629 lines
17 KiB
Go
629 lines
17 KiB
Go
package server
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import (
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"encoding/json"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"syscall"
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"github.com/Sirupsen/logrus"
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"github.com/docker/docker/pkg/stringid"
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"github.com/kubernetes-incubator/cri-o/oci"
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"github.com/kubernetes-incubator/cri-o/utils"
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"github.com/opencontainers/runc/libcontainer/label"
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"github.com/opencontainers/runtime-tools/generate"
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"golang.org/x/net/context"
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"k8s.io/kubernetes/pkg/fields"
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pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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)
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func (s *Server) generateContainerIDandName(podName string, name string, attempt uint32) (string, string, error) {
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var (
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err error
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id = stringid.GenerateNonCryptoID()
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)
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nameStr := fmt.Sprintf("%s-%s-%v", podName, name, attempt)
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if name == "infra" {
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nameStr = fmt.Sprintf("%s-%s", podName, name)
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}
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if name, err = s.reserveContainerName(id, nameStr); err != nil {
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return "", "", err
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}
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return id, name, err
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}
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type containerRequest interface {
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GetContainerId() string
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}
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func (s *Server) getContainerFromRequest(req containerRequest) (*oci.Container, error) {
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ctrID := req.GetContainerId()
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if ctrID == "" {
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return nil, fmt.Errorf("container ID should not be empty")
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}
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containerID, err := s.ctrIDIndex.Get(ctrID)
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if err != nil {
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return nil, fmt.Errorf("container with ID starting with %s not found: %v", ctrID, err)
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}
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c := s.state.containers.Get(containerID)
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if c == nil {
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return nil, fmt.Errorf("specified container not found: %s", containerID)
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}
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return c, nil
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}
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// CreateContainer creates a new container in specified PodSandbox
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func (s *Server) CreateContainer(ctx context.Context, req *pb.CreateContainerRequest) (res *pb.CreateContainerResponse, err error) {
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logrus.Debugf("CreateContainerRequest %+v", req)
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sbID := req.GetPodSandboxId()
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if sbID == "" {
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return nil, fmt.Errorf("PodSandboxId should not be empty")
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}
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sandboxID, err := s.podIDIndex.Get(sbID)
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if err != nil {
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return nil, fmt.Errorf("PodSandbox with ID starting with %s not found: %v", sbID, err)
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}
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sb := s.getSandbox(sandboxID)
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if sb == nil {
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return nil, fmt.Errorf("specified sandbox not found: %s", sandboxID)
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}
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// The config of the container
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containerConfig := req.GetConfig()
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if containerConfig == nil {
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return nil, fmt.Errorf("CreateContainerRequest.ContainerConfig is nil")
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}
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name := containerConfig.GetMetadata().GetName()
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if name == "" {
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return nil, fmt.Errorf("CreateContainerRequest.ContainerConfig.Name is empty")
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}
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attempt := containerConfig.GetMetadata().GetAttempt()
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containerID, containerName, err := s.generateContainerIDandName(sb.name, name, attempt)
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if err != nil {
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return nil, err
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}
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// containerDir is the dir for the container bundle.
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containerDir := filepath.Join(s.runtime.ContainerDir(), containerID)
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defer func() {
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if err != nil {
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s.releaseContainerName(containerName)
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err1 := os.RemoveAll(containerDir)
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if err1 != nil {
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logrus.Warnf("Failed to cleanup container directory: %v")
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}
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}
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}()
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if _, err = os.Stat(containerDir); err == nil {
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return nil, fmt.Errorf("container (%s) already exists", containerDir)
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}
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if err = os.MkdirAll(containerDir, 0755); err != nil {
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return nil, err
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}
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container, err := s.createSandboxContainer(containerID, containerName, sb, req.GetSandboxConfig(), containerDir, containerConfig)
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if err != nil {
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return nil, err
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}
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if err = s.runtime.CreateContainer(container); err != nil {
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return nil, err
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}
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if err = s.runtime.UpdateStatus(container); err != nil {
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return nil, err
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}
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s.addContainer(container)
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if err = s.ctrIDIndex.Add(containerID); err != nil {
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s.removeContainer(container)
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return nil, err
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}
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resp := &pb.CreateContainerResponse{
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ContainerId: &containerID,
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}
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logrus.Debugf("CreateContainerResponse: %+v", resp)
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return resp, nil
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}
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func (s *Server) createSandboxContainer(containerID string, containerName string, sb *sandbox, SandboxConfig *pb.PodSandboxConfig, containerDir string, containerConfig *pb.ContainerConfig) (*oci.Container, error) {
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if sb == nil {
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return nil, errors.New("createSandboxContainer needs a sandbox")
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}
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// creates a spec Generator with the default spec.
