580 lines
15 KiB
Go
580 lines
15 KiB
Go
package server
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import (
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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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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type sandbox struct {
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id string
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name string
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logDir string
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labels fields.Set
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annotations map[string]string
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infraContainer *oci.Container
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containers oci.Store
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processLabel string
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mountLabel string
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metadata *pb.PodSandboxMetadata
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}
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const (
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podInfraRootfs = "/var/lib/ocid/graph/vfs/pause"
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podDefaultNamespace = "default"
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)
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func (s *sandbox) addContainer(c *oci.Container) {
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s.containers.Add(c.Name(), c)
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}
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func (s *sandbox) getContainer(name string) *oci.Container {
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return s.containers.Get(name)
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}
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func (s *sandbox) removeContainer(c *oci.Container) {
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s.containers.Delete(c.Name())
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}
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func (s *Server) generatePodIDandName(name string, namespace 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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if namespace == "" {
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namespace = podDefaultNamespace
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}
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if name, err = s.reservePodName(id, fmt.Sprintf("%s-%s-%v", namespace, name, attempt)); 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 podSandboxRequest interface {
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GetPodSandboxId() string
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}
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func (s *Server) getPodSandboxFromRequest(req podSandboxRequest) (*sandbox, error) {
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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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return sb, nil
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}
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// RunPodSandbox creates and runs a pod-level sandbox.
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func (s *Server) RunPodSandbox(ctx context.Context, req *pb.RunPodSandboxRequest) (*pb.RunPodSandboxResponse, error) {
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logrus.Debugf("RunPodSandbox %+v", req)
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var processLabel, mountLabel string
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// process req.Name
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name := req.GetConfig().GetMetadata().GetName()
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if name == "" {
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return nil, fmt.Errorf("PodSandboxConfig.Name should not be empty")
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}
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namespace := req.GetConfig().GetMetadata().GetNamespace()
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attempt := req.GetConfig().GetMetadata().GetAttempt()
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var err error
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id, name, err := s.generatePodIDandName(name, namespace, attempt)
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if err != nil {
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return nil, err
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}
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defer func() {
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if err != nil {
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s.releasePodName(name)
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}
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}()
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if err = s.podIDIndex.Add(id); err != nil {
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return nil, err
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}
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defer func() {
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if err != nil {
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if err = s.podIDIndex.Delete(id); err != nil {
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logrus.Warnf("couldn't delete pod id %s from idIndex", id)
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}
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}
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}()
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podSandboxDir := filepath.Join(s.config.SandboxDir, id)
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if _, err = os.Stat(podSandboxDir); err == nil {
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return nil, fmt.Errorf("pod sandbox (%s) already exists", podSandboxDir)
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}
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defer func() {
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if err != nil {
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if err2 := os.RemoveAll(podSandboxDir); err2 != nil {
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logrus.Warnf("couldn't cleanup podSandboxDir %s: %v", podSandboxDir, err2)
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}
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}
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}()
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if err = os.MkdirAll(podSandboxDir, 0755); err != nil {
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return nil, err
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}
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// creates a spec Generator with the default spec.
