/
compose.go
571 lines (513 loc) · 17.1 KB
/
compose.go
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package commands
import (
"fmt"
"io/ioutil"
"path/filepath"
"strconv"
"strings"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"gopkg.in/yaml.v2"
"github.com/ailispaw/talk2docker/api"
"github.com/ailispaw/talk2docker/client"
)
var composeFlags = struct {
Name string // --name
Ports []string // --publish
Volumes []string // --volume
Hostname string // --hostname
Domainname string // --domain
User string // --user
Memory int64 // --memory
MemorySwap int64 // --memory-swap
CpuShares int64 // --cpu-shares
Cpuset string // --cpuset
ExposedPorts []string // --expose
Tty bool // --tty
OpenStdin bool // --interactive
Env []string // --env
Cmd []string // --cmd
WorkingDir string // --workdir
Entrypoint string // --entrypoint
MacAddress string // --mac-address
Privileged bool // --privileged
Links []string // --link
PublishAllPorts bool // --publish-all
Dns []string // --dns
DnsSearch []string // --dns-search
ExtraHosts []string // --add-host
VolumesFrom []string // --volumes-from
Devices []string // --device
NetworkMode string // --net
IpcMode string // --ipc
PidMode string // --pid
CapAdd []string // --cap-add
CapDrop []string // --cap-drop
RestartPolicy string // --restart
SecurityOpt []string // --security-opt
ReadonlyRootfs bool // --read-only
}{}
var cmdCompose = &cobra.Command{
Use: "compose <PATH/TO/YAML> [NAME...]",
Aliases: []string{"fig", "create"},
Short: "Create containers",
Long: APP_NAME + " compose - Create containers",
Run: composeContainers,
}
var cmdComposeContainers = &cobra.Command{
Use: "compose <PATH/TO/YAML> [NAME...]",
Aliases: []string{"fig", "create"},
Short: "Create containers",
Long: APP_NAME + " container compose - Create containers",
Run: composeContainers,
}
func init() {
for _, flags := range []*pflag.FlagSet{cmdCompose.Flags(), cmdComposeContainers.Flags()} {
flags.StringVar(&composeFlags.Name, "name", "", "Override the name of the container")
flags.StringSliceVarP(&composeFlags.Ports, "publish", "p", nil, "Publish a container's port to the host")
flags.StringSliceVarP(&composeFlags.Volumes, "volume", "v", nil, "Bind mount volume(s)")
flags.StringVar(&composeFlags.Hostname, "hostname", "", "Hostname of the container")
flags.StringVar(&composeFlags.Domainname, "domain", "", "Domain name of the container")
flags.StringVarP(&composeFlags.User, "user", "u", "", "Username or UID")
flags.Int64VarP(&composeFlags.Memory, "memory", "m", 0, "Memory limit")
flags.Int64Var(&composeFlags.MemorySwap, "memory-swap", 0, "Total memory (memory + swap), '-1' to disable swap")
flags.Int64Var(&composeFlags.CpuShares, "cpu-shares", 0, "CPU shares (relative weight)")
flags.StringVar(&composeFlags.Cpuset, "cpuset", "", "CPUs in which to allow execution (0-3, 0,1)")
flags.StringSliceVar(&composeFlags.ExposedPorts, "expose", nil, "Expose a port or a range of ports without publishing")
flags.BoolVarP(&composeFlags.Tty, "tty", "t", false, "Allocate a pseudo-TTY")
flags.BoolVarP(&composeFlags.OpenStdin, "interactive", "i", false, "Keep STDIN open even if not attached")
flags.StringSliceVarP(&composeFlags.Env, "env", "e", nil, "Set environment variable(s)")
flags.StringSliceVarP(&composeFlags.Cmd, "cmd", "c", nil, "Command line to execute")
flags.StringVarP(&composeFlags.WorkingDir, "workdir", "w", "", "Working directory inside the container")
flags.StringVar(&composeFlags.Entrypoint, "entrypoint", "", "Overwrite the default ENTRYPOINT of the image")
