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raid.go
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raid.go
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// Copyright 2018 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.
// The storage stage is responsible for partitioning disks, creating RAID
// arrays, formatting partitions, writing files, writing systemd units, and
// writing network units.
// createRaids creates the raid arrays described in config.Storage.Raid.
package disks
import (
"fmt"
"os/exec"
"github.com/coreos/ignition/internal/config/types"
"github.com/coreos/ignition/internal/distro"
"github.com/coreos/ignition/internal/exec/util"
)
func (s stage) createRaids(config types.Config) error {
if len(config.Storage.Raid) == 0 {
return nil
}
s.Logger.PushPrefix("createRaids")
defer s.Logger.PopPrefix()
devs := []string{}
for _, array := range config.Storage.Raid {
for _, dev := range array.Devices {
devs = append(devs, string(dev))
}
}
if err := s.waitOnDevicesAndCreateAliases(devs, "raids"); err != nil {
return err
}
for _, md := range config.Storage.Raid {
args := []string{
"--create", md.Name,
"--force",
"--run",
"--homehost", "any",
"--level", md.Level,
"--raid-devices", fmt.Sprintf("%d", len(md.Devices)-md.Spares),
}
if md.Spares > 0 {
args = append(args, "--spare-devices", fmt.Sprintf("%d", md.Spares))
}
for _, o := range md.Options {
args = append(args, string(o))
}
for _, dev := range md.Devices {
args = append(args, util.DeviceAlias(string(dev)))
}
if _, err := s.Logger.LogCmd(
exec.Command(distro.MdadmCmd(), args...),
"creating %q", md.Name,
); err != nil {
return fmt.Errorf("mdadm failed: %v", err)
}
}
return nil
}