// setApp merges the container spec with the image's manifest.
func setApp(app *appctypes.App, c *api.Container, opts *kubecontainer.RunContainerOptions, ctx *api.SecurityContext, podCtx *api.PodSecurityContext) error {
// TODO(yifan): If ENTRYPOINT and CMD are both specified in the image,
// we cannot override just one of these at this point as they are already mixed.
command, args := kubecontainer.ExpandContainerCommandAndArgs(c, opts.Envs)
exec := append(command, args...)
if len(exec) > 0 {
app.Exec = exec
}
// Set UID and GIDs.
if err := verifyNonRoot(app, ctx); err != nil {
return err
}
if ctx != nil && ctx.RunAsUser != nil {
app.User = strconv.Itoa(int(*ctx.RunAsUser))
}
setSupplementaryGIDs(app, podCtx)
// Set working directory.
if len(c.WorkingDir) > 0 {
app.WorkingDirectory = c.WorkingDir
}
// Notes that we don't create Mounts section in the pod manifest here,
// as Mounts will be automatically generated by rkt.
mergeMounts(app, opts.Mounts)
mergeEnv(app, opts.Envs)
mergePortMappings(app, opts.PortMappings)
return setIsolators(app, c, ctx)
}
// setApp merges the container spec with the image's manifest.
func setApp(app *appctypes.App, c *api.Container, opts *kubecontainer.RunContainerOptions, ctx *api.SecurityContext, podCtx *api.PodSecurityContext) error {
// Override the exec.
if len(c.Command) > 0 {
app.Exec = c.Command
}
if len(c.Args) > 0 {
app.Exec = append(app.Exec, c.Args...)
}
// Set UID and GIDs.
if err := verifyNonRoot(app, ctx); err != nil {
return err
}
if ctx != nil && ctx.RunAsUser != nil {
app.User = strconv.Itoa(int(*ctx.RunAsUser))
}
setSupplementaryGIDs(app, podCtx)
// Set working directory.
if len(c.WorkingDir) > 0 {
app.WorkingDirectory = c.WorkingDir
}
// Notes that we don't create Mounts section in the pod manifest here,
// as Mounts will be automatically generated by rkt.
mergeMounts(app, opts.Mounts)
mergeEnv(app, opts.Envs)
mergePortMappings(app, opts.PortMappings)
return setIsolators(app, c, ctx)
}
func (this *oci2rkt) genImageManifest() {
// 1. Assemble "acKind" field
this.imageManifest.ACKind = "ImageManifest"
// 2. Assemble "acVersion" field
this.imageManifest.ACVersion = schema.AppContainerVersion
// 3. Assemble "name" field
this.imageManifest.Name = "oci"
// 4. Assemble "labels" field
// 4.1 "version"
label := new(types.Label)
label.Name = types.ACIdentifier("version")
label.Value = this.linuxSpec.Version
this.imageManifest.Labels = append(this.imageManifest.Labels, *label)
// 4.2 "os"
label = new(types.Label)
label.Name = types.ACIdentifier("os")
label.Value = this.linuxSpec.Platform.OS
this.imageManifest.Labels = append(this.imageManifest.Labels, *label)
// 4.3 "arch"
label = new(types.Label)
label.Name = types.ACIdentifier("arch")
label.Value = this.linuxSpec.Platform.Arch
this.imageManifest.Labels = append(this.imageManifest.Labels, *label)
// 5. Assemble "app" field
app := new(types.App)
// 5.1 "exec"
//fmt.Printf("this.linuxSpec.Process.Args=%v\n", this.linuxSpec.Process.Args)
app.Exec = this.linuxSpec.Process.Args
// 5.2 "user"
app.User = fmt.Sprintf("%d", this.linuxSpec.Process.User.UID)
// 5.3 "group"
app.Group = fmt.Sprintf("%d", this.linuxSpec.Process.User.GID)
this.imageManifest.App = app
}
func genManifest(path string) *schema.ImageManifest {
// Get runtime.json and config.json
runtimePath := path + "/runtime.json"
configPath := path + "/config.json"
runtime, err := ioutil.ReadFile(runtimePath)
if err != nil {
if debugEnabled {
log.Printf("Open file runtime.json failed: %v", err)
}
return nil
}
config, err := ioutil.ReadFile(configPath)
if err != nil {
if debugEnabled {
log.Printf("Open file config.json failed: %v", err)
}
return nil
}
var spec specs.LinuxSpec
err = json.Unmarshal(config, &spec)
if err != nil {
if debugEnabled {
log.Printf("Unmarshal config.json failed: %v", err)
}
return nil
}
var runSpec specs.LinuxRuntimeSpec
err = json.Unmarshal(runtime, &runSpec)