flags.StringVar(&composeFlags.MacAddress, "mac-address", "", "Assign a MAC address to the container")
flags.BoolVar(&composeFlags.Privileged, "privileged", false, "Give extended privileges to the container")
flags.StringSliceVar(&composeFlags.Links, "link", nil, "Add link to another container in the form of NAME:ALIAS")
flags.BoolVar(&composeFlags.PublishAllPorts, "publish-all", false, "Publish all exposed ports to random ports")
flags.StringSliceVar(&composeFlags.Dns, "dns", nil, "Set custom DNS servers")
flags.StringSliceVar(&composeFlags.DnsSearch, "dns-search", nil, "Set custom DNS search domains")
flags.StringSliceVar(&composeFlags.ExtraHosts, "add-host", nil, "Add a custom host-to-IP mapping (host:ip)")
flags.StringSliceVar(&composeFlags.VolumesFrom, "volumes-from", nil, "Mount volumes from the specified container(s)")
flags.StringSliceVar(&composeFlags.Devices, "device", nil, "Add a host device to the container")
flags.StringVar(&composeFlags.NetworkMode, "net", "", "Set the Network mode for the container")
flags.StringVar(&composeFlags.IpcMode, "ipc", "", "IPC namespace to use")
flags.StringVar(&composeFlags.PidMode, "pid", "", "PID namespace to use")
flags.StringSliceVar(&composeFlags.CapAdd, "cap-add", nil, "Add Linux capabilities")
flags.StringSliceVar(&composeFlags.CapDrop, "cap-drop", nil, "Drop Linux capabilities")
flags.StringVar(&composeFlags.RestartPolicy, "restart", "", "Restart policy to apply when a container exits (no, on-failure[:MAX-RETRY], always)")
flags.StringSliceVar(&composeFlags.SecurityOpt, "security-opt", nil, "Security options")
flags.BoolVar(&composeFlags.ReadonlyRootfs, "read-only", false, "Mount the container's root filesystem as read only")
}
cmdContainer.AddCommand(cmdComposeContainers)
}
type Composer struct {
Name string
Build string `yaml:"build"`
Ports []string `yaml:"ports"`
Volumes []string `yaml:"volumes"`
// api.Config
Hostname string `yaml:"hostname"`
Domainname string `yaml:"domainname"`
User string `yaml:"user"`
Memory int64 `yaml:"mem_limit"`
MemorySwap int64 `yaml:"mem_swap"`
CpuShares int64 `yaml:"cpu_shares"`
Cpuset string `yaml:"cpuset"`
ExposedPorts []string `yaml:"expose"`
Tty bool `yaml:"tty"`
OpenStdin bool `yaml:"stdin_open"`
Env []string `yaml:"environment"`
Cmd []string `yaml:"command"`
Image string `yaml:"image"`
WorkingDir string `yaml:"working_dir"`
Entrypoint string `yaml:"entrypoint"`
MacAddress string `yaml:"mac_address"`
// api.HostConfig
Privileged bool `yaml:"privileged"`
Links []string `yaml:"links"`
ExternalLinks []string `yaml:"external_links"`
PublishAllPorts bool `yaml:"publish_all"`
Dns []string `yaml:"dns"`
DnsSearch []string `yaml:"dns_search"`
ExtraHosts []string `yaml:"add_host"`
VolumesFrom []string `yaml:"volumes_from"`
Devices []string `yaml:"device"`
NetworkMode string `yaml:"net"`
IpcMode string `yaml:"ipc"`
PidMode string `yaml:"pid"`
CapAdd []string `yaml:"cap_add"`
CapDrop []string `yaml:"cap_drop"`
RestartPolicy string `yaml:"restart"`
SecurityOpt []string `yaml:"security_opt"`
ReadonlyRootfs bool `yaml:"read_only"`
}
func composeContainers(ctx *cobra.Command, args []string) {
if len(args) < 1 {
ErrorExit(ctx, "Needs an argument <PATH/TO/YAML> to compose containers")
}
path := filepath.Clean(args[0])
root := filepath.Dir(path)
var names []string
if len(args) > 1 {
names = args[1:]
}
data, err := ioutil.ReadFile(path)
if err != nil {
log.Fatal(err)
}
var composers map[string]Composer
