452 lines
15 KiB
Go
452 lines
15 KiB
Go
package seedjobs
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import (
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"context"
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"crypto/sha256"
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"encoding/base64"
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"fmt"
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"reflect"
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"text/template"
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"github.com/jenkinsci/kubernetes-operator/internal/render"
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"github.com/jenkinsci/kubernetes-operator/pkg/apis/jenkins/v1alpha2"
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jenkinsclient "github.com/jenkinsci/kubernetes-operator/pkg/controller/jenkins/client"
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"github.com/jenkinsci/kubernetes-operator/pkg/controller/jenkins/configuration/base/resources"
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"github.com/jenkinsci/kubernetes-operator/pkg/controller/jenkins/constants"
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"github.com/jenkinsci/kubernetes-operator/pkg/controller/jenkins/groovy"
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"github.com/go-logr/logr"
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stackerr "github.com/pkg/errors"
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apps "k8s.io/api/apps/v1"
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appsv1 "k8s.io/api/apps/v1"
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corev1 "k8s.io/api/core/v1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"sigs.k8s.io/controller-runtime/pkg/client"
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k8s "sigs.k8s.io/controller-runtime/pkg/client"
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)
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const (
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// UsernameSecretKey is username data key in Kubernetes secret used to create Jenkins username/password credential
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UsernameSecretKey = "username"
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// PasswordSecretKey is password data key in Kubernetes secret used to create Jenkins username/password credential
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PasswordSecretKey = "password"
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// PrivateKeySecretKey is private key data key in Kubernetes secret used to create Jenkins SSH credential
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PrivateKeySecretKey = "privateKey"
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// JenkinsCredentialTypeLabelName is label for kubernetes-credentials-provider-plugin which determine Jenkins
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// credential type
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JenkinsCredentialTypeLabelName = "jenkins.io/credentials-type"
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// AgentName is the name of seed job agent
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AgentName = "seed-job-agent"
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creatingGroovyScriptName = "seed-job-groovy-script.groovy"
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)
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var seedJobGroovyScriptTemplate = template.Must(template.New(creatingGroovyScriptName).Parse(`
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import hudson.model.FreeStyleProject;
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import hudson.plugins.git.GitSCM;
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import hudson.plugins.git.BranchSpec;
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import hudson.triggers.SCMTrigger;
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import hudson.triggers.TimerTrigger;
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import hudson.util.Secret;
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import javaposse.jobdsl.plugin.*;
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import jenkins.model.Jenkins;
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import jenkins.model.JenkinsLocationConfiguration;
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import com.cloudbees.plugins.credentials.CredentialsScope;
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import com.cloudbees.plugins.credentials.domains.Domain;
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import com.cloudbees.plugins.credentials.SystemCredentialsProvider;
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import jenkins.model.JenkinsLocationConfiguration;
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import org.jenkinsci.plugins.workflow.job.WorkflowJob;
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import org.jenkinsci.plugins.workflow.cps.CpsScmFlowDefinition;
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{{ if .GitHubPushTrigger }}
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import com.cloudbees.jenkins.GitHubPushTrigger;
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{{ end }}
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import hudson.model.FreeStyleProject;
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import hudson.model.labels.LabelAtom;
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import hudson.plugins.git.BranchSpec;
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import hudson.plugins.git.GitSCM;
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import hudson.plugins.git.SubmoduleConfig;
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import hudson.plugins.git.extensions.impl.CloneOption;
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import javaposse.jobdsl.plugin.ExecuteDslScripts;
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import javaposse.jobdsl.plugin.LookupStrategy;
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import javaposse.jobdsl.plugin.RemovedJobAction;
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import javaposse.jobdsl.plugin.RemovedViewAction;
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import static com.google.common.collect.Lists.newArrayList;
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Jenkins jenkins = Jenkins.instance
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def jobDslSeedName = "{{ .ID }}-{{ .SeedJobSuffix }}";
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def jobRef = jenkins.getItem(jobDslSeedName)
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def repoList = GitSCM.createRepoList("{{ .RepositoryURL }}", "{{ .CredentialID }}")
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def gitExtensions = [new CloneOption(true, true, ";", 10)]
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def scm = new GitSCM(
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repoList,
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newArrayList(new BranchSpec("{{ .RepositoryBranch }}")),
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false,
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Collections.<SubmoduleConfig>emptyList(),
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null,
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null,
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gitExtensions
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)
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def executeDslScripts = new ExecuteDslScripts()
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executeDslScripts.setTargets("{{ .Targets }}")
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executeDslScripts.setSandbox(false)
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executeDslScripts.setRemovedJobAction(RemovedJobAction.DELETE)
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executeDslScripts.setRemovedViewAction(RemovedViewAction.DELETE)
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executeDslScripts.setLookupStrategy(LookupStrategy.SEED_JOB)
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executeDslScripts.setAdditionalClasspath("{{ .AdditionalClasspath }}")
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executeDslScripts.setFailOnMissingPlugin({{ .FailOnMissingPlugin }})
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executeDslScripts.setUnstableOnDeprecation({{ .UnstableOnDeprecation }})
