forked from argoproj/argo-workflows
/
install.go
601 lines (574 loc) · 19.8 KB
/
install.go
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package commands
import (
"fmt"
"reflect"
"strconv"
"time"
"github.com/argoproj/argo"
"github.com/argoproj/argo/errors"
"github.com/argoproj/argo/pkg/apis/workflow"
wfv1 "github.com/argoproj/argo/pkg/apis/workflow/v1alpha1"
"github.com/argoproj/argo/workflow/common"
"github.com/argoproj/argo/workflow/controller"
"github.com/ghodss/yaml"
goversion "github.com/hashicorp/go-version"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
appsv1beta2 "k8s.io/api/apps/v1beta2"
apiv1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
apiextensionsclient "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
apierr "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
)
var (
// These values may be overridden by the link flags during build
// (e.g. imageTag will use the official release tag on tagged builds)
imageNamespace = "argoproj"
imageTag = "latest"
// These are the default image names which `argo install` uses during install
DefaultControllerImage = imageNamespace + "/workflow-controller:" + imageTag
DefaultExecutorImage = imageNamespace + "/argoexec:" + imageTag
DefaultUiImage = imageNamespace + "/argoui:" + imageTag
)
func init() {
RootCmd.AddCommand(installCmd)
installCmd.Flags().BoolVar(&installArgs.Upgrade, "upgrade", false, "upgrade controller/ui deployments and configmap if already installed")
installCmd.Flags().BoolVar(&installArgs.DryRun, "dry-run", false, "print the kubernetes manifests to stdout instead of installing")
installCmd.Flags().StringVar(&installArgs.Namespace, "install-namespace", common.DefaultControllerNamespace, "install into a specific Namespace")
installCmd.Flags().StringVar(&installArgs.InstanceID, "instanceid", "", "optional instance id to use for the controller (for multi-controller environments)")
installCmd.Flags().StringVar(&installArgs.ConfigMap, "configmap", common.DefaultConfigMapName(common.DefaultControllerDeploymentName), "install controller using preconfigured configmap")
installCmd.Flags().StringVar(&installArgs.ControllerName, "controller-name", common.DefaultControllerDeploymentName, "name of controller deployment")
installCmd.Flags().StringVar(&installArgs.ControllerImage, "controller-image", DefaultControllerImage, "use a specified controller image")
installCmd.Flags().StringVar(&installArgs.ServiceAccount, "service-account", "", "use a specified service account for the workflow-controller deployment")
installCmd.Flags().StringVar(&installArgs.ExecutorImage, "executor-image", DefaultExecutorImage, "use a specified executor image")
installCmd.Flags().StringVar(&installArgs.UIName, "ui-name", ArgoUIDeploymentName, "name of ui deployment")
installCmd.Flags().StringVar(&installArgs.UIImage, "ui-image", DefaultUiImage, "use a specified ui image")
installCmd.Flags().StringVar(&installArgs.UIServiceAccount, "ui-service-account", "", "use a specified service account for the argo-ui deployment")
installCmd.Flags().BoolVar(&installArgs.EnableWebConsole, "enable-web-console", false, "allows exec access into running step container using Argo UI")
}
// InstallFlags has all the required parameters for installing Argo.
