func PodFitsResourcesPredicate(t *T, offer *mesos.Offer) bool {
// find offered cpu and mem
var (
offeredCpus mresource.CPUShares
offeredMem mresource.MegaBytes
)
for _, resource := range offer.Resources {
if resource.GetName() == "cpus" {
offeredCpus = mresource.CPUShares(*resource.GetScalar().Value)
}
if resource.GetName() == "mem" {
offeredMem = mresource.MegaBytes(*resource.GetScalar().Value)
}
}
// calculate cpu and mem sum over all containers of the pod
// TODO (@sttts): also support pod.spec.resources.limit.request
// TODO (@sttts): take into account the executor resources
cpu := mresource.PodCPULimit(&t.Pod)
mem := mresource.PodMemLimit(&t.Pod)
log.V(4).Infof("trying to match offer with pod %v/%v: cpus: %.2f mem: %.2f MB", t.Pod.Namespace, t.Pod.Name, cpu, mem)
if (cpu > offeredCpus) || (mem > offeredMem) {
log.V(3).Infof("not enough resources for pod %v/%v: cpus: %.2f mem: %.2f MB", t.Pod.Namespace, t.Pod.Name, cpu, mem)
return false
}
return true
}
// PodResourcesProcurement converts k8s pod cpu and memory resource requirements into
// mesos resource allocations.
func PodResourcesProcurement(t *T, offer *mesos.Offer) error {
// compute used resources
cpu := mresource.PodCPULimit(&t.Pod)
mem := mresource.PodMemLimit(&t.Pod)
log.V(3).Infof("Recording offer(s) %s/%s against pod %v: cpu: %.2f, mem: %.2f MB", offer.Id, t.Pod.Namespace, t.Pod.Name, cpu, mem)
t.Spec.CPU = cpu
t.Spec.Memory = mem
return nil
}
func TestLimitedResources(t *testing.T) {
assert := assert.New(t)
task, _ := fakePodTask("limited")
pod := &task.Pod
pod.Spec = api.PodSpec{
Containers: []api.Container{{
Name: "a",
Resources: api.ResourceRequirements{
Limits: api.ResourceList{
api.ResourceCPU: *resource.NewQuantity(1, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(256*1024*1024, resource.BinarySI),
},
},
}, {
Name: "b",
Resources: api.ResourceRequirements{
Limits: api.ResourceList{
api.ResourceCPU: *resource.NewQuantity(2, resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(512*1024*1024, resource.BinarySI),
},
},
}},
}
beforeLimitingCPU := mresource.CPUForPod(pod, mresource.DefaultDefaultContainerCPULimit)
beforeLimitingMem := mresource.MemForPod(pod, mresource.DefaultDefaultContainerMemLimit)
unboundedCPU := mresource.LimitPodCPU(pod, mresource.DefaultDefaultContainerCPULimit)
unboundedMem := mresource.LimitPodMem(pod, mresource.DefaultDefaultContainerMemLimit)
cpu := mresource.PodCPULimit(pod)
mem := mresource.PodMemLimit(pod)
assert.False(unboundedCPU, "CPU resources are defined as limited")
assert.False(unboundedMem, "mem resources are defined as limited")
assert.Equal(3.0, float64(cpu))
assert.Equal(768.0, float64(mem))
assert.Equal(cpu, beforeLimitingCPU)
assert.Equal(mem, beforeLimitingMem)
}
func (s *SchedulerServer) prepareExecutorInfo(hks hyperkube.Interface) (*mesos.ExecutorInfo, *uid.UID, error) {
ci := &mesos.CommandInfo{
Shell: proto.Bool(false),
}
if s.ExecutorPath != "" {
uri, executorCmd := s.serveFrameworkArtifact(s.ExecutorPath)
ci.Uris = append(ci.Uris, &mesos.CommandInfo_URI{Value: proto.String(uri), Executable: proto.Bool(true)})
ci.Value = proto.String(fmt.Sprintf("./%s", executorCmd))
} else if !hks.FindServer(hyperkube.CommandMinion) {
return nil, nil, fmt.Errorf("either run this scheduler via km or else --executor-path is required")
} else {
if strings.Index(s.KMPath, "://") > 0 {
// URI could point directly to executable, e.g. hdfs:///km
// or else indirectly, e.g. http://acmestorage/tarball.tgz
// so we assume that for this case the command will always "km"
ci.Uris = append(ci.Uris, &mesos.CommandInfo_URI{Value: proto.String(s.KMPath), Executable: proto.Bool(true)})
ci.Value = proto.String("./km") // TODO(jdef) extract constant
} else if s.KMPath != "" {
uri, kmCmd := s.serveFrameworkArtifact(s.KMPath)
