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/
app_add.go
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/
app_add.go
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// Copyright 2016 The rkt Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"github.com/rkt/rkt/common"
pkgPod "github.com/rkt/rkt/pkg/pod"
"github.com/rkt/rkt/rkt/image"
"github.com/rkt/rkt/stage0"
"github.com/rkt/rkt/store/imagestore"
"github.com/rkt/rkt/store/treestore"
"github.com/spf13/cobra"
)
var (
cmdAppAdd = &cobra.Command{
Use: "add UUID IMAGEID ...",
Short: "Add an app to a pod",
Long: "This adds an application available in the local image store to a running mutable pod.",
Run: runWrapper(runAppAdd),
}
)
func init() {
cmdApp.AddCommand(cmdAppAdd)
addAppFlags(cmdAppAdd)
addIsolatorFlags(cmdAppAdd, false)
// Add per-app volume mounts only for sandbox for now
cmdAppAdd.Flags().Var((*appMountVolume)(&rktApps), "mnt-volume", "Configure a per-app mount and volume directly")
// Disable interspersed flags to stop parsing after the first non flag
// argument. All the subsequent parsing will be done by parseApps.
// This is needed to correctly handle image args
cmdAppAdd.Flags().SetInterspersed(false)
}
func runAppAdd(cmd *cobra.Command, args []string) (exit int) {
if len(args) < 2 {
stderr.Print("must provide the pod UUID and an IMAGEID")
return 254
}
err := parseApps(&rktApps, args[1:], cmd.Flags(), true)
if err != nil {
stderr.PrintE("error parsing app image arguments", err)
return 254
}
if rktApps.Count() > 1 {
stderr.Print("must give only one app")
return 254
}
p, err := pkgPod.PodFromUUIDString(getDataDir(), args[0])
if err != nil {
stderr.PrintE("problem retrieving pod", err)
return 254
}
defer p.Close()
if p.State() != pkgPod.Running {
stderr.Printf("pod %q isn't currently running", p.UUID)
return 254
}
if !p.IsSupervisorReady() {
stderr.Printf("supervisor for pod %q is not yet ready", p.UUID)
return 254
}
s, err := imagestore.NewStore(storeDir())
if err != nil {
stderr.PrintE("cannot open store", err)
return 254
}
ts, err := treestore.NewStore(treeStoreDir(), s)
if err != nil {
stderr.PrintE("cannot open treestore", err)
return 254
}
fn := &image.Finder{
S: s,
Ts: ts,
Ks: getKeystore(),
PullPolicy: image.PullPolicyNever,
}
img, err := fn.FindImage(args[1], "")
if err != nil {
stderr.PrintE("error finding images", err)
return 254
}
rktApps.Last().ImageID = *img
podPID, err := p.ContainerPid1()
if err != nil {
stderr.PrintE(fmt.Sprintf("unable to determine the pid for pod %q", p.UUID), err)
return 254
}
ccfg := stage0.CommonConfig{
DataDir: getDataDir(),
Store: s,
TreeStore: ts,
UUID: p.UUID,
Debug: globalFlags.Debug,
}
rktgid, err := common.LookupGid(common.RktGroup)
if err != nil {
stderr.Printf("group %q not found, will use default gid when rendering images", common.RktGroup)
rktgid = -1
}
cfg := stage0.AddConfig{
CommonConfig: &ccfg,
Image: *img,
Apps: &rktApps,
RktGid: rktgid,
UsesOverlay: p.UsesOverlay(),
PodPath: p.Path(),
PodPID: podPID,
}
if globalFlags.Debug {
stage0.InitDebug()
}
err = stage0.AddApp(cfg)
if err != nil {
stderr.PrintE("error adding app to pod", err)
return 254
}
return 0
}