mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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137 lines
3.6 KiB
Go
137 lines
3.6 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package e2enode
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import (
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"context"
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"fmt"
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"github.com/blang/semver"
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systemdutil "github.com/coreos/go-systemd/util"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/client"
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)
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const (
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defaultDockerEndpoint = "unix:///var/run/docker.sock"
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)
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// getDockerAPIVersion returns the Docker's API version.
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func getDockerAPIVersion() (semver.Version, error) {
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c, err := client.NewClient(defaultDockerEndpoint, "", nil, nil)
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if err != nil {
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return semver.Version{}, fmt.Errorf("failed to create docker client: %v", err)
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}
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version, err := c.ServerVersion(context.Background())
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if err != nil {
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return semver.Version{}, fmt.Errorf("failed to get docker server version: %v", err)
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}
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return semver.MustParse(version.APIVersion + ".0"), nil
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}
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// isSharedPIDNamespaceSupported returns true if the Docker version is 1.13.1+
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// (API version 1.26+), and false otherwise.
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func isSharedPIDNamespaceSupported() (bool, error) {
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version, err := getDockerAPIVersion()
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if err != nil {
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return false, err
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}
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return version.GTE(semver.MustParse("1.26.0")), nil
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}
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// isDockerLiveRestoreSupported returns true if live-restore is supported in
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// the current Docker version.
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func isDockerLiveRestoreSupported() (bool, error) {
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version, err := getDockerAPIVersion()
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if err != nil {
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return false, err
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}
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return version.GTE(semver.MustParse("1.26.0")), nil
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}
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// getDockerInfo returns the Info struct for the running Docker daemon.
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func getDockerInfo() (types.Info, error) {
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var info types.Info
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c, err := client.NewClient(defaultDockerEndpoint, "", nil, nil)
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if err != nil {
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return info, fmt.Errorf("failed to create docker client: %v", err)
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}
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info, err = c.Info(context.Background())
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if err != nil {
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return info, fmt.Errorf("failed to get docker info: %v", err)
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}
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return info, nil
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}
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// isDockerLiveRestoreEnabled returns true if live-restore is enabled in the
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// Docker.
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func isDockerLiveRestoreEnabled() (bool, error) {
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info, err := getDockerInfo()
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if err != nil {
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return false, err
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}
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return info.LiveRestoreEnabled, nil
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}
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// getDockerLoggingDriver returns the name of the logging driver.
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func getDockerLoggingDriver() (string, error) {
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info, err := getDockerInfo()
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if err != nil {
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return "", err
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}
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return info.LoggingDriver, nil
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}
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// isDockerSELinuxSupportEnabled checks whether the Docker daemon was started
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// with SELinux support enabled.
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func isDockerSELinuxSupportEnabled() (bool, error) {
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info, err := getDockerInfo()
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if err != nil {
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return false, err
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}
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for _, s := range info.SecurityOptions {
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if s == "selinux" {
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return true, nil
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}
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}
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return false, nil
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}
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// startDockerDaemon starts the Docker daemon.
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func startDockerDaemon() error {
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switch {
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case systemdutil.IsRunningSystemd():
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_, err := runCommand("systemctl", "start", "docker")
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return err
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default:
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_, err := runCommand("service", "docker", "start")
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return err
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}
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}
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// stopDockerDaemon stops the Docker daemon.
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func stopDockerDaemon() error {
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switch {
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case systemdutil.IsRunningSystemd():
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_, err := runCommand("systemctl", "stop", "docker")
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return err
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default:
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_, err := runCommand("service", "docker", "stop")
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return err
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}
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}
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