依赖
Jenkins 的运行需要 Java 环境 ，yum install jenkins 并不检查并且强制要求 java 已经正确安装，正常安装完jenkins并不代表其可以正常运行，使用下面的方式来确认当前环境下java的版本
[root@h101 ~]# java -version
java version "1.7.0_65"
OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)
[root@h101 ~]# Note: To further make things difficult for CentOS users, the default CentOS version of Java is not compatible with Jenkins. Jenkins typically works best with a Sun implementation of Java, which is not included in CentOS for licensing reasons
CentOS 版本的java 与Jenkins并不兼容
代码语言：javascript复制java -version
java version "1.5.0"
gij (GNU libgcj) version 4.4.6 20110731 (Red Hat 4.4.6-3)EPEL仓库里提供的OpenJDK 可以很好的支持Jenkins
代码语言：javascript复制java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (rhel-2.5.5.1.el6_6-x86_64 u79-b14)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)如果出现java的相关报错，可以先尝试找找java版本的原因
防火墙
代码语言：javascript复制[root@h101 ~]# vim /etc/sysconfig/iptables
[root@h101 ~]# grep 8080 /etc/sysconfig/iptables
-A INPUT -p tcp -m state --state NEW -m tcp --dport 8080 -j ACCEPT
[root@h101 ~]# /etc/init.d/iptables reload
iptables: Trying to reload firewall rules: [ OK ]
[root@h101 ~]# iptables -L -nv | grep 8080
0 0 ACCEPT tcp -- * * 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:8080
[root@h101 ~]# 默认情况下Jenkins监听在8080端口，所以要打开此端口，否则服务将无法访问
