Jenkins构建时Jenkinsfile中的docker命令无法执行

使用Docker，Jenkins构建项目的时候，Jenkinsfile中的docker语句执行报如下错误：

[Pipeline] }
[Pipeline] // dir
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Create Docker Image)
[Pipeline] dir
Running in /Users/larry/.jenkins/workspace/docker-jenkins-pipeline/RpcServerSample
[Pipeline] {
[Pipeline] }
[Pipeline] // dir
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
groovy.lang.MissingPropertyException: No such property: docker for class: groovy.lang.Binding
    at groovy.lang.Binding.getVariable(Binding.java:63)
    at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onGetProperty(SandboxInterceptor.java:224)
    at org.kohsuke.groovy.sandbox.impl.Checker$4.call(Checker.java:241)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:238)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:221)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:221)
    at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:221)
    at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.getProperty(SandboxInvoker.java:24)
    at com.cloudbees.groovy.cps.impl.PropertyAccessBlock.rawGet(PropertyAccessBlock.java:20)
    at WorkflowScript.run(WorkflowScript:12)
    at ___cps.transform___(Native Method)
    at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.get(PropertyishBlock.java:74)
    at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
    at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.fixName(PropertyishBlock.java:66)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
    at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
    at com.cloudbees.groovy.cps.Next.step(Next.java:58)
    at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:154)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:33)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:30)
    at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
    at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:30)
    at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:163)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:324)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:78)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:236)
    at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:224)
    at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:63)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
    at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

其中Jenkinsfile内容如下：

node {
    checkout scm
    //env.PATH = "${tool 'Maven3'}/bin:${env.PATH}"
    stage('Package') {
        dir('RpcServerSample') {
            sh 'mvn clean package -DskipTests'
        }
    }

    stage('Create Docker Image') {
        dir('RpcServerSample') {
            docker.build("daocloud.io/suqun/docker-jenkins-pipeline:${env.BUILD_NUMBER}")
        }
    }

    stage ('Run Application') {
        try {
            // Start database container here
            // sh 'docker run -d --name db -p 8091-8093:8091-8093 -p 11210:11210 arungupta/oreilly-couchbase:latest'

            // Run application using Docker image
//            sh "DB=`docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' db`"
            sh "docker run -d -p 9001:9001 daocloud.io/suqun/docker-jenkins-pipeline:${env.BUILD_NUMBER}"

            // Run tests using Maven
            //dir ('webapp') {
            //  sh 'mvn exec:java -DskipTests'
            //}
        } catch (error) {
        } finally {
            // Stop and remove database container here
            //sh 'docker-compose stop db'
            //sh 'docker-compose rm db'
        }
    }

    stage('Run Tests') {
        try {
            dir('RpcServerSample') {
                sh "mvn test"
                docker.build("daocloud.io/suqun/docker-jenkins-pipeline:${env.BUILD_NUMBER}").push()
            }
        } catch (error) {

        } finally {
            junit '**/target/surefire-reports/*.xml'
        }
    }
}

报错语句是：docker.build("daocloud.io/suqun/docker-jenkins-pipeline:${env.BUILD_NUMBER}")

猜测是不是groovy的什么插件没装啊？