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cAdvisor is started as a Kubelet dependency during startup of the Kubelet before the sync loops start.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| // +build cgo,linux | ||
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| /* | ||
| Copyright 2015 Google Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
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| package cadvisor | ||
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| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "time" | ||
|
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| "github.com/GoogleCloudPlatform/kubernetes/pkg/util" | ||
| "github.com/golang/glog" | ||
| cadvisorHttp "github.com/google/cadvisor/http" | ||
| cadvisorApi "github.com/google/cadvisor/info/v1" | ||
| "github.com/google/cadvisor/manager" | ||
| "github.com/google/cadvisor/storage/memory" | ||
| "github.com/google/cadvisor/utils/sysfs" | ||
| ) | ||
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| type cadvisorClient struct { | ||
| manager.Manager | ||
| } | ||
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| var _ Interface = new(cadvisorClient) | ||
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| // TODO(vmarmol): Make configurable. | ||
| // The number of stats to keep in memory. | ||
| const statsToCache = 60 | ||
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| // Creates a cAdvisor and exports its API on the specified port if port > 0. | ||
| func New(port uint) (Interface, error) { | ||
| sysFs, err := sysfs.NewRealSysFs() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| // Create and start the cAdvisor container manager. | ||
| m, err := manager.New(memory.New(statsToCache, nil), sysFs) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| err = m.Start() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| cadvisorClient := &cadvisorClient{ | ||
| Manager: m, | ||
| } | ||
|
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| // Export the HTTP endpoint if a port was specified. | ||
| if port > 0 { | ||
| err = cadvisorClient.exportHTTP(port) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
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| return cadvisorClient, nil | ||
| } | ||
|
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| func (self *cadvisorClient) exportHTTP(port uint) error { | ||
| mux := http.NewServeMux() | ||
| err := cadvisorHttp.RegisterHandlers(mux, self, "", "", "", "", "/metrics") | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| serv := &http.Server{ | ||
| Addr: fmt.Sprintf(":%d", port), | ||
| Handler: mux, | ||
| } | ||
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| // TODO(vmarmol): Remove this when the cAdvisor port is once again free. | ||
| // If export failed, retry in the background until we are able to bind. | ||
| // This allows an existing cAdvisor to be killed before this one registers. | ||
| go func() { | ||
| defer util.HandleCrash() | ||
|
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| err := serv.ListenAndServe() | ||
| for err != nil { | ||
| glog.Infof("Failed to register cAdvisor on port %d, retrying. Error: %v", port, err) | ||
| time.Sleep(time.Minute) | ||
| err = serv.ListenAndServe() | ||
| } | ||
| }() | ||
|
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| return nil | ||
| } | ||
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| func (self *cadvisorClient) ContainerInfo(name string, req *cadvisorApi.ContainerInfoRequest) (*cadvisorApi.ContainerInfo, error) { | ||
| return self.GetContainerInfo(name, req) | ||
| } | ||
|
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| func (self *cadvisorClient) MachineInfo() (*cadvisorApi.MachineInfo, error) { | ||
| return self.GetMachineInfo() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| // +build !cgo !linux | ||
|
|
||
| /* | ||
| Copyright 2015 Google Inc. All rights reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
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| package cadvisor | ||
|
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| import ( | ||
| "errors" | ||
|
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| cadvisorApi "github.com/google/cadvisor/info/v1" | ||
| ) | ||
|
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| type cadvisorUnsupported struct { | ||
| } | ||
|
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| var _ Interface = new(cadvisorUnsupported) | ||
|
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| func New(port uint) (Interface, error) { | ||
| return &cadvisorUnsupported{}, nil | ||
| } | ||
|
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| var unsupportedErr = errors.New("cAdvisor is unsupported in this build") | ||
|
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| func (self *cadvisorUnsupported) DockerContainer(name string, req *cadvisorApi.ContainerInfoRequest) (cadvisorApi.ContainerInfo, error) { | ||
| return cadvisorApi.ContainerInfo{}, unsupportedErr | ||
| } | ||
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| func (self *cadvisorUnsupported) ContainerInfo(name string, req *cadvisorApi.ContainerInfoRequest) (*cadvisorApi.ContainerInfo, error) { | ||
| return nil, unsupportedErr | ||
| } | ||
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| func (self *cadvisorUnsupported) MachineInfo() (*cadvisorApi.MachineInfo, error) { | ||
| return nil, unsupportedErr | ||
| } |