/
deployment.go
217 lines (189 loc) · 7.09 KB
/
deployment.go
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package rollouts
import (
"context"
"fmt"
"os"
"reflect"
rolloutsmanagerv1alpha1 "github.com/argoproj-labs/argo-rollouts-manager/api/v1alpha1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
// Reconcile the Rollouts controller deployment.
func (r *RolloutManagerReconciler) reconcileRolloutsDeployment(ctx context.Context, cr *rolloutsmanagerv1alpha1.RolloutManager, sa *corev1.ServiceAccount) error {
// Configuration for the desired deployment
desiredDeployment := &appsv1.Deployment{
ObjectMeta: metav1.ObjectMeta{
Name: DefaultArgoRolloutsResourceName,
Namespace: cr.Namespace,
},
}
setRolloutsLabels(&desiredDeployment.ObjectMeta)
desiredDeployment.Spec = appsv1.DeploymentSpec{
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
DefaultRolloutsSelectorKey: DefaultArgoRolloutsResourceName,
},
},
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
DefaultRolloutsSelectorKey: DefaultArgoRolloutsResourceName,
},
},
Spec: corev1.PodSpec{
NodeSelector: map[string]string{
"kubernetes.io/os": "linux",
},
},
},
}
if cr.Spec.NodePlacement != nil {
desiredDeployment.Spec.Template.Spec.NodeSelector = appendStringMap(
desiredDeployment.Spec.Template.Spec.NodeSelector, cr.Spec.NodePlacement.NodeSelector)
desiredDeployment.Spec.Template.Spec.Tolerations = cr.Spec.NodePlacement.Tolerations
}
desiredPodSpec := &desiredDeployment.Spec.Template.Spec
runAsNonRoot := true
desiredPodSpec.SecurityContext = &corev1.PodSecurityContext{
RunAsNonRoot: &runAsNonRoot,
}
desiredPodSpec.ServiceAccountName = sa.ObjectMeta.Name
desiredPodSpec.Containers = []corev1.Container{
rolloutsContainer(cr),
}
// If the deployment for rollouts does not exist, create one.
actualDeployment := &appsv1.Deployment{}
if err := fetchObject(ctx, r.Client, cr.Namespace, DefaultArgoRolloutsResourceName, actualDeployment); err != nil {
if !errors.IsNotFound(err) {
return fmt.Errorf("failed to get the deployment %s : %s", DefaultArgoRolloutsResourceName, err)
}
if err := controllerutil.SetControllerReference(cr, desiredDeployment, r.Scheme); err != nil {
return err
}
log.Info(fmt.Sprintf("Creating deployment %s", DefaultArgoRolloutsResourceName))
return r.Client.Create(ctx, desiredDeployment)
}
actualPodSpec := actualDeployment.Spec.Template.Spec
// If the Deployment already exists, make sure the values we care about are correct.
