K8S学习之基础七十七：istio实现超时功能-EW帮帮网

istio实现超时功能

模拟客户端调用 nginx，nginx 将请求转发给 tomcat。nginx 服务设置了超时时间为2秒，如果超出这个时间就不在等待，返回超时错误。tomcat服务设置了响应时间延迟10秒，任何请求都需要等待10秒后才能返回。client 通过访问 nginx 服务去反向代理 tomcat服务，由于 tomcat服务需要10秒后才能返回，但nginx 服务只等待2秒，所以客户端会提示超时错误。

上传nginx、tomcat镜像到harbor
生成nginx、tomcat的pod和svc

vi nginx-deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx
  labels:
    server: nginx
    app: web
spec:
  replicas: 1
  selector:
    matchLabels:
      server: nginx
      app: web
  template:
    metadata:
      name: nginx
      labels: 
        server: nginx
        app: web
    spec:
      containers:
      - name: nginx
        image: 172.16.80.140/nginx/nginx:1.26
        imagePullPolicy: IfNotPresent

vi tomcat-deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat
  labels:
    server: tomcat
    app: web
spec:
  replicas: 1
  selector:
    matchLabels:
      server: tomcat
      app: web
  template:
    metadata:
      name: tomcat
      labels:
        server: tomcat
        app: web
    spec:
      containers:
      - name: tomcat
        image: 172.16.80.140/tomcat/tomcat-app:v1
        imagePullPolicy: IfNotPresent

vi nginx-tomcat-svc.yaml 
apiVersion: v1
kind: Service
metadata:
  name: nginx-svc
spec:
  selector:
    server: nginx
  ports:
  - name: http
    port: 80
    targetPort: 80
    protocol: TCP
---
apiVersion: v1
kind: Service
metadata:
  name: tomcat-svc
spec:
  selector:
    server: tomcat
  ports:
  - name: http
    port: 8080
    targetPort: 8080
    protocol: TCP

在这里插入图片描述

创建虚拟服务

vi virtual-tomcat.yaml 
apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: nginx-vs
spec:
  hosts:
  - nginx-svc
  http:
  - route:
    - destination:
        host: nginx-svc
    timeout: 2s               #  超时时间2s
---
apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: tomcat-vs
spec:
  hosts:
  - tomcat-svc
  http:
  - fault:
      delay:
        percentage:
          value: 100
        fixedDelay: 10s            # 响应时间10s
    route:
    - destination:
        host: tomcat-svc

设置nginx代理tomcat
由于nginx镜像没有vi等命令，无法修改代理文件，可通过在宿主机到pod取文件，修改文件，上传文件的方法

kubectl cp  nginx-94c5cd8d7-shj94:/etc/nginx/conf.d/default.conf default.conf -c nginx
vi default.conf
# 增加proxy_pass. proxy_http_version.  两行
    location / {
        # root   /usr/share/nginx/html;
        # index  index.html index.htm;
        proxy_pass http://tomcat-svc:8080;
        proxy_http_version 1.1;
kubectl cp ./default.conf nginx-94c5cd8d7-shj94:/etc/nginx/conf.d/default.conf -c nginx
kubectl exec -it nginx-94c5cd8d7-shj94 -c nginx -- /bin/bash
nginx -t
nginx -s reload

[root@mast01 timeout]# kubectl cp  nginx-94c5cd8d7-shj94:/etc/nginx/conf.d/default.conf default.conf -c nginx
tar: Removing leading `/' from member names
[root@mast01 timeout]# vi default.conf 
    listen       80;
    listen  [::]:80;
    server_name  localhost;

    #access_log  /var/log/nginx/host.access.log  main;

    location / {
        # root   /usr/share/nginx/html;
        # index  index.html index.htm;
        proxy_pass http://tomcat-svc:8080;
        proxy_http_version 1.1;
    }

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
"default.conf" 47L, 1172C written
[root@mast01 timeout]# 
[root@mast01 timeout]# kubectl cp ./default.conf nginx-94c5cd8d7-shj94:/etc/nginx/conf.d/default.conf -c nginx
[root@mast01 timeout]# kubectl exec -it nginx-94c5cd8d7-shj94 -c nginx -- /bin/bash
root@nginx-94c5cd8d7-shj94:/# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
root@nginx-94c5cd8d7-shj94:/# nginx -s reload
2025/04/09 08:50:51 [notice] 67#67: signal process started

在这里插入图片描述
超时测试：

kubectl run busybox --image 172.16.80.140/busybox/busybox:latest --restart=Never --rm -it busybox -- sh
time wget -q -O - http://nginx-svc

验证nginx-svc，2s就有返回结果，但是由于nginx-svc代理的tomcat-svc10s才有结果
在这里插入图片描述
验证tomcat-svc，10s才会有返回结果

