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daemonset.go
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daemonset.go
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/*
Copyright 2022.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package agent
import (
"fmt"
"github.com/fluxninja/aperture/v2/operator/controllers"
"github.com/go-logr/logr"
"github.com/imdario/mergo"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/utils/pointer"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
agentv1alpha1 "github.com/fluxninja/aperture/v2/operator/api/agent/v1alpha1"
)
// daemonsetForAgent prepares the DaemonSet object for the Agent.
func daemonsetForAgent(instance *agentv1alpha1.Agent, log logr.Logger, scheme *runtime.Scheme) (*appsv1.DaemonSet, error) {
spec := instance.Spec
podLabels := controllers.CommonLabels(spec.Labels, instance.GetName(), controllers.AgentServiceName)
if spec.PodLabels != nil {
if err := mergo.Map(&podLabels, spec.PodLabels, mergo.WithOverride); err != nil {
log.Info(fmt.Sprintf("failed to merge the Pod labels for Deployment. error: %s.", err.Error()))
}
}
probeScheme := corev1.URISchemeHTTP
if instance.Spec.ConfigSpec.Server.TLS.Enabled {
probeScheme = corev1.URISchemeHTTPS
}
livenessProbe, readinessProbe := controllers.ContainerProbes(spec.CommonSpec, probeScheme)
serverPort, err := controllers.GetPort(spec.ConfigSpec.Server.Listener.Addr)
if err != nil {
return nil, err
}
distCachePort, err := controllers.GetPort(spec.ConfigSpec.DistCache.BindAddr)
if err != nil {
return nil, err
}
memberListPort, err := controllers.GetPort(spec.ConfigSpec.DistCache.MemberlistBindAddr)
if err != nil {
return nil, err
}
daemonset := &appsv1.DaemonSet{
ObjectMeta: v1.ObjectMeta{
Name: controllers.AgentServiceName,
Namespace: instance.GetNamespace(),
Labels: controllers.CommonLabels(spec.Labels, instance.GetName(), controllers.AgentServiceName),
Annotations: spec.Annotations,
},
Spec: appsv1.DaemonSetSpec{
Selector: &v1.LabelSelector{
MatchLabels: controllers.SelectorLabels(instance.GetName(), controllers.AgentServiceName),
},
Template: corev1.PodTemplateSpec{
ObjectMeta: v1.ObjectMeta{
Labels: podLabels,
Annotations: spec.PodAnnotations,
},
Spec: corev1.PodSpec{
ServiceAccountName: controllers.AgentServiceName,
ImagePullSecrets: controllers.ImagePullSecrets(spec.Image.Image),
NodeSelector: spec.NodeSelector,
Affinity: spec.Affinity,
Tolerations: spec.Tolerations,
SecurityContext: controllers.PodSecurityContext(spec.PodSecurityContext),
TerminationGracePeriodSeconds: pointer.Int64(spec.TerminationGracePeriodSeconds),
InitContainers: spec.InitContainers,
Containers: []corev1.Container{
{
Name: controllers.AgentServiceName,
Image: controllers.ImageString(spec.Image.Image, spec.Image.Repository),
ImagePullPolicy: corev1.PullPolicy(spec.Image.PullPolicy),
SecurityContext: controllers.ContainerSecurityContext(spec.ContainerSecurityContext),
Command: spec.Command,
Args: spec.Args,
Env: controllers.AgentEnv(instance, ""),
EnvFrom: controllers.ContainerEnvFrom(spec.CommonSpec),
Resources: spec.Resources,
Ports: []corev1.ContainerPort{
{
Name: controllers.Server,
ContainerPort: serverPort,
Protocol: corev1.ProtocolTCP,
},
{
Name: controllers.DistCache,
ContainerPort: distCachePort,
Protocol: corev1.ProtocolTCP,
},
{
Name: controllers.MemberList,
ContainerPort: memberListPort,
Protocol: corev1.ProtocolTCP,
},
{
Name: controllers.OtelDebugPort,
ContainerPort: int32(spec.ConfigSpec.OTel.Ports.DebugPort),
Protocol: corev1.ProtocolTCP,
},
{
Name: controllers.OtelHealthcheckPort,
ContainerPort: int32(spec.ConfigSpec.OTel.Ports.HealthCheckPort),
Protocol: corev1.ProtocolTCP,
},
{
Name: controllers.OtelPprofPort,
ContainerPort: int32(spec.ConfigSpec.OTel.Ports.PprofPort),
Protocol: corev1.ProtocolTCP,
},
{
Name: controllers.OtelZpagesPort,
ContainerPort: int32(spec.ConfigSpec.OTel.Ports.ZpagesPort),
Protocol: corev1.ProtocolTCP,
},
},
TerminationMessagePath: "/dev/termination-log",
TerminationMessagePolicy: corev1.TerminationMessageReadFile,
LivenessProbe: livenessProbe,
ReadinessProbe: readinessProbe,
Lifecycle: spec.LifecycleHooks,
VolumeMounts: controllers.AgentVolumeMounts(spec),
},
},
Volumes: controllers.AgentVolumes(spec),
},
},
},
}
if spec.Sidecars != nil {
daemonset.Spec.Template.Spec.Containers = append(daemonset.Spec.Template.Spec.Containers, spec.Sidecars...)
}
if err := ctrl.SetControllerReference(instance, daemonset, scheme); err != nil {
return nil, err
}
return daemonset, nil
}
// daemonsetMutate returns a mutate function that can be used to update the DaemonSet's spec.
func daemonsetMutate(dms *appsv1.DaemonSet, spec appsv1.DaemonSetSpec) controllerutil.MutateFn {
return func() error {
dms.Spec.Selector = spec.Selector
dms.Spec.Template.Annotations = spec.Template.Annotations
dms.Spec.Template.Labels = spec.Template.Labels
dms.Spec.Template.Spec.ServiceAccountName = spec.Template.Spec.ServiceAccountName
dms.Spec.Template.Spec.ImagePullSecrets = spec.Template.Spec.ImagePullSecrets
dms.Spec.Template.Spec.NodeSelector = spec.Template.Spec.NodeSelector
dms.Spec.Template.Spec.Tolerations = spec.Template.Spec.Tolerations
dms.Spec.Template.Spec.SecurityContext = spec.Template.Spec.SecurityContext
dms.Spec.Template.Spec.InitContainers = spec.Template.Spec.InitContainers
dms.Spec.Template.Spec.Containers = spec.Template.Spec.Containers
dms.Spec.Template.Spec.Volumes = spec.Template.Spec.Volumes
return nil
}
}