本篇内容介绍了“怎么批量自动将Maven类型Job迁移到自由风格类型”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
近期进行 Jenkins 从1.X到2.X的升级演练
Jenkins2 最新版本只能在 JDK8 或 JDK11 版本下运行，我所使用的 JDK 版本为 JDK8
在构建 Maven Job，Job 配置的 JDK 版本为 JDK7时，构建报错
$ /usr/local/java/bin/java -cp /data/jenkins/maven31-agent.jar:/usr/local/maven/boot/plexus-classworlds-2.5.2.jar:/usr/local/maven/conf/logging jenkins.maven3.agent.Maven31Main /usr/local/maven /data/jenkins/slave.jar /data/jenkins/maven31-interceptor.jar /data/jenkins/maven3-interceptor-commons.jar 45631Exception in thread "main" java.lang.UnsupportedClassVersionError: hudson/remoting/Launcher : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:354) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClassFromSelf(ClassRealm.java:401) at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:42) at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247) at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239) at jenkins.maven3.agent.Maven31Main.main(Maven31Main.java:138) at jenkins.maven3.agent.Maven31Main.main(Maven31Main.java:67)
经定位，原来 Maven 类型 Job 与 JDK 版本有一定兼容性，部分说明如下：
Maven jobs and Java versions compatibility : Because java serialized classes are exchanged between Jenkins master and Maven Jobs it is required that the JVM used to launch Maven is superior or equal to the version of Java for which Jenkins Master is built for.
Jenkins >= 1.520 requires Java 6 thus Maven jobs must be launched with Java >= 6.
Jenkins >= 1.612 requires Java 7 thus Maven jobs must be launched with Java >= 7.
Jenkins >= 2.54 requires Java 8 thus Maven jobs must be launched with Java >= 8.
而我们的这些 Job 必须使用指定 JDK 版本构建，不能随意修改 JDK 版本
而自由风格类型的 Job，不会出现这个问题
所以，计划将 Maven 类型 Job 迁移到自由风格类型
那么如何迁移呢？
统计了下 Maven 类型的 Job，有数百个，手动迁移不现实的
尝试运行该脚本，可能与环境有关，它会报错
由于对 groovy 不太熟悉，解决起来比较麻烦
所以参考它的逻辑，使用 python 脚本实现了迁移的功能
python 脚本如下所示，有需要的可以自行修改：
# -*- coding:utf-8 -*-import xml.etree.ElementTree as ETimport sysfrom jenkinsapi.jenkins import Jenkins
reload(sys)
sys.setdefaultencoding('utf8')def get_jenkins_server():
JENKINS_URL = "http://127.0.0.1:8080/"
JENKINS_USERNAME = "jenkins"
JENKINS_PASSWORD = "jenkins"
return Jenkins(JENKINS_URL, username=JENKINS_USERNAME, password=JENKINS_PASSWORD, timeout=30)def get_modified_xml(job_config_xml_tree):
# create builders node
builders_element = ET.Element("builders")
job_config_xml_tree.append(builders_element) # Move prebuilders to builders
prebuilders_node = job_config_xml_tree.find("prebuilders") if prebuilders_node is not None and prebuilders_node.getchildren() is not None: for pre_builder in prebuilders_node.getchildren():
builders_element.append(pre_builder)
job_config_xml_tree.remove(prebuilders_node) # Create a maven block
maven_node = ET.Element("hudson.tasks.Maven")
builders_element.append(maven_node)
move(job_config_xml_tree.find("goals"), job_config_xml_tree, maven_node, "targets")
maven_name_node = job_config_xml_tree.find("mavenName") if maven_name_node:
move(maven_name_node, job_config_xml_tree, maven_node) else:
maven_name_node = ET.Element("mavenName")
maven_name_node.text = "Maven"
maven_node.append(maven_name_node)
move(job_config_xml_tree.find("rootPOM"), job_config_xml_tree, maven_node)
move(job_config_xml_tree.find("mavenOpts"), job_config_xml_tree, maven_node)
move(job_config_xml_tree.find("settings"), job_config_xml_tree, maven_node)
move(job_config_xml_tree.find("globalSettings"), job_config_xml_tree, maven_node) # items that don't exist in maven step:
remove(job_config_xml_tree, [ 'resolveDependencies', 'processPlugins', 'siteArchivingDisabled', 'archivingDisabled', 'mavenValidationLevel', 'disableTriggerDownstreamProjects', 'blockTriggerWhenBuilding', 'fingerprintingDisabled', 'incrementalBuild', 'processPlugins', 'siteArchivingDisabled', 'ignoreUpstremChanges', 'rootModule'
]) # Move postbuilders to builders
postbuilders_node = job_config_xml_tree.find("postbuilders") if postbuilders_node is not None and postbuilders_node.getchildren() is not None: for post_builder in postbuilders_node.getchildren():
builders_element.append(post_builder)
job_config_xml_tree.remove(postbuilders_node) # rename top-level element
# new parent node
new_job_config_xml_tree = ET.Element("project") for child_node in job_config_xml_tree.getchildren():
new_job_config_xml_tree.append(child_node) return new_job_config_xml_treedef move(from_node, from_parent_node, to_node, to_name=None):
if from_node is not None: if to_name:
tmp_element_node = ET.Element(to_name)
tmp_element_node.text = from_node.text
tmp_element_node.attrib = from_node.attrib
to_node.append(tmp_element_node)
from_parent_node.remove(from_node) else:
to_node.append(from_node)
from_parent_node.remove(from_node)def remove(from_node, name_list):
for name in name_list:
tmp_node = from_node.find(name) if tmp_node is not None:
from_node.remove(tmp_node)def main():
jenkins_server = get_jenkins_server()
job_list = jenkins_server.get_jobs_list() for job_name in job_list: if not job_name.endswith("-DEPRECATED"):
job_obj = jenkins_server.get_job(job_name)
config_text = job_obj.get_config()
config_xml_tree = ET.fromstring(config_text) if config_xml_tree.tag == "maven2-moduleset":
new_config_xml_tree = get_modified_xml(config_xml_tree)
new_config_xml = ET.tostring(new_config_xml_tree)
jenkins_server.rename_job(job_name, job_name + "-DEPRECATED")
jenkins_server.create_job(job_name, new_config_xml)
print("migrate job from Maven Type to FreeStyle Type: " + job_name)if __name__ == "__main__":
main()“怎么批量自动将Maven类型Job迁移到自由风格类型”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注创新互联-成都网站建设公司网站，小编将为大家输出更多高质量的实用文章！
