当 jenkins.war 未运行时，Jenkins 未运行

Question

我正在尝试为我正在从事的 selenium/maven 项目自动安排 Jenkins 作业。 一切运行正常且自动调度仅在 .jar 文件运行时有效（使用命令： java -jar jenkins.war --httpPort=8089 ） 但是，一旦我退出命令提示符和 Jenkins 服务器，它就根本不会运行。 我假设它应该运行，无论是否连接以及计算机正在登录或注销。

在我看来，当 jenkins.war 文件未启动和运行时，Jenkins 自动调度不起作用。

我在这里错过了什么吗？

Answer 1

如果未执行.war文件，则整个jenkins进程不会运行。 问题是你如何运行 Jenkins。

有大量文档如何运行它。 但是，我最终通过system.d服务文件在启用systemd的操作系统（linux）上运行： /usr/lib/systemd/system/jenkins.service ：

[Unit]
Description=Jenkins
Documentation=https://wiki.jenkins.io/display/JENKINS/Use+Jenkins
After=network.target
Requires=network.target

[Service]
Type=simple
EnvironmentFile=/etc/default/jenkins
ExecStart=/home/jenkins/jdk/jdk1.8.0_121/bin/java -Xmx2048m -Xms1024m -DJENKINS_HOME=/home/jenkins -jar /home/jenkins/jenkins.war --javaHome=/home/jenkins/jdk/jdk1.8.0_121 --httpPort=8080 --webroot=/var/cache/jenkins/war --ajp13Port=-1 --debug=5 --handlerCountMax=100 --handlerCountMaxIdle=20
# Restart=always
# RestartSec=120
User=jenkins

[Install]
WantedBy=multi-user.target

与： /etc/default/jenkins ：

# Managed manually
JENKINS_HOME="/home/jenkins"
#JENKINS_LOGFILE="/home/jenkins/jenkins.log"

# TODO: manage JAVA_HOME through java-alternatives
JAVA_HOME="/home/jenkins/jdk/jdk1.8.0_121"
JAVA_OPTIONS="-Xmx2048m -Xms1024m"

# Web Configuration
HTTP_WEB_ROOT="/var/cache/jenkins/war"
HTTP_PORT="8080"
HTTP_LISTEN_ADDRESS="0.0.0.0"

# Jenkins Configurations
#   more: https://wiki.jenkins.io/display/JENKINS/Starting+and+Accessing+Jenkins
JENKINS_ARGS="--ajp13Port=-1 --debug=5 --handlerCountMax=100 --handlerCountMaxIdle=20"

$ systemctl status jenkins
● jenkins.service - Jenkins
   Loaded: loaded (/usr/lib/systemd/system/jenkins.service; linked; vendor preset: disabled)
   Active: active (running) since Wed 2021-03-31 10:08:36 EDT; 1 weeks 1 days ago
     Docs: https://wiki.jenkins.io/display/JENKINS/Use+Jenkins
 Main PID: 27219 (java)
    Tasks: 70 (limit: 512)
   CGroup: /system.slice/jenkins.service
           └─27219 /home/jenkins/jdk/jdk1.8.0_121/bin/java -Xmx2048m -Xms1024m

并通过Apache HTTP服务器发布，通过ProxyPath：

$ systemctl status apache
● apache2.service - The Apache Webserver
   Loaded: loaded (/usr/lib/systemd/system/apache2.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2021-02-02 12:34:05 EST; 2 months 4 days ago
  Process: 30426 ExecReload=/usr/sbin/start_apache2 -DSYSTEMD -DFOREGROUND -k graceful (code=exited, status=0/SUCCESS)
 Main PID: 18524 (httpd-prefork)
   Status: "Total requests: 0; Current requests/sec: 0; Current traffic:   0 B/sec"
    Tasks: 11
   CGroup: /system.slice/apache2.service

使用 Apache HTTP 虚拟主机配置：

<IfDefine SSL>
<IfDefine !NOSSL>

##
## SSL Virtual Host Context
##

<VirtualHost _default_:443>

  ProxyPass         /  http://localhost:8080/ nocanon
  ProxyPassReverse  /  http://localhost:8080/

  # ProxyRequests     Off
  ProxyPreserveHost On
  AllowEncodedSlashes NoDecode

  <Proxy http://localhost:8080/*>
    Require all granted
  </Proxy>

  # ProxyPassMatch  ^/(?\!.well-known)  http://localhost:8080 nocanon

  ErrorLog /var/log/apache2/error_log
  TransferLog /var/log/apache2/access_log

  #   SSL Engine Switch:
  #   Enable/Disable SSL for this virtual host.
  SSLEngine on

  #   You can use per vhost certificates if SNI is supported.
  SSLCertificateFile /etc/apache2/ssl.crt/<your-server>.com.crt
  SSLCertificateKeyFile /etc/apache2/ssl.key/<your-server>.com.key

  CustomLog /var/log/apache2/ssl_request_log   ssl_combined

</VirtualHost>

</IfDefine>
</IfDefine>

相同的配置设置，但通过 NGINX: Jenkins 反向代理配置 nginx

通过这种方式，您可以管理您的 jenkins 服务器（启动/停止）并管理 TLS (SSL) 通信：

systemctl status jenkins nginx

If you run Jenkins through Docker, you don't need another WebServer (eg Apache/NGINX) in front of Jenkins as publicly, you're not going to expose the Jenkins Docker container, but you probably have a Kubernetes/(A)LB在前。 不建议公开 Jenkins。

WebServer 使您可以灵活地在 Jenkins 前面使用缓存或 CDN，尤其是在您使用发布工件功能时。