deploymentsDifferent := !reflect.DeepEqual(actualPodSpec.Containers[0], desiredPodSpec.Containers) ||
actualPodSpec.ServiceAccountName != desiredPodSpec.ServiceAccountName ||
!reflect.DeepEqual(actualDeployment.Labels, desiredDeployment.Labels) ||
!reflect.DeepEqual(actualDeployment.Spec.Template.Labels, desiredDeployment.Spec.Template.Labels) ||
!reflect.DeepEqual(actualDeployment.Spec.Selector, desiredDeployment.Spec.Selector) ||
!reflect.DeepEqual(actualDeployment.Spec.Template.Spec.NodeSelector, desiredDeployment.Spec.Template.Spec.NodeSelector) ||
!reflect.DeepEqual(actualDeployment.Spec.Template.Spec.Tolerations, desiredDeployment.Spec.Template.Spec.Tolerations) ||
!reflect.DeepEqual(actualPodSpec.SecurityContext, desiredPodSpec.SecurityContext) ||
!reflect.DeepEqual(actualDeployment.Spec.Template.Spec.Volumes, desiredDeployment.Spec.Template.Spec.Volumes)
if deploymentsDifferent {
actualDeployment.Spec.Template.Spec.Containers = desiredPodSpec.Containers
actualDeployment.Spec.Template.Spec.ServiceAccountName = desiredPodSpec.ServiceAccountName
actualDeployment.Labels = desiredDeployment.Labels
actualDeployment.Spec.Template.Labels = desiredDeployment.Spec.Template.Labels
actualDeployment.Spec.Selector = desiredDeployment.Spec.Selector
actualDeployment.Spec.Template.Spec.NodeSelector = desiredDeployment.Spec.Template.Spec.NodeSelector
actualDeployment.Spec.Template.Spec.Tolerations = desiredDeployment.Spec.Template.Spec.Tolerations
actualDeployment.Spec.Template.Spec.SecurityContext = desiredPodSpec.SecurityContext
actualDeployment.Spec.Template.Spec.Volumes = desiredDeployment.Spec.Template.Spec.Volumes
return r.Client.Update(ctx, actualDeployment)
}
return nil
}
func rolloutsContainer(cr *rolloutsmanagerv1alpha1.RolloutManager) corev1.Container {
// Global proxy env vars go firstArgoRollouts
rolloutsEnv := cr.Spec.Env
// Environment specified in the CR take precedence over everything else
rolloutsEnv = envMerge(rolloutsEnv, proxyEnvVars(), false)
return corev1.Container{
Args: getRolloutsCommandArgs(cr),
Env: rolloutsEnv,
Image: getRolloutsContainerImage(cr),
ImagePullPolicy: corev1.PullAlways,
LivenessProbe: &corev1.Probe{
FailureThreshold: 3,
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/healthz",
Port: intstr.FromString("healthz"),
},
},
InitialDelaySeconds: int32(30),
PeriodSeconds: int32(20),
SuccessThreshold: int32(1),
TimeoutSeconds: int32(10),
},
Name: "argo-rollouts",
Ports: []corev1.ContainerPort{
{
ContainerPort: 8080,
Name: "healthz",
},
{
ContainerPort: 8090,
Name: "metrics",
},
},
ReadinessProbe: &corev1.Probe{
FailureThreshold: int32(5),
ProbeHandler: corev1.ProbeHandler{
HTTPGet: &corev1.HTTPGetAction{
Path: "/metrics",
Port: intstr.FromString("metrics"),
},
},
InitialDelaySeconds: int32(10),
PeriodSeconds: int32(5),
SuccessThreshold: int32(1),
TimeoutSeconds: int32(4),
},
SecurityContext: &corev1.SecurityContext{
Capabilities: &corev1.Capabilities{
Drop: []corev1.Capability{
"ALL",
},
},
AllowPrivilegeEscalation: boolPtr(false),
ReadOnlyRootFilesystem: boolPtr(false),
RunAsNonRoot: boolPtr(true),
},
}
}
// boolPtr returns a pointer to val
func boolPtr(val bool) *bool {
return &val
}
// Returns the container image for rollouts controller.
func getRolloutsContainerImage(cr *rolloutsmanagerv1alpha1.RolloutManager) string {
defaultImg, defaultTag := false, false
img := cr.Spec.Image
tag := cr.Spec.Version
// If spec is empty, use the defaults
if img == "" {
img = DefaultArgoRolloutsImage
defaultImg = true
}
if tag == "" {
tag = DefaultArgoRolloutsVersion
defaultTag = true
}
// If an env var is specified then use that, but don't override the spec values (if they are present)
if e := os.Getenv(ArgoRolloutsImageEnvName); e != "" && (defaultTag && defaultImg) {
return e
}
return combineImageTag(img, tag)
}
// getRolloutsCommand will return the command for the Rollouts controller component.
func getRolloutsCommandArgs(cr *rolloutsmanagerv1alpha1.RolloutManager) []string {
args := make([]string, 0)
args = append(args, "--namespaced")
extraArgs := cr.Spec.ExtraCommandArgs
err := isMergable(extraArgs, args)
if err != nil {
return args
}
args = append(args, extraArgs...)
return args
}