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executeDslScripts.setIgnoreMissingFiles({{ .IgnoreMissingFiles }})
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if (jobRef == null) {
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jobRef = jenkins.createProject(FreeStyleProject, jobDslSeedName)
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}
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jobRef.getBuildersList().clear()
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jobRef.getBuildersList().add(executeDslScripts)
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jobRef.setDisplayName("Seed Job from {{ .ID }}")
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jobRef.setScm(scm)
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{{ if .PollSCM }}
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jobRef.addTrigger(new SCMTrigger("{{ .PollSCM }}"))
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{{ end }}
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{{ if .GitHubPushTrigger }}
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jobRef.addTrigger(new GitHubPushTrigger())
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{{ end }}
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{{ if .BuildPeriodically }}
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jobRef.addTrigger(new TimerTrigger("{{ .BuildPeriodically }}"))
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{{ end}}
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jobRef.setAssignedLabel(new LabelAtom("{{ .AgentName }}"))
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jenkins.getQueue().schedule(jobRef)
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`))
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// SeedJobs defines API for configuring and ensuring Jenkins Seed Jobs and Deploy Keys
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type SeedJobs struct {
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jenkinsClient jenkinsclient.Jenkins
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k8sClient k8s.Client
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logger logr.Logger
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}
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// New creates SeedJobs object
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func New(jenkinsClient jenkinsclient.Jenkins, k8sClient k8s.Client, logger logr.Logger) *SeedJobs {
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return &SeedJobs{
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jenkinsClient: jenkinsClient,
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k8sClient: k8sClient,
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logger: logger,
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}
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}
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// EnsureSeedJobs configures seed job and runs it for every entry from Jenkins.Spec.SeedJobs
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func (s *SeedJobs) EnsureSeedJobs(jenkins *v1alpha2.Jenkins) (done bool, err error) {
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if s.isRecreatePodNeeded(*jenkins) {
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s.logger.Info("Some seed job has been deleted, recreating pod")
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return false, s.restartJenkinsMasterPod(*jenkins)
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}
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if len(jenkins.Spec.SeedJobs) > 0 {
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err := s.createAgent(s.jenkinsClient, s.k8sClient, jenkins, jenkins.Namespace, AgentName)
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if err != nil {
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return false, err
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}
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} else if len(jenkins.Spec.SeedJobs) == 0 {
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err := s.k8sClient.Delete(context.TODO(), &appsv1.Deployment{
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ObjectMeta: metav1.ObjectMeta{
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Namespace: jenkins.Namespace,
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Name: agentDeploymentName(*jenkins, AgentName),
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},
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})
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if err != nil && !apierrors.IsNotFound(err) {
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return false, stackerr.WithStack(err)
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}
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}
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if err = s.ensureLabelsForSecrets(*jenkins); err != nil {
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return false, err
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}
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requeue, err := s.createJobs(jenkins)
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if err != nil {
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return false, err
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}
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if requeue {
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return false, nil
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}
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seedJobIDs := s.getAllSeedJobIDs(*jenkins)
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if done && !reflect.DeepEqual(seedJobIDs, jenkins.Status.CreatedSeedJobs) {
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jenkins.Status.CreatedSeedJobs = seedJobIDs
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return false, stackerr.WithStack(s.k8sClient.Update(context.TODO(), jenkins))
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}
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return true, nil
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}
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// createJob is responsible for creating jenkins job which configures jenkins seed jobs and deploy keys
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func (s *SeedJobs) createJobs(jenkins *v1alpha2.Jenkins) (requeue bool, err error) {
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groovyClient := groovy.New(s.jenkinsClient, s.k8sClient, s.logger, jenkins, "seed-jobs", jenkins.Spec.GroovyScripts.Customization)
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for _, seedJob := range jenkins.Spec.SeedJobs {
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credentialValue, err := s.credentialValue(jenkins.Namespace, seedJob)
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if err != nil {
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return true, err
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}
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groovyScript, err := seedJobCreatingGroovyScript(seedJob)
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if err != nil {
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return true, err
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}
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hash := sha256.New()
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hash.Write([]byte(groovyScript))
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hash.Write([]byte(credentialValue))
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requeue, err := groovyClient.EnsureSingle(seedJob.ID, fmt.Sprintf("%s.groovy", seedJob.ID), base64.URLEncoding.EncodeToString(hash.Sum(nil)), groovyScript)
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if err != nil {
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return true, err
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}
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if requeue {
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return true, nil
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}
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}
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return false, nil
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}
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// ensureLabelsForSecrets adds labels to Kubernetes secrets where are Jenkins credentials used for seed jobs,
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// thanks to them kubernetes-credentials-provider-plugin will create Jenkins credentials in Jenkins and
