k8s 构建jenkinsslave

k8s-构建jenkins-slave

1. 编写 jenkins-slave配置文件

• 编写jenkins-slave的dockerfile文件

  FROM centos:7
  LABEL maintainer jenkins-slave
  
  RUN yum install -y java-1.8.0-openjdk maven curl git libtool-ltdl-devel && \ 
      yum clean all && \
      rm -rf /var/cache/yum/* && \
      mkdir -p /usr/share/jenkins
  
  COPY slave.jar /usr/share/jenkins/slave.jar  
  COPY jenkins-slave /usr/bin/jenkins-slave
  COPY settings.xml /etc/maven/settings.xml
  RUN chmod +x /usr/bin/jenkins-slave
  
  ENTRYPOINT ["jenkins-slave"]
  
  

• 编写jenkins-slave的启动脚本

  #!/usr/bin/env sh
  
  if [ $# -eq 1 ]; then
  
  	# if `docker run` only has one arguments, we assume user is running alternate command like `bash` to inspect the image
  	exec "$@"
  
  else
  
  	# if -tunnel is not provided try env vars
  	case "$@" in
  		*"-tunnel "*) ;;
  		*)
  		if [ ! -z "$JENKINS_TUNNEL" ]; then
  			TUNNEL="-tunnel $JENKINS_TUNNEL"
  		fi ;;
  	esac
  
  	# if -workDir is not provided try env vars
  	if [ ! -z "$JENKINS_AGENT_WORKDIR" ]; then
  		case "$@" in
  			*"-workDir"*) echo "Warning: Work directory is defined twice in command-line arguments and the environment variable" ;;
  			*)
  			WORKDIR="-workDir $JENKINS_AGENT_WORKDIR" ;;
  		esac
  	fi
  
  	if [ -n "$JENKINS_URL" ]; then
  		URL="-url $JENKINS_URL"
  	fi
  
  	if [ -n "$JENKINS_NAME" ]; then
  		JENKINS_AGENT_NAME="$JENKINS_NAME"
  	fi  
  
  	if [ -z "$JNLP_PROTOCOL_OPTS" ]; then
  		echo "Warning: JnlpProtocol3 is disabled by default, use JNLP_PROTOCOL_OPTS to alter the behavior"
  		JNLP_PROTOCOL_OPTS="-Dorg.jenkinsci.remoting.engine.JnlpProtocol3.disabled=true"
  	fi
  
  	# If both required options are defined, do not pass the parameters
  	OPT_JENKINS_SECRET=""
  	if [ -n "$JENKINS_SECRET" ]; then
  		case "$@" in
  			*"${JENKINS_SECRET}"*) echo "Warning: SECRET is defined twice in command-line arguments and the environment variable" ;;
  			*)
  			OPT_JENKINS_SECRET="${JENKINS_SECRET}" ;;
  		esac
  	fi
  	
  	OPT_JENKINS_AGENT_NAME=""
  	if [ -n "$JENKINS_AGENT_NAME" ]; then
  		case "$@" in
  			*"${JENKINS_AGENT_NAME}"*) echo "Warning: AGENT_NAME is defined twice in command-line arguments and the environment variable" ;;
  			*)
  			OPT_JENKINS_AGENT_NAME="${JENKINS_AGENT_NAME}" ;;
  		esac
  	fi
  
  	#TODO: Handle the case when the command-line and Environment variable contain different values.
  	#It is fine it blows up for now since it should lead to an error anyway.
  
  	exec java $JAVA_OPTS $JNLP_PROTOCOL_OPTS -cp /usr/share/jenkins/slave.jar hudson.remoting.jnlp.Main -headless $TUNNEL $URL $WORKDIR $OPT_JENKINS_SECRET $OPT_JENKINS_AGENT_NAME "$@"
  fi
  
  

• jenkins-slave的配置文件settings.xml

  <?xml version="1.0" encoding="UTF-8"?>
  
  <!--
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an
  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  KIND, either express or implied.  See the License for the
  specific language governing permissions and limitations
  under the License.
  -->
  
