310 lines
8 KiB
Go
310 lines
8 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/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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pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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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("RunPodSandboxRequest %+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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// TODO: Make the `graph/vfs` part of this configurable once the storage
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// integration has been merged.
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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 = filepath.Join(s.config.LogDir, 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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dnsOptions := req.GetConfig().GetDnsConfig().GetOptions()
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resolvPath := fmt.Sprintf("%s/resolv.conf", podSandboxDir)
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err = parseDNSOptions(dnsServers, dnsSearches, dnsOptions, 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 metadata
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metadata := req.GetConfig().GetMetadata()
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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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// 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().GetSecurityContext().GetNamespaceOptions().GetHostPid() && !req.GetConfig().GetLinux().GetSecurityContext().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/metadata", string(metadataJSON))
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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: metadata,
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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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// extract linux sysctls from annotations and pass down to oci runtime
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safe, unsafe, err := SysctlsFromPodAnnotations(annotations)
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if err != nil {
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return nil, err
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}
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for _, sysctl := range safe {
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g.AddLinuxSysctl(sysctl.Name, sysctl.Value)
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}
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for _, sysctl := range unsafe {
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g.AddLinuxSysctl(sysctl.Name, sysctl.Value)
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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().GetSecurityContext().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().GetSecurityContext().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().GetSecurityContext().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, nil, 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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resp := &pb.RunPodSandboxResponse{PodSandboxId: &id}
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logrus.Debugf("RunPodSandboxResponse: %+v", resp)
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return resp, nil
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}
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func getSELinuxLabels(selinuxOptions *pb.SELinuxOption) (processLabel string, mountLabel string, err error) {
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processLabel = ""
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if selinuxOptions != nil {
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user := selinuxOptions.GetUser()
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if user == "" {
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return "", "", fmt.Errorf("SELinuxOption.User is empty")
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}
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role := selinuxOptions.GetRole()
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if role == "" {
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return "", "", fmt.Errorf("SELinuxOption.Role is empty")
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}
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t := selinuxOptions.GetType()
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if t == "" {
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return "", "", fmt.Errorf("SELinuxOption.Type is empty")
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}
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level := selinuxOptions.GetLevel()
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if level == "" {
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return "", "", fmt.Errorf("SELinuxOption.Level is empty")
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}
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processLabel = fmt.Sprintf("%s:%s:%s:%s", user, role, t, level)
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}
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return label.InitLabels(label.DupSecOpt(processLabel))
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}
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