if err != nil {
if debugEnabled {
log.Printf("Unmarshal runtime.json failed: %v", err)
}
return nil
}
// Begin to convert runtime.json/config.json to manifest
m := new(schema.ImageManifest)
// 1. Assemble "acKind" field
m.ACKind = schema.ImageManifestKind
// 2. Assemble "acVersion" field
m.ACVersion = schema.AppContainerVersion
// 3. Assemble "name" field
m.Name = types.ACIdentifier(manifestName)
// 4. Assemble "labels" field
// 4.1 "version"
label := new(types.Label)
label.Name = types.ACIdentifier("version")
label.Value = spec.Version
m.Labels = append(m.Labels, *label)
// 4.2 "os"
label = new(types.Label)
label.Name = types.ACIdentifier("os")
label.Value = spec.Platform.OS
m.Labels = append(m.Labels, *label)
// 4.3 "arch"
label = new(types.Label)
label.Name = types.ACIdentifier("arch")
label.Value = spec.Platform.Arch
m.Labels = append(m.Labels, *label)
// 5. Assemble "app" field
app := new(types.App)
// 5.1 "exec"
app.Exec = spec.Process.Args
prefixDir := ""
//var exeStr string
if app.Exec == nil {
app.Exec = append(app.Exec, "/bin/sh")
} else {
if !filepath.IsAbs(app.Exec[0]) {
if spec.Process.Cwd == "" {
prefixDir = "/"
} else {
prefixDir = spec.Process.Cwd
}
}
app.Exec[0] = prefixDir + app.Exec[0]
}
// 5.2 "user"
app.User = fmt.Sprintf("%d", spec.Process.User.UID)
// 5.3 "group"
app.Group = fmt.Sprintf("%d", spec.Process.User.GID)
// 5.4 "eventHandlers"
event := new(types.EventHandler)
event.Name = "pre-start"
for index := range runSpec.Hooks.Prestart {
event.Exec = append(event.Exec, runSpec.Hooks.Prestart[index].Path)
event.Exec = append(event.Exec, runSpec.Hooks.Prestart[index].Args...)
event.Exec = append(event.Exec, runSpec.Hooks.Prestart[index].Env...)
}
if len(event.Exec) == 0 {
event.Exec = append(event.Exec, "/bin/echo")
event.Exec = append(event.Exec, "-n")
}
app.EventHandlers = append(app.EventHandlers, *event)
event = new(types.EventHandler)
event.Name = "post-stop"
for index := range runSpec.Hooks.Poststop {
event.Exec = append(event.Exec, runSpec.Hooks.Poststop[index].Path)
event.Exec = append(event.Exec, runSpec.Hooks.Poststop[index].Args...)
event.Exec = append(event.Exec, runSpec.Hooks.Poststop[index].Env...)
}
if len(event.Exec) == 0 {
event.Exec = append(event.Exec, "/bin/echo")
event.Exec = append(event.Exec, "-n")
}
app.EventHandlers = append(app.EventHandlers, *event)
// 5.5 "workingDirectory"
app.WorkingDirectory = spec.Process.Cwd
// 5.6 "environment"
env := new(types.EnvironmentVariable)
for index := range spec.Process.Env {
s := strings.Split(spec.Process.Env[index], "=")
env.Name = s[0]
env.Value = s[1]
app.Environment = append(app.Environment, *env)
}
// 5.7 "mountPoints"
for index := range spec.Mounts {
mount := new(types.MountPoint)
mount.Name = types.ACName(spec.Mounts[index].Name)
mount.Path = spec.Mounts[index].Path
mount.ReadOnly = false
app.MountPoints = append(app.MountPoints, *mount)
}
// 5.8 "ports"
// 5.9 "isolators"
if runSpec.Linux.Resources != nil {
if runSpec.Linux.Resources.CPU.Quota != 0 {
cpuLimt := new(ResourceCPU)
cpuLimt.Limit = fmt.Sprintf("%dm", runSpec.Linux.Resources.CPU.Quota)
isolator := new(types.Isolator)
isolator.Name = types.ACIdentifier("resource/cpu")
bytes, _ := json.Marshal(cpuLimt)
valueRaw := json.RawMessage(bytes)
isolator.ValueRaw = &valueRaw
app.Isolators = append(app.Isolators, *isolator)
}
if runSpec.Linux.Resources.Memory.Limit != 0 {
memLimt := new(ResourceMem)
memLimt.Limit = fmt.Sprintf("%dG", runSpec.Linux.Resources.Memory.Limit/(1024*1024*1024))
isolator := new(types.Isolator)
isolator.Name = types.ACIdentifier("resource/memory")
bytes, _ := json.Marshal(memLimt)
valueRaw := json.RawMessage(bytes)
isolator.ValueRaw = &valueRaw
app.Isolators = append(app.Isolators, *isolator)
}
}
if len(spec.Linux.Capabilities) != 0 {
isolatorCapSet := new(IsolatorCapSet)
isolatorCapSet.Sets = append(isolatorCapSet.Sets, spec.Linux.Capabilities...)