type InstallFlags struct {
Upgrade bool // --upgrade
DryRun bool // --dry-run
Namespace string // --install-namespace
InstanceID string // --instanceid
ConfigMap string // --configmap
ControllerName string // --controller-name
ControllerImage string // --controller-image
ServiceAccount string // --service-account
ExecutorImage string // --executor-image
UIName string // --ui-name
UIImage string // --ui-image
UIServiceAccount string // --ui-service-account
EnableWebConsole bool // --enable-web-console
}
var installArgs InstallFlags
var installCmd = &cobra.Command{
Use: "install",
Short: "install Argo",
Run: install,
}
func printYAML(obj interface{}) {
objBytes, err := yaml.Marshal(obj)
if err != nil {
log.Fatalf("Failed to marshal %v", obj)
}
fmt.Printf("---\n%s\n", string(objBytes))
}
// Install installs the Argo controller and UI in the given Namespace
func Install(cmd *cobra.Command, args InstallFlags) {
clientset = initKubeClient()
if !args.DryRun {
fmt.Printf("Installing Argo %s into namespace '%s'\n", argo.GetVersion(), args.Namespace)
kubernetesVersionCheck(clientset)
}
installCRD(clientset, args)
if args.ServiceAccount == "" && clusterAdminExists(clientset) {
createServiceAccount(clientset, ArgoControllerServiceAccount, args)
createClusterRole(clientset, ArgoControllerClusterRole, ArgoControllerPolicyRules, args)
createClusterRoleBinding(clientset, ArgoControllerClusterRoleBinding, ArgoControllerServiceAccount, ArgoControllerClusterRole, args)
args.ServiceAccount = ArgoControllerServiceAccount
}
if args.UIServiceAccount == "" && clusterAdminExists(clientset) {
createServiceAccount(clientset, ArgoUIServiceAccount, args)
createClusterRole(clientset, ArgoUIClusterRole, ArgoUIPolicyRules, args)
createClusterRoleBinding(clientset, ArgoUIClusterRoleBinding, ArgoUIServiceAccount, ArgoUIClusterRole, args)
args.UIServiceAccount = ArgoUIServiceAccount
}
installConfigMap(clientset, args)
installController(clientset, args)
installUI(clientset, args)
installUIService(clientset, args)
}
func install(cmd *cobra.Command, args []string) {
Install(cmd, installArgs)
}
func clusterAdminExists(clientset *kubernetes.Clientset) bool {
// TODO: change this method to check if RBAC is enabled
clusterRoles := clientset.RbacV1().ClusterRoles()
_, err := clusterRoles.Get("cluster-admin", metav1.GetOptions{})
if err != nil {
if apierr.IsNotFound(err) {
return false
}
log.Fatalf("Failed to lookup 'cluster-admin' role: %v", err)
}
return true
}
func createServiceAccount(clientset *kubernetes.Clientset, serviceAccountName string, args InstallFlags) {
serviceAccount := apiv1.ServiceAccount{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ServiceAccount",
},
ObjectMeta: metav1.ObjectMeta{
Name: serviceAccountName,
Namespace: args.Namespace,
},
}
if args.DryRun {
printYAML(serviceAccount)
return
}
_, err := clientset.CoreV1().ServiceAccounts(args.Namespace).Create(&serviceAccount)
if err != nil {
if !apierr.IsAlreadyExists(err) {
log.Fatalf("Failed to create service account '%s': %v\n", serviceAccountName, err)
}
fmt.Printf("ServiceAccount '%s' already exists\n", serviceAccountName)
return
}
fmt.Printf("ServiceAccount '%s' created\n", serviceAccountName)
}
func createClusterRole(clientset *kubernetes.Clientset, clusterRoleName string, rules []rbacv1.PolicyRule, args InstallFlags) {
clusterRole := rbacv1.ClusterRole{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ClusterRole",
},
ObjectMeta: metav1.ObjectMeta{
Name: clusterRoleName,
},
Rules: rules,
}
if args.DryRun {
printYAML(clusterRole)
return
}
crclient := clientset.RbacV1().ClusterRoles()
_, err := crclient.Create(&clusterRole)
if err != nil {
if !apierr.IsAlreadyExists(err) {
log.Fatalf("Failed to create ClusterRole '%s': %v\n", clusterRoleName, err)
}
existingClusterRole, err := crclient.Get(clusterRoleName, metav1.GetOptions{})
if err != nil {
log.Fatalf("Failed to get ClusterRole '%s': %v\n", clusterRoleName, err)
}
if !reflect.DeepEqual(existingClusterRole.Rules, clusterRole.Rules) {
if !args.Upgrade {
