github.com/blixtra/rkt@v0.8.1-0.20160204105720-ab0d1add1a43/stage1/init/kvm.go (about)

     1  // Copyright 2014 The rkt Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //+build linux
    16  
    17  package main
    18  
    19  import (
    20  	"errors"
    21  	"path/filepath"
    22  
    23  	"github.com/appc/spec/schema/types"
    24  
    25  	"github.com/coreos/rkt/common"
    26  	"github.com/coreos/rkt/networking"
    27  	stage1commontypes "github.com/coreos/rkt/stage1/common/types"
    28  	stage1initcommon "github.com/coreos/rkt/stage1/init/common"
    29  	"github.com/coreos/rkt/stage1/init/kvm"
    30  	"github.com/hashicorp/errwrap"
    31  )
    32  
    33  // KvmPodToSystemd generates systemd unit files for a pod according to the manifest and network configuration
    34  func KvmPodToSystemd(p *stage1commontypes.Pod, n *networking.Networking) error {
    35  	podRoot := common.Stage1RootfsPath(p.Root)
    36  
    37  	// networking
    38  	netDescriptions := kvm.GetNetworkDescriptions(n)
    39  	if err := kvm.GenerateNetworkInterfaceUnits(filepath.Join(podRoot, stage1initcommon.UnitsDir), netDescriptions); err != nil {
    40  		return errwrap.Wrap(errors.New("failed to transform networking to units"), err)
    41  	}
    42  
    43  	// volumes
    44  	// prepare all applications names to become dependency for mount units
    45  	// all host-shared folder has to become available before applications starts
    46  	appNames := []types.ACName{}
    47  	for _, runtimeApp := range p.Manifest.Apps {
    48  		appNames = append(appNames, runtimeApp.Name)
    49  	}
    50  	// mount host volumes through some remote file system e.g. 9p to /mnt/volumeName location
    51  	// order is important here: PodToSystemHostMountUnits prepares folders that are checked by each appToSystemdMountUnits later
    52  	if err := stage1initcommon.PodToSystemdHostMountUnits(podRoot, p.Manifest.Volumes, appNames, stage1initcommon.UnitsDir); err != nil {
    53  		return errwrap.Wrap(errors.New("failed to transform pod volumes into mount units"), err)
    54  	}
    55  
    56  	return nil
    57  }