/
container.go
161 lines (139 loc) · 4.49 KB
/
container.go
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package docker
import (
"encoding/json"
"fmt"
"io/ioutil"
"time"
dockerTypes "github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/go-connections/nat"
"github.com/sdslabs/gasper/configs"
"github.com/sdslabs/gasper/types"
"golang.org/x/net/context"
)
// CreateApplicationContainer creates a new container of the given container options, returns id of the container created
func CreateApplicationContainer(containerCfg types.ApplicationContainer) (string, error) {
ctx := context.Background()
volume := fmt.Sprintf("%s:%s", containerCfg.StoreDir, containerCfg.WorkDir)
// convert map to list of strings
envArr := []string{}
for key, value := range containerCfg.Env {
envArr = append(envArr, fmt.Sprintf("%s=%v", key, value))
}
containerPortRule := nat.Port(fmt.Sprintf(`%d/tcp`, containerCfg.ApplicationPort))
containerConfig := &container.Config{
WorkingDir: containerCfg.WorkDir,
Image: containerCfg.Image,
ExposedPorts: nat.PortSet{
containerPortRule: struct{}{},
},
Env: envArr,
Volumes: map[string]struct{}{
volume: {},
},
Healthcheck: &container.HealthConfig{
Test: []string{"CMD-SHELL", fmt.Sprintf("curl --fail --silent http://localhost:%d/ || exit 1", containerCfg.ApplicationPort)},
Interval: configs.ServiceConfig.AppMaker.MetricsInterval * time.Second,
Timeout: 10 * time.Second,
Retries: 3,
},
}
hostConfig := &container.HostConfig{
Binds: []string{
volume,
},
DNS: containerCfg.NameServers,
PortBindings: nat.PortMap{
nat.Port(containerPortRule): []nat.PortBinding{{
HostIP: "0.0.0.0",
HostPort: fmt.Sprintf("%d", containerCfg.ContainerPort)}},
},
Resources: container.Resources{
NanoCPUs: containerCfg.CPU,
Memory: containerCfg.Memory,
},
}
createdConf, err := cli.ContainerCreate(ctx, containerConfig, hostConfig, nil, containerCfg.Name)
if err != nil {
return "", err
}
return createdConf.ID, nil
}
// CreateDatabaseContainer function creates a new container of the given container options, returns id of the container created
func CreateDatabaseContainer(containerCfg types.DatabaseContainer) (string, error) {
ctx := context.Background()
volume := fmt.Sprintf("%s:%s", containerCfg.StoreDir, containerCfg.WorkDir)
envArr := []string{}
for key, value := range containerCfg.Env {
envArr = append(envArr, fmt.Sprintf("%s=%v", key, value))
}
containerPortRule := nat.Port(fmt.Sprintf(`%d/tcp`, containerCfg.DatabasePort))
containerConfig := &container.Config{
Image: containerCfg.Image,
ExposedPorts: nat.PortSet{
containerPortRule: struct{}{},
},
Env: envArr,
Volumes: map[string]struct{}{
volume: {},
},
}
if containerCfg.HasCustomCMD() {
containerConfig.Cmd = containerCfg.Cmd
}
hostConfig := &container.HostConfig{
Binds: []string{
volume,
},
PortBindings: nat.PortMap{
nat.Port(containerPortRule): []nat.PortBinding{{
HostIP: "0.0.0.0",
HostPort: fmt.Sprintf("%d", containerCfg.ContainerPort)}},
},
}
createdConf, err := cli.ContainerCreate(ctx, containerConfig, hostConfig, nil, containerCfg.Name)
if err != nil {
return "", err
}
return createdConf.ID, nil
}
// StartContainer starts the container corresponding to given containerID
func StartContainer(containerID string) error {
ctx := context.Background()
return cli.ContainerStart(ctx, containerID, dockerTypes.ContainerStartOptions{})
}
// StopContainer stops the container corresponding to given containerID
func StopContainer(containerID string) error {
ctx := context.Background()
return cli.ContainerStop(ctx, containerID, nil)
}
// ListContainers lists all containers
func ListContainers() ([]string, error) {
ctx := context.Background()
containers, err := cli.ContainerList(ctx, dockerTypes.ContainerListOptions{All: true})
if err != nil {
return nil, err
}
list := make([]string, 0)
for _, container := range containers {
if len(container.Names) > 0 && len(container.Names[0]) > 1 {
list = append(list, container.Names[0][1:])
}
}
return list, nil
}
// ContainerStats returns container statistics using the containerID
func ContainerStats(containerID string) (*types.Stats, error) {
ctx := context.Background()
containerStats, err := cli.ContainerStats(ctx, containerID, false)
if err != nil {
return nil, err
}
body, err := ioutil.ReadAll(containerStats.Body)
if err != nil {
return nil, err
}
containerStatsInterface := &types.Stats{}
err = json.Unmarshal(body, containerStatsInterface)
return containerStatsInterface, err
}