/
container.go
173 lines (159 loc) · 4.31 KB
/
container.go
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package whaler
import (
"context"
"fmt"
"strings"
"time"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
"github.com/docker/go-connections/nat"
)
//Container is a basic representation of a docker container
type Container struct {
Name string
ID string
Image string
Volumes []string
Env []string
Ports []string
}
//CreateContainerConfig is a basic configuration structure to create a docker container
type CreateContainerConfig struct {
Name string
Image string
Volumes []string
Env []string
Ports []string
NetworkName string
}
//GetContainers from docker
func GetContainers(all bool) ([]Container, error) {
cli, err := client.NewEnvClient()
if err != nil {
return nil, err
}
containers, err := cli.ContainerList(context.Background(), types.ContainerListOptions{
All: all,
})
if err != nil {
return nil, err
}
_containers := make([]Container, len(containers))
i := 0
for _, container := range containers {
_containers[i] = Container{ID: container.ID, Name: container.Names[0], Image: container.Image}
i++
}
return _containers, nil
}
//FindContainerByIdentifier finds container by id or name
func FindContainerByIdentifier(identifier string, all bool) (Container, error) {
containers, err := GetContainers(all)
if err != nil {
return Container{}, err
}
for _, c := range containers {
if c.Name == identifier || c.ID == identifier {
return c, nil
}
}
return Container{}, fmt.Errorf("container with identifer(name or id) %s not found", identifier)
}
//RemoveContainer by Id the container links and volumes will be removed too
func RemoveContainer(id string, force bool) error {
cli, err := client.NewEnvClient()
if err != nil {
return err
}
return cli.ContainerRemove(context.Background(), id, types.ContainerRemoveOptions{
Force: force,
})
}
//RestartContainer by Id or Name
func RestartContainer(identifier string, timeout *time.Duration) error {
cli, err := client.NewEnvClient()
if err != nil {
return err
}
if contaienr, err := FindContainerByIdentifier(identifier, false); err != nil {
return err
} else {
return cli.ContainerRestart(context.Background(), contaienr.ID, timeout)
}
}
//CreateContainer creates a new container on Docker
func CreateContainer(config CreateContainerConfig) (string, error) {
cli, err := client.NewEnvClient()
if err != nil {
return "", err
}
containerConfig := &container.Config{
Env: config.Env,
Image: config.Image,
AttachStderr: false,
AttachStdin: false,
AttachStdout: false,
NetworkDisabled: false,
ExposedPorts: nat.PortSet{},
}
net := &Network{}
if config.NetworkName != "" {
var ex error
net, ex = FindNetworkByName(config.NetworkName)
if ex != nil {
return "", err
}
}
if config.Volumes == nil {
config.Volumes = make([]string, 0)
}
hostConfig := &container.HostConfig{
NetworkMode: container.NetworkMode(config.NetworkName),
Binds: config.Volumes,
PortBindings: make(nat.PortMap),
}
for _, port := range config.Ports {
parts := strings.Split(port, ":")
pb := nat.PortBinding{}
pb.HostIP = ""
pb.HostPort = parts[0]
var s = nat.Port(parts[1] + "/tcp")
var a struct{}
containerConfig.ExposedPorts[s] = a
list := make([]nat.PortBinding, 0, 1)
list = append(list, pb)
hostConfig.PortBindings[s] = list
}
networkConfig := &network.NetworkingConfig{
EndpointsConfig: map[string]*network.EndpointSettings{config.NetworkName: &network.EndpointSettings{
NetworkID: net.ID,
Aliases: []string{config.Name},
}},
}
if config.NetworkName == "" {
networkConfig = nil
}
resp, err := cli.ContainerCreate(context.Background(), containerConfig, hostConfig, networkConfig, config.Name)
if err != nil {
return "", err
}
return resp.ID, nil
}
//StartContainer starts container by id
func StartContainer(id string) error {
cli, err := client.NewEnvClient()
if err != nil {
return err
}
return cli.ContainerStart(context.Background(), id, types.ContainerStartOptions{})
}
//StopContainer stops container by id
func StopContainer(id string, timeout *time.Duration) error {
cli, err := client.NewEnvClient()
if err != nil {
return err
}
return cli.ContainerStop(context.Background(), id, timeout)
}