log.Fatalf("ClusterRole '%s' requires upgrade. Rerun with --upgrade to update the configuration", clusterRoleName)
}
_, err = crclient.Update(&clusterRole)
if err != nil {
log.Fatalf("Failed to update ClusterRole '%s': %v\n", clusterRoleName, err)
}
fmt.Printf("ClusterRole '%s' updated\n", clusterRoleName)
} else {
fmt.Printf("Existing ClusterRole '%s' up-to-date\n", clusterRoleName)
}
} else {
fmt.Printf("ClusterRole '%s' created\n", clusterRoleName)
}
}
func createClusterRoleBinding(clientset *kubernetes.Clientset, clusterBindingRoleName, serviceAccountName, clusterRoleName string, args InstallFlags) {
roleBinding := rbacv1.ClusterRoleBinding{
TypeMeta: metav1.TypeMeta{
APIVersion: "rbac.authorization.k8s.io/v1beta1",
Kind: "ClusterRoleBinding",
},
ObjectMeta: metav1.ObjectMeta{
Name: clusterBindingRoleName,
},
RoleRef: rbacv1.RoleRef{
APIGroup: "rbac.authorization.k8s.io",
Kind: "ClusterRole",
Name: clusterRoleName,
},
Subjects: []rbacv1.Subject{
{
Kind: rbacv1.ServiceAccountKind,
Name: serviceAccountName,
Namespace: args.Namespace,
},
},
}
if args.DryRun {
printYAML(roleBinding)
return
}
_, err := clientset.RbacV1().ClusterRoleBindings().Create(&roleBinding)
if err != nil {
if !apierr.IsAlreadyExists(err) {
log.Fatalf("Failed to create ClusterRoleBinding %s: %v\n", clusterBindingRoleName, err)
}
fmt.Printf("ClusterRoleBinding '%s' already exists\n", clusterBindingRoleName)
return
}
fmt.Printf("ClusterRoleBinding '%s' created, bound '%s' to '%s'\n", clusterBindingRoleName, serviceAccountName, clusterRoleName)
}
func kubernetesVersionCheck(clientset *kubernetes.Clientset) {
// Check if the Kubernetes version is >= 1.8
versionInfo, err := clientset.ServerVersion()
if err != nil {
log.Fatalf("Failed to get Kubernetes version: %v", err)
}
serverVersion, err := goversion.NewVersion(versionInfo.String())
if err != nil {
log.Fatalf("Failed to create version: %v", err)
}
minVersion, err := goversion.NewVersion("1.8")
if err != nil {
log.Fatalf("Failed to create minimum version: %v", err)
}
if serverVersion.LessThan(minVersion) {
log.Fatalf("Server version %v < %v. Installation won't proceed...\n", serverVersion, minVersion)
}
fmt.Printf("Proceeding with Kubernetes version %v\n", serverVersion)
}
func installConfigMap(clientset *kubernetes.Clientset, args InstallFlags) {
cmClient := clientset.CoreV1().ConfigMaps(args.Namespace)
wfConfig := controller.WorkflowControllerConfig{
ExecutorImage: args.ExecutorImage,
InstanceID: args.InstanceID,
}
configBytes, err := yaml.Marshal(wfConfig)
if err != nil {
log.Fatalf("%+v", errors.InternalWrapError(err))
}
wfConfigMap := apiv1.ConfigMap{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ConfigMap",
},
ObjectMeta: metav1.ObjectMeta{
Name: args.ConfigMap,
Namespace: args.Namespace,
},
Data: map[string]string{
common.WorkflowControllerConfigMapKey: string(configBytes),
},
}
if args.DryRun {
printYAML(wfConfigMap)
return
}
_, err = cmClient.Create(&wfConfigMap)
if err != nil {
if !apierr.IsAlreadyExists(err) {
log.Fatalf("Failed to create ConfigMap '%s' in namespace '%s': %v", args.ConfigMap, args.Namespace, err)
}
// Configmap already exists. Check if existing configmap needs an update to a new executor image
existingCM, err := cmClient.Get(args.ConfigMap, metav1.GetOptions{})
if err != nil {
log.Fatalf("Failed to retrieve ConfigMap '%s' in namespace '%s': %v", args.ConfigMap, args.Namespace, err)
}
configStr, ok := existingCM.Data[common.WorkflowControllerConfigMapKey]
if !ok {
log.Fatalf("ConfigMap '%s' missing key '%s'", args.ConfigMap, common.WorkflowControllerConfigMapKey)
}
var existingConfig controller.WorkflowControllerConfig
err = yaml.Unmarshal([]byte(configStr), &existingConfig)
if err != nil {
log.Fatalf("Failed to load controller configuration: %v", err)
}
if existingConfig.ExecutorImage == wfConfig.ExecutorImage {
fmt.Printf("Existing ConfigMap '%s' up-to-date\n", args.ConfigMap)
return
}
if !args.Upgrade {
log.Fatalf("ConfigMap '%s' requires upgrade. Rerun with --upgrade to update the configuration", args.ConfigMap)
