cloudinit/system/unit.go

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/*
Copyright 2014 CoreOS, Inc.
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 system
import (
"fmt"
"path"
"github.com/coreos/coreos-cloudinit/config"
)
// Name for drop-in service configuration files created by cloudconfig
const cloudConfigDropIn = "20-cloudinit.conf"
type UnitManager interface {
PlaceUnit(unit *Unit, dst string) error
EnableUnitFile(unit string, runtime bool) error
RunUnitCommand(command, unit string) (string, error)
DaemonReload() error
MaskUnit(unit *Unit) error
UnmaskUnit(unit *Unit) error
}
// Unit is a top-level structure which embeds its underlying configuration,
// config.Unit, and provides the system-specific Destination().
type Unit struct {
config.Unit
}
// Destination builds the appropriate absolute file path for
// the Unit. The root argument indicates the effective base
// directory of the system (similar to a chroot).
func (u *Unit) Destination(root string) string {
dir := "etc"
if u.Runtime {
dir = "run"
}
if u.DropIn {
return path.Join(root, dir, "systemd", u.Group(), fmt.Sprintf("%s.d", u.Name), cloudConfigDropIn)
} else {
return path.Join(root, dir, "systemd", u.Group(), u.Name)
}
}