isolator := new(types.Isolator)
isolator.Name = types.ACIdentifier(types.LinuxCapabilitiesRetainSetName)
bytes, _ := json.Marshal(isolatorCapSet)
valueRaw := json.RawMessage(bytes)
isolator.ValueRaw = &valueRaw
app.Isolators = append(app.Isolators, *isolator)
}
// 6. "annotations"
// 7. "dependencies"
// 8. "pathWhitelist"
m.App = app
return m
}
func patchManifest(im *schema.ImageManifest) error {
if patchName != "" {
name, err := types.NewACIdentifier(patchName)
if err != nil {
return err
}
im.Name = *name
}
var app *types.App = im.App
if patchExec != "" {
if app == nil {
// if the original manifest was missing an app and
// patchExec is set let's assume the user is trying to
// inject one...
im.App = &types.App{}
app = im.App
}
app.Exec = strings.Split(patchExec, " ")
}
if patchUser != "" ||
patchGroup != "" ||
patchSupplementaryGIDs != "" ||
patchCaps != "" ||
patchRevokeCaps != "" ||
patchMounts != "" ||
patchPorts != "" ||
patchIsolators != "" {
// ...but if we still don't have an app and the user is trying
// to patch one of its other parameters, it's an error
if app == nil {
return fmt.Errorf("no app in the supplied manifest and no exec command provided")
}
}
if patchUser != "" {
app.User = patchUser
}
if patchGroup != "" {
app.Group = patchGroup
}
if patchSupplementaryGIDs != "" {
app.SupplementaryGIDs = []int{}
gids := strings.Split(patchSupplementaryGIDs, ",")
for _, g := range gids {
gid, err := strconv.Atoi(g)
if err != nil {
return fmt.Errorf("invalid supplementary group %q: %v", g, err)
}
app.SupplementaryGIDs = append(app.SupplementaryGIDs, gid)
}
}
if patchCaps != "" {
isolator := app.Isolators.GetByName(types.LinuxCapabilitiesRetainSetName)
if isolator != nil {
return fmt.Errorf("isolator already exists (os/linux/capabilities-retain-set)")
}
// Instantiate a Isolator with the content specified by the --capability
// parameter.
caps, err := types.NewLinuxCapabilitiesRetainSet(strings.Split(patchCaps, ",")...)
if err != nil {
return fmt.Errorf("cannot parse capability %q: %v", patchCaps, err)
}
app.Isolators = append(app.Isolators, caps.AsIsolator())
}
if patchRevokeCaps != "" {
isolator := app.Isolators.GetByName(types.LinuxCapabilitiesRevokeSetName)
if isolator != nil {
return fmt.Errorf("isolator already exists (os/linux/capabilities-remove-set)")
}
// Instantiate a Isolator with the content specified by the --revoke-capability
// parameter.
caps, err := types.NewLinuxCapabilitiesRevokeSet(strings.Split(patchRevokeCaps, ",")...)
if err != nil {
return fmt.Errorf("cannot parse capability %q: %v", patchRevokeCaps, err)
}
app.Isolators = append(app.Isolators, caps.AsIsolator())
}
if patchMounts != "" {
mounts := strings.Split(patchMounts, ":")
for _, m := range mounts {
mountPoint, err := types.MountPointFromString(m)
if err != nil {
return fmt.Errorf("cannot parse mount point %q: %v", m, err)
}
app.MountPoints = append(app.MountPoints, *mountPoint)
}
}
if patchPorts != "" {
ports := strings.Split(patchPorts, ":")
for _, p := range ports {
port, err := types.PortFromString(p)
if err != nil {
return fmt.Errorf("cannot parse port %q: %v", p, err)
}
app.Ports = append(app.Ports, *port)
}
}
if patchIsolators != "" {
isolators := strings.Split(patchIsolators, ":")
for _, is := range isolators {
name, isolatorStr, err := isolatorStrFromString(is)
if err != nil {
return fmt.Errorf("cannot parse isolator %q: %v", is, err)
}
if _, ok := types.ResourceIsolatorNames[name]; !ok {
return fmt.Errorf("isolator %s is not supported for patching", name)
}
isolator := &types.Isolator{}
if err := isolator.UnmarshalJSON([]byte(isolatorStr)); err != nil {
return fmt.Errorf("cannot unmarshal isolator %v: %v", isolatorStr, err)
}
app.Isolators = append(app.Isolators, *isolator)
}
}
return nil
}
func patchManifest(im *schema.ImageManifest) error {
if patchName != "" {
name, err := types.NewACIdentifier(patchName)
if err != nil {
return err
}
im.Name = *name
}
var app *types.App = im.App
if patchExec != "" {
if app == nil {
// if the original manifest was missing an app and
// patchExec is set let's assume the user is trying to
// inject one...