ci.Uris = append(ci.Uris, &mesos.CommandInfo_URI{Value: proto.String(uri), Executable: proto.Bool(true)})
ci.Value = proto.String(fmt.Sprintf("./%s", kmCmd))
} else {
uri, kmCmd := s.serveFrameworkArtifact(s.executable)
ci.Uris = append(ci.Uris, &mesos.CommandInfo_URI{Value: proto.String(uri), Executable: proto.Bool(true)})
ci.Value = proto.String(fmt.Sprintf("./%s", kmCmd))
}
ci.Arguments = append(ci.Arguments, hyperkube.CommandMinion)
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--run-proxy=%v", s.RunProxy))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--proxy-bindall=%v", s.ProxyBindall))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--proxy-logv=%d", s.ProxyLogV))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--path-override=%s", s.MinionPathOverride))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--max-log-size=%v", s.MinionLogMaxSize.String()))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--max-log-backups=%d", s.MinionLogMaxBackups))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--max-log-age=%d", s.MinionLogMaxAgeInDays))
}
if s.DockerCfgPath != "" {
uri := s.serveFrameworkArtifactWithFilename(s.DockerCfgPath, ".dockercfg")
ci.Uris = append(ci.Uris, &mesos.CommandInfo_URI{Value: proto.String(uri), Executable: proto.Bool(false), Extract: proto.Bool(false)})
}
//TODO(jdef): provide some way (env var?) for users to customize executor config
//TODO(jdef): set -address to 127.0.0.1 if `address` is 127.0.0.1
apiServerArgs := strings.Join(s.APIServerList, ",")
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--api-servers=%s", apiServerArgs))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--v=%d", s.ExecutorLogV)) // this also applies to the minion
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--allow-privileged=%t", s.AllowPrivileged))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--suicide-timeout=%v", s.ExecutorSuicideTimeout))
if s.ExecutorBindall {
//TODO(jdef) determine whether hostname-override is really needed for bindall because
//it conflicts with kubelet node status checks/updates
//ci.Arguments = append(ci.Arguments, "--hostname-override=0.0.0.0")
ci.Arguments = append(ci.Arguments, "--address=0.0.0.0")
}
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--mesos-cgroup-prefix=%v", s.MesosCgroupPrefix))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--cadvisor-port=%v", s.KubeletCadvisorPort))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--sync-frequency=%v", s.KubeletSyncFrequency))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--contain-pod-resources=%t", s.ContainPodResources))
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--enable-debugging-handlers=%t", s.EnableProfiling))
if s.AuthPath != "" {
//TODO(jdef) should probably support non-local files, e.g. hdfs:///some/config/file
uri, basename := s.serveFrameworkArtifact(s.AuthPath)
ci.Uris = append(ci.Uris, &mesos.CommandInfo_URI{Value: proto.String(uri)})
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--auth-path=%s", basename))
}
appendOptional := func(name string, value string) {
if value != "" {
ci.Arguments = append(ci.Arguments, fmt.Sprintf("--%s=%s", name, value))
}
}
if s.ClusterDNS != nil {
appendOptional("cluster-dns", s.ClusterDNS.String())
}
appendOptional("cluster-domain", s.ClusterDomain)
appendOptional("root-dir", s.KubeletRootDirectory)
appendOptional("docker-endpoint", s.KubeletDockerEndpoint)
appendOptional("pod-infra-container-image", s.KubeletPodInfraContainerImage)
appendOptional("host-network-sources", s.KubeletHostNetworkSources)
appendOptional("network-plugin", s.KubeletNetworkPluginName)
log.V(1).Infof("prepared executor command %q with args '%+v'", ci.GetValue(), ci.Arguments)
// Create mesos scheduler driver.
