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deployment-builder.go
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deployment-builder.go
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// Copyright (c) 2024 Benjamin Borbe All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package k8s
import (
"context"
"github.com/bborbe/errors"
"github.com/bborbe/validation"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
)
//counterfeiter:generate -o mocks/k8s-deployment-builder.go --fake-name K8sDeploymentBuilder . DeploymentBuilder
type DeploymentBuilder interface {
Build(ctx context.Context) (*appsv1.Deployment, error)
SetObjectMetaBuilder(objectMetaBuilder ObjectMetaBuilder) DeploymentBuilder
SetContainersBuilder(containersBuilder ContainersBuilder) DeploymentBuilder
SetName(name string) DeploymentBuilder
SetReplicas(replicas int32) DeploymentBuilder
SetComponent(component string) DeploymentBuilder
SetServiceAccountName(serviceAccountName string) DeploymentBuilder
AddVolumes(volumes ...corev1.Volume) DeploymentBuilder
SetVolumes(volumes []corev1.Volume) DeploymentBuilder
SetAffinity(affinity corev1.Affinity) DeploymentBuilder
}
func NewDeploymentBuilder() DeploymentBuilder {
return &deploymentBuilder{
replicas: 1,
}
}
type deploymentBuilder struct {
component string
name string
objectMetaBuilder ObjectMetaBuilder
replicas int32
serviceAccountName string
volumes []corev1.Volume
containersBuilder ContainersBuilder
affinity *corev1.Affinity
}
func (d *deploymentBuilder) SetAffinity(affinity corev1.Affinity) DeploymentBuilder {
d.affinity = &affinity
return d
}
func (d *deploymentBuilder) SetContainersBuilder(containersBuilder ContainersBuilder) DeploymentBuilder {
d.containersBuilder = containersBuilder
return d
}
func (d *deploymentBuilder) AddVolumes(volumes ...corev1.Volume) DeploymentBuilder {
d.volumes = append(d.volumes, volumes...)
return d
}
func (d *deploymentBuilder) SetVolumes(volumes []corev1.Volume) DeploymentBuilder {
d.volumes = volumes
return d
}
func (d *deploymentBuilder) SetServiceAccountName(serviceAccountName string) DeploymentBuilder {
d.serviceAccountName = serviceAccountName
return d
}
func (d *deploymentBuilder) SetObjectMetaBuilder(objectMetaBuilder ObjectMetaBuilder) DeploymentBuilder {
d.objectMetaBuilder = objectMetaBuilder
return d
}
func (d *deploymentBuilder) SetName(name string) DeploymentBuilder {
d.name = name
return d
}
func (d *deploymentBuilder) SetReplicas(replicas int32) DeploymentBuilder {
d.replicas = replicas
return d
}
func (d *deploymentBuilder) SetComponent(component string) DeploymentBuilder {
d.component = component
return d
}
func (d *deploymentBuilder) Validate(ctx context.Context) error {
return validation.All{
validation.Name("ObjectMeta", validation.NotNilAndValid(d.objectMetaBuilder)),
validation.Name("ContainersBuilder", validation.NotNilAndValid(d.containersBuilder)),
}.Validate(ctx)
}
func (d *deploymentBuilder) Build(ctx context.Context) (*appsv1.Deployment, error) {
if err := d.Validate(ctx); err != nil {
return nil, errors.Wrapf(ctx, err, "validate deploymentBuilder failed")
}
objectMeta, err := d.objectMetaBuilder.Build(ctx)
if err != nil {
return nil, errors.Wrapf(ctx, err, "build objectMeta failed")
}
containers, err := d.containersBuilder.Build(ctx)
if err != nil {
return nil, errors.Wrapf(ctx, err, "build containers failed")
}
maxUnavailable := intstr.FromInt32(1)
maxSurge := intstr.FromInt32(1)
return &appsv1.Deployment{
TypeMeta: metav1.TypeMeta{
Kind: "Deployment",
APIVersion: "apps/v1",
},
ObjectMeta: *objectMeta,
Spec: appsv1.DeploymentSpec{
Replicas: &d.replicas,
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"app": d.name,
},
},
Strategy: appsv1.DeploymentStrategy{
RollingUpdate: &appsv1.RollingUpdateDeployment{
MaxUnavailable: &maxUnavailable,
MaxSurge: &maxSurge,
},
Type: appsv1.RollingUpdateDeploymentStrategyType,
},
Template: corev1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
"prometheus.io/path": "/metrics",
"prometheus.io/port": "9090",
"prometheus.io/scheme": "http",
"prometheus.io/scrape": "true",
},
Labels: map[string]string{
"component": d.component,
"app": d.name,
},
},
Spec: corev1.PodSpec{
Affinity: d.affinity,
Containers: containers,
ServiceAccountName: d.serviceAccountName,
ImagePullSecrets: []corev1.LocalObjectReference{
{
Name: "docker",
},
},
Volumes: d.volumes,
},
},
},
}, nil
}