im.App = &types.App{}
app = im.App
}
app.Exec = strings.Split(patchExec, " ")
}
if patchUser != "" || patchGroup != "" || patchSupplementaryGIDs != "" || patchCaps != "" || patchMounts != "" || patchPorts != "" || patchIsolators != "" {
// ...but if we still don't have an app and the user is trying
// to patch one of its other parameters, it's an error
if app == nil {
return fmt.Errorf("no app in the supplied manifest and no exec command provided")
}
}
if patchUser != "" {
app.User = patchUser
}
if patchGroup != "" {
app.Group = patchGroup
}
if patchSupplementaryGIDs != "" {
app.SupplementaryGIDs = []int{}
gids := strings.Split(patchSupplementaryGIDs, ",")
for _, g := range gids {
gid, err := strconv.Atoi(g)
if err != nil {
return fmt.Errorf("invalid supplementary group %q: %v", g, err)
}
app.SupplementaryGIDs = append(app.SupplementaryGIDs, gid)
}
}
if patchCaps != "" {
isolator := app.Isolators.GetByName(types.LinuxCapabilitiesRetainSetName)
if isolator != nil {
return fmt.Errorf("isolator already exists")
}
// Instantiate a Isolator with the content specified by the --capability
// parameter.
// TODO: Instead of creating a JSON and then unmarshalling it, the isolator
// should be instantiated directory. But it requires a constructor, see:
// https://github.com/appc/spec/issues/268
capsList := strings.Split(patchCaps, ",")
caps := fmt.Sprintf(`"set": ["%s"]`, strings.Join(capsList, `", "`))
isolatorStr := getIsolatorStr(types.LinuxCapabilitiesRetainSetName, caps)
isolator = &types.Isolator{}
err := isolator.UnmarshalJSON([]byte(isolatorStr))
if err != nil {
return fmt.Errorf("cannot parse capability %q: %v", patchCaps, err)
}
app.Isolators = append(app.Isolators, *isolator)
}
if patchMounts != "" {
mounts := strings.Split(patchMounts, ":")
for _, m := range mounts {
mountPoint, err := types.MountPointFromString(m)
if err != nil {
return fmt.Errorf("cannot parse mount point %q: %v", m, err)
}
app.MountPoints = append(app.MountPoints, *mountPoint)
}
}
if patchPorts != "" {
ports := strings.Split(patchPorts, ":")
for _, p := range ports {
port, err := types.PortFromString(p)
if err != nil {
return fmt.Errorf("cannot parse port %q: %v", p, err)
}
app.Ports = append(app.Ports, *port)
}
}
if patchIsolators != "" {
isolators := strings.Split(patchIsolators, ":")
for _, is := range isolators {
name, isolatorStr, err := isolatorStrFromString(is)
if err != nil {
return fmt.Errorf("cannot parse isolator %q: %v", is, err)
}
if _, ok := types.ResourceIsolatorNames[name]; !ok {
return fmt.Errorf("isolator %s is not supported for patching", name)
}
isolator := &types.Isolator{}
if err := isolator.UnmarshalJSON([]byte(isolatorStr)); err != nil {
return fmt.Errorf("cannot unmarshal isolator %v: %v", isolatorStr, err)
}
app.Isolators = append(app.Isolators, *isolator)
}
}
return nil
}
func patchManifest(im *schema.ImageManifest) error {
if patchName != "" {
name, err := types.NewACIdentifier(patchName)
if err != nil {
return err
}
im.Name = *name
}
var app *types.App = im.App
if patchExec != "" {
if app == nil {
// if the original manifest was missing an app and
// patchExec is set let's assume the user is trying to
// inject one...