execInfo := &mesos.ExecutorInfo{
Command: ci,
Name: proto.String(execcfg.DefaultInfoName),
Source: proto.String(execcfg.DefaultInfoSource),
}
// Check for staticPods
var staticPodCPUs, staticPodMem float64
if s.StaticPodsConfigPath != "" {
bs, paths, err := archive.ZipDir(s.StaticPodsConfigPath)
if err != nil {
return nil, nil, err
}
// try to read pod files and sum resources
// TODO(sttts): don't terminate when static pods are broken, but skip them
// TODO(sttts): add a directory watch and tell running executors about updates
for _, podPath := range paths {
podJson, err := ioutil.ReadFile(podPath)
if err != nil {
return nil, nil, fmt.Errorf("error reading static pod spec: %v", err)
}
pod := api.Pod{}
err = json.Unmarshal(podJson, &pod)
if err != nil {
return nil, nil, fmt.Errorf("error parsing static pod spec at %v: %v", podPath, err)
}
// TODO(sttts): allow unlimited static pods as well and patch in the default resource limits
unlimitedCPU := mresource.LimitPodCPU(&pod, s.DefaultContainerCPULimit)
unlimitedMem := mresource.LimitPodMem(&pod, s.DefaultContainerMemLimit)
if unlimitedCPU {
return nil, nil, fmt.Errorf("found static pod without limit on cpu resources: %v", podPath)
}
if unlimitedMem {
return nil, nil, fmt.Errorf("found static pod without limit on memory resources: %v", podPath)
}
cpu := mresource.PodCPULimit(&pod)
mem := mresource.PodMemLimit(&pod)
log.V(2).Infof("reserving %.2f cpu shares and %.2f MB of memory to static pod %s", cpu, mem, pod.Name)
staticPodCPUs += float64(cpu)
staticPodMem += float64(mem)
}
// pass zipped pod spec to executor
execInfo.Data = bs
}
execInfo.Resources = []*mesos.Resource{
mutil.NewScalarResource("cpus", float64(s.MesosExecutorCPUs)+staticPodCPUs),
mutil.NewScalarResource("mem", float64(s.MesosExecutorMem)+staticPodMem),
}
// calculate ExecutorInfo hash to be used for validating compatibility
// of ExecutorInfo's generated by other HA schedulers.
ehash := hashExecutorInfo(execInfo)
eid := uid.New(ehash, execcfg.DefaultInfoID)
execInfo.ExecutorId = &mesos.ExecutorID{Value: proto.String(eid.String())}
return execInfo, eid, nil
}
func (r *RequireSomePodResources) Procure(t *T, offer *mesos.Offer) error {
// write resource limits into the pod spec which is transferred to the executor. From here
// on we can expect that the pod spec of a task has proper limits for CPU and memory.
// TODO(sttts): For a later separation of the kubelet and the executor also patch the pod on the apiserver
// TODO(jdef): changing the state of t.Pod here feels dirty, especially since we don't use a kosher
// method to clone the api.Pod state in T.Clone(). This needs some love.
if unlimitedCPU := mresource.LimitPodCPU(&t.Pod, r.defaultContainerCPULimit); unlimitedCPU {
log.V(2).Infof("Pod %s/%s without cpu limits is admitted %.2f cpu shares", t.Pod.Namespace, t.Pod.Name, mresource.PodCPULimit(&t.Pod))
}
if unlimitedMem := mresource.LimitPodMem(&t.Pod, r.defaultContainerMemLimit); unlimitedMem {
log.V(2).Infof("Pod %s/%s without memory limits is admitted %.2f MB", t.Pod.Namespace, t.Pod.Name, mresource.PodMemLimit(&t.Pod))
}
return nil
}