func prepareInfo(config *startConfig, c *pod.UserContainer, vmId string) (*hypervisor.ContainerInfo, error) {
var root string
var err error
containerId := GenerateRandomID()
sharedDir := filepath.Join(hypervisor.BaseDir, vmId, hypervisor.ShareDirTag)
rootDir := filepath.Join(sharedDir, containerId)
os.MkdirAll(rootDir, 0755)
rootDir = filepath.Join(rootDir, "rootfs")
if !filepath.IsAbs(c.Image) {
root = filepath.Join(config.BundlePath, c.Image)
} else {
root = c.Image
}
err = utils.Mount(root, rootDir)
if err != nil {
fmt.Printf("mount %s to %s failed: %s\n", root, rootDir, err.Error())
return nil, err
}
containerInfo := &hypervisor.ContainerInfo{
Id: containerId,
Rootfs: "rootfs",
Image: containerId,
Fstype: "dir",
}
return containerInfo, nil
}
func (c *Container) create(p *Process) error {
// save the state
glog.V(3).Infof("prepare hypervisor info")
config := api.ContainerDescriptionFromOCF(c.Id, c.Spec)
rootPath := c.Spec.Root.Path
if !filepath.IsAbs(rootPath) {
rootPath = filepath.Join(c.BundlePath, rootPath)
}
vmRootfs := filepath.Join(hypervisor.BaseDir, c.ownerPod.vm.Id, hypervisor.ShareDirTag, c.Id, "rootfs")
os.MkdirAll(vmRootfs, 0755)
// Mount rootfs
err := utils.Mount(rootPath, vmRootfs)
if err != nil {
glog.Errorf("mount %s to %s failed: %s\n", rootPath, vmRootfs, err.Error())
return err
}
// Pre-create dirs necessary for hyperstart before setting rootfs readonly
// TODO: a better way to support readonly rootfs
if err = preCreateDirs(rootPath); err != nil {
return err
}
// Mount necessary files and directories from spec
for _, m := range c.Spec.Mounts {
if err := mountToRootfs(&m, vmRootfs, ""); err != nil {
return fmt.Errorf("mounting %q to rootfs %q at %q failed: %v", m.Source, m.Destination, vmRootfs, err)
}
}
// set rootfs readonly
if c.Spec.Root.Readonly {
err = utils.SetReadonly(vmRootfs)
if err != nil {
glog.Errorf("set rootfs %s readonly failed: %s\n", vmRootfs, err.Error())
return err
}
}
r := c.ownerPod.vm.AddContainer(config)
if !r.IsSuccess() {
return fmt.Errorf("add container %s failed: %s", c.Id, r.Message())
}
return nil
}
func (c *Container) start(p *Process) error {
// save the state
glog.V(3).Infof("save state id %s, boundle %s", c.Id, c.BundlePath)
stateDir := filepath.Join(c.ownerPod.sv.StateDir, c.Id)
_, err := os.Stat(stateDir)
if err == nil {
glog.V(1).Infof("Container %s exists\n", c.Id)
return fmt.Errorf("Container %s exists\n", c.Id)
}
err = os.MkdirAll(stateDir, 0644)
if err != nil {
glog.V(1).Infof("%s\n", err.Error())
return err
}
state := &specs.State{
Version: c.Spec.Version,
ID: c.Id,
Pid: c.ownerPod.getNsPid(),
BundlePath: c.BundlePath,
}
stateData, err := json.MarshalIndent(state, "", "\t")
if err != nil {
glog.V(1).Infof("%s\n", err.Error())
return err
}
stateFile := filepath.Join(stateDir, "state.json")
err = ioutil.WriteFile(stateFile, stateData, 0644)
if err != nil {
glog.V(1).Infof("%s\n", err.Error())
return err
}
glog.V(3).Infof("prepare hypervisor info")
u := pod.ConvertOCF2UserContainer(c.Spec)
if !filepath.IsAbs(u.Image) {
u.Image = filepath.Join(c.BundlePath, u.Image)
}
vmRootfs := filepath.Join(hypervisor.BaseDir, c.ownerPod.vm.Id, hypervisor.ShareDirTag, c.Id, "rootfs")
os.MkdirAll(vmRootfs, 0755)
// Mount rootfs
err = utils.Mount(u.Image, vmRootfs)
if err != nil {
glog.Errorf("mount %s to %s failed: %s\n", u.Image, vmRootfs, err.Error())
return err
}
// Pre-create dirs necessary for hyperstart before setting rootfs readonly
// TODO: a better way to support readonly rootfs
if err = preCreateDirs(u.Image); err != nil {
return err
}
// Mount necessary files and directories from spec
for _, m := range c.Spec.Mounts {
if err := mountToRootfs(&m, vmRootfs, ""); err != nil {
return fmt.Errorf("mounting %q to rootfs %q at %q failed: %v", m.Source, vmRootfs, m.Destination, err)
}
}
// set rootfs readonly
if c.Spec.Root.Readonly {
err = utils.SetReadonly(vmRootfs)
if err != nil {
glog.Errorf("set rootfs %s readonly failed: %s\n", vmRootfs, err.Error())
return err
}
}
envs := make(map[string]string)
for _, env := range u.Envs {
envs[env.Env] = env.Value
}
info := &hypervisor.ContainerInfo{
Id: c.Id,
Rootfs: "rootfs",
Image: pod.UserVolume{Source: c.Id},
Fstype: "dir",
Cmd: u.Command,
Envs: envs,
}
err = c.ownerPod.vm.Attach(p.stdio, c.Id, nil)
if err != nil {
glog.V(1).Infof("StartPod fail: fail to set up tty connection.\n")
return err
}
err = execPrestartHooks(c.Spec, state)
if err != nil {
glog.V(1).Infof("execute Prestart hooks failed, %s\n", err.Error())
return err
}
err = c.ownerPod.initPodNetwork(c)
if err != nil {
glog.Errorf("fail to initialize pod network %v", err)
return err
}
c.ownerPod.podStatus.AddContainer(c.Id, c.ownerPod.podStatus.Id, "", []string{}, types.S_POD_CREATED)
return c.ownerPod.vm.NewContainer(u, info)
}