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Merge pull request #1334 from rmohr/kubevirt
Add KubeVirt support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| // Copyright 2021 Red Hat. | ||
| // | ||
| // 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. | ||
|
|
||
| // The KubeVirt (https://kubevirt.io) provider fetches | ||
| // configuration from the userdata available in the config-drive. It is similar | ||
| // to Openstack and uses the same APIs. | ||
|
|
||
| package kubevirt | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io/ioutil" | ||
| "os" | ||
| "os/exec" | ||
| "path/filepath" | ||
| "time" | ||
|
|
||
| "github.com/coreos/ignition/v2/config/v3_4_experimental/types" | ||
| "github.com/coreos/ignition/v2/internal/distro" | ||
| "github.com/coreos/ignition/v2/internal/log" | ||
| "github.com/coreos/ignition/v2/internal/providers/util" | ||
| "github.com/coreos/ignition/v2/internal/resource" | ||
| ut "github.com/coreos/ignition/v2/internal/util" | ||
|
|
||
| "github.com/coreos/vcontext/report" | ||
| ) | ||
|
|
||
| const ( | ||
| configDriveUserdataPath = "/openstack/latest/user_data" | ||
| ) | ||
|
|
||
| func FetchConfig(f *resource.Fetcher) (types.Config, report.Report, error) { | ||
| data, err := fetchConfigFromDevice(f.Logger, filepath.Join(distro.DiskByLabelDir(), "config-2")) | ||
| if err != nil { | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
|
|
||
| return util.ParseConfig(f.Logger, data) | ||
| } | ||
|
|
||
| func fileExists(path string) bool { | ||
| _, err := os.Stat(path) | ||
| return (err == nil) | ||
| } | ||
|
|
||
| func fetchConfigFromDevice(logger *log.Logger, path string) ([]byte, error) { | ||
| // There is not always a config drive in kubevirt, but we can limit ignition usage | ||
| // to VMs with config drives. Block forever if there is none. | ||
| for !fileExists(path) { | ||
| logger.Debug("config drive (%q) not found. Waiting...", path) | ||
| time.Sleep(time.Second) | ||
| } | ||
|
|
||
| logger.Debug("creating temporary mount point") | ||
| mnt, err := ioutil.TempDir("", "ignition-configdrive") | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to create temp directory: %v", err) | ||
| } | ||
| defer os.Remove(mnt) | ||
|
|
||
| cmd := exec.Command(distro.MountCmd(), "-o", "ro", "-t", "auto", path, mnt) | ||
| if _, err := logger.LogCmd(cmd, "mounting config drive"); err != nil { | ||
| return nil, err | ||
| } | ||
| defer func() { | ||
| _ = logger.LogOp( | ||
| func() error { | ||
| return ut.UmountPath(mnt) | ||
| }, | ||
| "unmounting %q at %q", path, mnt, | ||
| ) | ||
| }() | ||
|
|
||
| mntConfigDriveUserdataPath := filepath.Join(mnt, configDriveUserdataPath) | ||
| if !fileExists(mntConfigDriveUserdataPath) { | ||
| return nil, nil | ||
| } | ||
|
|
||
| return ioutil.ReadFile(mntConfigDriveUserdataPath) | ||
| } |