  <!--
   | This is the configuration file for Maven. It can be specified at two levels:
   |
   |  1. User Level. This settings.xml file provides configuration for a single user,
   |                 and is normally provided in ${user.home}/.m2/settings.xml.
   |
   |                 NOTE: This location can be overridden with the CLI option:
   |
   |                 -s /path/to/user/settings.xml
   |
   |  2. Global Level. This settings.xml file provides configuration for all Maven
   |                 users on a machine (assuming they're all using the same Maven
   |                 installation). It's normally provided in
   |                 ${maven.conf}/settings.xml.
   |
   |                 NOTE: This location can be overridden with the CLI option:
   |
   |                 -gs /path/to/global/settings.xml
   |
   | The sections in this sample file are intended to give you a running start at
   | getting the most out of your Maven installation. Where appropriate, the default
   | values (values used when the setting is not specified) are provided.
   |
   |-->
  <settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
    <!-- localRepository
     | The path to the local repository maven will use to store artifacts.
     |
     | Default: ${user.home}/.m2/repository
    <localRepository>/path/to/local/repo</localRepository>
    -->
  
    <!-- interactiveMode
     | This will determine whether maven prompts you when it needs input. If set to false,
     | maven will use a sensible default value, perhaps based on some other setting, for
     | the parameter in question.
     |
     | Default: true
    <interactiveMode>true</interactiveMode>
    -->
  
    <!-- offline
     | Determines whether maven should attempt to connect to the network when executing a build.
     | This will have an effect on artifact downloads, artifact deployment, and others.
     |
     | Default: false
    <offline>false</offline>
    -->
  
    <!-- pluginGroups
     | This is a list of additional group identifiers that will be searched when resolving plugins by their prefix, i.e.
     | when invoking a command line like "mvn prefix:goal". Maven will automatically add the group identifiers
     | "org.apache.maven.plugins" and "org.codehaus.mojo" if these are not already contained in the list.
     |-->
    <pluginGroups>
      <!-- pluginGroup
       | Specifies a further group identifier to use for plugin lookup.
      <pluginGroup>com.your.plugins</pluginGroup>
      -->
    </pluginGroups>
  
    <!-- proxies
     | This is a list of proxies which can be used on this machine to connect to the network.
     | Unless otherwise specified (by system property or command-line switch), the first proxy
     | specification in this list marked as active will be used.
     |-->
    <proxies>
      <!-- proxy
       | Specification for one proxy, to be used in connecting to the network.
       |
      <proxy>
        <id>optional</id>
        <active>true</active>
        <protocol>http</protocol>
        <username>proxyuser</username>
        <password>proxypass</password>
        <host>proxy.host.net</host>
        <port>80</port>
        <nonProxyHosts>local.net|some.host.com</nonProxyHosts>
      </proxy>
      -->
    </proxies>
  
    <!-- servers
     | This is a list of authentication profiles, keyed by the server-id used within the system.
     | Authentication profiles can be used whenever maven must make a connection to a remote server.
     |-->
    <servers>
      <!-- server
       | Specifies the authentication information to use when connecting to a particular server, identified by
       | a unique name within the system (referred to by the 'id' attribute below).
       |
       | NOTE: You should either specify username/password OR privateKey/passphrase, since these pairings are
       |       used together.
       |
      <server>
        <id>deploymentRepo</id>
        <username>repouser</username>
        <password>repopwd</password>
      </server>
      -->
  
      <!-- Another sample, using keys to authenticate.
      <server>
        <id>siteServer</id>
        <privateKey>/path/to/private/key</privateKey>
        <passphrase>optional; leave empty if not used.</passphrase>
      </server>
      -->
    </servers>
  
    <!-- mirrors
     | This is a list of mirrors to be used in downloading artifacts from remote repositories.
     |
     | It works like this: a POM may declare a repository to use in resolving certain artifacts.
     | However, this repository may have problems with heavy traffic at times, so people have mirrored
     | it to several places.
     |
     | That repository definition will have a unique id, so we can create a mirror reference for that
     | repository, to be used as an alternate download site. The mirror site will be the preferred
     | server for that repository.
     |-->
    <mirrors>
      <!-- mirror
       | Specifies a repository mirror site to use instead of a given repository. The repository that
       | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
       | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
       |
      <mirror>
        <id>mirrorId</id>
        <mirrorOf>repositoryId</mirrorOf>
        <name>Human Readable Name for this Mirror.</name>
        <url>http://my.repository.com/repo/path</url>
      </mirror>
       -->
      <mirror>     
        <id>central</id>     
        <mirrorOf>central</mirrorOf>     
        <name>aliyun maven</name>
        <url>https://maven.aliyun.com/repository/public</url>     
      </mirror>
    </mirrors>
  
