nginx探活
server 192.168.4.20:9090 weight=1; server 192.168.3.20:9090 weight=1; check interval=2000 rise=3 fall=3 timeout=1000 type=http; check_http_send "GET /healthcheck HTTP/1.0\r\n\r\n"; check_http_expect_alive http_2xx http_3xx;
Spring boot健康检查
@Controller public class HealthController { private static ApplicationHome home = new ApplicationHome(Application.class); private static Path path = Path.of(home.getDir() + "/healthcheck.html"); @RequestMapping("/healthcheck") public void health(HttpServletRequest request, HttpServletResponse response) throws IOException { OutputStream os = response.getOutputStream(); if (Files.exists(path.toAbsolutePath())) { response.setStatus(200); os.write("up".getBytes(StandardCharsets.UTF_8)); response.flushBuffer(); } else { os.write("down".getBytes(StandardCharsets.UTF_8)); response.setStatus(500); } } }
Jenkins 配置
pipeline { agent any tools { jdk 'jdk13' maven 'mvn3.6.3' } environment { backup_time='$(date +%Y%m%d-%H%M%S)' p_name='edu-chat-1.0-SNAPSHOT.jar' aws_dir='/data/work/chatservice/' w_dir='/data/jenkins/workspace/${JOB_NAME}/chat/target/' } stages { stage('拉取代码') { steps { deleteDir() git branch: 'dev_add_healthcheck_20210622_congsl', credentialsId: 'f2874221-e912-4949-8646-ca450254799f', url: 'git@github.com:pplingo/chatservice.git' } } stage('安装依赖&&构建项目') { steps { sh """ echo "---> 安装依赖&&构建项目" mvn -v java -version mvn clean install """ } } stage('发布') { steps { sh """ echo "---> 发布java_c_api" #ansible awsbackend1$num -m shell -a 'cp -rp ${env.aws_dir}${env.p_name} ${env.aws_dir}${env.p_name}-${env.backup_time}' #已经存在/data/work/chatservice/healthcheck.html 文件,拉取代码后删除此文件,程序检测文件不存在将后端请求设置为非200,300。Tengine将后端服务端口设为Down,不会在向后端服务器转发请求,这时候可也进行Update。 ansible awsbackend1$num -m shell -a 'rm -rf /data/work/chatservice/healthcheck.html' #休眠6秒,Tengine检测后端超时时间 sleep 6 echo "---> 已将后端java端口设为down" ansible awsbackend1$num -m copy -a 'src=${env.w_dir}${p_name} dest=${env.aws_dir} owner=centos group=centos force=yes' ansible awsbackend1$num -m shell -a 'unlink ${env.aws_dir}edu-chat.jar' ansible awsbackend1$num -b -m shell -a 'ln -sf ${env.aws_dir}edu-chat-1.0-SNAPSHOT.jar ${env.aws_dir}edu-chat.jar' ansible awsbackend1$num -b -m shell -a 'supervisorctl restart edu-chat' echo "---> 服务已重启,休眠17秒" #服务重启,休眠17秒,保证服务重启。 sleep 17 #服务重启后,进行创建文件,Tengine会将端口重新转发到后端服务器。 ansible awsbackend1$num -m shell -a 'touch /data/work/chatservice/healthcheck.html' """ } } } }
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