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g := generate.New()
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podInfraRootfs := filepath.Join(s.config.Root, "graph/vfs/pause")
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// setup defaults for the pod sandbox
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g.SetRootPath(filepath.Join(podInfraRootfs, "rootfs"))
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g.SetRootReadonly(true)
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g.SetProcessArgs([]string{"/pause"})
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// set hostname
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hostname := req.GetConfig().GetHostname()
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if hostname != "" {
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g.SetHostname(hostname)
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}
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// set log directory
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logDir := req.GetConfig().GetLogDirectory()
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if logDir == "" {
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logDir = fmt.Sprintf("/var/log/ocid/pods/%s", id)
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}
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// set DNS options
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dnsServers := req.GetConfig().GetDnsConfig().GetServers()
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dnsSearches := req.GetConfig().GetDnsConfig().GetSearches()
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resolvPath := fmt.Sprintf("%s/resolv.conf", podSandboxDir)
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err = parseDNSOptions(dnsServers, dnsSearches, resolvPath)
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if err != nil {
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err1 := removeFile(resolvPath)
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if err1 != nil {
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err = err1
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return nil, fmt.Errorf("%v; failed to remove %s: %v", err, resolvPath, err1)
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}
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return nil, err
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}
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g.AddBindMount(resolvPath, "/etc/resolv.conf", "ro")
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// add labels
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labels := req.GetConfig().GetLabels()
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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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// add annotations
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annotations := req.GetConfig().GetAnnotations()
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annotationsJSON, err := json.Marshal(annotations)
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if err != nil {
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return nil, err
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}
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// Don't use SELinux separation with Host Pid or IPC Namespace,
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if !req.GetConfig().GetLinux().GetNamespaceOptions().GetHostPid() && !req.GetConfig().GetLinux().GetNamespaceOptions().GetHostIpc() {
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processLabel, mountLabel, err = getSELinuxLabels(nil)
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if err != nil {
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return nil, err
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}
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g.SetProcessSelinuxLabel(processLabel)
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}
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containerID, containerName, err := s.generateContainerIDandName(name, "infra", 0)
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if err != nil {
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return nil, err
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}
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defer func() {
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if err != nil {
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s.releaseContainerName(containerName)
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}
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}()
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if err = s.ctrIDIndex.Add(containerID); err != nil {
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return nil, err
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}
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defer func() {
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if err != nil {
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if err = s.ctrIDIndex.Delete(containerID); err != nil {
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logrus.Warnf("couldn't delete ctr id %s from idIndex", containerID)
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}
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}
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}()
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g.AddAnnotation("ocid/labels", string(labelsJSON))
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g.AddAnnotation("ocid/annotations", string(annotationsJSON))
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g.AddAnnotation("ocid/log_path", logDir)
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g.AddAnnotation("ocid/name", name)
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g.AddAnnotation("ocid/container_name", containerName)
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g.AddAnnotation("ocid/container_id", containerID)
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sb := &sandbox{
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id: id,
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name: name,
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logDir: logDir,
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labels: labels,
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annotations: annotations,
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containers: oci.NewMemoryStore(),
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processLabel: processLabel,
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mountLabel: mountLabel,
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metadata: req.GetConfig().GetMetadata(),
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}
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s.addSandbox(sb)
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for k, v := range annotations {
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g.AddAnnotation(k, v)
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}
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// setup cgroup settings
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cgroupParent := req.GetConfig().GetLinux().GetCgroupParent()
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if cgroupParent != "" {
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g.SetLinuxCgroupsPath(cgroupParent)
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}
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// set up namespaces
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if req.GetConfig().GetLinux().GetNamespaceOptions().GetHostNetwork() {
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err = g.RemoveLinuxNamespace("network")
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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 req.GetConfig().GetLinux().GetNamespaceOptions().GetHostPid() {
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err = g.RemoveLinuxNamespace("pid")
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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 req.GetConfig().GetLinux().GetNamespaceOptions().GetHostIpc() {
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err = g.RemoveLinuxNamespace("ipc")
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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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err = g.SaveToFile(filepath.Join(podSandboxDir, "config.json"))
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if err != nil {
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return nil, err
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}
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if _, err = os.Stat(podInfraRootfs); err != nil {
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if os.IsNotExist(err) {
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// TODO: Replace by rootfs creation API when it is ready
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if err = utils.CreateInfraRootfs(podInfraRootfs, s.config.Pause); err != nil {
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return nil, err
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}
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} else {
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return nil, err
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}
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}
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container, err := oci.NewContainer(containerID, containerName, podSandboxDir, podSandboxDir, labels, id, false)
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if err != nil {
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return nil, err
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}
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sb.infraContainer = container
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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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// setup the network
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podNamespace := ""
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netnsPath, err := container.NetNsPath()
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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.netPlugin.SetUpPod(netnsPath, podNamespace, id, containerName); err != nil {
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return nil, fmt.Errorf("failed to create network for container %s in sandbox %s: %v", containerName, id, err)
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}
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if err = s.runtime.StartContainer(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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return &pb.RunPodSandboxResponse{PodSandboxId: &id}, nil
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}
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// StopPodSandbox stops the sandbox. If there are any running containers in the
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// sandbox, they should be force terminated.