}
existingConfig.ExecutorImage = args.ExecutorImage
configBytes, err := yaml.Marshal(existingConfig)
if err != nil {
log.Fatalf("%+v", errors.InternalWrapError(err))
}
existingCM.Data = map[string]string{
common.WorkflowControllerConfigMapKey: string(configBytes),
}
_, err = cmClient.Update(existingCM)
if err != nil {
log.Fatalf("Failed to update ConfigMap '%s' in namespace '%s': %v", args.ConfigMap, args.Namespace, err)
}
fmt.Printf("ConfigMap '%s' updated\n", args.ConfigMap)
}
}
func installController(clientset *kubernetes.Clientset, args InstallFlags) {
controllerDeployment := appsv1beta2.Deployment{
TypeMeta: metav1.TypeMeta{
APIVersion: "apps/v1beta2",
Kind: "Deployment",
},
ObjectMeta: metav1.ObjectMeta{
Name: args.ControllerName,
Namespace: args.Namespace,
},
Spec: appsv1beta2.DeploymentSpec{
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"app": args.ControllerName,
},
},
Template: apiv1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
"app": args.ControllerName,
},
},
Spec: apiv1.PodSpec{
ServiceAccountName: args.ServiceAccount,
Containers: []apiv1.Container{
{
Name: args.ControllerName,
Image: args.ControllerImage,
Command: []string{"workflow-controller"},
Args: []string{"--configmap", args.ConfigMap},
Env: []apiv1.EnvVar{
{
Name: common.EnvVarNamespace,
ValueFrom: &apiv1.EnvVarSource{
FieldRef: &apiv1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.namespace",
},
},
},
},
},
},
},
},
},
}
createDeploymentHelper(&controllerDeployment, args)
}
func installUI(clientset *kubernetes.Clientset, args InstallFlags) {
uiDeployment := appsv1beta2.Deployment{
TypeMeta: metav1.TypeMeta{
APIVersion: "apps/v1beta2",
Kind: "Deployment",
},
ObjectMeta: metav1.ObjectMeta{
Name: args.UIName,
Namespace: args.Namespace,
},
Spec: appsv1beta2.DeploymentSpec{
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"app": args.UIName,
},
},
Template: apiv1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
"app": args.UIName,
},
},
Spec: apiv1.PodSpec{
ServiceAccountName: args.UIServiceAccount,
Containers: []apiv1.Container{
{
Name: args.UIName,
Image: args.UIImage,
Env: []apiv1.EnvVar{
{
Name: common.EnvVarNamespace,
ValueFrom: &apiv1.EnvVarSource{
FieldRef: &apiv1.ObjectFieldSelector{
APIVersion: "v1",
FieldPath: "metadata.namespace",
},
},
},
{
Name: "IN_CLUSTER",
Value: "true",
},
{
Name: "ENABLE_WEB_CONSOLE",
Value: strconv.FormatBool(args.EnableWebConsole),
},
},
},
},
},
},
},
}
createDeploymentHelper(&uiDeployment, args)
}
// createDeploymentHelper is helper to create or update an existing deployment (if --upgrade was supplied)
func createDeploymentHelper(deployment *appsv1beta2.Deployment, args InstallFlags) {
depClient := clientset.AppsV1beta2().Deployments(args.Namespace)
var result *appsv1beta2.Deployment
var err error
if args.DryRun {
printYAML(deployment)
return
}
result, err = depClient.Create(deployment)
if err != nil {
if !apierr.IsAlreadyExists(err) {
log.Fatal(err)
}
// deployment already exists
existing, err := depClient.Get(deployment.ObjectMeta.Name, metav1.GetOptions{})
if err != nil {
log.Fatalf("Failed to get existing deployment: %v", err)
}
if upgradeNeeded(deployment, existing) {
if !args.Upgrade {
log.Fatalf("Deployment '%s' requires upgrade. Rerun with --upgrade to upgrade the deployment", deployment.ObjectMeta.Name)
}
existing, err = depClient.Update(deployment)
if err != nil {
log.Fatalf("Failed to update deployment: %v", err)
}
fmt.Printf("Existing deployment '%s' updated\n", existing.GetObjectMeta().GetName())
} else {
fmt.Printf("Existing deployment '%s' up-to-date\n", existing.GetObjectMeta().GetName())
}
} else {
fmt.Printf("Deployment '%s' created\n", result.GetObjectMeta().GetName())
}
}
// upgradeNeeded checks two deployments and returns whether or not there are obvious
// differences in a few deployment/container spec fields that would warrant an
// upgrade. WARNING: This is not intended to be comprehensive -- its primary purpose
// is to check if the controller/UI image is out of date with this version of argo.