if err := yaml.Unmarshal(data, &composers); err != nil {
log.Fatal(err)
}
var gotError = false
if len(names) == 0 {
for name, composer := range composers {
composer.Name = name
composer = mergeComposeFlags(ctx, composer)
if cid, err := composeContainer(ctx, root, composer); err != nil {
log.Error(err)
gotError = true
} else {
ctx.Println(cid)
}
}
}
for _, name := range names {
if composer, ok := composers[name]; ok {
composer.Name = name
composer = mergeComposeFlags(ctx, composer)
if cid, err := composeContainer(ctx, root, composer); err != nil {
log.Error(err)
gotError = true
} else {
ctx.Println(cid)
}
}
}
if gotError {
log.Fatal("Error: failed to compose one or more containers")
}
}
func composeContainer(ctx *cobra.Command, root string, composer Composer) (string, error) {
var (
config api.Config
hostConfig api.HostConfig
localVolumes = make(map[string]struct{})
bindVolumes []string
exposedPorts = make(map[string]struct{})
portBindings = make(map[string][]api.PortBinding)
links []string
deviceMappings []api.DeviceMapping
)
if composer.Image != "" {
r, n, t, err := client.ParseRepositoryName(composer.Image)
if err != nil {
return "", err
}
composer.Image = n + ":" + t
if r != "" {
composer.Image = r + "/" + composer.Image
}
}
if (composer.WorkingDir != "") && !filepath.IsAbs(composer.WorkingDir) {
return "", fmt.Errorf("Invalid working directory: it must be absolute.")
}
docker, err := client.NewDockerClient(configPath, hostName, ctx.Out())
if err != nil {
return "", err
}
if composer.Build != "" {
if !filepath.IsAbs(composer.Build) {
composer.Build = filepath.Join(root, composer.Build)
}
message, err := docker.BuildImage(composer.Build, composer.Image, false)
if err != nil {
return "", err
}
if composer.Image == "" {
if _, err := fmt.Sscanf(message, "Successfully built %s", &composer.Image); err != nil {
return "", err
}
}
}
for _, port := range composer.Ports {
var (
rawPort = port
hostIp = ""
hostPort = ""
containerPort = ""
proto = "tcp"
)
if i := strings.LastIndex(port, "/"); i != -1 {
proto = strings.ToLower(port[i+1:])
port = port[:i]
}
parts := strings.Split(port, ":")
switch len(parts) {
case 1:
containerPort = parts[0]
case 2:
hostPort = parts[0]
containerPort = parts[1]
case 3:
hostIp = parts[0]
hostPort = parts[1]
containerPort = parts[2]
default:
return "", fmt.Errorf("Invalid port specification: %s", rawPort)
}
port := fmt.Sprintf("%s/%s", containerPort, proto)
if _, exists := exposedPorts[port]; !exists {
exposedPorts[port] = struct{}{}
}
portBinding := api.PortBinding{
HostIp: hostIp,
HostPort: hostPort,
}
bslice, exists := portBindings[port]
if !exists {
bslice = []api.PortBinding{}
}
portBindings[port] = append(bslice, portBinding)
}
for _, port := range composer.ExposedPorts {
var (
rawPort = port
containerPort = ""
proto = "tcp"
)
parts := strings.Split(containerPort, "/")
switch len(parts) {
case 1:
containerPort = parts[0]
case 2:
containerPort = parts[0]
proto = strings.ToLower(parts[1])
default:
return "", fmt.Errorf("Invalid port specification: %s", rawPort)
}
port := fmt.Sprintf("%s/%s", containerPort, proto)
if _, exists := exposedPorts[port]; !exists {
exposedPorts[port] = struct{}{}
}
}
for _, volume := range composer.Volumes {
if arr := strings.Split(volume, ":"); len(arr) > 1 {
if arr[1] == "/" {
return "", fmt.Errorf("Invalid bind mount: destination can't be '/'")
}
if !filepath.IsAbs(arr[0]) {
return "", fmt.Errorf("Invalid bind mount: the host path must be absolute.")