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specgen := generate.New()
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// by default, the root path is an empty string.
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// here set it to be "rootfs".
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specgen.SetRootPath("rootfs")
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args := containerConfig.GetArgs()
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if args == nil {
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args = []string{"/bin/sh"}
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}
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specgen.SetProcessArgs(args)
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cwd := containerConfig.GetWorkingDir()
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if cwd == "" {
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cwd = "/"
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}
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specgen.SetProcessCwd(cwd)
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envs := containerConfig.GetEnvs()
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if envs != nil {
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for _, item := range envs {
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key := item.GetKey()
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value := item.GetValue()
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if key == "" {
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continue
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}
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env := fmt.Sprintf("%s=%s", key, value)
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specgen.AddProcessEnv(env)
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}
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}
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mounts := containerConfig.GetMounts()
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for _, mount := range mounts {
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dest := mount.GetContainerPath()
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if dest == "" {
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return nil, fmt.Errorf("Mount.ContainerPath is empty")
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}
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src := mount.GetHostPath()
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if src == "" {
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return nil, fmt.Errorf("Mount.HostPath is empty")
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}
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options := "rw"
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if mount.GetReadonly() {
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options = "ro"
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}
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if mount.GetSelinuxRelabel() {
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// Need a way in kubernetes to determine if the volume is shared or private
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if err := label.Relabel(src, sb.mountLabel, true); err != nil && err != syscall.ENOTSUP {
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return nil, fmt.Errorf("relabel failed %s: %v", src, err)
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}
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}
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specgen.AddBindMount(src, dest, options)
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}
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labels := containerConfig.GetLabels()
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metadata := containerConfig.GetMetadata()
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annotations := containerConfig.GetAnnotations()
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if annotations != nil {
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for k, v := range annotations {
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specgen.AddAnnotation(k, v)
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}
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}
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if containerConfig.GetLinux().GetSecurityContext().GetPrivileged() {
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specgen.SetupPrivileged(true)
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}
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if containerConfig.GetLinux().GetSecurityContext().GetReadonlyRootfs() {
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specgen.SetRootReadonly(true)
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}
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logPath := containerConfig.GetLogPath()
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if containerConfig.GetTty() {
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specgen.SetProcessTerminal(true)
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}
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linux := containerConfig.GetLinux()
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if linux != nil {
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resources := linux.GetResources()
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if resources != nil {
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cpuPeriod := resources.GetCpuPeriod()
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if cpuPeriod != 0 {
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specgen.SetLinuxResourcesCPUPeriod(uint64(cpuPeriod))
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}
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cpuQuota := resources.GetCpuQuota()
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if cpuQuota != 0 {
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specgen.SetLinuxResourcesCPUQuota(uint64(cpuQuota))
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}
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cpuShares := resources.GetCpuShares()
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if cpuShares != 0 {
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specgen.SetLinuxResourcesCPUShares(uint64(cpuShares))
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}
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memoryLimit := resources.GetMemoryLimitInBytes()
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if memoryLimit != 0 {
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specgen.SetLinuxResourcesMemoryLimit(uint64(memoryLimit))
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}
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oomScoreAdj := resources.GetOomScoreAdj()
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specgen.SetLinuxResourcesOOMScoreAdj(int(oomScoreAdj))
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}
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capabilities := linux.GetSecurityContext().GetCapabilities()
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if capabilities != nil {
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addCaps := capabilities.GetAddCapabilities()
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if addCaps != nil {
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for _, cap := range addCaps {
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if err := specgen.AddProcessCapability(cap); err != nil {
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return nil, err
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}
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}
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}
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dropCaps := capabilities.GetDropCapabilities()
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if dropCaps != nil {
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for _, cap := range dropCaps {
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if err := specgen.DropProcessCapability(cap); err != nil {
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return nil, err
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}
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}
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}
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}
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specgen.SetProcessSelinuxLabel(sb.processLabel)
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specgen.SetLinuxMountLabel(sb.mountLabel)
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user := linux.GetSecurityContext().GetRunAsUser()
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specgen.SetProcessUID(uint32(user))
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specgen.SetProcessGID(uint32(user))
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groups := linux.GetSecurityContext().GetSupplementalGroups()
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for _, group := range groups {
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specgen.AddProcessAdditionalGid(uint32(group))
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}
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}
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// Join the namespace paths for the pod sandbox container.