func upgradeNeeded(dep1, dep2 *appsv1beta2.Deployment) bool {
if len(dep1.Spec.Template.Spec.Containers) != len(dep2.Spec.Template.Spec.Containers) {
return true
}
for i := 0; i < len(dep1.Spec.Template.Spec.Containers); i++ {
ctr1 := dep1.Spec.Template.Spec.Containers[i]
ctr2 := dep2.Spec.Template.Spec.Containers[i]
if ctr1.Name != ctr2.Name {
return true
}
if ctr1.Image != ctr2.Image {
return true
}
if !reflect.DeepEqual(ctr1.Env, ctr2.Env) {
return true
}
if !reflect.DeepEqual(ctr1.Command, ctr2.Command) {
return true
}
if !reflect.DeepEqual(ctr1.Args, ctr2.Args) {
return true
}
}
return false
}
func installUIService(clientset *kubernetes.Clientset, args InstallFlags) {
svcName := ArgoUIServiceName
svcClient := clientset.CoreV1().Services(args.Namespace)
uiSvc := apiv1.Service{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Service",
},
ObjectMeta: metav1.ObjectMeta{
Name: svcName,
Namespace: args.Namespace,
},
Spec: apiv1.ServiceSpec{
Ports: []apiv1.ServicePort{
{
Port: 80,
TargetPort: intstr.FromInt(8001),
},
},
Selector: map[string]string{
"app": args.UIName,
},
},
}
if args.DryRun {
printYAML(uiSvc)
return
}
_, err := svcClient.Create(&uiSvc)
if err != nil {
if !apierr.IsAlreadyExists(err) {
log.Fatal(err)
}
fmt.Printf("Service '%s' already exists\n", svcName)
} else {
fmt.Printf("Service '%s' created\n", svcName)
}
}
func installCRD(clientset *kubernetes.Clientset, args InstallFlags) {
workflowCRD := apiextensionsv1beta1.CustomResourceDefinition{
TypeMeta: metav1.TypeMeta{
APIVersion: "apiextensions.k8s.io/v1beta1",
Kind: "CustomResourceDefinition",
},
ObjectMeta: metav1.ObjectMeta{
Name: workflow.FullName,
},
Spec: apiextensionsv1beta1.CustomResourceDefinitionSpec{
Group: workflow.Group,
Version: wfv1.SchemeGroupVersion.Version,
Scope: apiextensionsv1beta1.NamespaceScoped,
Names: apiextensionsv1beta1.CustomResourceDefinitionNames{
Plural: workflow.Plural,
Kind: workflow.Kind,
ShortNames: []string{workflow.ShortName},
},
},
}
if args.DryRun {
printYAML(workflowCRD)
return
}
apiextensionsclientset := apiextensionsclient.NewForConfigOrDie(restConfig)
_, err := apiextensionsclientset.ApiextensionsV1beta1().CustomResourceDefinitions().Create(&workflowCRD)
if err != nil {
if !apierr.IsAlreadyExists(err) {
log.Fatalf("Failed to create CustomResourceDefinition: %v", err)
}
fmt.Printf("CustomResourceDefinition '%s' already exists\n", workflow.FullName)
}
// wait for CRD being established
var crd *apiextensionsv1beta1.CustomResourceDefinition
err = wait.Poll(500*time.Millisecond, 60*time.Second, func() (bool, error) {
crd, err = apiextensionsclientset.ApiextensionsV1beta1().CustomResourceDefinitions().Get(workflow.FullName, metav1.GetOptions{})
if err != nil {
return false, err
}
for _, cond := range crd.Status.Conditions {
switch cond.Type {
case apiextensionsv1beta1.Established:
if cond.Status == apiextensionsv1beta1.ConditionTrue {
return true, err
}
case apiextensionsv1beta1.NamesAccepted:
if cond.Status == apiextensionsv1beta1.ConditionFalse {
log.Errorf("Name conflict: %v", cond.Reason)
}
}
}
return false, err
})
if err != nil {
log.Fatalf("Failed to wait for CustomResourceDefinition: %v", err)
}
}