/ # time wget -q -O - http://tomcat-svc:8080



<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <title>Apache Tomcat/8.0.35</title>
        <link href="favicon.ico" rel="icon" type="image/x-icon" />
        <link href="favicon.ico" rel="shortcut icon" type="image/x-icon" />
        <link href="tomcat.css" rel="stylesheet" type="text/css" />
    </head>

    <body>
        <div id="wrapper">
            <div id="navigation" class="curved container">
                <span id="nav-home"><a href="http://tomcat.apache.org/">Home</a></span>
                <span id="nav-hosts"><a href="/docs/">Documentation</a></span>
                <span id="nav-config"><a href="/docs/config/">Configuration</a></span>
                <span id="nav-examples"><a href="/examples/">Examples</a></span>
                <span id="nav-wiki"><a href="http://wiki.apache.org/tomcat/FrontPage">Wiki</a></span>
                <span id="nav-lists"><a href="http://tomcat.apache.org/lists.html">Mailing Lists</a></span>
                <span id="nav-help"><a href="http://tomcat.apache.org/findhelp.html">Find Help</a></span>
                <br class="separator" />
            </div>
            <div id="asf-box">
                <h1>Apache Tomcat/8.0.35</h1>
            </div>
            <div id="upper" class="curved container">
                <div id="congrats" class="curved container">
                    <h2>If you're seeing this, you've successfully installed Tomcat. Congratulations!</h2>
                </div>
                <div id="notice">
                    <img src="tomcat.png" alt="[tomcat logo]" />
                    <div id="tasks">
                        <h3>Recommended Reading:</h3>
                        <h4><a href="/docs/security-howto.html">Security Considerations HOW-TO</a></h4>
                        <h4><a href="/docs/manager-howto.html">Manager Application HOW-TO</a></h4>
                        <h4><a href="/docs/cluster-howto.html">Clustering/Session Replication HOW-TO</a></h4>
                    </div>
                </div>
                <div id="actions">
                    <div class="button">
                        <a class="container shadow" href="/manager/status"><span>Server Status</span></a>
                    </div>
                    <div class="button">
                        <a class="container shadow" href="/manager/html"><span>Manager App</span></a>
                    </div>
                    <div class="button">
                        <a class="container shadow" href="/host-manager/html"><span>Host Manager</span></a>
                    </div>
                </div>
                <!--
                <br class="separator" />
                -->
                <br class="separator" />
            </div>
            <div id="middle" class="curved container">
                <h3>Developer Quick Start</h3>
                <div class="col25">
                    <div class="container">
                        <p><a href="/docs/setup.html">Tomcat Setup</a></p>
                        <p><a href="/docs/appdev/">First Web Application</a></p>
                    </div>
                </div>
                <div class="col25">
                    <div class="container">
                        <p><a href="/docs/realm-howto.html">Realms &amp; AAA</a></p>
                        <p><a href="/docs/jndi-datasource-examples-howto.html">JDBC DataSources</a></p>
                    </div>
                </div>
                <div class="col25">
                    <div class="container">
                        <p><a href="/examples/">Examples</a></p>
                    </div>
                </div>
                <div class="col25">
                    <div class="container">
                        <p><a href="http://wiki.apache.org/tomcat/Specifications">Servlet Specifications</a></p>
                        <p><a href="http://wiki.apache.org/tomcat/TomcatVersions">Tomcat Versions</a></p>
                    </div>
                </div>
                <br class="separator" />
            </div>
            <div id="lower">
                <div id="low-manage" class="">
                    <div class="curved container">
                        <h3>Managing Tomcat</h3>
                        <p>For security, access to the <a href="/manager/html">manager webapp</a> is restricted.
                        Users are defined in:</p>
                        <pre>$CATALINA_HOME/conf/tomcat-users.xml</pre>
                        <p>In Tomcat 8.0 access to the manager application is split between
                           different users. &nbsp; <a href="/docs/manager-howto.html">Read more...</a></p>
                        <br />
                        <h4><a href="/docs/RELEASE-NOTES.txt">Release Notes</a></h4>
                        <h4><a href="/docs/changelog.html">Changelog</a></h4>
                        <h4><a href="http://tomcat.apache.org/migration.html">Migration Guide</a></h4>
                        <h4><a href="http://tomcat.apache.org/security.html">Security Notices</a></h4>
                    </div>
                </div>
                <div id="low-docs" class="">
                    <div class="curved container">
                        <h3>Documentation</h3>
                        <h4><a href="/docs/">Tomcat 8.0 Documentation</a></h4>
                        <h4><a href="/docs/config/">Tomcat 8.0 Configuration</a></h4>
                        <h4><a href="http://wiki.apache.org/tomcat/FrontPage">Tomcat Wiki</a></h4>
                        <p>Find additional important configuration information in:</p>
                        <pre>$CATALINA_HOME/RUNNING.txt</pre>