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func (s *Server) StopPodSandbox(ctx context.Context, req *pb.StopPodSandboxRequest) (*pb.StopPodSandboxResponse, error) {
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logrus.Debugf("StopPodSandbox %+v", req)
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sb, err := s.getPodSandboxFromRequest(req)
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if err != nil {
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return nil, err
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}
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podNamespace := ""
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podInfraContainer := sb.infraContainer
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netnsPath, err := podInfraContainer.NetNsPath()
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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.netPlugin.TearDownPod(netnsPath, podNamespace, sb.id, podInfraContainer.Name()); err != nil {
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return nil, fmt.Errorf("failed to destroy network for container %s in sandbox %s: %v",
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podInfraContainer.Name(), sb.id, err)
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}
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containers := sb.containers.List()
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containers = append(containers, podInfraContainer)
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for _, c := range containers {
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cStatus := s.runtime.ContainerStatus(c)
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if cStatus.Status != oci.ContainerStateStopped {
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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 in sandbox %s: %v", c.Name(), sb.id, err)
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}
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}
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}
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return &pb.StopPodSandboxResponse{}, nil
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}
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// RemovePodSandbox deletes the sandbox. If there are any running containers in the
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// sandbox, they should be force deleted.
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func (s *Server) RemovePodSandbox(ctx context.Context, req *pb.RemovePodSandboxRequest) (*pb.RemovePodSandboxResponse, error) {
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logrus.Debugf("RemovePodSandbox %+v", req)
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sb, err := s.getPodSandboxFromRequest(req)
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if err != nil {
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return nil, err
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}
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podInfraContainer := sb.infraContainer
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containers := sb.containers.List()
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containers = append(containers, podInfraContainer)
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// Delete all the containers in the sandbox
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for _, c := range containers {
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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.Name(), 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 in sandbox %s: %v", c.Name(), sb.id, err)
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}
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if c == podInfraContainer {
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continue
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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.Name(), err)
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}
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s.releaseContainerName(c.Name())
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s.removeContainer(c)
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}
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if err := label.UnreserveLabel(sb.processLabel); err != nil {
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return nil, err
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}
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// Remove the files related to the sandbox
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podSandboxDir := filepath.Join(s.config.SandboxDir, sb.id)
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if err := os.RemoveAll(podSandboxDir); err != nil {
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return nil, fmt.Errorf("failed to remove sandbox %s directory: %v", sb.id, err)
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}
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s.releaseContainerName(podInfraContainer.Name())
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s.removeContainer(podInfraContainer)
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sb.infraContainer = nil
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s.releasePodName(sb.name)
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s.removeSandbox(sb.id)
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return &pb.RemovePodSandboxResponse{}, nil
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}
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// PodSandboxStatus returns the Status of the PodSandbox.
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func (s *Server) PodSandboxStatus(ctx context.Context, req *pb.PodSandboxStatusRequest) (*pb.PodSandboxStatusResponse, error) {
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logrus.Debugf("PodSandboxStatus %+v", req)
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sb, err := s.getPodSandboxFromRequest(req)
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if err != nil {
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return nil, err
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}
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podInfraContainer := sb.infraContainer
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if err = s.runtime.UpdateStatus(podInfraContainer); err != nil {
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return nil, err
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}
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cState := s.runtime.ContainerStatus(podInfraContainer)
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created := cState.Created.Unix()
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netNsPath, err := podInfraContainer.NetNsPath()
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if err != nil {
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return nil, err
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}
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podNamespace := ""
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ip, err := s.netPlugin.GetContainerNetworkStatus(netNsPath, podNamespace, sb.id, podInfraContainer.Name())
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if err != nil {
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// ignore the error on network status
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ip = ""
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}
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rStatus := pb.PodSandBoxState_NOTREADY
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if cState.Status == oci.ContainerStateRunning {
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rStatus = pb.PodSandBoxState_READY
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}
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sandboxID := sb.id
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return &pb.PodSandboxStatusResponse{
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Status: &pb.PodSandboxStatus{
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Id: &sandboxID,
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CreatedAt: int64Ptr(created),
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Linux: &pb.LinuxPodSandboxStatus{
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Namespaces: &pb.Namespace{
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Network: sPtr(netNsPath),
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},
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},
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Network: &pb.PodSandboxNetworkStatus{Ip: &ip},
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State: &rStatus,
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Labels: sb.labels,
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Annotations: sb.annotations,
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Metadata: sb.metadata,
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},
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}, nil
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}
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// filterSandbox returns whether passed container matches filtering criteria
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func filterSandbox(p *pb.PodSandbox, filter *pb.PodSandboxFilter) bool {
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if filter != nil {
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if filter.State != nil {
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if *p.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(p.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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// ListPodSandbox returns a list of SandBoxes.
