. turtle绘图题 3. 大题 3.1 大题1 3.2 大题2 1. 基础题 1.1 基础题1 a,b,ceval(input()) ls[] for i in …
阅读更多...
视频桥接芯片#LT8912B适用于MIPIDSI转HDMI+LVDS应用方案，提供技术支持。

视频桥接芯片#LT8912B适用于MIPIDSI转HDMI+LVDS应用方案，提供技术支持。

1. 概述 Lontium LT8912B MIPI DSI 转 LVDS 和 HDMI 桥接器采用单通道 MIPI D-PHY 接收器前端配置&#xff0c;每通道 4 个数据通道&#xff0c;每个数据通道以 1.5Gbps 的速度运行&#xff0c;最大输入带宽高达 6Gbps。 对于屏幕应用&#xff0c;该桥接器可解码 MIPI DSI 18bp…
阅读更多...
docker安装Milvus

docker安装Milvus

docker安装Milvus 拉去CPU版本的milvus镜像 $ sudo docker pull milvusdb/milvus:0.10.0-cpu-d061620-5f3c00 docker pull milvusdb/milvus:0.10.0-cpu-d061620-5f3c00 mkdir -p milvus/conf cd milvus/conf ls wget https://raw.githubusercontent.com/milvus-io/milvus/v0.1…
阅读更多...
探索编程迷宫：选择你的职业赛道

探索编程迷宫：选择你的职业赛道

在现代科技的浪潮中&#xff0c;程序员的职业赛道就像是一座迷宫&#xff0c;充满着前端的美丽花园&#xff0c;后端的黑暗洞穴&#xff0c;以及数据科学的神秘密室。这个迷宫中&#xff0c;每一条通道都充满了挑战和机遇&#xff0c;而每一个行走其中的人都在寻找着属于自己的…
阅读更多...
用python爬取CSDN博客的总字数

用python爬取CSDN博客的总字数

一、下载pycahrm 此处推荐博客&#xff1a;PyCharm安装教程&#xff0c;图文教程&#xff08;超详细&#xff09;-CSDN博客 二、安装相应的库 pycharm安装库的步骤&#xff1a; 1、打开pycharm&#xff1b; 2、在菜单栏中&#xff0c;选择 "file">"setti…
阅读更多...
面向量产！基于视觉的速度距离估计

面向量产！基于视觉的速度距离估计

面向量产&#xff01;基于视觉的速度距离估计 论文名称&#xff1a;Vision-based Vehicle Speed Estimation: A Survey 导读 在精确检测车速车距的方案中&#xff0c;视觉方案是非常具有挑战性的&#xff0c;但由于没有昂贵的距离传感器而大幅降低成本&#xff0c;所以潜力巨…
阅读更多...
ByteTrack多目标跟踪——YOLOX详解

ByteTrack多目标跟踪——YOLOX详解

文章目录 1 before train1.1 dataset1.2 model 2 train2.1 Backbone2.2 PAFPN2.3 Head2.3.1 Decoupled Head2.3.2 anchor-free2.3.3 标签分配① 初步筛选② simOTA 2.3.4 Loss计算 项目地址&#xff1a; ByteTrack ByteTrack使用的检测器是YOLOX&#xff0c;是一个目前非常流行…
阅读更多...
【Review+预测】测试架构演进的曲折之路

【Review+预测】测试架构演进的曲折之路

文章目录 前言 一、“原始”阶段 二、“小打小闹”阶段 三、“小米加步枪”阶段 四、“摩托化部队”阶段 五、“骑兵连”阶段 六、“海军陆战队”阶段 七、“社区型组织”阶段 前言 近期公司的测试团队需要重新组织安排&#xff0c;本着谦虚谨慎的态度&#xff0c;我从…
阅读更多...
视频技术1：使用ABLMediaServer推流rtsp

视频技术1：使用ABLMediaServer推流rtsp

ABLMediaServer定位是高性能、高稳定、开箱即用、商用级别的流媒体服务器 下边展示了如何把1个mp3作为输入源&#xff0c;转换为rtsp流的过程。 作用&#xff1a;用rtsp模拟摄像头的视频流 1、启动ABLMediaServer ABLMediaServer-2024-03-13\WinX64\ABLMediaServer.exe 配…
阅读更多...
Redis中的缓存雪崩

Redis中的缓存雪崩

缓存雪崩 &#x1f914;现象分析 缓存雪崩是指在同一时段大量的缓存key同时失效或者缓存服务(Redis等)宕机&#xff0c;导致大量请求到达数据库&#xff0c;带来巨大压力。 &#x1f44a; 解决方案 利用Redis集群提高服务的可用性&#xff0c;避免缓存服务宕机给缓存业务添…
阅读更多...
流畅的 Python 第二版（GPT 重译）（十）

流畅的 Python 第二版（GPT 重译）（十）

第十八章&#xff1a;with、match 和 else 块 上下文管理器可能几乎与子例程本身一样重要。我们只是初步了解了它们。[…] Basic 有一个 with 语句&#xff0c;在许多语言中都有 with 语句。但它们的功能不同&#xff0c;它们都只是做一些非常浅显的事情&#xff0c;它们可以避…
阅读更多...
最新文章
推荐文章

Copyright @ 2022~2023