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podInfraState := s.runtime.ContainerStatus(sb.infraContainer)
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logrus.Debugf("pod container state %+v", podInfraState)
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for nsType, nsFile := range map[string]string{
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"ipc": "ipc",
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"network": "net",
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} {
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nsPath := fmt.Sprintf("/proc/%d/ns/%s", podInfraState.Pid, nsFile)
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if err := specgen.AddOrReplaceLinuxNamespace(nsType, nsPath); err != nil {
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return nil, err
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}
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}
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specgen.AddAnnotation("ocid/name", containerName)
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specgen.AddAnnotation("ocid/sandbox_id", sb.id)
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specgen.AddAnnotation("ocid/log_path", logPath)
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specgen.AddAnnotation("ocid/tty", fmt.Sprintf("%v", containerConfig.GetTty()))
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metadataJSON, err := json.Marshal(metadata)
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if err != nil {
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return nil, err
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}
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specgen.AddAnnotation("ocid/metadata", string(metadataJSON))
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labelsJSON, err := json.Marshal(labels)
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if err != nil {
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return nil, err
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}
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specgen.AddAnnotation("ocid/labels", string(labelsJSON))
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if err = specgen.SaveToFile(filepath.Join(containerDir, "config.json")); err != nil {
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return nil, err
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}
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imageSpec := containerConfig.GetImage()
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if imageSpec == nil {
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return nil, fmt.Errorf("CreateContainerRequest.ContainerConfig.Image is nil")
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}
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image := imageSpec.GetImage()
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if image == "" {
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return nil, fmt.Errorf("CreateContainerRequest.ContainerConfig.Image.Image is empty")
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}
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// TODO: copy the rootfs into the bundle.
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// Currently, utils.CreateFakeRootfs is used to populate the rootfs.
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if err = utils.CreateFakeRootfs(containerDir, image); err != nil {
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return nil, err
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}
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container, err := oci.NewContainer(containerID, containerName, containerDir, logPath, labels, metadata, sb.id, containerConfig.GetTty())
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if err != nil {
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return nil, err
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}
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return container, nil
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}
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// StartContainer starts the container.
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func (s *Server) StartContainer(ctx context.Context, req *pb.StartContainerRequest) (*pb.StartContainerResponse, error) {
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logrus.Debugf("StartContainerRequest %+v", req)
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c, err := s.getContainerFromRequest(req)
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if err != nil {
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return nil, err
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}
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if err := s.runtime.StartContainer(c); err != nil {
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return nil, fmt.Errorf("failed to start container %s: %v", c.ID(), err)
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}
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resp := &pb.StartContainerResponse{}
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logrus.Debugf("StartContainerResponse %+v", resp)
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return resp, nil
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}
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// StopContainer stops a running container with a grace period (i.e., timeout).
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func (s *Server) StopContainer(ctx context.Context, req *pb.StopContainerRequest) (*pb.StopContainerResponse, error) {
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logrus.Debugf("StopContainerRequest %+v", req)
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c, err := s.getContainerFromRequest(req)
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if err != nil {
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return nil, err
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}
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if err := s.runtime.StopContainer(c); err != nil {
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return nil, fmt.Errorf("failed to stop container %s: %v", c.ID(), err)
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}
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resp := &pb.StopContainerResponse{}
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logrus.Debugf("StopContainerResponse: %+v", resp)
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return resp, nil
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}
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// RemoveContainer removes the container. If the container is running, the container
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// should be force removed.