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// Operator will able to watch any changes made to them
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func (s *SeedJobs) ensureLabelsForSecrets(jenkins v1alpha2.Jenkins) error {
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for _, seedJob := range jenkins.Spec.SeedJobs {
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if seedJob.JenkinsCredentialType == v1alpha2.BasicSSHCredentialType || seedJob.JenkinsCredentialType == v1alpha2.UsernamePasswordCredentialType {
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requiredLabels := resources.BuildLabelsForWatchedResources(jenkins)
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requiredLabels[JenkinsCredentialTypeLabelName] = string(seedJob.JenkinsCredentialType)
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secret := &corev1.Secret{}
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namespaceName := types.NamespacedName{Namespace: jenkins.ObjectMeta.Namespace, Name: seedJob.CredentialID}
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err := s.k8sClient.Get(context.TODO(), namespaceName, secret)
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if err != nil {
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return stackerr.WithStack(err)
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}
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if !resources.VerifyIfLabelsAreSet(secret, requiredLabels) {
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secret.ObjectMeta.Labels = requiredLabels
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if err = s.k8sClient.Update(context.TODO(), secret); err != nil {
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return stackerr.WithStack(err)
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}
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}
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}
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}
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return nil
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}
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func (s *SeedJobs) credentialValue(namespace string, seedJob v1alpha2.SeedJob) (string, error) {
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if seedJob.JenkinsCredentialType == v1alpha2.BasicSSHCredentialType || seedJob.JenkinsCredentialType == v1alpha2.UsernamePasswordCredentialType {
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secret := &corev1.Secret{}
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namespaceName := types.NamespacedName{Namespace: namespace, Name: seedJob.CredentialID}
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err := s.k8sClient.Get(context.TODO(), namespaceName, secret)
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if err != nil {
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return "", stackerr.WithStack(err)
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}
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if seedJob.JenkinsCredentialType == v1alpha2.BasicSSHCredentialType {
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return string(secret.Data[PrivateKeySecretKey]), nil
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}
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return string(secret.Data[UsernameSecretKey]) + string(secret.Data[PasswordSecretKey]), nil
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}
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return "", nil
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}
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func (s *SeedJobs) getAllSeedJobIDs(jenkins v1alpha2.Jenkins) []string {
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var ids []string
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for _, seedJob := range jenkins.Spec.SeedJobs {
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ids = append(ids, seedJob.ID)
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}
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return ids
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}
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//TODO move to k8sClient
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func (s *SeedJobs) getJenkinsMasterPod(jenkins v1alpha2.Jenkins) (*corev1.Pod, error) {
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jenkinsMasterPodName := resources.GetJenkinsMasterPodName(jenkins)
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currentJenkinsMasterPod := &corev1.Pod{}
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err := s.k8sClient.Get(context.TODO(), types.NamespacedName{Name: jenkinsMasterPodName, Namespace: jenkins.Namespace}, currentJenkinsMasterPod)
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if err != nil {
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return nil, err // don't wrap error
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}
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return currentJenkinsMasterPod, nil
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}
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//TODO move to k8sClient
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func (s *SeedJobs) restartJenkinsMasterPod(jenkins v1alpha2.Jenkins) error {
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currentJenkinsMasterPod, err := s.getJenkinsMasterPod(jenkins)
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if err != nil {
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return err
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}
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s.logger.Info(fmt.Sprintf("Terminating Jenkins Master Pod %s/%s", currentJenkinsMasterPod.Namespace, currentJenkinsMasterPod.Name))
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return stackerr.WithStack(s.k8sClient.Delete(context.TODO(), currentJenkinsMasterPod))
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}
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func (s *SeedJobs) isRecreatePodNeeded(jenkins v1alpha2.Jenkins) bool {
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for _, createdSeedJob := range jenkins.Status.CreatedSeedJobs {
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found := false
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for _, seedJob := range jenkins.Spec.SeedJobs {
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if createdSeedJob == seedJob.ID {
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found = true
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break
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}
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}
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if !found {
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return true
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}
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}
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return false
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}
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// createAgent deploys Jenkins agent to Kubernetes cluster
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func (s SeedJobs) createAgent(jenkinsClient jenkinsclient.Jenkins, k8sClient client.Client, jenkinsManifest *v1alpha2.Jenkins, namespace string, agentName string) error {
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_, err := jenkinsClient.GetNode(agentName)
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// Create node if not exists
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if err != nil && err.Error() == "No node found" {
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_, err = jenkinsClient.CreateNode(agentName, 1, "The jenkins-operator generated agent", "/home/jenkins", agentName)
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if err != nil {
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return stackerr.WithStack(err)
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}
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} else if err != nil {
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return stackerr.WithStack(err)
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}
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secret, err := jenkinsClient.GetNodeSecret(agentName)
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if err != nil {
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return err
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}
