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argo.go
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argo.go
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package application
import (
"fmt"
"github.com/khulnasoft/meshplay/server/helpers"
"github.com/khulnasoft/meshplay/server/models/pattern/patterns/application/argo/v1alpha1"
patternUtils "github.com/khulnasoft/meshplay/server/models/pattern/utils"
"github.com/khulnasoft/meshkit/utils"
meshkube "github.com/khulnasoft/meshkit/utils/kubernetes"
"github.com/sirupsen/logrus"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const argoManifest = "https://raw.githubusercontent.com/argoproj/argo-rollouts/master/manifests/install.yaml"
type ArgoRollout struct {
kubeclient *meshkube.Client
// gRPCClient meshes.MeshServiceClient
}
// Install installs argo rollout in the given namespace
func (ar *ArgoRollout) Install() error {
manifestContent, err := utils.ReadFileSource(argoManifest)
if err != nil {
return err
}
return ar.kubeclient.ApplyManifest([]byte(manifestContent), meshkube.ApplyOptions{
Namespace: "argo-rollouts",
})
}
// Native will do simple rollout
func (ar *ArgoRollout) Native(opt RolloutEngineGenericOptions) error {
if opt.Delete {
// Delete the rollout
if err := patternUtils.DeleteK8sResource(
ar.kubeclient.DynamicKubeClient,
"argoproj.io",
"v1alpha1",
"rollouts",
opt.Namespace,
opt.Name,
); err != nil {
logrus.Error("[Native Rollout]:", err)
return fmt.Errorf("failed to delete resource with name \"%s\" in namespace \"%s\"", opt.Name, opt.Namespace)
}
if !*opt.Advanced.CreateService {
return nil
}
// Delete the service
if err := patternUtils.DeleteK8sResource(
ar.kubeclient.DynamicKubeClient,
"",
"v1",
"services",
opt.Namespace,
opt.Name,
); err != nil {
logrus.Error("[Native Rollout]:", err)
return fmt.Errorf("failed to delete service with name \"%s\" in namespace \"%s\"", opt.Name, opt.Namespace)
}
return nil
}
// Create rollout === deployment
if err := patternUtils.CreateK8sResource(
ar.kubeclient.DynamicKubeClient,
"argoproj.io",
"v1alpha1",
"rollouts",
createNativeArgoResource(opt),
false,
); err != nil {
logrus.Error("[Native Rollout]:", err)
return fmt.Errorf("failed to create resource with name \"%s\" in namespace \"%s\"", opt.Name, opt.Namespace)
}
if !*opt.Advanced.CreateService {
return nil
}
// Create service
if err := patternUtils.CreateK8sResource(
ar.kubeclient.DynamicKubeClient,
"",
"v1",
"services",
createNativeService(opt),
false,
); err != nil {
logrus.Error("[Native Rollout]:", err)
return fmt.Errorf("failed to create service with name \"%s\" in namespace \"%s\"", opt.Name, opt.Namespace)
}
return nil
}
// Canary performs canary rollout of the given application
func (ar *ArgoRollout) Canary(opt RolloutEngineCanaryOptions) error {
if opt.ServiceMesh == "istio" {
return ar.istioCanary(opt)
}
return nil
}
func (ar *ArgoRollout) istioCanary(_ RolloutEngineCanaryOptions) error {
// Performing canary requires 4 steps:
// 1. Create a rollout
// ar.createOrUpdateRollout(opt)
// 2. Create a service for stable
// ar.createOrUpdateService(opt.Namespace, &v1.Service{})
// 3. Create a service for the canary
// ar.createOrUpdateService(opt.Namespace, &v1.Service{})
// 4. Create a virtual service for routing
// invoke remote operation
return nil
}
func createNativeArgoResource(opt RolloutEngineGenericOptions) v1alpha1.Rollout {
replicas := int32(opt.Replicas)
revisionHistoryLimit := int32(2)
containers := []v1.Container{}
weight := int32(100)
for _, container := range opt.Containers {
ports := []v1.ContainerPort{}
for _, port := range container.Ports {
ports = append(ports, v1.ContainerPort{
Name: port.Name,
ContainerPort: int32(port.ContainerPort),
})
}
containers = append(containers, v1.Container{
Name: container.Name,
Image: container.Image,
Ports: ports,
Env: container.Envs,
Command: container.Commands,
})
}
return v1alpha1.Rollout{
TypeMeta: metav1.TypeMeta{
APIVersion: "argoproj.io/v1alpha1",
Kind: "Rollout",
},
ObjectMeta: metav1.ObjectMeta{
Name: opt.Name,
Namespace: opt.Namespace,
Labels: helpers.MergeStringMaps(
map[string]string{"app": opt.Name},
opt.Metadata.Labels,
),
Annotations: helpers.MergeStringMaps(opt.Metadata.Annotations, opt.Metadata.Annotations),
},
Spec: v1alpha1.RolloutSpec{
Replicas: &replicas,
RevisionHistoryLimit: &revisionHistoryLimit,
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"app": opt.Name,
},
},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: helpers.MergeStringMaps(
map[string]string{
"app": opt.Name,
},
opt.Metadata.Labels,
),
},
Spec: v1.PodSpec{
Containers: containers,
},
},
Strategy: v1alpha1.RolloutStrategy{
Canary: &v1alpha1.CanaryStrategy{
Steps: []v1alpha1.CanaryStep{{SetWeight: &weight}},
},
},
},
}
}
func createNativeService(opt RolloutEngineGenericOptions) v1.Service {
ports := []v1.ServicePort{}
for _, container := range opt.Containers {
for _, port := range container.Ports {
ports = append(ports, v1.ServicePort{
Port: int32(port.ContainerPort),
Name: port.Name,
})
}
}
return v1.Service{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Service",
},
ObjectMeta: metav1.ObjectMeta{
Name: opt.Name,
Annotations: helpers.MergeStringMaps(map[string]string{
"meshplay-engine": "argo",
}, opt.Metadata.Annotations),
Labels: opt.Metadata.Labels,
Namespace: opt.Namespace,
},
Spec: v1.ServiceSpec{
Selector: map[string]string{
"app": opt.Name,
},
Ports: ports,
Type: v1.ServiceTypeLoadBalancer, // Should get smarter
},
}
}