105 lines
3.3 KiB
Go
105 lines
3.3 KiB
Go
// Copyright 2014 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.
|
|
|
|
package docker
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"regexp"
|
|
"strconv"
|
|
|
|
"github.com/fsouza/go-dockerclient"
|
|
"github.com/google/cadvisor/container"
|
|
"github.com/google/cadvisor/info"
|
|
)
|
|
|
|
var ArgDockerEndpoint = flag.String("docker", "unix:///var/run/docker.sock", "docker endpoint")
|
|
|
|
type dockerFactory struct {
|
|
machineInfoFactory info.MachineInfoFactory
|
|
}
|
|
|
|
func (self *dockerFactory) String() string {
|
|
return "docker"
|
|
}
|
|
|
|
func (self *dockerFactory) NewContainerHandler(name string) (handler container.ContainerHandler, err error) {
|
|
client, err := docker.NewClient(*ArgDockerEndpoint)
|
|
if err != nil {
|
|
return
|
|
}
|
|
handler, err = newDockerContainerHandler(
|
|
client,
|
|
name,
|
|
self.machineInfoFactory,
|
|
)
|
|
return
|
|
}
|
|
|
|
func parseDockerVersion(full_version_string string) ([]int, error) {
|
|
version_regexp_string := "(\\d+)\\.(\\d+)\\.(\\d+)"
|
|
version_re := regexp.MustCompile(version_regexp_string)
|
|
matches := version_re.FindAllStringSubmatch(full_version_string, -1)
|
|
if len(matches) != 1 {
|
|
return nil, fmt.Errorf("Version string \"%v\" doesn't match expected regular expression: \"%v\"", full_version_string, version_regexp_string)
|
|
}
|
|
version_string_array := matches[0][1:]
|
|
version_array := make([]int, 3)
|
|
for index, version_string := range version_string_array {
|
|
version, err := strconv.Atoi(version_string)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Error while parsing \"%v\" in \"%v\"", version_string, full_version_string)
|
|
}
|
|
version_array[index] = version
|
|
}
|
|
return version_array, nil
|
|
}
|
|
|
|
// Register root container before running this function!
|
|
func Register(factory info.MachineInfoFactory, paths ...string) error {
|
|
client, err := docker.NewClient(*ArgDockerEndpoint)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to communicate with docker daemon: %v", err)
|
|
}
|
|
if version, err := client.Version(); err != nil {
|
|
return fmt.Errorf("unable to communicate with docker daemon: %v", err)
|
|
} else {
|
|
expected_version := []int{0, 11, 1}
|
|
version_string := version.Get("Version")
|
|
version, err := parseDockerVersion(version_string)
|
|
if err != nil {
|
|
return fmt.Errorf("Couldn't parse docker version: %v", err)
|
|
}
|
|
for index, number := range version {
|
|
if number > expected_version[index] {
|
|
break
|
|
} else if number < expected_version[index] {
|
|
return fmt.Errorf("cAdvisor requires docker version above %v but we have found version %v reported as \"%v\"", expected_version, version, version_string)
|
|
}
|
|
}
|
|
}
|
|
f := &dockerFactory{
|
|
machineInfoFactory: factory,
|
|
}
|
|
cf := container.AddStatsSummaryToFactory(f)
|
|
for _, p := range paths {
|
|
if p != "/" && p != "/docker" {
|
|
return fmt.Errorf("%v cannot be managed by docker", p)
|
|
}
|
|
container.RegisterContainerHandlerFactory(p, cf)
|
|
}
|
|
return nil
|
|
}
|