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deployment := agentDeployment(jenkinsManifest, namespace, agentName, secret)
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err = k8sClient.Create(context.TODO(), deployment)
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if apierrors.IsAlreadyExists(err) {
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err := k8sClient.Update(context.TODO(), deployment)
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if err != nil {
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return stackerr.WithStack(err)
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}
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} else if err != nil {
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return stackerr.WithStack(err)
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}
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return nil
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}
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func agentDeploymentName(jenkins v1alpha2.Jenkins, agentName string) string {
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return fmt.Sprintf("%s-%s", agentName, jenkins.Name)
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}
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func agentDeployment(jenkins *v1alpha2.Jenkins, namespace string, agentName string, secret string) *apps.Deployment {
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return &apps.Deployment{
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ObjectMeta: metav1.ObjectMeta{
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Name: agentDeploymentName(*jenkins, agentName),
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Namespace: namespace,
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},
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Spec: apps.DeploymentSpec{
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Template: corev1.PodTemplateSpec{
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Spec: corev1.PodSpec{
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Containers: []corev1.Container{
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{
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Name: "jnlp",
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Image: "jenkins/jnlp-slave:alpine",
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Env: []corev1.EnvVar{
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{
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Name: "JENKINS_TUNNEL",
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Value: fmt.Sprintf("%s.%s:%d",
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resources.GetJenkinsSlavesServiceName(jenkins),
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jenkins.ObjectMeta.Namespace,
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jenkins.Spec.SlaveService.Port),
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},
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{
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Name: "JENKINS_SECRET",
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Value: secret,
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},
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{
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Name: "JENKINS_AGENT_NAME",
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Value: agentName,
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},
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{
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Name: "JENKINS_URL",
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Value: fmt.Sprintf("http://%s.%s:%d",
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resources.GetJenkinsHTTPServiceName(jenkins),
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jenkins.ObjectMeta.Namespace,
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jenkins.Spec.Service.Port,
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),
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},
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{
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Name: "JENKINS_AGENT_WORKDIR",
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Value: "/home/jenkins/agent",
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},
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},
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},
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},
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},
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ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{
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"app": fmt.Sprintf("%s-selector", agentName),
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},
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},
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},
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Selector: &metav1.LabelSelector{
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MatchLabels: map[string]string{
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"app": fmt.Sprintf("%s-selector", agentName),
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},
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},
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},
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}
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}
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func seedJobCreatingGroovyScript(seedJob v1alpha2.SeedJob) (string, error) {
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data := struct {
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ID string
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CredentialID string
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Targets string
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RepositoryBranch string
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RepositoryURL string
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GitHubPushTrigger bool
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BuildPeriodically string
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PollSCM string
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IgnoreMissingFiles bool
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AdditionalClasspath string
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FailOnMissingPlugin bool
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UnstableOnDeprecation bool
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SeedJobSuffix string
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AgentName string
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}{
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ID: seedJob.ID,
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CredentialID: seedJob.CredentialID,
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Targets: seedJob.Targets,
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RepositoryBranch: seedJob.RepositoryBranch,
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RepositoryURL: seedJob.RepositoryURL,
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GitHubPushTrigger: seedJob.GitHubPushTrigger,
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BuildPeriodically: seedJob.BuildPeriodically,
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PollSCM: seedJob.PollSCM,
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IgnoreMissingFiles: seedJob.IgnoreMissingFiles,
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AdditionalClasspath: seedJob.AdditionalClasspath,
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FailOnMissingPlugin: seedJob.FailOnMissingPlugin,
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UnstableOnDeprecation: seedJob.UnstableOnDeprecation,
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SeedJobSuffix: constants.SeedJobSuffix,
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AgentName: AgentName,
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}
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output, err := render.Render(seedJobGroovyScriptTemplate, data)
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if err != nil {
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return "", err
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}
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return output, nil
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}
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