im.App = &types.App{}
app = im.App
}
app.Exec = strings.Split(patchExec, " ")
}
if patchUser != "" ||
patchGroup != "" ||
patchSupplementaryGIDs != "" ||
patchCaps != "" ||
patchRevokeCaps != "" ||
patchMounts != "" ||
patchPorts != "" ||
patchIsolators != "" {
// ...but if we still don't have an app and the user is trying
// to patch one of its other parameters, it's an error
if app == nil {
return fmt.Errorf("no app in the supplied manifest and no exec command provided")
}
}
if patchUser != "" {
app.User = patchUser
}
if patchGroup != "" {
app.Group = patchGroup
}
if patchSupplementaryGIDs != "" {
app.SupplementaryGIDs = []int{}
gids := strings.Split(patchSupplementaryGIDs, ",")
for _, g := range gids {
gid, err := strconv.Atoi(g)
if err != nil {
return fmt.Errorf("invalid supplementary group %q: %v", g, err)
}
app.SupplementaryGIDs = append(app.SupplementaryGIDs, gid)
}
}
if patchCaps != "" {
isolator := app.Isolators.GetByName(types.LinuxCapabilitiesRetainSetName)
if isolator != nil {
return fmt.Errorf("isolator already exists (os/linux/capabilities-retain-set)")
}
// Instantiate a Isolator with the content specified by the --capability
// parameter.
caps, err := types.NewLinuxCapabilitiesRetainSet(strings.Split(patchCaps, ",")...)
if err != nil {
return fmt.Errorf("cannot parse capability %q: %v", patchCaps, err)
}
isolator, err = caps.AsIsolator()
if err != nil {
return err
}
app.Isolators = append(app.Isolators, *isolator)
}
if patchRevokeCaps != "" {
isolator := app.Isolators.GetByName(types.LinuxCapabilitiesRevokeSetName)
if isolator != nil {
return fmt.Errorf("isolator already exists (os/linux/capabilities-remove-set)")
}
// Instantiate a Isolator with the content specified by the --revoke-capability
// parameter.
caps, err := types.NewLinuxCapabilitiesRevokeSet(strings.Split(patchRevokeCaps, ",")...)
if err != nil {
return fmt.Errorf("cannot parse capability %q: %v", patchRevokeCaps, err)
}
isolator, err = caps.AsIsolator()
if err != nil {
return err
}
app.Isolators = append(app.Isolators, *isolator)
}
if patchMounts != "" {
mounts := strings.Split(patchMounts, ":")
for _, m := range mounts {
mountPoint, err := types.MountPointFromString(m)
if err != nil {
return fmt.Errorf("cannot parse mount point %q: %v", m, err)
}
app.MountPoints = append(app.MountPoints, *mountPoint)
}
}
if patchPorts != "" {
ports := strings.Split(patchPorts, ":")
for _, p := range ports {
port, err := types.PortFromString(p)
if err != nil {
return fmt.Errorf("cannot parse port %q: %v", p, err)
}
app.Ports = append(app.Ports, *port)
}
}
// Parse seccomp args and override existing seccomp isolators
if patchSeccompMode != "" {
seccompIsolator, err := parseSeccompArgs(patchSeccompMode, patchSeccompSet)
if err != nil {
return err
}
seccompReps := []types.ACIdentifier{types.LinuxSeccompRemoveSetName, types.LinuxSeccompRetainSetName}
app.Isolators.ReplaceIsolatorsByName(*seccompIsolator, seccompReps)
} else if patchSeccompSet != "" {
return fmt.Errorf("--seccomp-set specified without --seccomp-mode")
}
if patchIsolators != "" {
isolators := strings.Split(patchIsolators, ":")
for _, is := range isolators {
name, isolatorStr, err := isolatorStrFromString(is)
if err != nil {
return fmt.Errorf("cannot parse isolator %q: %v", is, err)
}
_, ok := types.ResourceIsolatorNames[name]
switch name {
case types.LinuxNoNewPrivilegesName:
ok = true
kv := strings.Split(is, ",")
if len(kv) != 2 {
return fmt.Errorf("isolator %s: invalid format", name)
}
isolatorStr = fmt.Sprintf(`{ "name": "%s", "value": %s }`, name, kv[1])
case types.LinuxSeccompRemoveSetName, types.LinuxSeccompRetainSetName:
ok = false
}
if !ok {
return fmt.Errorf("isolator %s is not supported for patching", name)
}
isolator := &types.Isolator{}
if err := isolator.UnmarshalJSON([]byte(isolatorStr)); err != nil {
return fmt.Errorf("cannot unmarshal isolator %v: %v", isolatorStr, err)
}
app.Isolators = append(app.Isolators, *isolator)
}
}
return nil
}