}
bindVolumes = append(bindVolumes, volume)
} else if volume == "/" {
return "", fmt.Errorf("Invalid volume: path can't be '/'")
} else {
localVolumes[volume] = struct{}{}
}
}
for _, link := range append(composer.Links, composer.ExternalLinks...) {
arr := strings.Split(link, ":")
if len(arr) < 2 {
links = append(links, arr[0]+":"+arr[0])
} else {
links = append(links, link)
}
}
for _, device := range composer.Devices {
src := ""
dst := ""
permissions := "rwm"
arr := strings.Split(device, ":")
switch len(arr) {
case 3:
permissions = arr[2]
fallthrough
case 2:
dst = arr[1]
fallthrough
case 1:
src = arr[0]
default:
return "", fmt.Errorf("Invalid device specification: %s", device)
}
if dst == "" {
dst = src
}
deviceMapping := api.DeviceMapping{
PathOnHost: src,
PathInContainer: dst,
CgroupPermissions: permissions,
}
deviceMappings = append(deviceMappings, deviceMapping)
}
parts := strings.Split(composer.RestartPolicy, ":")
restartPolicy := api.RestartPolicy{}
restartPolicy.Name = parts[0]
if (restartPolicy.Name == "on-failure") && (len(parts) == 2) {
count, err := strconv.Atoi(parts[1])
if err != nil {
return "", err
}
restartPolicy.MaximumRetryCount = count
}
config.Hostname = composer.Hostname
config.Domainname = composer.Domainname
config.User = composer.User
config.Memory = composer.Memory
config.MemorySwap = composer.MemorySwap
config.CpuShares = composer.CpuShares
config.Cpuset = composer.Cpuset
config.ExposedPorts = exposedPorts
config.Tty = composer.Tty
config.OpenStdin = composer.OpenStdin
config.Env = composer.Env
config.Cmd = composer.Cmd
config.Image = composer.Image
config.Volumes = localVolumes
config.WorkingDir = composer.WorkingDir
if composer.Entrypoint != "" {
config.Entrypoint = strings.Split(composer.Entrypoint, ",")
}
config.MacAddress = composer.MacAddress
hostConfig.Binds = bindVolumes
hostConfig.Privileged = composer.Privileged
hostConfig.PortBindings = portBindings
hostConfig.Links = links
hostConfig.PublishAllPorts = composer.PublishAllPorts
hostConfig.Dns = composer.Dns
hostConfig.DnsSearch = composer.DnsSearch
hostConfig.ExtraHosts = composer.ExtraHosts
hostConfig.VolumesFrom = composer.VolumesFrom
hostConfig.Devices = deviceMappings
hostConfig.NetworkMode = composer.NetworkMode
hostConfig.IpcMode = composer.IpcMode
hostConfig.PidMode = composer.PidMode
hostConfig.CapAdd = composer.CapAdd
hostConfig.CapDrop = composer.CapDrop
hostConfig.RestartPolicy = restartPolicy
hostConfig.SecurityOpt = composer.SecurityOpt
hostConfig.ReadonlyRootfs = composer.ReadonlyRootfs
var cid string
cid, err = docker.CreateContainer(composer.Name, config, hostConfig)
if err != nil {
if apiErr, ok := err.(api.Error); ok && (apiErr.StatusCode == 404) {
if _, err := docker.PullImage(config.Image); err != nil {
return "", err
}
cid, err = docker.CreateContainer(composer.Name, config, hostConfig)
if err != nil {