                        <p>Developers may be interested in:</p>
                        <ul>
                            <li><a href="http://tomcat.apache.org/bugreport.html">Tomcat 8.0 Bug Database</a></li>
                            <li><a href="/docs/api/index.html">Tomcat 8.0 JavaDocs</a></li>
                            <li><a href="http://svn.apache.org/repos/asf/tomcat/tc8.0.x/">Tomcat 8.0 SVN Repository</a></li>
                        </ul>
                    </div>
                </div>
                <div id="low-help" class="">
                    <div class="curved container">
                        <h3>Getting Help</h3>
                        <h4><a href="http://tomcat.apache.org/faq/">FAQ</a> and <a href="http://tomcat.apache.org/lists.html">Mailing Lists</a></h4>
                        <p>The following mailing lists are available:</p>
                        <ul>
                            <li id="list-announce"><strong><a href="http://tomcat.apache.org/lists.html#tomcat-announce">tomcat-announce</a><br />
                                Important announcements, releases, security vulnerability notifications. (Low volume).</strong>
                            </li>
                            <li><a href="http://tomcat.apache.org/lists.html#tomcat-users">tomcat-users</a><br />
                                User support and discussion
                            </li>
                            <li><a href="http://tomcat.apache.org/lists.html#taglibs-user">taglibs-user</a><br />
                                User support and discussion for <a href="http://tomcat.apache.org/taglibs/">Apache Taglibs</a>
                            </li>
                            <li><a href="http://tomcat.apache.org/lists.html#tomcat-dev">tomcat-dev</a><br />
                                Development mailing list, including commit messages
                            </li>
                        </ul>
                    </div>
                </div>
                <br class="separator" />
            </div>
            <div id="footer" class="curved container">
                <div class="col20">
                    <div class="container">
                        <h4>Other Downloads</h4>
                        <ul>
                            <li><a href="http://tomcat.apache.org/download-connectors.cgi">Tomcat Connectors</a></li>
                            <li><a href="http://tomcat.apache.org/download-native.cgi">Tomcat Native</a></li>
                            <li><a href="http://tomcat.apache.org/taglibs/">Taglibs</a></li>
                            <li><a href="/docs/deployer-howto.html">Deployer</a></li>
                        </ul>
                    </div>
                </div>
                <div class="col20">
                    <div class="container">
                        <h4>Other Documentation</h4>
                        <ul>
                            <li><a href="http://tomcat.apache.org/connectors-doc/">Tomcat Connectors</a></li>
                            <li><a href="http://tomcat.apache.org/connectors-doc/">mod_jk Documentation</a></li>
                            <li><a href="http://tomcat.apache.org/native-doc/">Tomcat Native</a></li>
                            <li><a href="/docs/deployer-howto.html">Deployer</a></li>
                        </ul>
                    </div>
                </div>
                <div class="col20">
                    <div class="container">
                        <h4>Get Involved</h4>
                        <ul>
                            <li><a href="http://tomcat.apache.org/getinvolved.html">Overview</a></li>
                            <li><a href="http://tomcat.apache.org/svn.html">SVN Repositories</a></li>
                            <li><a href="http://tomcat.apache.org/lists.html">Mailing Lists</a></li>
                            <li><a href="http://wiki.apache.org/tomcat/FrontPage">Wiki</a></li>
                        </ul>
                    </div>
                </div>
                <div class="col20">
                    <div class="container">
                        <h4>Miscellaneous</h4>
                        <ul>
                            <li><a href="http://tomcat.apache.org/contact.html">Contact</a></li>
                            <li><a href="http://tomcat.apache.org/legal.html">Legal</a></li>
                            <li><a href="http://www.apache.org/foundation/sponsorship.html">Sponsorship</a></li>
                            <li><a href="http://www.apache.org/foundation/thanks.html">Thanks</a></li>
                        </ul>
                    </div>
                </div>
                <div class="col20">
                    <div class="container">
                        <h4>Apache Software Foundation</h4>
                        <ul>
                            <li><a href="http://tomcat.apache.org/whoweare.html">Who We Are</a></li>
                            <li><a href="http://tomcat.apache.org/heritage.html">Heritage</a></li>
                            <li><a href="http://www.apache.org">Apache Home</a></li>
                            <li><a href="http://tomcat.apache.org/resources.html">Resources</a></li>
                        </ul>
                    </div>
                </div>
                <br class="separator" />
            </div>
            <p class="copyright">Copyright &copy;1999-2025 Apache Software Foundation.  All Rights Reserved</p>
        </div>
    </body>

</html>
real	0m 10.02s
user	0m 0.00s
sys	0m 0.00s

通过请求nginx-svc，nginx代理tomcat-svc，由于nginx是2s，但是tomcat返回是10s，所以提示超时了

K8S学习之基础七十七：istio实现超时功能

istio实现超时功能

网站公告

今日签到

热门文章

最新发布