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func (s *Server) RemoveContainer(ctx context.Context, req *pb.RemoveContainerRequest) (*pb.RemoveContainerResponse, error) {
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logrus.Debugf("RemoveContainerRequest %+v", req)
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c, err := s.getContainerFromRequest(req)
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if err != nil {
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return nil, err
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}
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if err := s.runtime.UpdateStatus(c); err != nil {
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return nil, fmt.Errorf("failed to update container state: %v", err)
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}
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cState := s.runtime.ContainerStatus(c)
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if cState.Status == oci.ContainerStateCreated || cState.Status == oci.ContainerStateRunning {
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if err := s.runtime.StopContainer(c); err != nil {
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return nil, fmt.Errorf("failed to stop container %s: %v", c.ID(), err)
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}
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}
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if err := s.runtime.DeleteContainer(c); err != nil {
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return nil, fmt.Errorf("failed to delete container %s: %v", c.ID(), err)
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}
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containerDir := filepath.Join(s.runtime.ContainerDir(), c.ID())
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if err := os.RemoveAll(containerDir); err != nil {
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return nil, fmt.Errorf("failed to remove container %s directory: %v", c.ID(), err)
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}
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s.releaseContainerName(c.Name())
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s.removeContainer(c)
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if err := s.ctrIDIndex.Delete(c.ID()); err != nil {
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return nil, err
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}
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resp := &pb.RemoveContainerResponse{}
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logrus.Debugf("RemoveContainerResponse: %+v", resp)
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return resp, nil
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}
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// filterContainer returns whether passed container matches filtering criteria
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func filterContainer(c *pb.Container, filter *pb.ContainerFilter) bool {
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if filter != nil {
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if filter.State != nil {
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if *c.State != *filter.State {
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return false
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}
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}
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if filter.LabelSelector != nil {
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sel := fields.SelectorFromSet(filter.LabelSelector)
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if !sel.Matches(fields.Set(c.Labels)) {
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return false
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}
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}
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}
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return true
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}
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|
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// ListContainers lists all containers by filters.
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func (s *Server) ListContainers(ctx context.Context, req *pb.ListContainersRequest) (*pb.ListContainersResponse, error) {
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logrus.Debugf("ListContainersRequest %+v", req)
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var ctrs []*pb.Container
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filter := req.Filter
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ctrList := s.state.containers.List()
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// Filter using container id and pod id first.
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if filter != nil {
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if filter.Id != nil {
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c := s.state.containers.Get(*filter.Id)
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if c != nil {
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if filter.PodSandboxId != nil {
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if c.Sandbox() == *filter.PodSandboxId {
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ctrList = []*oci.Container{c}
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} else {
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ctrList = []*oci.Container{}
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}
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} else {
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ctrList = []*oci.Container{c}
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}
|
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}
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} else {
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if filter.PodSandboxId != nil {
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pod := s.state.sandboxes[*filter.PodSandboxId]
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if pod == nil {
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ctrList = []*oci.Container{}
|
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} else {
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ctrList = pod.containers.List()
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}
|
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}
|
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}
|
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}
|
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|
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for _, ctr := range ctrList {
|
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if err := s.runtime.UpdateStatus(ctr); err != nil {
|
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return nil, err
|
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}
|
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|
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podSandboxID := ctr.Sandbox()
|
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cState := s.runtime.ContainerStatus(ctr)
|
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created := cState.Created.UnixNano()
|
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rState := pb.ContainerState_CONTAINER_UNKNOWN
|
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cID := ctr.ID()
|
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|
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c := &pb.Container{
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Id: &cID,
|
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PodSandboxId: &podSandboxID,
|
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CreatedAt: int64Ptr(created),
|
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Labels: ctr.Labels(),
|
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Metadata: ctr.Metadata(),
|
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}
|
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|
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switch cState.Status {
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case oci.ContainerStateCreated:
|
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rState = pb.ContainerState_CONTAINER_CREATED
|
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case oci.ContainerStateRunning:
|
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rState = pb.ContainerState_CONTAINER_RUNNING
|
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case oci.ContainerStateStopped:
|
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rState = pb.ContainerState_CONTAINER_EXITED
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}
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c.State = &rState
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|
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// Filter by other criteria such as state and labels.
|
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if filterContainer(c, req.Filter) {
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ctrs = append(ctrs, c)
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}
|
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}
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|
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resp := &pb.ListContainersResponse{
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Containers: ctrs,
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}
|
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logrus.Debugf("ListContainersResponse: %+v", resp)
|
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return resp, nil
|
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}
|
|
|
|
// ContainerStatus returns status of the container.
