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providers: add initial zVM hypervisor support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| // Copyright 2019 Red Hat, 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. | ||
|
|
||
| // The zVM provider fetches a local configuration from the virtual unit | ||
| // record devices. | ||
|
|
||
| package zvm | ||
|
|
||
| import ( | ||
| "io/ioutil" | ||
| "os/exec" | ||
| "strings" | ||
|
|
||
| "github.com/coreos/ignition/v2/config/shared/errors" | ||
| "github.com/coreos/ignition/v2/config/v3_1_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" | ||
| "github.com/coreos/vcontext/report" | ||
| ) | ||
|
|
||
| const readerDevice string = "000c" | ||
| const configFile string = "config.ign" | ||
|
|
||
| func FetchConfig(f *resource.Fetcher) (types.Config, report.Report, error) { | ||
| // Fetch config files directly from reader device. | ||
| _, err := f.Logger.LogCmd(exec.Command(distro.ModprobeCmd(), "vmur"), "Loading zVM control program module") | ||
| if err != nil { | ||
| f.Logger.Err("Couldn't install vmur module: %v", err) | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
| // Online the reader device. | ||
| logger := f.Logger | ||
| err = onlineDevice(logger) | ||
| if err != nil { | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
| // Read files from the z/VM reader queue. | ||
| readerInfo, err := exec.Command(distro.VmurCmd(), "li").CombinedOutput() | ||
| if err != nil { | ||
| f.Logger.Err("Can not get reader device: %v", err) | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
| items := strings.Split(string(readerInfo), "\n") | ||
| for _, records := range items { | ||
| record := strings.Fields(records) | ||
| if len(record) <= 1 { | ||
| break | ||
| } | ||
| spoolid := record[1] | ||
| file := record[9] | ||
| ftype := record[10] | ||
| // Receive the spool file. | ||
| if file == "ignition" { | ||
| if ftype != "" { | ||
| file = record[9] + "." + ftype | ||
| } | ||
| _, err := f.Logger.LogCmd(exec.Command(distro.VmurCmd(), "re", "-f", spoolid, file), "Receive the spool file") | ||
| if err == nil { | ||
| f.Logger.Info("using config file at %q", file) | ||
| _, err := f.Logger.LogCmd(exec.Command(distro.TarCmd(), "-xzvf", file), "Extract the spool file") | ||
| rawConfig, err := ioutil.ReadFile(configFile) | ||
| if err != nil { | ||
| f.Logger.Err("Couldn't read config %q: %v", file, err) | ||
| break | ||
| } | ||
| return util.ParseConfig(f.Logger, rawConfig) | ||
| } else { | ||
| return types.Config{}, report.Report{}, err | ||
| } | ||
| } | ||
| } | ||
| return types.Config{}, report.Report{}, errors.ErrEmpty | ||
| } | ||
|
|
||
| func onlineDevice(logger *log.Logger) error { | ||
| _, err := logger.LogCmd(exec.Command(distro.ChccwdevCmd(), "-e", readerDevice), "Brings a Linux device online") | ||
| if err != nil { | ||
| // If online failed, expose the device firstly. | ||
| _, err = logger.LogCmd(exec.Command(distro.CioIgnoreCmd(), "-r", readerDevice), "Expose reader device") | ||
| if err != nil { | ||
| logger.Err("Couldn't expose reader device %q: %v", readerDevice, err) | ||
| return err | ||
| } | ||
| _, err = logger.LogCmd(exec.Command(distro.ChccwdevCmd(), "-e", readerDevice), "Brings a Linux device online") | ||
| if err != nil { | ||
| logger.Err("Couldn't online reader device") | ||
| return err | ||
| } | ||
| } | ||
| _, err = logger.LogCmd(exec.Command("udevadm", "settle", "||", "udevsettle"), "Settle udev device") | ||
| return err | ||
| } |