93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
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/*
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Copyright 2015 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 rkt
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import (
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"fmt"
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"strconv"
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"strings"
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"github.com/coreos/go-systemd/dbus"
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)
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// systemdVersion is a type wraps the int to implement kubecontainer.Version interface.
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type systemdVersion int
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func (s systemdVersion) String() string {
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return fmt.Sprintf("%d", s)
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}
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func (s systemdVersion) Compare(other string) (int, error) {
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v, err := strconv.Atoi(other)
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if err != nil {
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return -1, err
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}
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if int(s) < v {
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return -1, nil
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} else if int(s) > v {
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return 1, nil
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}
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return 0, nil
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}
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// systemdInterface is an abstraction of the go-systemd/dbus to make
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// it mockable for testing.
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// TODO(yifan): Eventually we should move these functionalities to:
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// 1. a package for launching/stopping rkt pods.
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// 2. rkt api-service interface for listing pods.
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// See https://github.com/coreos/rkt/issues/1769.
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type systemdInterface interface {
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// Version returns the version of the systemd.
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Version() (systemdVersion, error)
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// ListUnits lists all the loaded units.
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ListUnits() ([]dbus.UnitStatus, error)
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// StopUnits stops the unit with the given name.
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StopUnit(name string, mode string, ch chan<- string) (int, error)
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// StopUnits restarts the unit with the given name.
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RestartUnit(name string, mode string, ch chan<- string) (int, error)
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// ResetFailedUnit resets the "failed" state of a specific unit.
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ResetFailedUnit(name string) error
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}
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// systemd implements the systemdInterface using dbus and systemctl.
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// All the functions other then Version() are already implemented by go-systemd/dbus.
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type systemd struct {
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*dbus.Conn
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}
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// newSystemd creates a systemd object that implements systemdInterface.
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func newSystemd() (*systemd, error) {
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dbusConn, err := dbus.New()
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if err != nil {
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return nil, err
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}
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return &systemd{dbusConn}, nil
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}
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// Version returns the version of the systemd.
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func (s *systemd) Version() (systemdVersion, error) {
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versionStr, err := s.Conn.GetManagerProperty("Version")
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if err != nil {
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return -1, err
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}
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result, err := strconv.Atoi(strings.Trim(versionStr, "\""))
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if err != nil {
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return -1, err
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}
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return systemdVersion(result), nil
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}
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