|
|
func (s *Server) ContainerStatus(ctx context.Context, req *pb.ContainerStatusRequest) (*pb.ContainerStatusResponse, error) {
|
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logrus.Debugf("ContainerStatusRequest %+v", req)
|
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c, err := s.getContainerFromRequest(req)
|
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if err != nil {
|
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return nil, err
|
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}
|
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|
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if err := s.runtime.UpdateStatus(c); err != nil {
|
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return nil, err
|
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}
|
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|
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containerID := c.ID()
|
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resp := &pb.ContainerStatusResponse{
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Status: &pb.ContainerStatus{
|
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Id: &containerID,
|
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Metadata: c.Metadata(),
|
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},
|
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}
|
|
|
|
cState := s.runtime.ContainerStatus(c)
|
|
rStatus := pb.ContainerState_CONTAINER_UNKNOWN
|
|
|
|
switch cState.Status {
|
|
case oci.ContainerStateCreated:
|
|
rStatus = pb.ContainerState_CONTAINER_CREATED
|
|
created := cState.Created.UnixNano()
|
|
resp.Status.CreatedAt = int64Ptr(created)
|
|
case oci.ContainerStateRunning:
|
|
rStatus = pb.ContainerState_CONTAINER_RUNNING
|
|
created := cState.Created.UnixNano()
|
|
resp.Status.CreatedAt = int64Ptr(created)
|
|
started := cState.Started.UnixNano()
|
|
resp.Status.StartedAt = int64Ptr(started)
|
|
case oci.ContainerStateStopped:
|
|
rStatus = pb.ContainerState_CONTAINER_EXITED
|
|
created := cState.Created.UnixNano()
|
|
resp.Status.CreatedAt = int64Ptr(created)
|
|
started := cState.Started.UnixNano()
|
|
resp.Status.StartedAt = int64Ptr(started)
|
|
finished := cState.Finished.UnixNano()
|
|
resp.Status.FinishedAt = int64Ptr(finished)
|
|
resp.Status.ExitCode = int32Ptr(cState.ExitCode)
|
|
}
|
|
|
|
resp.Status.State = &rStatus
|
|
|
|
logrus.Debugf("ContainerStatusResponse: %+v", resp)
|
|
return resp, nil
|
|
}
|
|
|
|
// UpdateRuntimeConfig updates the configuration of a running container.
|
|
func (s *Server) UpdateRuntimeConfig(ctx context.Context, req *pb.UpdateRuntimeConfigRequest) (*pb.UpdateRuntimeConfigResponse, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
// ExecSync runs a command in a container synchronously.
|
|
func (s *Server) ExecSync(ctx context.Context, req *pb.ExecSyncRequest) (*pb.ExecSyncResponse, error) {
|
|
logrus.Debugf("ExecSyncRequest %+v", req)
|
|
c, err := s.getContainerFromRequest(req)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := s.runtime.UpdateStatus(c); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
cState := s.runtime.ContainerStatus(c)
|
|
if !(cState.Status == oci.ContainerStateRunning || cState.Status == oci.ContainerStateCreated) {
|
|
return nil, fmt.Errorf("container is not created or running")
|
|
}
|
|
|
|
cmd := req.GetCmd()
|
|
if cmd == nil {
|
|
return nil, fmt.Errorf("exec command cannot be empty")
|
|
}
|
|
|
|
execResp, err := s.runtime.ExecSync(c, cmd, req.GetTimeout())
|
|
resp := &pb.ExecSyncResponse{
|
|
Stdout: execResp.Stdout,
|
|
Stderr: execResp.Stderr,
|
|
ExitCode: &execResp.ExitCode,
|
|
}
|
|
|
|
logrus.Debugf("ExecSyncResponse: %+v", resp)
|
|
return resp, err
|
|
}
|
|
|
|
// Exec prepares a streaming endpoint to execute a command in the container.
|
|
func (s *Server) Exec(ctx context.Context, req *pb.ExecRequest) (*pb.ExecResponse, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
// Attach prepares a streaming endpoint to attach to a running container.
|
|
func (s *Server) Attach(ctx context.Context, req *pb.AttachRequest) (*pb.AttachResponse, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
// PortForward prepares a streaming endpoint to forward ports from a PodSandbox.
|
|
func (s *Server) PortForward(ctx context.Context, req *pb.PortForwardRequest) (*pb.PortForwardResponse, error) {
|
|
return nil, nil
|
|
}
|
|
|
|
// Status returns the status of the runtime
|
|
func (s *Server) Status(ctx context.Context, req *pb.StatusRequest) (*pb.StatusResponse, error) {
|
|
return nil, nil
|
|
}
|