/
service.go
225 lines (192 loc) · 5.78 KB
/
service.go
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package pc_docker
import (
"context"
"fmt"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/swarm"
"github.com/docker/docker/client"
"github.com/plancks-cloud/plancks-cloud/model"
pcmodel "github.com/plancks-cloud/plancks-docker/model"
"log"
"sort"
)
// CreateService creates a service
func CreateService(service *model.Service) (err error) {
cli, err := client.NewEnvClient()
ctx := context.Background()
if err != nil {
log.Printf("Error getting docker client environment: %s", err)
return err
}
replicas := uint64(service.Replicas)
for _, networkName := range service.Networks {
if networkName != "" {
err = createNetwork(networkName)
} else {
networkName = DefaultNetwork
err = createNetwork(networkName)
}
if err != nil {
log.Printf("Error occurred while creating the network %s: %s", networkName, err)
}
}
var nets []swarm.NetworkAttachmentConfig
nets = append(nets, swarm.NetworkAttachmentConfig{Target: DefaultNetwork})
spec := swarm.ServiceSpec{
Annotations: swarm.Annotations{
Name: service.Name,
},
Mode: swarm.ServiceMode{
Replicated: &swarm.ReplicatedService{
Replicas: &replicas,
},
},
TaskTemplate: swarm.TaskSpec{
ContainerSpec: swarm.ContainerSpec{
Image: service.Image,
},
Networks: nets,
Resources: &swarm.ResourceRequirements{
Limits: &swarm.Resources{
MemoryBytes: int64(service.MemoryLimit * 1024 * 1024),
},
},
},
}
_, err = cli.ServiceCreate(
ctx,
spec,
types.ServiceCreateOptions{},
)
if err != nil {
log.Printf("Error creating docker service: %s", err)
return err
}
return err
}
func GetAllServices() (results []model.Service, err error) {
serviceStates, err := GetAllServiceStates()
if err != nil {
return nil, err
}
for _, serviceState := range serviceStates {
results = append(results, model.Service{
ID: serviceState.ID,
Image: serviceState.Image,
Name: serviceState.Name,
Replicas: int(serviceState.ReplicasRequired),
MemoryLimit: serviceState.MemoryLimit})
}
return
}
// DockerServices gets all running docker services
func GetAllServiceStates() (results []pcmodel.ServiceState, err error) {
cli, err := client.NewEnvClient()
ctx := context.Background()
if err != nil {
log.Println(fmt.Sprintf("Error getting docker client environment: %s", err))
return nil, err
}
services, err := cli.ServiceList(context.Background(), types.ServiceListOptions{})
if err != nil {
log.Println(fmt.Sprintf("Error getting docker client environment: %s", err))
return nil, err
}
sort.Sort(pcmodel.ByName(services))
if len(services) > 0 {
// only non-empty services and not quiet, should we call TaskList and NodeList api
taskFilter := filters.NewArgs()
for _, service := range services {
taskFilter.Add("service", service.ID)
}
tasks, err := cli.TaskList(ctx, types.TaskListOptions{Filters: taskFilter})
if err != nil {
log.Println("Error getting tasks")
return nil, err
}
nodes, err := cli.NodeList(ctx, types.NodeListOptions{})
if err != nil {
log.Println("Error getting nodes")
return nil, err
}
info := TotalReplicas(services, nodes, tasks)
for _, item := range info {
results = append(results, item)
}
}
return
}
// TotalReplicas returns the total number of replicas running for a service
func TotalReplicas(services []swarm.Service, nodes []swarm.Node, tasks []swarm.Task) map[string]pcmodel.ServiceState {
running := map[string]int{}
tasksNoShutdown := map[string]int{}
activeNodes := make(map[string]struct{})
replicaState := make(map[string]pcmodel.ServiceState)
for _, n := range nodes {
if n.Status.State != swarm.NodeStateDown {
activeNodes[n.ID] = struct{}{}
}
}
for _, task := range tasks {
if task.DesiredState != swarm.TaskStateShutdown {
tasksNoShutdown[task.ServiceID]++
}
if _, nodeActive := activeNodes[task.NodeID]; nodeActive && task.Status.State == swarm.TaskStateRunning {
running[task.ServiceID]++
}
}
for _, service := range services {
if service.Spec.Mode.Replicated != nil && service.Spec.Mode.Replicated.Replicas != nil {
//TODO Check if this is a valid way of getting the memory limits. Should probably be a pointer.
memLimit := 0
if service.Spec.TaskTemplate.Resources.Limits != nil {
memLimit = int(service.Spec.TaskTemplate.Resources.Limits.MemoryBytes)
}
replicaState[service.ID] = pcmodel.ServiceState{
ID: service.ID,
Name: service.Spec.Name,
Image: service.Spec.TaskTemplate.ContainerSpec.Image,
ReplicasRunning: running[service.ID],
MemoryLimit: memLimit,
ReplicasRequired: *service.Spec.Mode.Replicated.Replicas}
}
}
return replicaState
}
func DeleteServices(services []pcmodel.ServiceState) (err error) {
cli, err := client.NewEnvClient()
ctx := context.Background()
if err != nil {
log.Printf("Error getting docker client environment: %s", err)
return err
}
runningServices, err := serviceIdFromName(services)
if err != nil {
log.Printf("Error getting service IDs: %s", err)
}
for serviceId, serviceName := range runningServices {
log.Printf("🔥 Removing service: %s", serviceName)
err := cli.ServiceRemove(ctx, serviceId)
if err != nil {
log.Printf("Error deleting service %s: %s", serviceName, err)
return err
}
}
return
}
func serviceIdFromName(services []pcmodel.ServiceState) (deletables map[string]string, err error) {
runningServices, err := GetAllServiceStates()
if err != nil {
log.Printf("Error getting services: %s", err)
return nil, err
}
for _, service := range services {
for _, runningService := range runningServices {
if service.Name == runningService.Name {
deletables[runningService.ID] = service.Name
}
}
}
return deletables, err
}