return "", err
}
} else {
return "", err
}
}
return cid, nil
}
func mergeComposeFlags(ctx *cobra.Command, composer Composer) Composer {
if composeFlags.Name != "" {
composer.Name = composeFlags.Name
}
if len(composeFlags.Ports) > 0 {
composer.Ports = composeFlags.Ports
}
if len(composeFlags.Volumes) > 0 {
composer.Volumes = composeFlags.Volumes
}
if composeFlags.Hostname != "" {
composer.Hostname = composeFlags.Hostname
}
if composeFlags.Domainname != "" {
composer.Domainname = composeFlags.Domainname
}
if composeFlags.User != "" {
composer.User = composeFlags.User
}
if composeFlags.Memory != 0 {
composer.Memory = composeFlags.Memory
}
if composeFlags.MemorySwap != 0 {
composer.MemorySwap = composeFlags.MemorySwap
}
if composeFlags.CpuShares != 0 {
composer.CpuShares = composeFlags.CpuShares
}
if composeFlags.Cpuset != "" {
composer.Cpuset = composeFlags.Cpuset
}
if len(composeFlags.ExposedPorts) > 0 {
composer.ExposedPorts = composeFlags.ExposedPorts
}
if ctx.Flags().Lookup("tty").Changed {
composer.Tty = composeFlags.Tty
}
if ctx.Flags().Lookup("interactive").Changed {
composer.OpenStdin = composeFlags.OpenStdin
}
if len(composeFlags.Env) > 0 {
composer.Env = composeFlags.Env
}
if len(composeFlags.Cmd) > 0 {
composer.Cmd = composeFlags.Cmd
}
if composeFlags.WorkingDir != "" {
composer.WorkingDir = composeFlags.WorkingDir
}
if composeFlags.Entrypoint != "" {
composer.Entrypoint = composeFlags.Entrypoint
}
if composeFlags.MacAddress != "" {
composer.MacAddress = composeFlags.MacAddress
}
if ctx.Flags().Lookup("privileged").Changed {
composer.Privileged = composeFlags.Privileged
}
if len(composeFlags.Links) > 0 {
composer.Links = composeFlags.Links
}
if ctx.Flags().Lookup("publish-all").Changed {
composer.PublishAllPorts = composeFlags.PublishAllPorts
}
if len(composeFlags.Dns) > 0 {
composer.Dns = composeFlags.Dns
}
if len(composeFlags.DnsSearch) > 0 {
composer.DnsSearch = composeFlags.DnsSearch
}
if len(composeFlags.ExtraHosts) > 0 {
composer.ExtraHosts = composeFlags.ExtraHosts
}
if len(composeFlags.VolumesFrom) > 0 {
composer.VolumesFrom = composeFlags.VolumesFrom
}
if len(composeFlags.Devices) > 0 {
composer.Devices = composeFlags.Devices
}
if composeFlags.NetworkMode != "" {
composer.NetworkMode = composeFlags.NetworkMode
}
if composeFlags.IpcMode != "" {
composer.IpcMode = composeFlags.IpcMode
}
if composeFlags.PidMode != "" {
composer.PidMode = composeFlags.PidMode
}
if len(composeFlags.CapAdd) > 0 {
composer.CapAdd = composeFlags.CapAdd
}
if len(composeFlags.CapDrop) > 0 {
composer.CapDrop = composeFlags.CapDrop
}
if composeFlags.RestartPolicy != "" {
composer.RestartPolicy = composeFlags.RestartPolicy
}
if len(composeFlags.SecurityOpt) > 0 {
composer.SecurityOpt = composeFlags.SecurityOpt
}
if ctx.Flags().Lookup("read-only").Changed {
composer.ReadonlyRootfs = composeFlags.ReadonlyRootfs
}
return composer
}