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func (s *Server) ListPodSandbox(ctx context.Context, req *pb.ListPodSandboxRequest) (*pb.ListPodSandboxResponse, error) {
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logrus.Debugf("ListPodSandbox %+v", req)
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var pods []*pb.PodSandbox
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var podList []*sandbox
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for _, sb := range s.state.sandboxes {
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podList = append(podList, sb)
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}
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filter := req.Filter
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// Filter by pod id first.
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if filter != nil {
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if filter.Id != nil {
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sb := s.getSandbox(*filter.Id)
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if sb == nil {
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podList = []*sandbox{}
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} else {
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podList = []*sandbox{sb}
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}
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}
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}
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for _, sb := range podList {
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podInfraContainer := sb.infraContainer
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if podInfraContainer == nil {
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// this can't really happen, but if it does because of a bug
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// it's better not to panic
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continue
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}
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if err := s.runtime.UpdateStatus(podInfraContainer); err != nil {
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return nil, err
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}
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cState := s.runtime.ContainerStatus(podInfraContainer)
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created := cState.Created.Unix()
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rStatus := pb.PodSandBoxState_NOTREADY
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if cState.Status == oci.ContainerStateRunning {
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rStatus = pb.PodSandBoxState_READY
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}
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|
|
|
pod := &pb.PodSandbox{
|
|
Id: &sb.id,
|
|
CreatedAt: int64Ptr(created),
|
|
State: &rStatus,
|
|
Labels: sb.labels,
|
|
Annotations: sb.annotations,
|
|
Metadata: sb.metadata,
|
|
}
|
|
|
|
// Filter by other criteria such as state and labels.
|
|
if filterSandbox(pod, req.Filter) {
|
|
pods = append(pods, pod)
|
|
}
|
|
}
|
|
|
|
return &pb.ListPodSandboxResponse{
|
|
Items: pods,
|
|
}, nil
|
|
}
|
|
|
|
func getSELinuxLabels(selinuxOptions *pb.SELinuxOption) (processLabel string, mountLabel string, err error) {
|
|
processLabel = ""
|
|
if selinuxOptions != nil {
|
|
user := selinuxOptions.GetUser()
|
|
if user == "" {
|
|
return "", "", fmt.Errorf("SELinuxOption.User is empty")
|
|
}
|
|
|
|
role := selinuxOptions.GetRole()
|
|
if role == "" {
|
|
return "", "", fmt.Errorf("SELinuxOption.Role is empty")
|
|
}
|
|
|
|
t := selinuxOptions.GetType()
|
|
if t == "" {
|
|
return "", "", fmt.Errorf("SELinuxOption.Type is empty")
|
|
}
|
|
|
|
level := selinuxOptions.GetLevel()
|
|
if level == "" {
|
|
return "", "", fmt.Errorf("SELinuxOption.Level is empty")
|
|
}
|
|
processLabel = fmt.Sprintf("%s:%s:%s:%s", user, role, t, level)
|
|
}
|
|
return label.InitLabels(label.DupSecOpt(processLabel))
|
|
}
|