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+## 配置jenkins插件mirror
+1: 修改  $JENKINS_HOME/hudson.model.UpdateCenter.xml
+
+```
+<?xml version='1.1' encoding='UTF-8'?>
+<sites>
+<site>
+<id>default</id>
+<url>https://updates.jenkins-zh.cn/update-center.json</url>
+</site>　　
+```
+
+2: 下载证书到 $JENKINS_HOME/war/WEB-INF/update-center-rootCAs/
+
+wget  https://raw.githubusercontent.com/jenkins-zh/mirror-adapter/master/rootCA/mirror-adapter.crt 
+
+删除插件缓存$JENKINS_HOME/updates
+
+镜像和为什么下载证书，到https://community.jenkins-zh.cn 学习