    <!-- profiles
     | This is a list of profiles which can be activated in a variety of ways, and which can modify
     | the build process. Profiles provided in the settings.xml are intended to provide local machine-
     | specific paths and repository locations which allow the build to work in the local environment.
     |
     | For example, if you have an integration testing plugin - like cactus - that needs to know where
     | your Tomcat instance is installed, you can provide a variable here such that the variable is
     | dereferenced during the build process to configure the cactus plugin.
     |
     | As noted above, profiles can be activated in a variety of ways. One way - the activeProfiles
     | section of this document (settings.xml) - will be discussed later. Another way essentially
     | relies on the detection of a system property, either matching a particular value for the property,
     | or merely testing its existence. Profiles can also be activated by JDK version prefix, where a
     | value of '1.4' might activate a profile when the build is executed on a JDK version of '1.4.2_07'.
     | Finally, the list of active profiles can be specified directly from the command line.
     |
     | NOTE: For profiles defined in the settings.xml, you are restricted to specifying only artifact
     |       repositories, plugin repositories, and free-form properties to be used as configuration
     |       variables for plugins in the POM.
     |
     |-->
    <profiles>
      <!-- profile
       | Specifies a set of introductions to the build process, to be activated using one or more of the
       | mechanisms described above. For inheritance purposes, and to activate profiles via <activatedProfiles/>
       | or the command line, profiles have to have an ID that is unique.
       |
       | An encouraged best practice for profile identification is to use a consistent naming convention
       | for profiles, such as 'env-dev', 'env-test', 'env-production', 'user-jdcasey', 'user-brett', etc.
       | This will make it more intuitive to understand what the set of introduced profiles is attempting
       | to accomplish, particularly when you only have a list of profile id's for debug.
       |
       | This profile example uses the JDK version to trigger activation, and provides a JDK-specific repo.
      <profile>
        <id>jdk-1.4</id>
  
        <activation>
          <jdk>1.4</jdk>
        </activation>
  
        <repositories>
          <repository>
            <id>jdk14</id>
            <name>Repository for JDK 1.4 builds</name>
            <url>http://www.myhost.com/maven/jdk14</url>
            <layout>default</layout>
            <snapshotPolicy>always</snapshotPolicy>
          </repository>
        </repositories>
      </profile>
      -->
  
      <!--
       | Here is another profile, activated by the system property 'target-env' with a value of 'dev',
       | which provides a specific path to the Tomcat instance. To use this, your plugin configuration
       | might hypothetically look like:
       |
       | ...
       | <plugin>
       |   <groupId>org.myco.myplugins</groupId>
       |   <artifactId>myplugin</artifactId>
       |
       |   <configuration>
       |     <tomcatLocation>${tomcatPath}</tomcatLocation>
       |   </configuration>
       | </plugin>
       | ...
       |
       | NOTE: If you just wanted to inject this configuration whenever someone set 'target-env' to
       |       anything, you could just leave off the <value/> inside the activation-property.
       |
      <profile>
        <id>env-dev</id>
  
        <activation>
          <property>
            <name>target-env</name>
            <value>dev</value>
          </property>
        </activation>
  
        <properties>
          <tomcatPath>/path/to/tomcat/instance</tomcatPath>
        </properties>
      </profile>
      -->
    </profiles>
  
    <!-- activeProfiles
     | List of profiles that are active for all builds.
     |
    <activeProfiles>
      <activeProfile>alwaysActiveProfile</activeProfile>
      <activeProfile>anotherAlwaysActiveProfile</activeProfile>
    </activeProfiles>
    -->
  </settings>
  
  

• 下载slave的包

2. 使用docker build构建镜像

• 执行构建命令

  root@k8s-master jenkins-slave]# docker build -t harbor.scajy.org/library/jenkins-slave:1.8 .
  

• 执行私有仓库登陆

  [root@k8s-master jenkins-slave]# docker login -u admin -p'Aa123456' harbor.scajy.org
  

• 查询镜像

  [root@k8s-master jenkins-slave]# docker images
  REPOSITORY                                                        TAG       IMAGE ID       CREATED         SIZE
  harbor.scajy.org/library/jenkins-slave                            1.8       804b32f7129d   2 minutes ago   545MB
  

• 推送镜像到harbor仓库

  [root@k8s-master jenkins-slave]# docker push harbor.scajy.org/library/jenkins-slave:1.8
  The push refers to repository [harbor.scajy.org/library/jenkins-slave]
  b828e93cff2e: Pushed 
  5c72c602436a: Pushed 
  719b9a6ac7c9: Pushed 
  d5abbc8a828f: Pushed 
  33f56046d363: Pushed 
  174f56854903: Pushed 
  1.8: digest: sha256:798282e72962a18984d3468eac8a29f7524670a2713617348226838c0d13c442 size: 1574
  

• 验证镜像上传是否成功